电枢齿槽运动和换向电流对永磁起动机气隙磁通的影响

The influence of slots moving and the commutating current on the air-gap flux of PM starter motor

在转子旋转过程中，永磁起动机定、转子相对位置发生变化，技向元件中电流及气隙磁场分布随之发生变化，因而气隙磁通也发生了变化。永磁起动机属于低压、大电流电动机，电枢反应比一般永磁直流电动机强烈得多，因而气隙磁通的变化要大得多。利用电磁场有限元法分析了电枢齿槽运动和换向过程对气隙磁通的影响，讨论了电机有关参数对不同磁极结构永磁起动机气隙磁通波动的影响。

When the rotor of permanent magnet starter motor rotates, the relative position between stator and rotor changes, which results in the variation of electric current in the commutating coil and the distribution of air gap field. Being a kind of motor with lower voltage and larger current, the armature reaction of permanent magnet starter motor is more serious than that of the conventional permanent magnet DC motor, and thus the variation of magnetic flux. In this paper, the FEM is used to study the effects of slots moving and the commutating current on the air-gap flux, and also the effects of some construction data on the variation of magnetic flux for permanent magnet starter with different pole struCtures.