1. Development of China's high-power motors
The production and application of Chinese motors started very late, but it has developed rapidly.
China has been produced and applied in the Cultural Revolution, such as Jiangsu, Zhejiang, Beijing, Nanjing, Sichuan, and is used in various industries. All semiconductor devices of the driver circuit are completely localized. At that time, they were composed of fully discrete components. Logic operation circuit, as well as a counter for capacitive coupling input, a trigger, and a ring distributor. Medium-voltage high-power semiconductor devices are also completely localized. At that time, the most widely used wire-cutting machines were all fast-moving. The X-Y platform screw of the wire cutter is driven by a stepper motor. The drawings at the time were open to the public, and the cost of a blueprint would be fine.
With the implementation of the policy of reform and opening up, China's motor development in the 1980s was very rapid.
In the initial stage of reform and opening up, the subdivision control of stepping motors has been basically mastered in China, which is much less difficult than the vector control of AC motors. In satellites, radars and other applications, China produced torque motors in the late Cultural Revolution and produced ring-shaped torque motors.
The research and application development of linear motors in China began in the early 1970s. In 1972, Zhejiang University first translated a copy of the "Linear Induction Motor" in China, and then published it by the Science Press. Later, Shanghai University, Shanghai Electric Machinery Factory, and the Institute of Electrical Engineering of the Chinese Academy of Sciences compiled some books on linear motors. In the past two years, Zhejiang University has successively published three books on linear motors. The main units for linear motor application research in China are: Institute of Electrical Engineering, Chinese Academy of Sciences, Xi'an Jiaotong University, Zhejiang University, Shanghai University, Taiyuan University of Technology, Jiaozuo Mining Institute. Wait. The main achievements include factory driving, electromagnetic hammer, punching machine, friction press, magnetic sorting machine, glass stirring, stretching machine, feeder, particle accelerator, postal sorter, mine transportation system, computer disk positioning system, automatic drawing. Instrument, linear motor drive remote control (electric) curtain machine, linear motor drive door, fried tea machine, etc. Although China's linear motor research has also achieved some results, but compared with foreign countries, there is still a big gap in its promotion and application. Many domestic research papers should have paid more and more attention to this point.
Since the 1990s, China's high-power motors have been widely used in heavy industry, and the technology is relatively mature.
2. Development of small power motors
After more than 40 years of development, especially in the rapid development of reform and opening up over the past 20 years, China's small power motor industry has made great progress.
The development of the small power motor industry in China is divided into two stages. The first stage, in line with the needs of the development of China's home appliance industry, is applied to small power motors such as fans, air conditioners, refrigerators, washing machines, range hoods, small household appliances, health care appliances, etc., domestic enterprises through technology introduction, equipment introduction and absorption, The gap with developed countries has been narrowed, and the technical level of some products has reached the international advanced level. The company has strong independent research and development capabilities, independent intellectual property rights, and has also formed some product brands with extensive market reputation. Motor products are exported to Europe and the United States and other international markets. At the same time, with the home appliances such as fans and air conditioners selling well in the international market, it has become a major part of China's electromechanical export business. In the second stage, with the rapid development of the automotive industry, the demand for small-power motors for vehicles has also grown rapidly, driving the permanent magnets straight.
The rise of flow- and brushless DC motors as the main vehicle-based functional low-power motors.