六相电流型交直交变频同步电动机电枢磁势及转子表面附加损耗的分析

Analysis of Armature MMF and Additional Loss on Rotor Surface of Six-phase LCI-fed Synchronous Motors

六相电流型交直交变频同步电动机不同于普通三相电机,除存在电机内在的时空谐波外(与三相同步电动机不同),还存在着变频电源注入的外加谐波。本文对六相电流型交直交变频同步电动机电枢磁势的分布情况和计算方法进行了系统的分析推导。并在磁势分析基础上,给出了六相电流型交直交变频同步电动机转子表面附加损耗的计算方法,以供工程应用。

Sixphase LCIfed synchronous motors are different from conventional threephase synchronous motor in many aspects. There are not only internal timespace harmonics (different from threephase synchronous motors), but also external additional harmonics coming from power supplier. A method of calculating armature MMF and its distribution on sixphase LCIfed synchronous motors is presented in this article. On the basis of armature MMF analysis, an approach to calculate additional loss on rotor surface of sixphase LCIfed synchronous motors is given.