齿槽转矩在电动汽车永磁同步电机的磁钢退磁检测中的应用

Application of Cogging Torque in Demagnetization Detection of Permanent Magnet Synchronous Motor of Electric Vehicles

解析电动汽车永磁同步电机的磁钢退磁的原因,对磁钢失磁的检测方法作了简述,提出通过检测永磁同步电机齿槽转矩的变化,直接判定磁钢是否失磁及其失磁程度。

This article analyzes reasons for the demagnetization of magnetic-steel of permanent magnet synchronous motor of electric vehicle. The measuring method of magnetic loss of magnetic steel is briefly introduced. It is proposed to directly judge the magnetic steel demagnetization degree through the change of cogging torque on permanent magnet synchronous motor.