采用气隙不均匀改善永磁同步电机性能

Using Uneven Airgap to Improve Performance of Permanent Magnet Synchronous Motor

为使内置式永磁同步电动机稳定运转,本文选用转子偏心致使气隙不均匀来改善磁场波形,将齿槽转矩幅值下降。同时铁心损耗降低和输出转矩提高,电机的性能得到提高。基于Maxwell 2D对不同最大气隙δmax、最小气隙δmin组合对应的偏心距H进行扫描分析,得到齿槽转矩最小的偏心距H。再对比分析气隙均匀和不均匀时气隙磁场波形、输出转矩和铁心损耗,仿真结果表明合理的气隙不均匀可以改善电机性能。最终试制一样机,获得样机试验结果与Maxwell仿真值比照,误差小于8%,验证了Maxwell设计电机的高精度。

In order to make permanent magnet synchronous motor in smooth operation, the paper using the eccentric rotor structure to get the uneven air gap to improve magnetic field waveform. It can reduce the amplitude of cogging torque, decrease the core loss and improve output torque, so it can improve the performance of motor. The different maximum airgap 8 the minimum airgap 8mln assemblages corresponding to the eccentricity H. It based on maxwell to scan the different H to get the H of minimum cogging torque. And then the uneven airgap were compared in magnetic field waveform, get the output torque, the core loss, the simulation result. It shows the reasonable non-uniform airgap can improve motor performance. Finally, a prototype, obtained the test result. In contrast to the simulation values of Maxwell, the error rate is less than 8% , it verified the high precision Maxwell design of motor.