The development and application of rare-earth permanent magnet synchronous motors have expanded the application of permanent magnet synchronous motors in various industries. The most significant performance characteristics of rare-earth permanent magnet motors are lightweight, high performance, high efficiency and energy saving.
High-performance rare earth permanent magnet motor is the basis of many new technologies and high-tech industries. It is combined with power electronics technology and microelectronics control technology, can produce a variety of excellent performance of mechatronics products, such as CNC machine tools, machining centers, flexible production lines, robots, electric vehicles, high-performance household appliances, computers and so on. With the continuous development of rare earth permanent magnet motor technology, the industry is gradually showing the following trends!
First, to the direction of high efficiency and energy saving
rare earth permanent magnet motor is a high efficiency and energy saving products, the average power saving rate of up to 10% or more, special rare earth permanent magnet motor can be as high as 15% to 20%.
The energy saving of the motor is divided into two aspects. On the one hand, it is to reform the structure of asynchronous motor, improve efficiency and other performance, asynchronous motor with its simple structure, cheap, adapt to various working conditions and other advantages are widely used in various fields of industrial production. Secondly, the development of permanent magnet synchronous motor can achieve higher power saving effect.
The main way to improve the efficiency of motor in foreign countries is through the optimized design of asynchronous motor, increase the amount of effective materials such as copper, aluminum, electrical steel plate, etc., to reduce the winding loss and iron consumption; the use of better magnetic materials and processes to reduce iron consumption: reasonable design of ventilation structure and selection of high-performance bearings to reduce mechanical losses; through the improvement of the design and process to reduce the stray loss, foreign countries have developed high-efficiency asynchronous motors. The high-efficiency asynchronous motor has been developed in foreign countries through improved design and process. According to China's national conditions, high-performance rare earth permanent magnet materials have been industrialized, NdFeB production now ranks first in the world, and NdFeB prices tend to be reasonable. So the development of permanent magnet synchronous motor is one of the new century motor industry technology development trend.
Second, to the direction of mechatronics development
To enhance the level of traditional electromechanical products, we must grasp the link of mechatronics. The basis for the realization of mechatronics, is the development of a variety of mechatronics requires a variety of high-performance rare earth permanent magnet motors, such as servo motors for CNC machine tools, computers with VCM voice coil motor. A 60 knife machining center, to be equipped with 30 servo motors. Frequency control rare earth permanent magnet synchronous motor and brushless DC motor is the basis of mechatronics.
Third, to the direction of high-performance development
modern equipment to the motor industry to put forward a variety of high-performance requirements, such as military equipment required to provide a variety of high-performance signal motors, mobile power plants, automation equipment with servo systems and motors, aerospace with high-performance, high-reliability permanent magnet motors, chemical fiber equipment with high speed precision frequency synchronous motors, numerical control machine tools, machining centers, robots, with a high speed ratio of rare-earth Permanent magnet servo motors for CNC machine tools, machining centers, robots, high speed ratio rare earth servo motors for computers, high-precision swing motors and spindle motors, etc.
Fourth, to the direction of the development of specialized motors
motor driven by the load is ever-changing, such as all the use of general-purpose motors, in some cases, the technology and economy is very unreasonable. Therefore, foreign countries vigorously develop specialized motors, specialized motors accounted for about 80% of the total output, general-purpose motors accounted for 20%. And our country is just the opposite, special motor only accounted for 20%, general-purpose motors accounted for 80%. Specialized motors are specially designed according to the characteristics of different loads, such as oilfield pumping special rare-earth permanent magnet motors, power saving rate of up to 20%. Energy saving potential in this area is very large.
Motor workers should not only study the motor itself, but also should study the characteristics of the drive load, design advanced performance, reliable operation, reasonable price of rare earth permanent magnet motor products.
Fifth, the direction of lightweight development
aerospace products, electric vehicles, CNC machine tools, computers, audio-visual products, medical equipment, portable optical mechatronics products, etc., are put forward to the motor of the small size, light weight strict requirements. Permanent magnet synchronous motor with its small size, energy saving, good control performance, and easy to make low-speed direct drive, the elimination of gear reducer, can be through the change of frequency for speed regulation, etc., in the elevator technology to develop applications. 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 motors and lightweight.
