多层分数槽集中绕组的谐波磁动势分析

Analysis of Harmonic Magneto-dynamic Potential of Multilayer Fractional Slot Centralized Winding

分数槽集中绕组的绕线工艺简单,有利于电机加工时绕组的模块化设计,但气隙谐波磁动势大的弊端使其在制造领域无法广泛应用。多层绕组结构通过改变绕组系数从而降低了气隙中的低次谐波磁动势。阐述了双层绕组结构下的槽电动势星形图与绕组接线图,分析了各次谐波的绕组系数。在双层绕组的基础上研究了一种多层绕组结构,推导了不同绕组结构之间绕组系数的关系。研究结果表明多层绕组的结构可有效抑制低次谐波磁动势。

The winding process of the fractional slot centralized winding is simple,which is conducive to the modular design of the winding during motor processing.However,the disadvantages of large air-gap harmonic magnetomotive force make it unable to be widely used in the manufacturing field.The multilayer winding structure reduces the low-order harmonic magnetomotive force in the air gap by changing the winding coefficient.The star diagram and winding wiring diagram of the slot electromotive force under the double-layer winding structure are expounded,and the winding coefficients of each harmonic are analyzed.On the basis of double-layer winding,a multi-layer winding structure is studied,and the relationship of winding coefficients between different winding structures is derived.The results show that the structure of the multilayer winding can effectively suppress the low-order harmonic magnetomotive force.