以高精度无槽盘式永磁电机为研究对象,建立了电机三维电磁仿真模型。详细分析了该电机反电动势和转矩特性,避免由高次谐波引起的定、转子及永磁体涡流损耗,有效改善了电机的热性能,为进一步研究打下基础。建立了三维温度场仿真模型,分析了热源分布和传热过程,计算了电机在自然散热条件下温度的稳态分布。最后通过电机温升试验,验证了理论分析的正确性与合理性。

The high precision slotless disctype permanent magnet motor was studied. A threedimensional electromagnetic model of the machine was established. The back electromotive force and torque were analyzed. The eddy current losses of stator, rotor and permanent magnet caused by high order harmonics could be avoided. The thermal performance was improved and the foundation for further study could be provided. Then, the threedimensional temperature field model was built. The heat source distribution and heat transfer process were analyzed. The steady state temperature field distribution of the machine under natural heat dissipation condition was calculated. Finally, the validity and reasonability of the theoretical analysis were verified by the temperature rise experiment.

TM 351