电动汽车用内置式永磁同步电动机的优化

Optimization of Built-in Permanent Magnet Synchronous Motor for Electric Vehicles

采用有限元分析的方法,对电动汽车用内置式永磁同步电机的隔磁槽拓扑结构进行了优化,改善了漏磁现象,提高了气隙磁密;通过转子斜极的方法降低了空载反电势的谐波分量,提高了波形的正弦度;在此基础上基于遗传算法以额定转矩和永磁体体积最小为目标进行全局优化,节约了永磁体的用量,降低了电机的生产成本。优化过程对提高电动汽车用内置式永磁同步电机性能具有参考作用。

By means of finite element analysis,the topological structure of permanent magnet synchronous motor(PMSM)used in electric vehicles was optimized to improve the magnetic flux leakage phenomenon and the air gap flux density.The harmonic content of the no-load inverse potential was reduced and the sine of the waveform was increased by the method of rotor pole.On this basis,the global optimization was carried out with the aim of minimizing the rated torque and the volume of permanent magnet based on genetic algorithm,which saved the consumption of permanent magnet and reduces the production cost of motor.The optimization process can be used as a reference to improve the performance of the built-in Permanent magnet synchronous motor for electric vehicles.