斜槽对永磁同步电机径向激振力波及振动的影响

Analysis on Radial Exciting Force Wave and Vibration of Permanent Magnet Synchronous Motor with Skewed Slots

以1台16极96槽表贴式永磁同步电机(PMSM)为研究对象,对定子直槽和斜槽情况下的径向气隙磁密和径向电磁激振力波进行有限元分析。对直槽和斜槽的空载振动进行谐响应分析,相关试验验证了仿真分析的正确性。分析结果表明:空载振动频率与激振力波频率为对应关系,通过斜槽可以有效降低低阶激振力波幅值,尤其是槽数阶次力波,有效地降低电机振动。

Finite element simulation was adopted to analyze the radial air gap flux density and the radial electromagnetic exciting force wave of a 16-slot 96-pole surface mounted permanent magnet synchronous motor (PMSM) under the straight and skewed slots couditions. The no-load vibration of these two structures was simulated through coupled harmonic response analysis. The accuracy correctness of the simulation was proved by experiment. The expecnnest result showed that the no-load vibration frequency matched the frequency of the force wave. The amplitude of the low-order force wave especially whose order equalled the slot number could be effectively reduced by using skewed slots, and the vibration of the PMSM was effectively reduced as well.