采用新型磁性槽楔的永磁同步电机分析

Analysis of Permanent Magnet Snchronous Motor Using New Magnetic Slot Wedge

针对磁性槽楔能够改善电机气隙磁导波形,减小气隙磁密谐波,削弱电机齿槽效应,从而减小电机损耗和转矩波动,提高电机效率的优异特性,提出一种新型的叠片式磁性槽楔。该结构能够进一步优化开口槽电机的气隙磁密波形,降低齿槽转矩,减小电机损耗,同时又不会影响电机定子槽漏抗。本文用解析法分析磁性槽楔磁导率对于气隙磁密谐波以及定子槽漏抗的影响,通过一台130 kW的永磁同步电机模型,运用有限元仿真分析比较叠片式磁性槽楔与普通磁性槽楔的电气性能。

In view of the fact that the magnetic slot wedge can improve the motor air gap permeability wave­form,reduce the air gap magnetic density harmonics,weaken the motor cogging effect,thereby reducing the motor loss and torque fluctuations,and improving the excellent characteristics of the motor efficiency,a new type of Laminated magnetic slot wedge.This structure can further optimize the air gap magnetic density waveform of the open slot motor,reduce the cogging torque,reduce the motor loss,and at the same time will not affect the stator slot leakage resistance of the motor.In this paper,the effect of magnetic slot wedge per­meability on the air gap magnetic density harmonics and stator slot leakage reactance was analyzed analytical­ly.A 130kW permanent magnet synchronous motor model was used to compare the laminated magnetic slot wedge with finite element simulation analysis,electrical performance of ordinary magnetic slot wedge.