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In the hospital, my daughter was informed by the doctor that there was nothing wrong with her after being knocked down by the car, but she was not really pregnant. My daughter cried loudly at the moment she heard the bad news. The ac brushless motor electric owner proposed sending her home, but she refused, saying that she wanted to be quiet for a while. My relatives by marriage did not know the news after my daughter got home that day, and my son-in-law still smiled to her when he came back from the industrial dc motors factory. When they were having supper, they remained the same and gave my daughter the best food, saying that she had been pregnant and needed to eat well. My daughter could not help crying when they treated her so well. She ran out and stood beside her latest electric bicycle. My son-in-law ran after her and asked her what the matter was. Seeing that her husband was very anxious and my daughter did not want to cheat him and told him the truth.

I was in tears on the way to the county that day, because I thought it was hard-won that my family had everything we wanted; the head leader of the government, the factory director of the dc brushless motors factory, the supermarket my old friend helped opening and a new house in the county. When they saw me crying, they asked me not to, for it was a happy day and I should not cry. I was only too excited and could not help crying. We arrived at the county thirty minutes later. My husband stopped the car beside a new electric e bike and then we entered the restaurant. We ordered a lot of dishes that day and it was the first time I had so delicious food. My son-in-law and my daughter asked me enjoy to my heart’s content. I saw a man riding a motorized bicycle staring at me outside of the window when we were eating. I was a country woman and maybe he felt that I was a little incompatible with that kind of occasion or maybe my makeup was too strange or maybe I had thought too much.

My son-in-law was very disappointed when my daughter told him the bad news, saying that we had tormented all members of his family for such a long period of time and she should have had told him that she was not really pregnant in the end. “What a funny!” he said. He rode his electric e bike and went out soon after. My daughter knew that he had gotten angry with her. She called him and ran after him, but he turned a deaf ear on her and continued riding on. My daughter was sad and went on her motorized bicycle and rode with the fastest speed pursuing her husband, who stopped at the roadside and went off the car. My daughter also stopped and began to talk with him. She said that she could do nothing when she heard the news. He stood beside the brushless dc motor electric car, saying that he was very angry, because he, his father and his mother had thought she was really pregnant and gave her the best food. They did not allow her to do anything and would be sadder after they got to know the fact.

My male relative was indifferent to me when I went to his house and borrowed the salt. I knew that he had gotten angry with me when my daughter was pregnant and I had gesticulated to every member of his family and all of them were bullied not a few. But one day, my daughter fell from her brushless ac motor electric car and was sent to the hospital afterwards. The doctor told them that my daughter was not really pregnant and they got very angry and they wanted to torment and revenged me. I went on the electric bicycle and went home in a bad mood. I only wanted them to more concern about my daughter and had no other malice, and I had never thought they would bear grudge and wanted to torment me. In their minds, I should have had afflicted them deliberately when my daughter conceived. A car knocked my bike electric and I fell down from it on the way back home. The salt spread onto the ground. I was out of luck that day. It was really hard to borrow a little salt.

My daughter was extremely happy when I told her that her father had gotten promoted in the government. My daughter told my son-in-law, who had worked in his cousin’s brushless electric motors factory for three years and just gotten promoted to be the factory in the new branch factory at that time, he was also very happy when he heard the good news and wanted to treat us to have a dinner in the county one day when he came back from the factory by riding the best electric bike . I told him that it was unnecessary; after all, we were in the same family, and it was unnecessary for him to be modest, but he was so insistent that we had to follow his advice and went to the county to have a dinner. I called my one of cousins and asked her to help me look after my supermarket. She arrived with her motorized bicycle half an hour later. She would help me to look after the supermarket as long as I asked for her help. She was a good woman, but unfortunately, she was unable to give birth to a baby.

My daughter, my son-in-law, my husband and me, all people was in the car and my husband started it and drove towards the county. I seldom went to the county and it was the first time that all my family members went together to the county. On the way, we encountered one of our villagers riding his electric tricycle to pull vegetables, I asked my husband stopped the car and called him and told him about the good news, he congratulated us and drove on. To be frank, it was the first time that I was so happy; my husband got promoted in the government and so did my son-in-law in the electric brushless motors factory. It was double happiness and I thanked them giving me such a complete and happy family. I was an ordinary woman, but I was very lucky having a supermarket and a good husband and daughter and son-in-law. I rode the worst gas powered bicycle ten years ago and I had everything ten years later. I was very content and thanked and would never forget people helping me when I was in need of help.

After my cousin got to my supermarket, I went home and used my daughter’s cosmetics to make up myself and was beautiful dressed that day. I spent a very long time on making up myself and my husband kept on calling me outside our house. When I went out, I saw my daughter riding her electric bike just coming back from the health center of the village. She and my husband got a shock when they saw me making up and dressing like that. It was the first time I dressed like that and I felt a little strange. My daughter stopped her latest electric bicycle at the courtyard and walked towards me. She laughed, saying that I had used too much cosmetics and not made up well. I had never made up before, but in order to give my husband face, I made up that day, and my husband said that I was an old alluring woman. When my son-in-law came back from the brushless motors factory, he was also astonished and looked at me with his strange eyes. I felt embarrassed and wanted to clean it up, my husband pulled me and asked me not to waste time.

After I settled my son-in-law’s telephone, my own mobile phone rang and I answered. It was one of our villagers and also the deputy director of the village, saying that he had rode his e electric bike and came to my supermarket to buy salt, but the supermarket door was closed off and his wife was waiting for the salt cooking. His voice was very hurried and criticized me that I was irresponsible to the civilians closing the door during the day. I hung his phone and called my cousin, who had come to the supermarket with her motorized bicycle when I left there. I asked where she was and why did not stay at the supermarket and the deputy director of the village was unhappy when he saw the door closed. She told me that she had ridden her Novak brushless motor electric car and went to her husband’s company to negotiate something with him two hours ago. I was very disappointed and hung the phone. I redialed the deputy director’s number and explained to him and asked him to borrow salt.

Stepper motor is a kind of implementing agency converts electrical pulses into angular displacement of the, they have been widely used in various automation control systems. Stepper motor is a motor r Digital control, it will convert pulse signal into angular displacement, and that is, to give a pulse signal, the stepper motor will rotate to an angle, so it is suitable for digital motor controls system. As industrial technology’s advancement, such as automatic control, precision machining, aerospace technology, and all the requirements of high-precision positioning, auto record, auto targeting high-tech areas , the breakdown of the stepper motor have become increasingly demanding. Subdivision stepper motor driver technology can reduce the step angle stepper motor to improve the smooth running of the motor and increase the flexibility of control.

Ocean Electric Co., Ltd. is located in Western Shalang third industrial zone, Zhongshan City, Guangdong Province, the company registered capital of 94 million, it mainly engaged in the development, production and sales of micro motor, the annual production capacity is more than two thousand million micro motor units, Main Products consist of Fan load class brush motor, washing machine motor, brushless DC motors and energy efficient intelligence; product applications range from home appliances (high-grade central air conditioning, home air conditioners, washing machines, etc.), home (garage doors, domestic wells, SPA with a bath, etc.) medical and health equipment (various massage health care equipment, medical equipment, etc.), play equipment (large play equipment, amusement machines and other places of entertainment) ....;

Motor is the most important parts of electric bike, the performance and quality of an e bike base on the motor it choose. Currently almost all motors used in electric bicycles are efficient permanent magnet motor, which was divided into high-speed brush + gear motor, low speed brush motor and brushless motors three kinds, at present, high-speed brush + current gear motor’s performance is best, and the price is also most expensive, low-speed brush motors is relatively cheaper, But the performance should be worse; brushless motor has high quality requirements for brushless motor controllers, there are few listed brands in the market,, consumers should select the best brands, because the quality of them are guaranteed.

With the continuous improvement of electronic components performance and integration and the lower of the price, the electronic control unit development is rapid. With the appearing of large numbers of various technologies and applications, from home appliances to industrial automation production line, we increasable focus on in the design, power efficiency and overall system cost. At the same time, the complexity of motion control applications has become more sophisticated. No matter AC motor, DC motor, brush motor, brushless motor or other a variety of motors’ control circuit consists of three parts: man-machine interface, a microcontroller (MCU) and control logic. For the closed-loop motion control, sensor interface is added up with an additional element.

Motor controller is the components to control motor speed; it is the core of electric vehicle electrical system, it was equipped with voltage, current limit or over-current protection functions. Controller also has a variety of riding mode and the vehicle electrical components self-test function. Controller is the core components of electric vehicle energy management and various control signal processing. Brake handle, power sensors and other parts is input signal component of the controller. Transfer is electric vehicle brake speed signal. When the electric bike braking, the brake the internal electronic circuit will send out a signal to the controller; after controller receives this signal, the motor will cut off the power supply in order to achieve braking power function. Thus, Controller is an integral part of e bike.

Brushless DC motor can be divided into ontology, magnetic pole position sensor, and electronic reversing switch circuit (inverter) three parts. The armature winding is in the stator and the rotor was formed by the permanent magnet. Three-phase brushless motor bridge circuit at any moment are only under the bridge arm and each leg of a transistor, so that the two-phase in three-phase windings in series to the power, while the remaining one phase winding is not energized; The magnetic field generated by the stator and rotor permanent magnetic field is interactive, the rotor to produce torque drive turning. According to rotor position the Hall sensor measured, according to the order of 6 beats a pass transistor, resulting in changes in the order of the brushless motor stator rotating magnetic field.

In 1995, when the concept of motion control has not been accepted by the public generally, four-way electrical high-performance hybrid stepper motorand motor driver products enter into the sub-market, products quickly spread with superior performance, in 2000 Stone Motor Company was formed, it adhering to the professional and technical innovation and focus on creating precise control of motor motion control and drive core products. Through the development of tens of years, Stone Motor sustain and rapidly grow to China leader in the field of motion motor controls, it serve for the textile, machining, laser, engraving, printing, medical, packaging, military, electronics, pharmaceuticals, finance and other industries to provide its own brand of machinery, precision control the motor and drive, mechanical drive unit, PLC and motion control systems, vision measuring systems, multi-level high-tech products and systems integration.

In 2002, Stone motor company cooperated with Lee Motor Company and renamed Beijing the company name as Beijing Lee Motor Company, the company fully retains the excellent four-way direction of the team and business continuity, at the same time, it turn over all of numerical control R & D results in the field of communication and control of Lee system company. Belgium with leading market share leading market share of strong independent research and development and industrial automation in China, the company gain a greater development space and more resources, the company operating performance continued to grow steadily. In recent years, the company independently developed the stepper motor and driver, brushless DC motors andbrushless DC driver, AC servo motor and drive three series of core products (more than 30 drivers, nearly 400 types of motors) and some numerical control products have entered the domestic market

The demand for sewing machine is significant, but there is just a little profit, if you want to do better quality, you need to invest large funds in the automated processing of special machine equipment, and sewing machine did not become the focus project of the sewing machine business. Time into 2007, the sewing machine market was slumping, most of the sewing machines are not popular, but the three servo motor controls automatic computer sewing machine is the brightest spot of the special popular. The sewing machine not only was selling in large amount, but also the benefit is attractive. With a servo control brushless motor, the entire price is increasing and the gross profit is also increasing more than before, three automatic computer sewing machines instantly became the main competitive products of the company.

As the advances of technology, manufacturing technology for servo motor disorders recently has some sort relief program; Sewing machine factory is make strides towards progress and self-manufacturing servo motor and servo motor controller, Servo motor can be divided into permanent magnet AC servo motor control two parts. Servo control technology previously was considered as difficult high-end technology, but now module is now ripe for DSP (digital signal processor), PWM (pulse modulation module), and IPM. Power conversion module these products are very mature in the market, as for the permanent magnet AC motor, you can find them in electric motor factory. Japanese heavy machine (JUKI) and brother (BROTHER) is not only produce control system, they also buy a permanent magnet AC electric motor from other producers.

I was heart-broken after my money was stolen in the railway station and could not settle down in theHimax brushless motors factory at all. I left the factory without telling anybody the next afternoon and went to drink in the bar. I had never done bad things in my life and why I had encountered such an unfortunate thing. I could not accept the fact. I was going to take the money to cure my mother’s disease in my hometown, but it should have had been lost in the station. I hated and despised the thief. I was drunk and could not ride my electric powered bicycle home that day, so I took a taxi. I had drunk for the whole day that day. When I woke up the next day, I found my factory director sitting beside my bed. She asked me what the matter was. I told her about the truth. She told me that she could help me and asked me to go to work. I nodded and went to fetch my electric bike in the bar. My factory leader handed me an envelop when I arrived at her office, saying that the workers hand donated a little money to me.

AC linear servo motor direct drive feed technology has become mature. CNC machine tool feed drives have "high-speed rotary servo motor and precision ball screw" and the "linear brushless motor direct drive" two types. Traditional ball screw technology maturity process is in high precision, and the cost of high achieving the speed relatively is low, so now it is widely used. Using the roll, bead screw-driven high-speed machine tool’s maximum speed is 90m/min, the acceleration is 1.5g. But the ball screw is mechanical transmission; there is the elastic deformation, friction and backlash between Mechanical components and the corresponding movement will cause delay and nonlinear error, so it further increases the speed and acceleration of ball screw. After 90 years, in the large-scale high-speed high-precision machine tools, the application of linear motor drivers feed is prevalent.

I was born in a village since I was a child and fell in love with a girl when I went to the high school. But she loved another boy and they got married several years later. I worked very hard in the hope of forgetting her since she got married. But I could not forget him anyway. I built an electric brushless motors factory when I was thirty years old and ran it wholeheartedly. I was still single at that time, because I could not forget her and hold another woman before I forgot her. I thought that I would like being single in my life if I could not encounter a woman that was as good as her. I came across a woman, who was the boss of another brushless electric motors factory one day when I was eating in a large restaurant with several friends of mine. I fell in love with her at the first sight. She was the second woman I loved in my life. I treated her to drink coffee in the bar near a powered bikes shop after the dinner. According to her, her husband had passed away several years ago and she did not remarry afterwards.

In the brushless motor, the original use of mechanical brush conversion is replaced by electronically controlled switching system. in the absence of mechanical wear, brushless motor addition to improving the life of the motor but also reduces the noise outside. Due to the cancellation of the traditional brush, brushless system is shorter and lighter. Moreover, brushless motor has better electromagnetic compatibility; it allows the vehicle digital systems to avoid interference operation. Brushless dc motor can be well applied to the cooling fan assembly. They can improve the efficiency of ten percent and they are about 400 grams lighter than conventional motor. When the vehicle is running at full capacity, there is a reduction of about 3 grams per kilometer of carbon dioxide emissions.

As brushless DC motor has simple structure, reliable operation, easy maintenance and a series of advantages like AC motor, it also with high efficiency DC motor, no excitation loss and speed performance and many other advantages, it becomes pervasive in today's economy field. More than a century, the electric motor as an electromechanical energy conversion device, its use has spread in all areas of the national economy and people's daily life. The main types are synchronous motors, induction motors and DC motors three categories. As the traditional DC motor’s brush adopt mechanical methods for commutation, and thus there is relative mechanical friction and result in noise, cremation, radio interference and weaknesses of short life and other weakness. Coupled with high manufacturing costs and maintenance difficulties shortcomings, which greatly limits its scope of application, resulting in the current industrial and agricultural production mostly use three-phase asynchronous motor.

During Shanghai International Motor Show, Hong Kong Johnson Electric motor launched the latest developments and applications of the car motor and drive system, including vehicle fuel economy drive solutions for environmental protection and enhanced vehicle safety and comfort products. Johnson Electric highlight its latest compact DC motor, this motor based on patented surface technology, you can reduce 35% motor weight in the case of maintaining the performance, making the size smaller and the power density greater. The reduction of weight can reduce fuel consumption, it providing an environmentally- friendly motor and drive solutions. It is worth mentioning that the performance of new products is achieved through the use of standard ferrite magnets. In addition, Johnson Electric also enhances the promotion of technology based on brushless DC motor drive energy efficient solutions.

My husband had been the vice leader of the Water Station of our local government for two years. He got promoted one day to the head leader of it one day and I jumped nearly to the sky when he called me and told me the good news. I was working in the dc micro motors factory the moment he called me and I was too happy to forget all people around me. I hummed after I hung my husband’s telephone. My colleagues asked me why I was so happy and I told them. They were also happy for me and congratulated my husband’s promotion. I rode my electric e bike and went to the vegetables market after work that day. I bought a lot of my husband’s favorite vegetables and cooked them for him. I called my daughter and my son-in-law to have dinner with us that night. My daughter and my son-in-law worked in another electric brushless motors factory that was not far away from mine. We drank a lot of beer and had a very happy time that night, because my husband could finally get promoted.

My husband had always been busy with constructing his new factory and corporation with a large company in Beijing for a long period of time. He did not go home during that period of time and lived in his office. I once wanted to visit him, but I dared not bothering him every time when I arrived at there on my gas powered bicycle, because I saw he was busy on his construction site. I only stood far away and stared at him without his knowing. I knew that he had gotten angry with me when I lent money to another person without negotiating and telling with him. I worked in my brushless dc electric motors and looked at our wedding photos after work every night. I felt guilty and wanted to beg for his forgiveness, but he did not listen to my explanation. I would ride the motorized bicycle and went to the construction site when I was not busy. I often prayed that he could understand and forgive me at that time, because I did not know he was going to build a new factory before I lent the money.

I volunteered to work in the new factory when my cousin was unpleasant to go there and went back. I thought it was a good thing for my husband and me to live separately for a period of time and so that both of us could think carefully about our marriage. My husband could not forget her old lover, who was the boss of a brushless electric motors factory. He often went to comfort her when he was in tears. He told me one time that he went to buy toothpaste. I went to the bathroom and found that the toothpaste had not run out at all. He had cheated me. I ran after him and found his electric bike bicycle at the river bank from a far distance. I went off my car and walked towards the river. I saw he handed the handkerchief to her old lover there. I was very sad at that moment and my tears could not help pouring down. I rode my Traxxas brushless motor and went back. I was hit heavily and several days later, I decided to go and work in the new factory.

I took a job in a large hotel as a manager assistant under the recommendation of one of my friends. I had many relatives and all of them hoped that I could get promoted in the company. In order to realize the wish, I rode my latest electric bicycle to the company and worked very hard every day. There was something wrong with our general manager’s right leg and he did not walk very conveniently. I wanted to cure her leg and learned a lot of knowledge about medical science on the Internet. My aunt worked in a brushless dc electric motors factory and she always asked me about the promotion. I could not bear and told my general manager the reason of helping him curing his leg one afternoon. I told him that I had a purpose of helping him and wanted him to help me getting promoted in the company. He laughed and promised me. I rode my motorized bike and went home happily after work that day. I told my parents that my manager was considering the matter of my promotion when I got home.

I opened a supermarket in our village and the income was not so bad. A neighbor of mine, who was also my best sister, often went to my supermarket and helped me looking after it when I was not free sometimes. My husband worked in his brushless dc electric motors factory not far from our house and he was able to enjoy a sumptuous dinner after he came back home from work every night. My daughter worked in the health center of our village and my son-in-law helped my husband in hisbrushless motors factory. They lived with us and were very filial. They often bought me and my husband clothes and shoes in the county. I felt I was the happiest woman in the world when we sat together eating dinners and I cherished the happiness very much, so did them. My daughter pulled me and asked me to go on her gas powered bicycle one day, saying that she wanted to take me to the county and go shopping with me. I had no way and asked my best sister to help me to look after the store.

I felt very boring one day and suddenly wanted to go to my husband’s work unit to have a look at him. I called my cousin and asked her to help me looking after my supermarket. She promised me without hesitation and arrived at there several minutes later on her bike electric. She was a straightforward woman and would help me every time I asked for her help. I wore my beautiful clothes and shoes and then rode my electric car and went to the city. I arrived at there twenty minutes later. When I was going to stop my ac brushless motorelectric car in the courtyard, the guard asked me who I wanted to find. I told him that I wanted to meet my husband, who was the leader of the government. He did not believe, saying that I was stealthy and did not like the wife of the leader of the government. He did not allow me to stop my power e bike in the courtyard and asked me to wait for my husband at the gate of the government. I got a little angry and it was the first time that I had encountered such kind of person.

I fell in love with a girl of our village when we went to the secondary school, but unfortunately, she did not love me and got married with another man several years later. I was hit badly the day they held the wedding. I went to work in a scorpion brushless motors factory was not interested in other women since then. I thought that I would no longer fall in love with another woman in my life except her. I could not forget her smiling; I could not forget her expression when she was speaking and so on so forth. I often rode my electric bicycle and went to look at her in her residential area. I wanted to ask her to have a talk with me every time when I arrived at there, but I dared not, because I was afraid that it would lead her husband’s misunderstanding. I thought that it had been enough I could meet her in the far distance, so I rode the dc geared motor electric car and went back home. I would be happy for her if she was happy and it was not necessarily that I get married with her.

I decided to go to find him one Sunday, although I did not know where he was and what he was doing, I believed that I could find him according to my intuition and my perseverance. It had been ten days that we had neither met each nor speak a word. I knew clearly that he would not answer my telephone as long as he saw that was my phone number. I wore my raincoat and got on my motorized bike and went to many places he frequented, but he was not at those places. I still did not lose my confidence when I could not meet him. Instead of going home, I went to his office and waited for him at the door. I stopped the power e bike at the door and stood there for more than six hours and prayed that he would come to his office and let me have a look at him. but he did not come. It was really very difficult for me to meet him. It was very cold that day and I could not help shivering. A man riding a velineon 3500 brushless motor electric car looked at me with a pair of strange eyes, but I could not care about it.

The founders of electric bikes made it their mission to provide their clients with the greatest selection of quality electric bicycles, electric scooters at reasonable prices to help save you, the client, time and money. Electric bikes virtually eliminated all of the headaches associated with owning automobiles. To sweeten the deal pedal assisted bikes are environmental friendly, fun to ride, and head turning. Now in 2011, they are offering us with 10 different pedal assisted models of ebikes. They have an electric bicycle ride for everyone; no matter we are young or old, the cautious or the adventurers, top athletes or casual riders. In their stocks, you can see variety of different electric vehicles. So if you are looking for going green and saving some green, you can choose them. And I also suggest that all of us should own a kind of electric bike.

We have introduced a completely new electric bicycle motor kit with more power and more range than any other bicycle motor kit on the market today. The unique brushless dc motor features an integrated planetary gearbox that significantly multiplies the motor torque. It uses the standard battery pack and can achieve 30 miles without pedaling and 40-50 miles with very moderate pedaling. The system is the first electric bike motor kit to work with the bike's rear derailleur to take full advantage of your bike's gearing system. The kit can be installed on bikes with 6 to 8 speed rear cassettes. The result is a motorized bike with great low gear power and a comfortable high-end cruising speed. It comes complete with a universal mounting bracket and all parts necessary to convert most standard or folding bikes to e-bikes with just a few hours effort. So it is so easy for you. Don’t you think so?

We are one of the professional brushless motor manufacturersthat located in Changzhou City, nearby Shanghai. The city is the production base of micro motors in China. The easy access to parts and materials allow us provide our customers with high quality products with very competitive prices. We provide advanced manufacturing and testing equipments, and 100% under controlled process. Our main products include low-high voltage dc brushless motor, hybrid stepper motor, PM stepper motor, geared motor and brushless dc motor. The products are widely applied in office automation, house-hold electrical appliance, audio and video equipment, medical instruments, automotive industry, and other automatic controlling systems as well. CE and ROHS products, over 90% are exported. We can make sure to you that our products are definitely with high quality. And also you can have your goods returned or repaired at any time.

Our electric bicycle motor adopts the new generation frame design of no slots which boasts the advantages of good timing ability, high reliability, no maintenance, no exchanging direction sparkle, etc. Furthermore, here are the advantages: firstly, the shell of the brushless motor adopts high technology material, light weight, and good ability of giving out heat at the same mechanism intensity; Secondly, adopting frames design, no alveolus effects, high efficiency, and little volume; Thirdly, the permanent magnet adopts high capability neodymium iron boron, so it decreases the volume and weight greatly at the same output power; Fourthly, the stator adopts import silicon steel, good pulling on magnetism, high efficiency, so it lasts the aviation time; Fifthly, it adopts import high speed bearing at forward and backward respectively; low noise; long life time. NOTE: Use only when the special motor controller suits to the brushless motor.

From product design, manufacturing to customer service, our company always holds the spirit of profession and responsibility to provide customers with completed service. And now it is well accepted. Due to the upgrading of domestic tool machine, our company developed a series of components to meet the demands of tool machinery factories, such as brushless motor, D.D motor and build-in spindle motor, etc. In the aspect of industrial machinery, we also built a series of induction servo motor to accommodate the demand of industrial machinery, including cutting machine, printing machine, and paper cutting machine, plastic injection machine, brass and steel processing machine. Though we are still a small company, we can offer many other kinds of electric bike kits such as e bike controller, rc motor, etc. So you can have a very wide choice in our company. And of course we will offer you good service.

Basically, an electric motor’s only job is to convert electrical energy into mechanical energy, like the turning of a propeller or rotor blade. There are two basic facts that allow electric motors to work: Electric and magnetic fields are related. That is to say, every moving charge produces a magnetic field, and magnetic fields can produce electric charge. Magnets Interact – Magnets will align when placed near to each other. All brushless electric motors basically consist of two magnets. One of them is permanent, the other is a coil of wire that, when charged, becomes a magnet. The motor is designed such that the magnetic fields produced by each of the magnets are always out of alignment, causing the brushless motor axil to rotate. This is similar to what happens when you hold a permanent magnet to a compass – the compass swings position so that it lines up with the magnets field.

My husband asked my cousin to manage the new branch factory of dc brushless motors when it was newly established. He was unpleasant to go at that time, because it was a little far from his house, but my husband could not find a more suitable person at once, so he had to submit to the arrangement unhappily. He came back several days later, telling to my husband that he could not stay at the new factory anymore and strong demanded repatriation. He rode his 12 volt dc motor electric car and left my husband’s office angrily, because my husband had not complied with his demand. I knew that he was stubborn and a quick temper man, so I said nothing when he was in the office. He came to my husband’s office again the next morning. He stopped her wife’s diy electric bicycle at the courtyard and rushed into the office, saying that he would rather resign if my husband did not promise his repatriation. He was too childish and did not understand other people’s feelings sometimes.

It was August when I arrived at the city and it was the hottest time of year. He had vanished into the thin air when I got the railway station, coupled with the hot whether; I really wanted to die at that moment. It was a heavy blow for me to encounter that kind of thing and I thought any person coming across it was also unable to endure. When I saw a pair of boy and girl riding a brushless ac motor electric car after I came out of the station, I could not help crying. I threw my luggage onto the ground and sat on a chair. I sobbed and did not know how I should do. I did not know to whom I should tell about my matter. I was afraid of being criticized. I could not bear the noises of dc motors and all kinds of cars in the streets anymore three hours later. I carried my baggage and found a small hotel. I still lost my control of crying when I was lying on the bed that night. I had no way and worked in a motorized bicycles store several days later. The only thing I could do was to learn to be strong.

Road Group established Ningbo Chi Cheung Electrical and Mechanical Equipment Co., Ltd., in 2008; the company specializes in R & D servo motor and motor controller, it provides supporting services for its "double-horse" injection molding machines and other customers to, the company has achieved mass production, and the sales increased steadily. Beilun Granville Electric Corporation cooperated with Zhejiang University, they apply the servo-saving technology into the medical equipment, food machinery, packaging machinery and other fields, which rejuvenated the old enterprises founded in 1993. Beilun District Enterprise is accelerating the pace of innovation of servo energy-saving technology to improve the development of the servo control system that drives. Recently, Ningbo Haitian Group has specially set up Haitian driver Ltd. to provide servo-saving system for each industry.

In the servo system, AC permanent magnet synchronous motor has become the mainstream choice of servo system with its very good low speed performance, high-speed field weakening control, wide speed range, high dynamic performance and efficiency. Currently, permanent magnet synchronous AC servo technology has become one of the supporting technologies of industrial automation. Take Renesas 32-bit MCU V850E/IX3 UPD70F3454 high-performance MCU Renesas developed for 32-bit frequency control. For frequency control, UPD70F3454 provides two group six-phase PWM output, independent 12-bit AD converter, built-in comparator and op amp, two encoder input counter, they highly integrated peripherals equipments servo motor controls required, all of these components can achieve a MCU that can to control two servo motors.

There are lots of advantages that use stepper pulse to control servo motor. 1. High reliability. When servo motor was controlled by analog voltage mode, if there are the wrong cable connected issues or the component damage problems, the control voltage is possible to reach positive maximum. This situation is very dangerous, but this kind of problem can be prevented If take the pulse as control signal. 2. High signal interference performance. Anti-jamming performance of digital circuit can not be catches up by analog circuit. Of course, thinks to the limitations of servo motor driver and motor controller, there are also some weaknesses in performance to use pulse mode to control servo motor. One is that Pulse working way of servo driver can not separate from the location work, the other hand is that the motion controller and driver how to use a high enough pulse to delivery information.

Servo technology allows the system to carry out the movement follow with the external instructions that people expected, it can minimize the losses and achieve the energy saving effect. The early 21st century, in the international market, stable, fast, precision AC servo technology is gradually get matures; many foreign brands are entering into the Chinese market. However, domestic enterprises that can independently research, develop and productservo motor are not many. Beilun District, as the industrial park of high domestic advanced equipment manufacturing industry, it earlier sees the future development trend of industrial automation servo motor controller technology, some began to explore the road of independent innovation companies with keen eyes. Domestic injection molding machine is a giant Haitian Group among them.

AKM 8 series servo motors was new servo products launched by Kollmorgen in January 2011, this is series of new field-proven AKM motor products marketing globally, rely on an underlying hardware to meet the general requirements of the great features, AKM8 series servo motor provides higher torque density, compared to other similar standard motor, their case is 30% shorter than those products from other providers, it also covers the most wide torque / speed range. Therefore, the machine manufacturers can reduce the machine size in the case of without sacrificing the product performance or choose the length of a larger stack to achieve higher performance without having to make major changes to the motor controller. AKM high performance motor series can provide a broad range of connectivity, feedback and other optional features. With AKM8, now there are 8 rack sizes, 28 frame / stack combinations and 112 'standard' windings are available. They can provide unprecedented choice and flexibility forclients.

All of Kollmorgen AKM series servo motors are characterized by strong integration case, winding sealed to maximize good thermal isolation cable, even though in the most demanding application environments, the products also can provide durable performance and life, it provides high-resolution feedback options of high performance / accuracy or market standards for the harsh environment, Including Endat, motor driver, BISS, Hiperface, rotary transformers and so on. the winding voltage is applied to all standards in the world, the DC 75 volts and AC 120,240,400 and 480 volts, the wide selection range can meet extensive application requirements. AKM motors also can coordinated with the Kollmorgen Company’ AKD Servo drives to take form a perfect matching of high-performance servo systems. AKD is a series of Ethernet-based servo drive,they can quickly and easily integrate into any application.

When I was boring and had nothing to do at home one Sunday, I received one of my friends’ short messages, visiting me to play with him in his dc micro motors factory. I was going to collapse staying at home and promised him without hesitation. It was cold that day; I put on my thickest clothes and shoes and went out. I hated crowding a bus the most and felt crowding the bus was a one of tragedies in the world. So I rode the new electric power bike I bought with my two months wages to my friend’s factory that day. The wind was so vicious that my head ached and I could not nearly endure it. Fortunately, the factory was not far from my living place and I got there thirteen minutes later. It was the first time I went to there, so I stopped the electric bicycle and took my mobile phone and dialed my friend’s number when I arrived there. I wanted him to pick me up, because I did not know his specific location. I was disappointed when I called him and there was nobody answered my phones. I was cheated.

Kollmorgen AKM Servo series is ultra-high energy efficiency solutions, the customers of them usually can recover costs within a year, especially those in high dynamic applications. Synchronous servo motor Kollmorgen provides has reached new IEC 60034-30 standards for the highest energy efficiency rating class IE4. in comparison with the traditionalinduction motor, they saving average of 30% energy, Compared with traditional synchronous servo motors, their efficiency is even better. If use the general Kollmorgen AKD Servo motor driver and Kollmorgen AKM Servo together , then the AKM products can further improve the energy balance-this servo system can reduced 40% or more energy demand, each axis can save 1,000 euros per year.

Closed loop servo system is also subordinate to CNC machine tool servo systems; closed loop servo system is composed of Comparison links, servo motor driver amplifier, feed servo motor, mechanical transmission and integral linear displacement measuring device. The system has detection and feedback correction function on the amount of movement of the of the machine movement components, it adopts DC servo motor or AC servo motor as the drive components. It can directly use the grating installed in the table or induction motor as the position detection device to constitute high-precision closed loop position control system. . Linear displacement detector of the system was installed in the moving parts; its accuracy relies on the accuracy of displacement detection devices and sensitivity, the process precision it produced is relatively high. But many nonlinear factors have a significant impact on system stability such as the mechanical transmission device stiffness; friction damping characteristics, Backlash etc. these factors make closed loop more complex to install for servo system. Therefore, this system only used in high precision and large-scale CNC machine tools.。

Semi-closed loop servo system is the mostly used system in CNC machine tool servo systems; Semi-closed loop servo system works the same with closed loop servo system, it similarly uses stepper motor as motor driver like closed loop servo system, you can use the pulse motor installed in encoder, brushless resolver or tachometer generator works as the position / speed detection device to form semi-closed loop position control system, The feedback signal of the system get from the system or screw on the motor shaft, Feeding system in the mechanical transmission device is outside the feedback loop, the nonlinear stiffness has not influence on the system stability, installation is more convenient for the operation. Machine tool’s positioning accuracy has relationship with the mechanical transmission precision. In the case of non-high precision transmission, compensation function can be used to improve the accuracy of the process satisfaction. Therefore, semi-closed loop servo system is widely used in CNC machine tools.

Accurate, precise and rapid positioning is the basic concept of the servo, variable frequency is a necessary internal links, and there is also variable frequency in servo motor controller (to be variable speed). However, the current loop servo-loop speed or position control loop is closed to control, this is a big difference. In addition, construction of the servo motor and General Motors is different, it need to meet the requirement of fast response and accurate positioning. AC servos in circulation now mostly are permanent magnet synchronous servo motor, but the motor was limited by the process, it is highly difficult to make large power motor, the power more than a dozen KW synchronous servo’s price is expensive, so in the case of field application, AC induction servo usually will replace servo motor.

Since I fell in love with him, I would begin to miss him if I did not meet him for a week. I could not know how to express that kind of mood. I would have no mood to do anything before seeing him and would become very active towards everything after I met him. I knew he was busy and did not want to disturb him, so I would ride my maxon motor electric car and went to look at him every weekend. I only wanted to look at his eyes and face. Meeting him did not necessarily mean doing what and I only wanted meet him and I would be content if I could look at him for a few minutes. I would have passionate in the electric powered bicycles shop from Monday to Saturday if I could meet him at weekends. Maybe that was love and I could not tell about it clearly. That kind of feeling was really subtle. I asked him to go to our store and buy a motorized bicycle, only to have a look at him. Would you have the same feeling as me if you fell in love with a person?

Sam was one of my ordinary friends. He was born in a poverty family and worked out when he was only eighteen years old. I stayed at home everyday and had nothing to do after I graduated from the technical school. When I was boring to death, he appeared on the Internet and often sent me messages. He told me that he worked in a micro brushless motors factory and could earn a lot of money. He always asked me to go there working together with him and was refused me every time, because I did not believe working in a factory could earn much money. He was so firm in persuading me that I was a little shook one day. I rode my motorized bicycle and turned to my friends to ask them to give me advices one day. They persuaded me not to go there, because they were afraid of being cheated, after all, he was not my good friends and I was not very familiar with him. I rodethe electric bicycle and returned home disappointedly that day. I was very confused and did not know how I should do.

It had been a month that we did not meet each other. I knew that he had gotten angry and did not want to speak to me, but I had never expected that he should have had gotten angry for so long .The last time we met was at the gate of a advanced dc motors factory. He handed me money; I did not take it and asked him that why he did not want to talk with me and even if only a word. He repeated that his aim was to send me money and did not have any word to say to me. I did not know why my tears poured down immediately at that moment. I turned away and rode my electric bike bicycle leaving there. I regretted soon after I left there. I went back, but he was not there anymore and I could not see his shadow. I could not control my tears and cried loudly. The passers-by saw me crying and cast strange eyes on me. I wanted to get angry, but there was no object, so I pushed the motorized bicycle onto the ground. It was the first time I cried for so long. I stood in the wind and the wind had dried my tears.

Yesterday was my husband’s birthday. In order to celebrate it, I called my sister-in-law and asked her to help me to look after our snack bar for several hours. I rode my electric bicycle and went to the vegetable market and bought a lot of vegetables, such as tomatoes, potatoes and so on so forth. We had gotten married for twelve years and I had forgotten his birthdays for three times because of making money in the snack bar. I felt very sorry. My husband worked in abrushless servo motors factory before I got married with him. He felt tired in the factory and changed another job in a company afterwards. To be frank, he was a good husband. He had never smoked and drank occasionally. He was responsible and upright. He had never lost temper in front of me and our son and cherished our marriage very much. I rode the motorized bicycle after I finished going shopping and went home happily. I cooked all his favorite food for him and gave him a present.

There was a little misunderstanding between my wife and me on the matter of borrowing money to build a branch factory of brushless dc motor controllers. She lent money to another friend of hers without negotiating and telling me, so I got angry. Another woman helped me to solve the problem of the capital and I was able to build the factory in the end. The woman was only one of my ordinary friends, but my wife did not believe and suspected that the relationship between us was abnormal. I rode my father’s e electric bike and went to her office to invite her to take part in the ceremony of my new factory one night. When I arrived at there, she was watching a funny video with one of her colleagues. I felt very embarrassed and turned away quickly. My wife ran out of the office and stopped my motorized bicycle. She explained that she had been searching some information before I arrived at there and hoped me not to misunderstand. As a matter of fact, I believed her and had never suspected her.

In distributed servo system, the quality ofmotor controls performance and the coordination control performance between multi-motors has a direct impact on the quality of the production process. How to achieve efficient management system, to facilitate the application and real-time control are key issues to be resolved. CAN bus is an effective support for real-time control of distributed control or local area network of serial communication, of a it is ideal for data communication implementation of distributed servo system with its simple structure, high reliability and low cost advantages. Through CAN bus to Data’s transmission and control can make the performance of the servo motor is more stable, better and more flexible applied to distribute in motion control system.

The subversions of stepper motor control in essential is through controlling the stator winding current to make the synthesis magnetic field in stepper motor internal changing with some requirements, so as to achieve Stepper motor’s sub-step angle. Generally speaking, the magnitude resultant magnetic field’s vector determines the size of the motor rotation torque, the angle between the two adjacent syntheses magnetic field vector determines the step angle size. Three-phase hybrid stepper motor’ work principle is highly similar to the permanent magnet synchronous servo motor. The permanent magnet rotor used also is high-density characteristics rare earth permanent magnetic materials, Therefore, the induction currents the rotor produced are negligible to the rotor magnetic field. It is equivalent to multi-polar f permanent magnetinduction motor in structure.

Servo motor can be used in the places that will be affected by the invasion of water or oil droplets. Therefore, the servo motor should not be placed or used in water or oil intrusion environment. If the servo motor connected to a reduction gear, fuel it should be sealed when use the servo motor so as to prevent the reduction gear oil entering into the servo motor. At the same time, Servo motor’s cable can not immersed in oil or water. When the servo motor is moving, the cable (that is configured with the motor Flanagan) should be firmly fixed to the stationary part (relative to motor), and the additional cable should be installed to extend it, thus can minimize the bending stress. The application of servo motor is more common than stepper motor.

Direct drive servo motor is a kind of special brushless permanent magnet servo motor. It can be regarded as a circular linear motor or the servo motor with a large number of poles. Thinks to with a considerable number of poles, direct drive motor can provide high torque at lower speed., generalinduction motor with higher speed and smaller torque compared with direct drive servo motor. Direct drive servo motor can supply lower speed and greater speed. In comparison of the traditional induction motor, the main parameters of direct drive servo motor is torque rather than power. Take plastic extrusion machines, circular looms for example. Extruder gearless direct-drive servo motor drive system can replace the gear box to save equipment costs, reduce noise and improve dynamic response. Circular loom direct drive servo motor drive system is the world's first one who was developed out. It can achieve good energy-saving effect.

My sister-in-law attended a technical school after she graduated from high school. She encountered my brother there and fell in love with him at the first sight. My sister-in-law firmly believed that my brother was her other half in her life and ran after him tightly. She sent him on her e electric bike and helped him doing house work every day after school. She was so firm that my brother promised her in the end. She was appointed to work in our local government as soon as she graduated from the school. My brother had no formal job and was only an ordinary worker in an electric brushless motors factory. My sister-in-law did not mind and still loved him and they got married two years later. My brother rode his old stepper motor electric car to work every day. Our neighbors admired my brother and parents very much having such a capable and virtuous wife and daughter-in-law. It was indeed my brother’s blessings that God bestowed him the woman.

My male relative had been the vice director of our village for three years and in order to get promoted, he asked me to go to the government to run behind our village director’s back and said that he was incompetent to be our village’s leader. I was helpless and dared not to go. I rode my latest electric bicycle and went to the county. The mayor was not in the government when I arrived at there. I waited for him in the courtyard. The guard did not allow me to stay there and asked me to go outside. I got angry and quarreled with him. The courtyard was not his house and why he did not allow me to stay there. I got on my motorized bicycle and went out angrily. It was the first time that I had seen that kind of unreasonable person. The mayor had not returned until 12 o’clock. I was hungry and went to have lunch near a scorpion brushless motors factory. My male relative warned me that I must wait for the mayor if he was not in the government. I remembered and continued waiting for him after lunch.

My mother taught me that a person should learn to be independent and strong since I was a child, and I remembered her words from that time on. I was born in a poverty family. In order to pay for our tuition fees, my parents worked very hard from morning till night every day in the scorpion brushless motors factory. But they lost their jobs suddenly one day because of the collapse of the factory. It was more difficult for them to pay for our fees and the burden on their shoulders became heavier and heavier. My mother was anxious with the coming of new terms of all of us. She went to my uncle’s house in the hope of borrowing money from him. My uncle was one of bldc motor controller suppliers at that time and my mother thought that he could help us. To her surprise, he said that all his money had been lent out and he was helpless. My mother rode her old electric tricycle and left there disappointedly. When she got home, she told me that I must study hard in school and earn a lot of money in the future.

My girlfriend suspected that I had affection to one of my female colleagues and often went to our unit to supervise me during working time. I hated being supervised the most since I was a child, so I got very angry when she rode an electric e bike and went to our company to look at me. She told me that it was not supervision and she only visited me by the way. I insisted that she was and warned her that I would be unhappy if she continued behaving like that one day. She said that she would no longer visit me if I did not like and left there unpleasantly on her hub motor electric bicycle. I knew I was overdone and had said sad words to her. I hurried out of the company and ran after her. She rode the car so quickly that I could not catch her. She did not speak to me for several days after that day. She stayed in her brushless motor controllers factory during working time and according to her colleagues, she was absent-minded all day long. I was also uncomfortable after seeing her like that.

My elder brother got married with my sister-in-law when she was only twenty years old. He was not very rich, but kind and honest. It was my sister-in-law’s blessing that she could encounter my brother and every villager admired them very much. My brother was the office director of an electric hub motors bicycles factory and was very popular among the employers, because he had never shouted them and often made jokes with them, just liked their own brother. He never lost his temper and I admired his attitude towards life very much. He rode his diy electric motorcycle to work every day, saying that riding it could make his body stronger. My brother was a thrifty man and had never wasted a penny on unnecessary things. I told him one day that he should buy a car and so that he would need not ride the old brushless motor electric car to work anymore. He said that it was unnecessary. More importantly, a car would pollute the environment we lived.

My cousin had lived in the city for twelve years and had bought two large houses in the downtown area. He was a software engineer in a company and ran many other businesses outside. His wife was the vice manager of a factory, which was one of brushless motor manufacturers and had a lot of matters to deal with all day long. Everybody knew them admired them very much. My cousin asked me to work in his wife’s factory after I graduated from the university, but I was unpleasant to go there, because I wanted to rely on my own ability to find a job. I rode my electric e bike when seeking for a job in the city and was admitted by a large company in the end. I always believed that hard work would pay off. I wanted to be independent and did what I wanted to do. I did not like other people arranging my life for me. I went to work riding my motorized bicycle joyfully. I liked to be a person freely and liked the feeling of being free and relaxed.

I went to the health center of our village to return the plate to my colleague one night. When I arrived at the door of the center, I heard my colleague cursed me, saying that I was a villain and many other sarcastic words when she was calling her husband. I stopped my hub motor electric car and entered into the room angrily and asked why she was cursing me. She said that she was playing with her husband. I thought they were out of their minds. I called her husband and asked him what the matter was. He told me that he did not believe me and was afraid I harassed her wife. I got angry and rode the electric bike bicycle leaving there. I thought no matter how he did not believe me, he should not have asked her wife to curse me. The behavior was wrong. More importantly, I was innocent and did not dare have any thought on her wife. I fell down from the brushless motor electric car on the way to the bar of my friend’s. It was the first I was so sad and my self-esteem was injured deeply. I was not that kind of person.

I was the youngest child in our family. I had an elder brother and a sister and they were very fond of me. I felt I was even spoiled by them sometimes and I had developed a habit of squeamish. My sister and my brother-in-law worked in the same electric brushless motors factory and had built a three-storey house in our hometown and lived a very happy life. When I said I was in lack of money, my elder sister would transfer it to me the next day without hesitation. She was a person of quick temper and an open-minded woman. She was my idol. My elder brother did bldc motor controllers in a factory for ten years near our house. His personality was on the contrary to my sister’s. He was a calm man and did not talk too much and I had never seen him losing his temper in front of me. I asked him to buy me a gas powered bicycle one Saturday, he said that he had no time and would buy me one the next Sunday. He kept his promise and took me to the store to select one on that Sunday.

I was addicted to playing cards and for this reason divorced by my husband when our baby was only one year old, cursing me that I was an incompetent mother and only knowing to play cards all day long. I knew the serious result when I was divorced and regretted very much. In order to punish myself, I used the cigarette to burn my arms. My husband was the boss of an electric brushless motors factory and seldom had time to take care of our baby. His mother was old and so we treated a baby sister to look after the baby. The baby was down with high fever one night and I was playing cards when he called me and asked me to ride the best electric bike home as quickly as possible and took the baby to the hospital. I promised and hung his phone. But I was fascinated that I forget about it and I powered off my phone. I played cards till three o’clock in the morning. When I walked towards my motorized bicycle, I suddenly remembered my husband’s telephone and my baby. I knew it was late and I had finished.

My sister-in-law fell in love with my elder brother when she attended high school. She was a beautiful girl and was born in a rich family. My elder brother was not handsome and was born in a poverty family. I could not understand why she loved my brother so much. She followed my brother home riding her latest electric bike every day and my brother’s face would be red every time she ran after him. She still pursued him when my brother ran quickly. Many of their classmates laughed at them. My mother said to her one day that her father was the boss of an outrunner brushless motors factory; we were poor and did not match her. But she was so firm that nobody could persuade her not to run after my brother. I did not know where his charming was. She still rode her motorized bicycle and followed my brother to our house every day after school. Maybe love was so strange sometimes. There was no reason that people falling in love another one. They got married five years later.

Time had passed so slowly since I could not see him for a month and I would be very happy if I could see him for one time. He was unpleasant to meet me and I had no way. I only felt I was extremely sad when he said that he had nothing said to me at the door of the electric brushless motors factory one day. It was the first time that I had seen such calm and good-tempered person. I was so anxious to see him, but he was so indifferent. I could not bear and was nearly driven mad, but he was still so calm. I turned round and went into the advanced dc motors workshop. I really admired his calmness. I wanted to get angry in front of him, but I could not. It was a harmonious society and I did not want to make our relationship stiff. I rode my best e bike home after work and I had been thinking what he was angry. I really did not figure out and he had become more and more elusive to me. I hoped we could be as good as before one day, so I could not go angry, I had to tolerate and calm down.

There had been a lot of things went wrong with me and I was afraid I could not overcome the difficulties. He betrayed me and I could not accept the fact anymore. I was a person of heavy feeling and as long as I fell in love with a person, I could not extricate myself from it. My Kllmorgen brushless motor had been broken and I needed to buy a new one, but I was lack of money. When I was sad to the extreme, the doctor told me that I was down with cholecystitis and I had to have an operation as soon as possible. How should I do? I did not know. He had promised to buy me the best electric bike very long ago, but he did not buy it. I was disappointed and did not want to ask his help anymore. But there was nobody except him who could help me at that moment. I dialed his number and he answered, saying that he was busy in his bicycle electric motors factory and then hung my telephone before I asked for his help. I sent a short message to him, but he did not reply. I called him many times afterwards and he did not answer.

The world’s earliest Prototype motor is permanent magnet electrical motor, but because the performance of permanent magnetic materials in that time was poor, so electromagnetic motors have been accounted for the mainstream. The birth of Alnico permanent magnet made the permanent magnet motor to start the advent of development, but because of its relatively high price, the application surface of Alnico magnet motor is not widespread. Since the emergence of low-cost ferrite, the application of permanent magnet motor substantially increases. According to statistics, among DC motor below 500W, the permanent magnet motor accounts for more than 92%, most of which is ferrite permanent magnet brush motor. The emergence of samarium cobalt permanent magnet makes high-performance servo motor to be achieved.

Sam knew a lot and many of his friends often consulted him about all kinds of problems and he would give them satisfying solutions. He was one of my best friends and I often asked for his help when I came across difficult problems. He was the leader of the brushless motor controllers workshop in a factory. He was so outstanding that he had become the object of admiration of many ladies and was very popular among them. Every woman wanted to find an excellent gentleman and stay with him all her life. There was no exception to me. I worked in a brushless dc electric motors factory. I had been attracted by Sam completely and he was my ideal husband. How I wished he had not gotten married and then I would have the opportunity to run after him. I rode my diy electric bicycle home after work every day and began to image the life I stayed with Sam. But I had no chance to live with him in my life. He was the standard of my seeking a boyfriend and I would find one like Sam.

My heart fell into the ice through ten thousands of years when he said that he would no longer take care of me and I could do everything at my random one day. That was not his previous style and he had always spoiled me very much before and why he should have said such sad words to me that day in the electric brushless motors factory. I would not be used to being taken care by without him. I liked him to give me advices when I encountered troublesome; I liked him to ask where I was after I got off work; I liked him to ask me whether I had had dinner. I often stopped my power e bike at the roadside and bought a dessert from his snack bar after work, because I could meet him there. He ogled to me and smiled, I smiled too. I was content very much. I rode a hub motor bicycle of my colleague’s home one day, but I did not see him at his store and kept on bothering him by calling him and he was disgusted with me finally and said those words to me.

When the electrical motor working, the coil and commutator rotating but magnet and brush does not turn, the turning changes of the coil current direction is completes by the motor commutator and brushes of motor rotation. There are the clarifications of sub-high-speed brush motor brush motor and low-speed brush motor in the electric vehicle industry, a lot of difference between Brush motors and brushless motors can be seen from the name, brushless motor brush without any carbon brushes. The main components of Brush motor are stator and rotor, there are poles on the stator (windings or permanent magnet), and the rotor has windings, there will be a angle between the stator and rotor magnetic field (N pole and S pole between), under the mutual attraction of the stator and rotor magnetic field, which is the stator and rotor magnetic field. After changing the seat of the brush you can change the direation of the angle between the stator and rotor pole, so as change the direction of motor rotation.

The another name of brushless DC micro-motoris orthogonal systems, which is converted direct current into alternate current, AC inverter is working here in DC Chopper. Brushless DC micro-motor is the composition of synchronous motor and motor driver; it is a type of typical mechatronic product. Brushless DC micro-motor position sensor code to power the two-phase winding axis position ahead of the resultant magnetic field axis of the rotor position of the magnetic field, so wherever the starting position of the rotor is, the motor in starting moment will produce large enough starting torque, thus it is unnecessary to stall start winding. Brushless DC micro-motor overcomes the congenital defects of brush DC Micro Motor, to take electronic commutator to replace the mechanical commutator.

High-performance form and economic form are the two major development directions of Permanent Magnet DC brush motor, the so-called economic type mainly refers to the micro dc motor stereo audio-visual equipments used, such as various tape recorders, video recorders, music centers, record players, music players, radios, CD player, digital laser player and car audio and more. The features is the number is huge and the price is very cheap, each one just worth a few dollars each. Mabuchi of Japan is the world's most productive economic Permanent MagnetDC Motors Company, the annual production evenly up to bullions of sets. However, due to appreciation of the yen, Japan domestic basically stopping product this electrical motor, most of them are transferring to mainland China and Southeast Asia.

Our company specialized in the business of electric bikes. You can see various electric bikes on the web of our company. Our company is a specialized ebike company. Except the whole ebikes you can buy from our company, there are various kinds of electric bike kits we can offer. From brushed motor to brushless motor, from ac motor controllers to dc motor controllers, we can offer all you want. And also you needn’t worry about the quality of our products. All of our products are made in the foreign high-techs. We also offer after-sale service. If you do have problems, just call the telephone number of the after-sale service agent in our company. We will arrive to you as soon as possible to solve your problems. We also promise if you don’t satisfy with your product, you can return the goods or change it into another one in 10 days after buying. All in all, we will offer the best electric bikes and electric bike kits with our best service.

Everyone have a lot of dreams. I’m also not the exception. I have a variety of dreams such as being a teacher when I was young, being a scientist when I was in the primary school. In my dreams, there is a very special dream --- making a diy electric bike. Maybe you will feel this is strange. Maybe you are thinking I’m joking. No, I’m serious. When I was young, I loved making. Why do I choose to make a diy electric bike? Because I think ebikes are benefit for our environment. If I can improve some shortcomings of the ebikes, there will be many more people choose to buy an ebike. The slow speed of ebikes is the biggest disadvantage of ebikes. So I decided to start from the improvement of the electric bike motors. By improving the motors, I think the ebikes’ speed will be raised.

Yesterday was one of the worst days in my life. Why? Let me tell you how bad it was. In the morning, I felt it was a sunny and even hot day, so I drove out to have the gathering with my electric bike. So I didn’t take anything in case of raining. When I was driving the half way, the weather has been windy but the sun was still shinning strong. So I didn’t care. After the most half way, the dark clouds came. So I planed to drive fast. However, when I raised the speed, I found the electric bike was nearly out of electricity. So I had to drive it slowly so that I could reach the destination. And also I was praying not rain so fast. However, it rained when I was on the way. So I was soaked and finally got cold. And my ebike also got trouble. Because of also being soaked, some ebike kits went wrong and I should pay for the damage.

Now I have already been a graduate from my university. Four years are not a very long time by comparing our life, but also not a short time. I still remember first time I entered into this university. When I first saw this university, I felt it was so large and my mum had the same feeling. So she decided to buy a vehicle for me. Then I had an electric bike. That was really a beautiful bike. I love it very much. It companied with me for the whole four years. When now thinking of the past days, I felt very happy. I remembered one rainy day, that I drove my bike to the library. Unfortunately, the bike suddenly didn’t work. I pulled my bike in the pouring rain. At last, I sent it to the repairer. He said there was something wrong with the electric bike motor. After repairing, my bike went on working. In the following years, the electric bike kits had many other problems. But I never gave it up. It had already been my friend.

Now, with the popularity of electric bikes, more and more people choose to buy this kind of bikes. The main reasons for buy these are two: environment friendly and lower price. Maybe now the lower price has become the only the main reason for the e-bikes’ popularity. It is a common sense that quality decides the price. So it is true for electric bikes. The electric bikes of high quality are often of the high price. The electric bikes, though look like, the inner bike kits are not like especially their motors. The kinds of their motors are various. There are brushed motors, brushless motors, etc. Different motors with different characteristics, and also their life spans are different. There is also a lot of knowledge about electric bikes. So after you make a decision to buy electric bikes, you should find more information

The coexistence of human beings and environment as well as the sustainable development of the global economics are the same pursuit of us. So we should find ways of low discharging and making full use of resource. One of the best ways to do this now should count the e-bikes. Modern e-bikes are the whole of electric power, electron, mechanical control, material science, chemical techniques as well as some other high-techs. The function and value of e-bikes all depend on the battery as well as the motor driver system. The driving system can be divided into four parts: controller, power inverter, motor and sensor. In recent market, the motors are usually dc motor, sensor motor and also brushless motor, etc. All of these can decide the total value of e-bike. So if you buy an e-bike at low price, you will get the low quality electric bicycle kits.

My factory director opened another branch and there was nobody to manager it; he could not find a suitable person and asked me to work there. I did not want to go at all, because I did not want to separate from my wife and it was the first time we lived separately. The factory was a brushless dc electric motors factory and I was very busy and tired after I was asked to work there. The most tangled thing was that I could not go home and meet my wife every day. I had several sleepless nights and my brain was filled with my wife. I could not bear living separately. I went home and rode my electric powered bicycle to tell my factory director the matter. I said that I wanted to return back and if he did not agree with it, I would like resigning the job. He asked me to work there for another month and he would try his best to find a way out. I got angry and rode the motorized bike home angrily. He did not know my personality and I would do everything as long as I wanted to do.

Stepper controllers drive the motor with much higher voltages than the motor nameplate rated voltage and limit current through chopping. Stepper motor controller is kind of electronic products that can sent out uniform pulse signals, after the signal enter into the stepper motor, it Will converted into the high current signal that when the motor driver convert into the stepper motor drives needed. Stepper motor controller can accurately control the stepper motor turn every angle. The object the driver received is pulse signal, each pulse the driver receives, the driver will lead to motor around a fixed point of view, because of the characteristics, the stepper motor are widely used in various industries at present.

Stepper controllers drive the motor with much higher voltages than the motor nameplate rated voltage and limit current through chopping. Stepper motor controller is kind of electronic products that can sent out uniform pulse signals, after the signal enter into the stepper motor, it Will converted into the high current signal that when the motor driver convert into the stepper motor drives needed. Stepper motor controller can accurately control the stepper motor turn every angle. The object the driver received is pulse signal, each pulse the driver receives, the driver will lead to motor around a fixed point of view, because of the characteristics, the stepper motor are widely used in various industries at present.

Brush’s wear also are connect with the current size of the brush on silver content. The current of series motor Freight three vehicles used is large, the life can not exceed 2000 hours, it would have to be replaced once a few months, the amount of silver of Brush’s prices vary greatly. There are only two connections outside on brush motor, at once as the permanent magnet brush motor switch the connections, it can change the direction of rotation; series motor without permanent magnets, rotor and stator also are windings, of which the stator magnetic field also called excitation magnetic field, but the winding is independent, when used in tandem, it has other name- series motor. Although the series motor also have two outside connections, it different from the exchange of permanent magnet brush motor can that can change the direction of rotation of the connection. Brushless motor, as its name imply, it has not brush inside, Winding current brushless conversion is carried out by an external controller (later referred to brushless motor controller). However, the brushless motor must provide rotor position for brushless motor controllers.

Motor controllers can be divided into manually, remotely and automatically there operation types. They may include only the means for starting and stopping the motor or may compose of other functions. Electric motor controller can be classified by the type of motor, such as ac servo motor, dc servo motor, Permanent magnet synchronous motor and more. At the same time, motor controller is connected with the power source closely, such as battery pack or power supply. Small motor controls can be switched on through simply plugging it into an electrical receptacle or by using turn on the switch or circuit breaker. Larger motor requires specialized switching unit. After energized, a direct on line (DOL) starter immediately connects the motor terminals directly to the power supply.

CNC programmable stepper motor controller and stepper motor driver and stepper motor can form a complete control system which can control three stepper motor controller using a computer time-sharing running this type of programming language, with input, output, counting and other instructions. It with the characteristics of programming flexibility and wide using range, it also can be widely used in the field of automation control. This product consists of intelligent power modules, excellent cooling system, reliable power supply control system and closed-loop feedback control system optimization component sampling. It has fast response, control and stable operation, maintenance-free characteristics.

The advantages of brush motor is that although it is trouble to manufacturing, the technology is ripe, the accessories is easy to purchase, and the supporting brush speed control (also referred to brush controller) is cheap; the advantage is that after the electrical motor wear seriously, you need to need to open the motor cover for replacement. The replacement of Brushless motor without the opening the cover problem, it is more power-saving than the brush motor in theory; the disadvantage is that the matching brushless motor controller is much more expensive, and the failure rate also is rather high. But since late last year, there are significant decline in the price of brushless controller, and the quality also get improvement.

Permanent magnet motor is divided into two major categories of brush motor and brushless motor. DC continuous rotation is depending on the rotor and stator magnetic repulsion of the magnetic field of the same sex, opposite sex attraction. The current in line package must be converted in the appropriate machine; otherwise it will suck and refuses to turn. Brush motor complete automatically by the motor commutator (scientific name is commutator) and the brush, commutator and brushes are mounted inside the motor. The brush of general brush motors should be replaced after the brush were wore and tear about 2,000 hours. General hub Motor and column motor (also named centered motor) require professional maintenance personnel to replace, while the series motor can be replaced by the ordinary users.

There are eight common leads of brushless motor, three of them are coarse yellow, thick green and rough blue, the remaining five thin lines is the rotor position sensor leads. The remaining five thin lines is the rotor position sensor leads, small yellow, small green, small blue are rotor position signal leads. Brushless motor controller is provided signal by them to change the direction of winding current. Brushless motor for electric vehicles have two types of 60 degrees and 120 degrees, it can not distinguish from the appearance. Brushless controller also has the points of 60 degrees and 120 degrees, the motor and controller must be matched. There are 36 Connections species of the 8 Connections between Brushless motor and brushless controller connection. Wrong connection may damage the controller or the motor rotor position sensor Hall.

Jiangsu High-tech enterprises- Yangzhou Eagle Electronic Technology Co., Ltd., located in the northern suburb of Yangzhou, the transportation Here is convenient, it closes to the New Big provincial highway safety, and just take 10 minutes to the Beijing-Shanghai high-speed crossing. The company has passed ISO9001: 2000 certified Total Quality Management, ISO14001: 2004 environmental management certification and environmental certification by the EU Rosh. the company covers an area of about 20,000 square meters, the workshop area of 15,000 square meters, office and ancillary space of about 3,000 square meters. Currently, the company now has various professional and technical 35staff; they have strong R & D, design capability. Company's electric car division specializing in the production of full range controllers, including electrical motor controller, servo motor controller, brushless controller, dc servo motor controllers etc.

I was a sentimental and sensitive girl and my imagination was rich. I would be jealous if he had any affection towards other pretty girl, so I often quarreled with him because of other girls. He was mine and could not be others and I could not tolerate if he fell in love with other girls. He worked in brushless electric motor factory and was very busy every day and I knew he could not do that kind of thing, but I was jealous when his cell phone rang at night. I would suspect he had relationship with the person who called him. I did not want to be sensitive, but I got very angry one night when his phone kept ringing. He bought me a new brushless fan motor electric car several days later I got angry with him and swore that he had nothing wrong with other girls outside. In fact, I had believed him long before and I told him that I loved him so much. I rode the brand new brushless dc motor electric car to go to work every day and learnt to change myself bit by bit, learnt to be broad-minded and generous, that was to say.

I thought he was so unfair and so cruel. She loved him and I loved him as much. She could meet him every day, and why I could not? I was not convinced and became very restless when he said he had no time to meet me. I could still remember he said that he would buy me a brushless dc electric motor car several weeks ago, but he did not keep his words and delayed time and time again. He said he was disgusted with me and never wanted to keep in touch with me anymore when I kept on bothering him. I regretted and I knew I should not disturb him when he was busy. What I really wanted was not a brushless dc motorcar; I only wanted him to spare few minutes to give me a call when he was convenient and greet me how was I and my feelings about my new job. Making money was no doubt important, but he could no t meet her every day and ignore me in that way. I bought a dc brushless motor car with my own money one day, wanting him to get angry, but he had no response when I told him. I knew I had failed completely.

I had decided not to depend on anybody when I borrowed him money to buy a dc motor electric car and he did not reply my messages and answer my telephone. I was disappointed completely and swore that I would never call him again, even if I was waiting for life-saving money. I had to be self-reliant and did not ask anybody’s helps. A person should have changed so quickly. He said he would stretch his helping hands anytime time I needed his help yesterday, but he had vanished into the thin air and I could not find his shadow anymore the next. A brushless electric motor car was rather important for me, because I needed it to go to work and to go grocery shopping everyday. I often had to get up very early in the morning to the restaurant and there had not yet a bus at that early time. I bought the electric brushless motor car after three months of working in the restaurant. I could also fulfill my wish without anybody’s help, especially his.

I found my feeling was very vulnerable when I was neglected by him. I got along with him very well before, but he changed oddly one day. He did not care about me and ignored my existence suddenly. I did not understand. I thought I had found my true love when I encountered him, but I was wrong. I sold the Traxxas brushless motor electric car he bought for me when we just knew each other. I would miss him at the seeing of it and could not stop crying. I thought love would not be painful, I was still wrong; I failed in another love and was injured once again. The brushless dc motor bore too many memories of pains. I attempted to forget him and sold it to the people who wanted it. I planed to live lonely until I passed away. But I could not forget him no matter how I made great effort. I had loved him so much, why he betrayed me? Is there no true love in the world? I could see dc brushless motorselectric cars every day when I went to work, how I could forget him. Did I not go to work? Would time dilute all? I hoped so.

I could not help giving him calls when he did not answer my telephone. I was out of control. I only wanted to know how was him and what was going on with him. But he did not want to hear my phone at all. It was the first I loved a person so much and my heart was broken when he was unpleasant to answer my calls. I wore my small brushless motor car and went to a bookstore in the hope of immersing myself in the ocean of knowledge. But I could not settle down in any way and left there after half an hour. I really could not figure out why he treated me like that. Was there anything wrong with loving a person? I did not want we become enemy. I put on the brushless motor car and went to find him anywhere, but in vain. It was the first time I had such kind of strong feeling and I wanted to commit suicide when I could not find him. It was a pity if I lost him. He had occupied my all life. When I saw the brushless dc motor he bought me, I could not help crying and began to miss him. It was him who let me knowing the world was that warm, but why he changed so quickly?

I came across a passage saying “Getting to know a person needed one second, coming to understand a person needed one minute, falling into love with a person needed one day and forgetting a person took a lifetime”. I thought it was very reasonable. I rode my brushless electric motor car and went to a bar and shut myself in a box. I drank one bottle of beer and another. My eyes were filled with tears at the thought of his ruthlessness to me. Why he hated me so much and I loved him so much? I could see his ac brushless motor car no matter I opened or closed my eyes. I could not accept the fact of his breaking up with me. I thought I had been driven madness and I had the impulse to murder. I wanted to be extreme. I could not lose him, I could not hate him, nor could I forget him. I hoped we could be good friends forever. I saw his brushless ac motor car on the way to my house. I took out of my cell phone and dialed his number, but there was nobody answered forever. I was disappointed and painful to death.

He told me that I should not depend on him too much one day. Indeed, I confessed that I had added him much trouble since we knew each other. I disturbed him when he was dealing with his matters; I often asked him to meet me and occupied his valuable time; I asked him to buy an electric motor car and a television set when he was busy. We were not relatives, nor sweetheart; we were only ordinary friends and he had no responsibility to help me and I had no reason to accept his helps. I really should not have disturbed him, occupied his limited time and requested him to buy me the brushless motor electric car. But I had done all of them. Yes, I was lack of money, but I loved him not because of his money. Comparing to being lack of money, I needed his love the most, but he could not give me, because he had another woman. I rode the brushless dc motor electric car he bought for me every day and I would keep smiling on the electric car along the way to my company. I would attempt to seldom depend on him and find a boyfriend as soon as possible.

It was a fine day one weekend and one of my colleagues asked me to have a joyride on his brushless dc servo motor electric car, but I did not promise him. My brain was filled with him and I only wanted to take the opportunity to have an appointment with him. It has been half an hour that we did not meet. I missed his voice, his face and his conversations with me. He was talkative and an eloquent in my eyes and I would become suddenly enlightened after I had a talk with him if I encountered unhappy things. He said he was busy, so I rode my inrunner brushless motor electric car and went to a book shop he recommended to stimulate my inspiration of the next day’s writing. I was obsessed in the novels and forgot about the time. It had been completely dark when I looked at the outside. I did not want to leave at all, but the store had to close the doors. I rode the dc brushless motor electric car and went home reluctantly. I frequented the store nearly every weekend afterwards.

After class, Ms. Green asked me whether I had got the interpretation files. To be honest, I was hesitated to decide it. “Yes, I left it in my room; I will bring it to you tomorrow.” I said to her. “Thank you. As you will do the assistant work this time, I think it is necessary for you to copy the files, and then we can learn the professional knowledge together, it will be an unforgettable experience during your English study. It is fresh new to both of us, I’ve never heard of the brushless motors before; I collected some information about it online recently, and then I got to know that it is classified into the following series such as the rc brushless motor, brushless servo motor, brushless hub motor and so on.” Ms. Green said with a miserable expression. “Okay, I would have a try, wish a perfect ending of the interpretation”, said by me.

“Believe me, it is a good chance for you to shape yourself up. If you are brave to have a try, you would be more experienced than us in the oral field. Besides, your uncle would not blame you even if you made some mistakes.” Vicky said. “However, it is really a big order for my uncle; I cannot screw it up because of my mistakes.” I insisted. “How could you know that you would make it bad? When did you become so unconfident?” she asked in reply. “It’s true, such as the ‘brushless motor model’ and ‘dc brushless servo motor’, I never hear of them, then how can I explain to the visitors correctly?” I defended. “Though Ms. Green is competent in the interpretation, but you are really good at it, and your learning ability is really amazing”, said by Vicky. “Let me think about it, it is really a big case for me actually.” I replied.

“Where did you get these files? They are about the brushless electric motor! It seem difficult to us.” Vicky asked me curiously, “they are the interpretation materials about car brushless motor and car brushless motor, my uncle came to give me at dinner time”, I told her. “You mean you are going to do the interpretation, did your uncle introduce it for you?” she kept asking me questions after me. “No, no, they are for Ms. Green, my uncle hires her to do the interpretation, okay?” I felt impatient. “Wow, she is competent all the time! I like her course most”, said by Vicky. “But I think you can try to do the job, your uncle wouldn’t mind even if you made a mistake on the job. After graduation, we all have to do the relevant job, don’t you think so?” she said seriously. “You’re right, however, I’ve asked to do assistant job during the visit, I’m not confident of doing it well.”

“My brother is getting married on 5th next month, when is it the visit?” Ms. Lee asked me. “It is said that it would be holding at the middle of next month, I’m not sure actually. Later I will call my uncle and make sure the time first for you.” I said. “That’s very kind of you, you know, I’m looking forward to have such an opportunity. I did the interpretation in the small room every time, it made me nervous though I prepared well already. But this time, it seems casual and I don’t have to speak in an official way, just like chatting with the friends.” “Yes, you’re right, but the professional knowledge of brushless electric motors is needed.” I reminded. “I know, but it is simpler in general, the pressure would not be so tremendous at least. No matter the motor dc or ac motor，I can get a general knowledge of the industrial knowledge within the limited time.” She said confidently.

When I back to college, I went to Ms. Green’s office. She was preparing the PPT materials needed on class. Seeing my coming, she was happy, as she looked me as her sister. Though she is my tutor, we are good friends in private, and she is only three years older than me. On weekend, we often go shopping together; she has the same taste of clothes with me. “Would you like to do a part-time next month?” I said to Green. “About what?” she asked. “Well, you know my uncle is a brushless motor manufacturer, he is looking for a simultaneous interpreter for the coming visit. As the interpreter should have a good master of brushless dc electric motor, I don’t know whether you would like to do it.” I said frankly to her. “It’s really a great challenge for me, but I’m not sure that I would have time at that time.” she said to me.

“How much salary would you give for the interpretation work?” I asked Uncle Lee. “It all depends on her ability, if she did well; it wouldn’t be less than one hundred dollars a day. Besides, their visit would last about a week. The first two days, we would hold meetings to communicate face to face about the dc brushless fan motor and the brushless rc car motors, they are the two main products they want to purchase from us. The following two days, we would guide them to have a field trip to our workshop; they required an international standard environment for the rc & dc motor production, we have updated the equipment recently, and the working environment is comfortable for the worker.” Uncle Lee said to me. “The salary is really nice, if she did well, I think that you can hire her to do a long-term part-time job in case of looking for an interpreter every time.” I suggested.

As I major on English, so Uncle Lee asked me for help. He told me that he wanted an experienced interpreter, who could bear the tremendous pressure. “As I know our advisor Mrs. Green often act as the simultaneous interpreter of great Investment and Trade Forum in our city, we all adore her for her standard American pronunciation.” I said proudly. “Has she ever do the interpretation of the dc brushless electric motor, if she couldn’t master the mini detail of the manufacturing processes of the dc brushless motors, it makes no sense.” Uncle Lee said seriously. “Okay, I will make sure whether she could be competent for the job, its a little case for her I think” I asked. To enrich my experience, I asked to participate to the reception work and act as the assistant of the interpreter.

Uncle Lee ran a company in the south of our city; he is the best friend of my dad. Usually he would come to visit my dad on weekend; they play chess and talk about the current affairs together. I received Uncle Lee’s call this afternoon; he asked me whether I could introduce an English-Chinese interpreter for him. Next week, the Chinese customers would come to have a visit to Uncle Lee’s factory, so an English-Chinese interpreter is needed. “Should he know the professional?” I asked. “Yes, it would be better if he knows about the knowledge of scorpion brushless motors and mamba brushless motor. Before the interpretation, I will provide him the relevant documents about our brushless motor, there is still half month before their arrival, I think him would be familiar with our products within the time.” Uncle Lee said.

The English translation of drive is VFD (Variable-frequency Drive), this may be one of the few examples that the reverse of modern technology which by the Chinese translated into English. Variable-frequency Drive is electric drive components that apply variable frequency drive technology and microelectronic technology, through changing the motor frequency and amplitude to control ac motor. Affected by Japanese brushless motor manufacturers, Inverter has been called VVVF (Variable Voltage Variable Frequency Inverter) in China, Korea and other Asian regions. Servo system: servo mechanism is the automatic control system to make the object position, orientation and status charged follow the input output target (or reference). Its main task is to control the commands. The differences between Servo motor and VFD is that servo is a closed-loop servo control system, but the drive is usually working in the open-loop control, so on matter in terms of speed or accuracy, VFD can not be compared with servo.

Brushless DC motors have the same general principle and application characteristics with general DC motors, but and its composition is not the same. In addition to the motor itself, the former has additional circuit, the motor itself closely linked to the circuit. Many small power motors for the motor itself is one of the circuit synthesis, brushless DC motor and DC motor are the same from the appearance. DC brushless motor itself is part of electromechanical energy conversion, in addition to the motor armature, permanent magnet two parts, it also has sensor. Motor itself is the core of DC brushless motor, it is not only related to the performance indicators, noise and vibration, reliability and service life, but also involved in manufacturing costs and product costs. Think to adopt permanent magnetic field, made DC brushless motor DC motor out of the design and structure of general tradition.

At present, in the AC synchronous servo drive system, the general application of permanent magnet synchronous servo motor has two categories. A category known as the brushless DC motor, it requires the square wave current direct meditate into stator winding (BLDCM), another one is three-phase permanent magnet synchronous motor, which requires the input stator winding is still three-phase sine wave power. Brushless DC Motor (BLDCM) use a rotor with permanent magnet brush DC motor to replace the stator poles; then changing the original DC motor armature into the stator. Reversing the stator and rotor of brush DC motor and using permanent magnet rotor can save mechanical commutator and brush; this is the origin of brushless DC motor.

kollmorgen KBM frameless brushless motor follows RoHS standards. Although frameless part’s motor can not be certified as a component by sign or organizations, because KBM series motors are designed according to UL and CE standards, and thus it is conducive to customers’ high-level equipment to obtain certification. kollmorgen brushless motor and Cole Morgan AKD ™ servo drives can be used together, in this way, they can provide a comprehensive solution for optimizing the motor. KBM frameless brushless motor with excellent design and performance parameters, it is very all attractive for the need of a highly optimized and tightly integrated solution for medical electrical, metal processing and cutting, aerospace and defense, and oil and gas equipment, and many other applications fields, These motors are also very suitable for semiconductor and electronic assembly, renewable energy and vehicle electrification and other fields.

Induction motor is characterized by simple, rugged, low-cost, reliable, low torque ripple, low noise, no position sensors, and high speed limit. induction motor speed control technology is relatively mature，it making the induction motor drive system has obvious advantages, it has been earlier used in electric brushless motor drive system. Currently, Induction motor is still the mainstream products of electric vehicle drive system (particularly in the United States), but it has gradually been replaced by other new brushless permanent magnet traction motor drive system. The biggest drawback of electric vehicle motor drive is that the circuit is complexity and the cost is high; in comparison with permanent magnet motor, induction motor’ efficiency and power density is lower.

With the urbanization process, people living’s transport distance is expanding, the popularity of electric vehicles that instead of cars and bikes fuel greatly improving the power efficiency of resource use and promoting the healthy development of the national economy. electric bicycle powered by electricity, it does not produce any pollution during riding, so it is not destructive to the air quality. From the point view of improving the people travel’s way, environmental protection, economic conditions, permit conditions and other factors together, electric bicycles have a broad space for development in present and future. DC motors electric bicycles used are divided into brush motors and brushless motors, of which brush motor control is relative simple, but its easy- wear character will caused relatively large maintenance workload, brushless motor controller is complicated, , so the quality control requirements are much higher.

Servo: from the meaning of .Greek word "slave". People want to make "servo organization” into a docile tool, so as to subject to the requirements of control signal. Before the signal came, the rotor is stationary; when the signal came, it immediately turns the rotor; but when the signal disappears, the rotor can be immediately stopped. Because of its "server" performance, hence the name was adopted. Servo motors are generally divided into DC servo and AC servo. as to servo DC motors, the advantages is that it with accurate speed control, hard torque speed characteristic , simple principle, easy operation methods and cheaper price. But it also accompanies with some disadvantages, such as brush commutation, speed limits, additional resistance generated, wear particles (for clean room).

Linear motor is a kind of motor that change electrical energy to linear motion mechanical energy, it doesn’t need any intermediate conversion mechanism for the transmission device, it has simple structure, no contact sports, low noise, speed and high precision, easy control, easy maintenance, high reliability and many other advantages. with the innovation of industrial automation level, the linear motor applications fields are more and more widely. Japan Tamagawa, Panasonic, and other companies have linear servo motor products; Zhejiang University, China also has linear motor products. The world's major companies are making great efforts to develop new products and develop application fields. linear motor can be divided into synchronous motor, stepper motor, DC brush motor, brushless DC motor. At present, much automation equipment apply linear motor, such as high-speed presses, high speed cutting machines, satellite dishes, head drives, plotters, printers, copiers, scanners, power doors and so on.

The number of micro motor Internet area use about account for 38% of total micro motr. HDD spindle motor, spindle motor printers, copiers spindle motor, computer fan, high-end DVD spindle motor Are all based on permanent magnet brushless motor, all of them are precision brushless motor, due to precision requirement is high, so they used bonded NdFeB, 83% of the bonded NdFeB in Japan are used for these kind of permanent magnet brushless motor . Vibration motor for mobile phone, either cylindrical or button-type, most of the vibration motor adopt DC brush motor, but some of them are brushless vibration motor.

Permanent magnet brushless motor includes brushless DC motor, brushless permanent magnet AC synchronous motor, permanent magnet brushless linear motor and permanent magnet brushless torque motor in general. Permanent magnet brushless motor has many advantages, so it is the current development mainstream of micro motor. In face of 21st century, to meet the co-existence with the global environment, the micro robot in line with the human being’s requirements will develop rapidly, and build "a new era of micro motor." .Coexistence with the global environment requiring energy efficient, high output power saving materials, quiet and comfortable, harmless and no pollution motors. And network integration requires small, sheet, high-speed, lightweight, high-precision, high performance motors. In order to meet the above requirements, foreign micro motor manufacturing company attaches great importance to control the brushless motor and drive technology’ research and development.

If a company wants succeed and gradually grow to survive in an increasingly competitive market, the only way is to race with and market in technology. This is one of the purposes Kollmorgen adheres to. As the global head of industrial automation of Kollmorgen, Ronald W. Voigt convinced that race not only Not only refers to race with the market growth rate, it also contains a deeper meaning: to race with the need of market, timely find customers’ demand and use innovative technologies and products to meet customers. In China International Industry Fair 2010, Kollmorgen vigorously launched two new products AKD Drive series and KBM Series frameless brushless motor, it reaffirmed the ‘market leader’ capability of Kollmorgen, AKD drive Series provide users cutting-edge technology and performance with the industry's most compact space, which can be achieved seamless coordination work with best-in parts. Kollmorgen brushless motor with 14 vertical and horizontal sizes, voltage operation and provide the necessary torque, power and speed, highly flexible to meet the application requirements of specific performance and size. Therefore, KBM Series frameless brushless motor is praised by many manufacturers and customers at the exhibition.

In 70's of last century, the U.S. GATTYS company invented the machine torque DC servo motor, since then many countries’ CNC machine tools adopted large quantities of DC servo motor drive, and Open-loop system is gradually replaced by the closed-loop system. the control circuit of DC servo system which made of DC servo motor is relatively simple, and the price is also lower. Although induction motors are cheap, but early due to poor control performance, so induction motors not been applied in the numerical control system for a long time. But With the development of the modern motor control theory and power electronics technology, in 1971, Siemens invented the AC induction machine Blaschke vector control method; in 1980, a German named Leonhard made progress in the application of vector control. From the late 70s, CNC machine tool gradually adopts induction motor as Spindle drive motor.

After the implementation of reform and opening up, Chinese economy has been developing rapidly, however, it is the extensive economic development of high consumption, China proposed the target of the unit GDP energy consumption by 20% by the end of "Eleventh Five-Year" period , but also on building a conservation-oriented society, medium-term energy conservation plan of National Development and Reform Commission is preparing to take permanent magnet brushless motor as the energy-saving products, Because about 60% of electricity was consumed in the motor. , we should actively speed up all kinds of permanent magnet brushless motor’s research, development and industrialization. In addition to the advantages of owning rich rare-earth, there are human resources of permanent magnet brushless motors, the Government should formulate preferential policies and give full play to all aspects of personnel to create various types of independent intellectual property brand permanent magnet brushless motor.

Electrical appliance area used micro motors account for about 15% of total micro motor. Air conditioners, washing machines, refrigerators and other major home appliances firstly use single-phase induction motor, but it with low efficiency and low utilization. For the reason of energy conservation, people started to used asynchronous motor with frequency control the early 90s of last century. Currently, 90% of Japanese air conditioner uses permanent magnet brushless DC motor instead of induction motor variable frequency speed. Chinese air conditioner manufacturing fatories are beginning to use permanent magnet brushless DC motor to achieve better energy efficiency effect and material-savings. In the same rated power and rated speed, if suppose single-phase asynchronous motor’ volume and weight is 100%, then the volume of permanent magnet brushless DC motor is 38%, the weight is 34.8%,the copper is 20.9% with, the iron volume was 36.5%, If calculate in this way, the efficiency will save more than10%.

Robotics, aerospace and other areas also choice to use various types of micro motor. These motors have many different specifications; such as the U.S. military micro motor has more than 5,000 varieties, the annual production have already reach 300 million units. With the development of aerospace industry and robot, the demand for micro motor will increase greatly, so as to the requirements. Servo drives motors in these areas also convert the developing direction to permanent magnet brushless motor. Such as the U.S. military, aerospace, micro motor shaft Backbone unit –kollmorgen who has two permanent magnet AC servo motor series, M series have 5 Frame and 47 varieties, the power from 0.54 ~ 15.7kW, speed from 900 ~ 1200r/min, the continuous torque from 0.89 ~ 115N • m and the peak torque from2.41 ~ 326.8N • m; MT Series have 4 frame sizes and 24 varieties, the power from 0.231 ~ 6.7kW, the speed from 1500 ~ 6000r/min.

As to kollmorgen, Chinese market is a very important market. In recent years, electronic circuit boards, printing and packaging, CNC equipment, and other industries have achieved rapid growth. PCB industry is now increasingly concentrated in Asia, especially in China, including Taiwan and Southeast Asia. ‘We believe that the Chinese market has huge potential for development’, the marketing manager of kollmorgen said that. In 2011, Cole Morgan, kollmorgen will adopt two major actions in China: firstly, enhancing the development and application capacity of brushless motor, brush motor and servo motor; secondly, shift some production lines to China. In China, customers have their own unique needs, only the products designed and produced in china can fit the maximum possible actual needs of users.

Since the Indramat division of Rexroth of German MANNESMANN officially launched MAC permanent magnet AC servo motor and drive system in Hanover Trade Fair in 1978, which marks this new generation of AC servo technology has entered into the practical stage. To the late 20th century, many companies already have complete sires products. The whole servo-device market is turning to the ac system. The early analog systems existed many drawbacks, such as in the aspects of zero-drift, interference, reliability, accuracy and flexibility, they can not fully meet the requirements. In recent years, with the applications of microprocessor and new digital signal processor (DSP), there has been digital control system; control section can be done completely by the software. So far, high-performance electrical servo system widely use permanent magnet synchronous servo AC motor, the Control drive frequently use more quickly and accurately- locate all-digital position servo system. Typical manufacturers such as Siemens motor of Germany, Kollmorgen motor of the United States and Japanese Panasonic companies or Yaskawa.

Induction motor is kind of AC motor, the ratio between its rotational speed grid frequencies is not constant relationship; it also changes with the weight of the load. The greater the load torque, the rotor speed lower is. Induction motors including induction motors, double-fed asynchronous motors and AC commutator motor. The most widely used motor is induction motor. The stator windings of Common induction motor connected with AC power grid, the rotor windings don’t need to connect with other power. Therefore, it has simple structure, manufacture, use, and easy maintenance, reliable operation, small quality, low cost and other advantages. Induction motors have higher efficiency and better performance characteristics; they can satisfy the transmission requirements of most industrial and agricultural production machinery. Induction motor is also easy to generate a variety of protective type to meet the needs of different environmental conditions. As to the transport machinery require for a wide range of speed control, such as rolling mills, large-scale machine tools, printing and dyeing and paper making machinery….. Using DC motors are more economical and convenient. But with the development of high-power electronic devices and the AC drive system, performance and economy of induction motor that for wide speed have to be comparable with the DC motor.

Brushless motor has a lot of advantages, so it was widely used in all kinds of occasions. 1 No Brush, low noise: brushless motor deducts brush, the most immediate change is not brush spark generated when the motor is running, thus greatly reducing the sparks to the remote control radio interference. 2 Low noises, operates smoothly: without brushes, brushless motor greatly reduced running friction during operation, the noise will be much lower, this benefits is a huge support for model operational stability. 3 Long life, low maintenance costs: without brush, brushless motor’ wear mainly in the bearing, and from the point view of mechanical, brushless motor almost is maintenance free electric motor. After the comparison, you will know where is the advantages that brushless motor compared to the of brush motor. But everything is not absolute, and low-speed torque performance, torque and other performance characteristics of the brushless motor can not be replaced.

Panasonic of Japan has launched small AC servo motors and brushless motor drives, of which inertia series are suitable for CNC machine tools, and the middle inertia series can be used for the robot (the highest speed of 3000r/min, torque is 0.016 ~ 0.16Nm), the company also introduced the small inertia series. Panasonic has introduced new A4 series and A5 series in 1919s. Driving by the old series rectangular wave, 8051 SCN are change into the sine wave drive, then the torque ripple decrease from 24% to 7%, and the reliability also was improved. Thus, only a few years latter, the company has accomplished eight series (power range of 0.05 ~ 6kW) more complete system to meet the different needs of working machinery, transportation agencies, welding robots, assembly robots, electronic components, processing machinery, printing presses , high speed winding machine and winding machines. You have to say that Panasonic is a powerful developer and manufacturer of the servo motor.

Servo motor is the engine that to control mechanical components’ running in servo system, it is also a servomotors device. Servo motor can control the speed; the position accuracy is very accurate. The micro motor used for automatic control device implementation components also known as the implementation motor. Its function is to convert electrical signals into the shaft of the angular displacement or angular velocity. Servo motor consists of AC motor and DC motor two types. The working principle of AC servo motor is the same with the AC induction motor. AC servo motor with a stable, controllable, rapid response, high sensitivity, mechanical properties, regulation characteristics of the nonlinear index strict (requiring respectively less than 10%-15% and less than 15% to 25%) characteristics. DC servo motor’ works principle is the same with the general DC motor.

CNC machine tool is orientating to the direction of sophisticated, high-speed, complex, intelligent, and environmentally friendly. Precision and high-speed processing requires a higher requirement for transmission and controller: Higher dynamic performance and control precision, higher feed rate and acceleration, lower noise and vibration and less wear and tear. The symptom of the problem is that when the traditional transmission chain goes trough the motor, it must be through the gears, worm gear, belts, Ball Screw, couplings, clutches and other transmission links, and there will produce greater inertia, elastic deformation, Backlash, motion lag, friction, vibration, noise and wear in these link. Although there are some promotion after continuous improvement, but it is difficult to solve the problem fundamentally. So the concept of "direct drive" was appeared, which abandon intermediate links from the motor to the various components. With the development of motor and drive control technology, Spindle, the "direct drive" of linear and rotary coordinates movement concept has came into reality. The use of Linear motor and its drive control technology in the machine tool made significant changes in the structure. Linear Motor and General Motors is similar in principle, it is only the extent of the motor cylinder; its categories are the same with the traditional motor. Such as: DC motor, AC permanent magnet synchronous linear motor, AC induction motor and stepper motor.

Micro motor is a kind of special-purpose motor that with a special performance and with less than 160mm diameter or less than the 750W power rating. Micro motor multiplies brush motor, brushless motor,micro motor, micro-electronics, power electronics, computer, automatic control, precision machinery, new materials and other industry’ high-tech industry technology, especially the application of electronics and new materials technology has promoted the technology progress of micro motor. Micro motor have many species more than 5000 species), the size is complex, and the market applications is wide, involving the national economy, national defense equipment, all aspects of human life, micro motor can be seen in any occasion that requires for electric drive.

Boshan Xinte motor plant located in one of the four motor bases, the opening to outside world city of Shandong Peninsula - Zibo Boshan district. It the largest production enterprises specialized in producing domestic servo DC micro-motor, micro AC motor and various types of gear and control systems. Thinks to accumulating years of rich experience in research and development, using the world's most advanced processing equipment and relying on domestic famous scientific research institutes, Boshan Xinte motor company is fully capable of developing, producing special motor and transmission system to meet the various needs of users, their products are selling well at home and abroad. These motors are widely used in CNC machine tools, paper printing, textile printing, food packaging, electrical machinery, rubber machinery, laboratory equipment, welding cutting, light industrial machinery, conveying equipment, locomotives, medical equipment, communications equipment, radar equipment, satellite ground receiving system and other industries.

In the AC line, people also widely used the AC induction motor to drag the working machinery; induction AC motor has a simple structure, it has the advantages of long life span, low cost, easy maintenance. However, compared with the DC motor, its peed performance is poor, the starting torque is small, and the overload ability and efficiency is low. The rotating magnetic field generation must reactive power from the grid, so the power factor is low, particularly at light loads, this will large increase in the losses of line and grid. It is hardly use synchronous motors in the past Electric drive, the main reason is that synchronous brush motors can not be rotating itself under the voltage, the average torque is zero when the still rotor pole under the effect of the rotating magnetic field.

In recent years, China goes through the development process from manufacturing country forward to manufacturing power country, because the state attaches manufacturing equipment and the technological transformation to the work, with the gradually increase of Cost-effective of full-digital AC servo system. AC servo motor as high class precision components of control the motor, the market demand will grow steadily; we will be very optimistic about its prospects nearly 5 years. According the figure show in a research, nearly 51% of the original DC servo motor and stepper motors customers ready to replace the permanent magnet AC servo system, the power within 3kW , of which 85% of motor below 1000W are servo motors. Permanent magnet AC servo motor has become the protagonist in Chinese market.

The Eleventh China International Industry Fair appeared in at the Shanghai New International Expo Center on November 3 -7, 2009. Baldor motor Electric company will bring a series of new products and technology that developed out in 09 decorate the feast this automated technology, displaying a series of high-performance brushless motor , brush motor, brushless motor drive / controller. Baldor Electric Motor is such an automation supplier, through the transformation of global business trend, combining with advantages of industry and newcomers, entering into the fast track of growth in the Chinese market. Baldor Electric formerly is American BALDOR, once called Badu motor, starting from April 2009, renamed Baldor Electric (Shanghai) Co., Ltd. From the company name change the "motor" into "Electric" indicates that BALDOR industrial motors transforms from the pure electric drive manufacturers to change suppliers.

As of the end of 1999, domestic all-digital AC servo motor and servo drives basic independent develop successfully, but lags behind in terms of industrialization, commercialization and mass production capability has not been formed. Precision AC servo motor control system demand is also largely depend on the imports, such as Mitsubishi, Panasonic, Fujitsu, Siemens and so on. In recent years, NC Central, Guangzhou CNC, aerospace NC, Lanzhou servo brushless motor drivers and motor products have entered into the industrialization stage. but these mainly concentrated in the machine tools industry, not for full range of automation and control industry standard products. As China is a big manufacturing country, in addition to CNC machine tool industry, other industries demand for a variety of servo motors is increasing year by year, To this end, foreign servo motor manufacturers in succession planning or have already set up wholly-owned factories in the country, using local resources and cheap labor, they produce a variety of general-purpose servo motor products.

The biggest advantages of electric vehicles are environment friendly and save money. The prospects for development are very promising, electric cars eventually replace gasoline is no longer a dream. Batteries, motors, electric vehicle control system is the three core technology of electric vehicle, BYD Chairman Wang said that it is more simple to make four-wheel drive electric vehicle, the most important thing is to add motor on the line. As the output of battery is DC current, but it will engender the friction when the brush DC motor commutator running, it will limit the speed of electric vehicles. However, permanent magnet brushless motor which made of magnetic materials with high power density and efficiency, and wide speed range, the outstanding advantages is small size, light weight (the ratio of mass is 0.5 -1.0kg/Kw), high efficiency, maintenance-free, wide speed range and using electronic exchange to replace the mechanical commutator, brushless motor has become the mainstream motor variety of electric vehicles.

The so-called ‘new permanent magnet brushless motor’ also rotate by electromagnetic effects, but it was added a ‘magnet’ and reduced a "brush.” with it, motor can Self-generated magnetic, its size and weight only equal to 38%, 35% and 21% of the same copper traditional brush motors, while the motor efficiency can be increased by 10% or more. ‘Brush’ is an essential thing of traditional motor, after adopt advanced electronic control technology, it can achieve the transformation from" brush "to" brushless”, it not only make the motor leave the brush noise caused by friction, but also increase the life span of the motors. This is the reason why the printer and copier spindle motor, a small fan inside the computer, digital DVD within the motor use permanent magnet brushless motor. It is understood that China has plans to promote the permanent magnet brushless motor as energy products, accelerating the development of various types of permanent magnet brushless motors and industrial is imperative.

Control Magazine is a famous American professional journal on industrial automation; it has a wide range of readers in the United States. This year is the twelfth year that Control magazine investigates the best industrial automation products and services. Today, Baldor motor Electric company was awarded the ‘annual Reader's Choice Award’ by magazine. As a selected award voted by the user and the experts, it has good representation; it is very significant thing for Baldor motors, because the readers represent most cutting-edge machine manufacturers and system manufacturers in the industry. Currently, there are 37% customers regard Baldor's motor as the preferred supplier of motor, it is widely considered as the supplier that can provide the most efficient motor. Baldor Electric Company has advanced production lines to meet the needs of various customers. The Electrical power of industrial DC motor and AC motor between 1 / 6 and 2000 horsepower are the mainstream products Baldor, at the same time, it also provide a large motor to 20,000 horsepower.

In the eighty years of development history, the United States Baldor motor Electric Company is committed to providing customers energy efficient industrial electric motors, it is the pioneer and innovator of energy efficient industrial motors in the industry. Taking the Industry Fair 2010"Technology innovation, rejuvenate the equipment manufacturing industry," theme as center, Baldor motor bring a variety of new products actively show industrial electronics sectors’ positive constant innovation and technological progress, it perfectly embody the first U.S. motor manufacturer’ prominent position. Baldor, Dodge and Ryan joined forces in this field; they show perfect combination in the Industry Fair, highlighting the leading position of micro brushless motor and large motor, displaying brilliant high-endurance and high durability products for clients.