Application status and development trend of rare earth permanent magnet motor

Since the beginning of the 21st century, the energy problem has become the core topic of global concern, and building a resource-saving and environment-friendly society has become the trend of globalization. This paper analyzes the current situation and development trend of rare earth permanent magnet motor.

For the current development situation in our country, because our economy is developing steadily, our country’s non-renewable resources such as oil and natural gas are also being continuously consumed. For our country, economic development and people’s daily life cannot be separated from energy. If there is a shortage of energy, it will have a great impact on our country. Therefore, our country puts the development goal on sustainable development on energy, and strives to build a resource-saving and environment-friendly society. In this paper, the application of the rare earth permanent magnet motor and the current development trend are studied, hoping to make a contribution to the development of the rare earth permanent magnet motor in China.

Working Principle of rare earth permanent magnet motor

Structure of rare earth permanent magnet motor

For the current development situation in our country, the rare earth permanent magnet motor is still a relatively new technology, and this kind of equipment is still a relatively new type of equipment. Therefore, to understand the structure of the rare earth permanent magnet motor, it has become a very important item. Rare earth permanent magnet motor works mainly according to magnetic field as medium, which will convert mechanical energy and electric energy, and it is a kind of relatively advanced electromagnetic device. Its motion mechanism is different from the working principle of other equipments. Firstly, it transforms the electric energy of the air gap magnetic field into the air gap magnetic field which needs to be generated by the permanent magnet, and then it enters the winding current of the motor from inside, the main purpose of the two corresponding devices is to provide energy to maintain the flow of current. The motor is also composed of two parts, namely stator and rotor, the stator is the fixed part of the motor when it is running. It is mainly composed of two symmetrical parts.

Working principle of rare earth permanent magnet motor

Because the rare earth permanent magnet motor is a relatively new technology and can provide a lot of energy for the development of our country. Unlike other Motors, its working principle is mainly a kind of mutually perpendicular electromagnetic force, it is generated by the magnetic field interaction between the stator and the rotor. This electromagnetic force is mainly formed in the plane, which can maintain the movement of the motor, and it is formed by the interaction between the magnetic field generated in the magnetic array and the current. When the electromagnetic rotation has overcome the inertia of the rotor itself, and the permanent magnet motor rotor of magnet generates damping rotation distance, the motor will start to move.

Development of rare earth permanent magnet machine

Rare earth permanent magnet and its own advantages

  • (1) The advantages of high efficiency, environmental protection and energy saving. With the continuous development of China’s economy, China’s energy is also constantly consumed, but China’s industry still needs continuous development, so rare earth permanent magnet machines have come into being, the emergence of rare earth permanent magnet machines has also brought great convenience to China’s industry. Similar to other energy sources, rare earth permanent magnetic motors have their own advantages. First of all, this kind of rare earth permanent magnet motor has very high working efficiency and is more energy-saving and environmentally friendly than other energy sources. Because rare earth permanent magnet mainly relies on electrons to work, it is a very efficient energy-saving product. Compared with other induction motors, rare earth permanent magnet motors do not need reactive power excitation current, so they can have a larger power factor than other motors. And the statistics and calculation results conducted through various experiments also show that the working efficiency of rare earth permanent magnet motor is increased by 2% ~ 8% compared with other induction motors. At the same time, small rare earth permanent magnet motors can also replace very large-capacity induction motors to work, indicating that rare earth permanent magnet motors can produce larger energy than ordinary induction motors. Rare earth permanent magnet motor can help our country to solve the problem of a lot of energy waste. If our industry can use the rare earth permanent magnet motor for a long time, it will surely achieve the purpose of energy conservation and environmental protection, this is also conducive to the sustainable development of our country.
  • (2) The advantages of high efficiency. For rare earth permanent magnet motors, besides being more efficient and environmentally friendly than other induction motors, they also have the advantage of high efficiency. This advantage of high efficiency is also an advantage that cannot be ignored for rare earth permanent magnet motors. For some relatively standard traditional motors, its work cannot meet the daily needs of our country’s current factory production. If it is built on a large scale, this traditional motor may cause waste of resources, it will also cause great economic pressure on the development of the factory, and the speed regulation of the rare earth permanent magnet motor can reach 10,000 times that of the traditional standard motor when it is used in some mechanisms. At the same time, it has also achieved the accuracy of the accuracy, which will not be reduced by the improvement of speed regulation at all, and the accuracy can even reach 0.1% error, which cannot be achieved by ordinary traditional motors, it can also provide better energy support for factories.
  • (3) The advantages of structural diversity. Rare earth permanent magnet motor not only has very high efficiency, but also has very diverse structures and can be applied to various factory environments. Compared with other ordinary motors, because the rare earth permanent magnet motor has a variety of structures and types, its application range is expanded. The reason why rare earth permanent magnetic motors can have various types is mainly because its rotor structure can have a variety of changes, and the rotor for permanent magnetic motors can affect its characteristics and performance, therefore, from the needs of people’s daily life to the needs of aerospace, from simple electric tools to more advanced scientific and technological products, they can all be applied to rare earth permanent magnet motors.

Application of rare earth permanent magnet motors at home and abroad

Because of the development of economy, the pollution of each country is very serious, so with people’s requirements for environmental protection and energy conservation, as well as the need for sustainable development of each country, it has made the rare earth permanent magnetic motor applied to all fields of various countries, and its popularization rate has reached about 33%. At the same time, because the development of rare earth permanent magnetic motor is also very rapid, moreover, the energy provided by it is beyond the reach of ordinary motors, so it is also applied to the field of aerospace. In addition to the field of aerospace, there are applications of rare earth permanent magnetic motors in the industries such as ship electricity, fan and water pumps.

  • (1) The use of daily household appliances. Rare earth permanent magnet motors are not only widely used in the aerospace field, but also in daily household appliances. It can be said that they are closely related to people’s lives, because in the rare earth permanent magnet motors, its brushless DC motor can be used as the second generation of variable speed refrigeration technology, so it is widely used in air conditioners and refrigerators at home and abroad, basically, of air conditioners and refrigerators use rare earth permanent magnet motors to cool. At the same time, they are also used in electric fans and washing machines. For rare earth permanent magnet motors, because it has very high control accuracy, it is widely used in air conditioning compression motors, which can make permanent magnet exchange more efficient, using permanent magnet motor to make air conditioners can be said to be a very new type of DC frequency conversion technology, which is now the main trend of the development of air conditioners and home appliances.
  • (2) Application of shipping industry. In addition to its wide application in daily household appliances, the shipbuilding industry at home and abroad will also apply permanent magnetic motors to work, because it is a kind of ship propulsion system with high efficiency generally, the ship propulsion system is driven by full power, and the development of rare earth permanent magnet motor can better promote the ship industry, with the continuous development of the shipping industry, its technology has gradually matured.

Development direction of rare earth permanent magnet motors

With the continuous progress of economy, science and technology are also developing continuously, which has produced many high-tech and high-tech industries. With these industries as the basis, the rare earth permanent magnet motors can also be better combined with these high and new industrial technologies, for example, it can be combined with Microelectronics control technology and power electronics technology, this combination can produce more novel and excellent integrated electronic products. Rare Earth Permanent magnetic motors can be used as the basis for the development of these products, making the motor development in the 21st century march towards a new stage.

  • (1) Tthe development direction of motor. For the development of rare earth permanent magnet motors, motors can be used to drive the load. For example, motors can be used to work entirely. Under some necessary circumstances, technology and economy are not developed reasonably, for example, special motor design can be developed according to different load characteristics. Rare earth permanent magnetic motors with a special energy saving rate of more than 20% are developed in this direction, and on the basis of the development direction of some specialized motors, some motors have very large energy-saving potential, which also puts forward very high requirements for motor workers, they are required not only to conduct careful research on the motor itself but also to conduct fine research on the load characteristics of the motor drive, so as to design products of rare earth permanent magnet motors with reasonable price and reliable operation.
  • (2) The development direction of light type. With the continuous development of rare earth permanent magnetic motors, more industries and fields require rare earth permanent magnetic motors, which require more light-weight and easy-to-carry. The products carried with electromechanical integration require good control performance and small volume, which can be adjusted by the change of frequency. At the same time, they also have the advantage of low-speed direct drive. These advantages can all be applied to medical devices, computers, electric vehicles, or the aerospace field. With the development of control technology and electronic technology in the future, rare earth permanent magnet motors also need continuous development and improvement.

Conclusion

Rare earth permanent magnet motor is a very promising product. Although in terms of current development, its degree of specialization should be continuously improved, its advantages and characteristics can promote its application in various fields.
Author: Yang Peng
Source: China Permanent Magnet Manufacturer – www.ymagnet.com
References:

  • [1] Zhou Liying. Research on application status and development trend of rare earth permanent magnetic motors J]. Xinhuanet, 2014,(08):31-32.
  • [2] Zhang Jingjing. Analysis of application status and development trend of rare earth permanent magnet motors [J]. Journal of Suihua University. 2015,(10):51-52.
  • [3] Yu Qi. Application status and development trend of rare earth permanent magnet motors [J]. Journal of Dalian University of Technology. 2015,(5):10-11.
  • [4] Ye Yunheng. Application status of rare earth permanent magnet motors [J]. The People’s University of China.
  • [5] Bi Hongqing. The Development Trend of rare earth permanent magnetic motors [J]. Journal of Dalian University of Technology. 2015,(5):10-11.
  • [6] Bai Pengfei. Application status and development trend of rare earth permanent magnet motors [J]. The People’s University of China.
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