Rare earth permanent magnet motor technology trend analysis

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Rare earth permanent magnet motor technology trend analysis 2012-08-03

Rare earth permanent magnet synchronous motor development and application of the expansion of the permanent magnet synchronous motor applications in various industries, rare earth permanent magnet motor performance characteristics of the most significant is the lighter, high performance, energy efficient. High-performance rare earth permanent magnet motor is that many new technologies, high-tech industry base. With power electronics and micro-control technology combined can produce a variety of mechanical and electrical integration, high performance products, such as CNC machine tools, machining centers, flexible production lines, robotics, electric vehicles, high-performance home appliances, computers, etc. . With the rare-earth permanent magnet motor technology continues to develop its industry takes on the following trends.
The efficiency and save energy
Rare earth permanent magnet motor is an efficient energy-saving products, the average saving rate of 10% or more, special rare-earth permanent magnet motor can be as high as 15% to 20%.
Two aspects of energy saving motor. On the one hand the reform asynchronous motor structure to increase efficiency and other performance, asynchronous motor with its simple, cheap, Shi Ying Deng Youdian all kinds of conditions is widely used in industrial production in various fields. Second, the development of permanent magnet synchronous motor, can achieve higher energy-saving effect.
Abroad to improve motor efficiency of the main ways is through the optimization of induction motor design, increased copper, aluminum, electrical steel and other materials amount effective to reduce winding loss and iron loss; the adoption of better magnetic materials and processes to reduce the iron loss: rational design and selection of high-performance air bearing structure, reducing mechanical wear and tear; by improving the design and technology to reduce stray losses, and foreign have developed highly efficient induction motor. According to our country, high-performance rare earth permanent magnetic materials have achieved industrialization, NdFeB production now ranks first in the world, NdFeB prices become more reasonable. Therefore, the development of permanent magnet synchronous motor is a motor of industrial technology development in the new century one of the trends.
Direction to the mechanical and electrical integration
To enhance the level of traditional mechanical and electrical products, mechanical and electrical integration must seize this link. The basis for achieving mechanical and electrical integration, the development of a variety of mechanical and electrical integration for use by a variety of high-performance rare earth permanent magnet motor, servo motor, such as CNC machine tools, computer with a voice coil motor VCM. 60 knives a processing center, to be equipped with 30 sets of servo motors. Frequency of rare earth permanent magnet synchronous motors and brushless DC motor is the mechanical and electrical integration.
Direction to high-performance
Modern equipment made to the motor industry a wide range of high-performance requirements, such as military equipment required for a variety of high-performance signal motors, mobile power plants, automation equipment, servo systems and motors, aerospace and high-performance, high reliability, permanent magnet electrical, chemical fiber equipment, high-speed precision frequency control with a synchronous motor, CNC machine tools, machining centers, robots with a high-profile ratio of rare earth permanent magnet servo motor, swing motor and a computer with high-precision spindle motors and so on.
Direction to the special motor
Changing the motor driven load, such as used in all general-purpose motors, in some cases, the technology economy is unreasonable. Therefore, to develop foreign special motor, special motor about 80% of total production, General Motors accounted for 20%. In China, on the contrary, only 20% of private motor, universal motor 80%. Special motor is not under the specific terms of different load characteristics, such as oil field pumping unit dedicated rare earth permanent magnet motor, power up to 20%. This energy-saving potential. Electrical workers must not only of motor itself, but also the characteristics of the load should be driving the Institute to design advanced, reliable, reasonably priced products of rare earth permanent magnet motor.
To develop in the direction of light
Aerospace products, electric vehicles, machine tools, computers, audio-visual products, medical devices, portable optical electromechanical integration products are made on the motor size and light weight of the strict requirements. Permanent magnet synchronous motor with its small, energy saving, control performance, they are likely to cause low-speed direct drive to eliminate the gear reduction through changes in frequency of the advantages of speed, in the elevator for development and application technology. We believe that with electronic technology and control technology, rare earth permanent magnet synchronous motor technology will move toward energy efficient, mechanical and electrical integration, high performance, special motors, light in the direction of development and maturing.

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