Analysis on the development trend of the hottest r

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Analysis of the development trend of rare earth permanent magnet motor technology

the development and application of rare earth permanent magnet synchronous motor has expanded the application of permanent magnet synchronous motor in various industries. The most significant performance characteristics of rare earth permanent magnet motor in recent years are light, high performance, high efficiency and energy saving. High performance rare earth permanent magnet motor is the foundation of many new technologies and high-tech industries. Combined with power electronic technology and microelectronic control technology, it can produce various electromechanical integrated products with excellent performance, such as CNC machine tools, two common types of tension machines, machining centers, flexible production lines, robots, electric vehicles, high-performance household appliances, computers, etc. With the continuous development of rare earth permanent magnet motor technology, its industry gradually presents the following development trends

develop towards high efficiency and energy saving

rare earth permanent magnet motor is also a kind of high-efficiency and energy-saving product, with an average power saving rate of more than 10%, and the special rare earth permanent magnet motor can be as high as 15% - 20%

the energy saving of motor is divided into two aspects. On the one hand, it is to reform the structure of asynchronous motor to improve efficiency and other performance. Asynchronous motor is widely used in various fields of industrial production because of its simple structure, low price and adaptability to various working conditions. The second is to develop permanent magnet synchronous motor, which can achieve higher power saving effect

the main way to improve the efficiency of motors abroad is to increase the consumption of effective materials such as copper, aluminum and electrical steel plate through the optimal design of asynchronous motors, so as to reduce the winding loss and iron consumption; Adopt better magnetic materials and processes to reduce iron consumption: reasonably design ventilation structure and select high-performance bearings to reduce mechanical losses; By improving the design and process, reducing stray loss, foreign countries have developed high-efficiency asynchronous motor. According to China's national conditions, if you print out a cup with PLA, the rare earth permanent magnet material with performance has been industrialized, the output of Nd-Fe-B has now ranked first in the world, and the price of Nd-Fe-B also tends to be reasonable. Therefore, the development of permanent magnet synchronous motor is one of the development trends of motor industry technology in the new century

develop towards Mechatronics

to improve the level of traditional mechanical and electrical products, we must firmly grasp the link of mechatronics. The foundation of realizing electromechanical integration is to develop various high-performance rare earth permanent magnet motors required for electromechanical integration, such as servo motors for CNC machine tools and VCM voice coil motors for computers. A 60 knife machining center should be equipped with 30 servo motors. Rare earth permanent magnet synchronous motor and brushless DC motor with variable frequency speed regulation are the basis of mechatronics

develop in the direction of high performance

modern equipment puts forward various high-performance requirements to the motor industry, such as military equipment requirements to provide all kinds of high-performance signal motors, mobile power stations, servo systems and motors for automation equipment, high-performance and high reliability permanent magnet motors for aerospace, high-precision variable-frequency speed synchronous motors for chemical fiber equipment, CNC machine tools, machining centers Rare earth permanent magnet servo motor with high speed regulation ratio for robots, high-precision swing motor and spindle motor for computers, etc

develop towards special motors

the loads driven by motors are ever-changing. If all general motors are used, in some cases, the technical economy is very unreasonable. Therefore, foreign countries vigorously develop special motors, which account for about 80% of the total output, and General Motors account for 20%. In China, on the contrary, special motors account for only 20%, and General Motors account for 80% of the layout information of the text. Special motors are specially designed according to different load characteristics, such as rare earth permanent magnet motors for oil field pumping units, with a power saving rate of up to 20%. There is great potential for energy conservation in this regard. Electrical workers should not only study the motor itself, but also study the characteristics of the driven load, and design rare earth permanent magnet motor products with advanced performance, reliable operation and reasonable price

develop in the direction of lightweight

aerospace products, electric vehicles, numerical control machine tools, computers, audio-visual products, medical devices, portable optical electromechanical integration products, etc., all put forward strict requirements for motors with small volume and light weight. Permanent magnet synchronous motor has been developed and applied in elevator technology because of its small size, energy saving, good control performance, easy to make low-speed direct drive, elimination of gear reducer, speed regulation through frequency change and other advantages. It is believed that with the development of electronic technology and control technology, rare earth permanent magnet synchronous motor technology will develop and become more and more perfect in the direction of high efficiency and energy saving, electromechanical integration, high performance, special motor and lightweight

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