气隙长度对转子齿谐波电动势的影响

Influence of Air Gap Length on Rotor Tooth Harmonic EMF

为了实现对齿谐波励磁的永磁同步发电机的优化设计,需要准确把握电机设计参数对转子齿谐波电动势的影响。首先阐述了该新型混合励磁发电机的结构和原理,定性分析了气隙长度对转子齿谐波电动势的影响,并采用电磁场有限元法进行了验证,结果表明:随着气隙长度的增加,转子齿谐波电动势逐渐减小。同时,针对计算结果的处理,得到了计算转子齿谐波电动势的拟合公式,根据拟合公式得到与其他气隙长度对应的转子齿谐波电动势,与有限元计算结果基本吻合,为该类齿谐波励磁的发电机优化设计提供了理论参考。

In order to realize the optimal design of permanent magnet synchronous generator using tooth harmonic for excitation, it is necessary to accurately grasp the influence of design parameters on the rotor tooth harmonic electromotive force（EMF）. Firstly elaborate the structure and principle of the new hybrid excitation generator and qualitatively analyze the influence of the air gap length on rotor tooth harmonic EMF, which is verified by the electromagnetic field finite element method. The results show that with the increase of air gap length the rotor tooth harmonic EMF decreases gradually. Mean- while, by the processing of the calculation results the fitting formula for computing the rotor tooth harmonic EMF is obtained. The rotor tooth harmonic EMF with other air gap length computed according to the fitting formula is consistent with the finite element calculated results, which provides the theory reference for the optimal design of the generator using tooth harmonic for excitation.