Why has permanent magnet synchronous motor gradually become a research hotspot

The reason why permanent magnet synchronous motors have gradually become a research hotspot is mainly due to their various advantages and application prospects.

Firstly, permanent magnet synchronous motors have the characteristics of high efficiency and high power factor. Compared to traditional electrically excited motors, permanent magnet synchronous motors do not require excitation current, thereby reducing motor copper consumption and making them more efficient. In addition, due to the use of permanent magnet material poles, especially rare earth metal permanent magnets (such as neodymium iron boron), their magnetic energy product is high and they can obtain a high air gap magnetic flux density. Therefore, when the capacity is the same, the motor has a small volume and light weight.

Secondly, permanent magnet synchronous motors also perform excellently in thermal management and heat dissipation technology. Electric motors generate a significant amount of heat during operation, while permanent magnet synchronous motors generate less heat, resulting in a simple structure, small size, and low noise in the motor cooling system. In addition, researchers have been exploring efficient thermal management and heat dissipation technologies, such as using fluid cooling, heat pipe technology, and material thermal conductivity to improve the heat dissipation effect of permanent magnet synchronous motors, ensuring the stability and reliability of the motor under high-power operating conditions.

Furthermore, permanent magnet synchronous motors have excellent dynamic performance and reliability. It has a small moment of inertia, allows for a large pulse torque, can achieve high acceleration, a compact structure, and reliable operation. In addition, the permanent magnet synchronous motor allows for a large overload current, significantly improves reliability, and the entire transmission system is lightweight. The unsprung weight is also lighter than traditional wheel axle transmission, resulting in a higher power per unit weight.

Finally, the application prospects of permanent magnet synchronous motors are broad. With the progress of society and the development of technology, people's requirements for motor systems are becoming increasingly high, especially in areas with high performance requirements such as office equipment, simple digital machine tools, computer peripherals, and household appliances. Permanent magnet synchronous motors have been widely used due to their advantages of high efficiency and reliability. At the same time, permanent magnet synchronous motors have shown great potential in the areas of fully digital and intelligent equipment required for aerospace, as well as special processing equipment.

In summary, permanent magnet synchronous motors have gradually become a research hotspot due to their high efficiency, high reliability, excellent dynamic performance, and broad application prospects.