摘要：永磁同步电动机具有转矩波动小、控制精度高的特点，特别适合于电动汽车。齿槽转矩是转矩波动重要的组成部分。基于Maxwell有限元软件建立电机模型，采用不均匀气隙设计和转子铁心合理的挖孔措施来改善气隙磁场波形，消弱齿槽转矩和增大输出转矩，这样可以提高电机的响应速度的目的。最后，通过试制样机，对测试值与仿真值进行对比，论证了Maxwell仿真设计的正确性。

关键词：永磁同步电动机；电动汽车；Maxwell：齿槽转矩；仿真
Abstract: With a small torque ripple, high control accuracy of permanent magnet synchronous motor, especially suitable for electric vehicle. Cogging torque is one of the important parts of torque fluctuation .The motor model was established based on the finite element software Maxwell ,using the non-uniform air gap design and rotor reasonable hole measures to improve the waveform of air gap magnetic field to weaken cogging torque and increase the output torque,which can improve the response speed of the motor .Finally, a prototype through, the test values were compared with the simulation values,proved the correctness of simulation and design of Maxwell.

Key words: permanent magnet synchronous motor；electric vehicle ；Maxwell；cogging torque；simulation