稀土永磁同步电动机转子温升探讨

Research on Rotor Temperature Rise of REPM Synchronous Motor

稀土永磁同步电动机在正常运行时,理论上转子无基波损耗,转子温升应该较低,但在实际中由于磁钢涡流损耗和谐波损耗等不可避免的问题引起转子发热,温升增大。针对作者研制的一台REPMSM在试验时出现转子温升过高现象,该文对转子结构、槽配合以及稀土永磁材料等进行分析,提出了降低转子温升的解决方法。通过实验可知,磁钢的涡流损耗对REPMSM的转子温升影响很大。

Theoretically, there aren＇t the fundamental wave loss on the rotor of REPMSM, so the rotor temperature rise should be low, but in actual because the magnet steel eddy current loss and the overtone loss and so on the inevitable question causes the rotor to give off heat, the temperature rise increases. The temperature raised great in the rotor of a REPM synchronous motor which is designed by the author. This article carries on analysis from multi-positions such as the rotor structure design, the trough coordination, the rare earth permanent-magnet material and so on, then proposes the ways to reduce the rotor temperature rise. Finally, through the experiment the magnet steel eddy current loss is known that is very big to the REPMSM rotor temperature rise influence.