采用解析法推导出表贴式永磁同步电机径向电磁波的解析表达式,在此基础上求取了径向电磁力波分量的幅值、阶次和频率。分析了径向气隙磁密谐波对径向电磁力波的影响,提出了运用3p阶气隙磁密谐波削弱二倍频径向电磁力波,进而降低电机振动噪声的方法。建立有限元仿真模型对所提出的方法进行验证,证明了所提方法的正确性。

The analytical expression of radial electromagnetic force wave of surface-mounted PMSM was deduced by analytical method and the amplitude, order, frequency of radial electromagnetic force wave were gained based on above analytical expression. The influences of radial airgap flux density harmonic on the radial electromagnetic force wave were analyzed, it proposed that the 3pthorder airgap flux density harmonic could be used to reduce the doublefrequency radial electromagnetic force wave, resulting in lower noise and vibration. The finite element simulated model was established to prove the above method and the correctness of the method was validated.

TM 351