车用永磁直流电动机齿槽转矩优化设计

Optimal design of cogging torque for vehicle permanent magnet DC motor

运用能量法和傅里叶分解法,针对车用永磁直流电动机的齿槽转矩产生机理,推导其齿槽转矩解析式。采用ANSYS Maxwell有限元仿真软件对永磁直流电动机进行二维瞬态磁场分析,通过有限元分析的方法研究不同槽口宽度和不等厚永磁体对永磁直流电动机齿槽转矩的影响。为样机齿槽转矩的优化提供一种合理的槽口宽度和不等厚永磁体组合。结果表明,该优化组合方案可以有效地削弱样机的齿槽转矩。

According to the generation mechanism of groove torque of permanent magnet DC motor,the analytical formula of groove torque was derived by using energy method and Fourier decomposition method.ANSYS Maxwell finite element simulation software was used to analyze two-dimensional transient magnetic field of permanent magnet DC motor.The influence of permanent magnets with different slot width and unequal thickness on the groove torque of permanent magnet DC motor was studied by finite element analysis method.It provides a reasonable combination of slot width and unequal thickness permanent magnets for the optimization of cogging torque of prototype machine.The results show that the optimized combination scheme can effectively weaken the cogging torque of the prototype.