分数槽集中绕组感应电机非主导极次谐波磁动势抑制方法

针对分数槽集中绕组感应电机非主导极次谐波含量较高的问题，提出了通过设置分数槽集中绕组结构的补偿绕组抑制非主导极次谐波的方法。首先分析了不同槽极配合下分数槽集中绕组各数次谐波磁动势分布规律。然后根据主导极次谐波和谐波含量较高的非主导极次谐波在轴线位置处的不同分布情况，设计了两种不同的补偿绕组排布方式。最后，通过理论计算和有限元仿真，验证了该方法可以有效抑制谐波含量较高的非主导极次谐波，并且保留了集中绕组齿间独立性高的特点。

Method for Suppressing Non-Dominant Pole Log-Harmonic Magnetomotive Force in Fractional Slot Concentrated Winding Induction Machines

In order to solve the problem of high content of non-dominant pole log-harmonic in fractional slot concentrated winding induction machine, a method of suppressing non-dominant pole log-harmonics by setting up compensation windings of fractional slot concentrated windings structure is proposed. Firstly, the distribution law of each harmonic magnetic potential of the fractional slot concentrated winding with different slot-pole coordination is analyzed. Then, according to the different distributions of the dominant pole log-harmonic and the non-dominant pole log-harmonic with higher harmonic content at the axis position, two different compensation winding arrangements are designed. Finally, through theoretical calculations and finite element simulations, it is verified that the method can effectively suppress the non-dominant pole log-harmonics with high harmonic content, and retain the characteristics of high phase independence of the concentrated windings.