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Novel Method to Minimize the Air-Gap MMF Spatial Harmonic Content in Three-Phase Windings

机译：最小化三相绕组空气间隙MMF空间谐波含量的新方法

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摘要

Most of industrial induction motors currently used employ simple winding patterns, which commonly are designed to fulfil the fundamental magnetizing flux and torque requirements, disregarding the spatial harmonic content of the air-gap magnetomotive force (MMF). However, it is well known that the lower-order MMF spatial harmonics have a negative impact on the motor efficiency, vibration, noise, and torque production. The use of different turns per coil in the winding design is a possible solution to mitigate the problem. In this paper, a novel winding optimizing algorithm is fully described. The air-gap is modelled as a linear function of the current-sheet created by the conductors in the slots. Several winding patterns with different poles for stators with different slots are optimized, and the turns per coil pattern is presented in tables for single and double layer windings with optimal coil pitch shortening. These tables can be used, as reference, in winding design projects. An application example of winding optimization is also presented.
机译：目前使用的大多数工业感应电机采用简单的绕组图案，该模式通常旨在满足基本磁化磁通和扭矩要求，忽略气隙磁动力（MMF）的空间谐波含量。然而，众所周知，下级MMF空间谐波对电机效率，振动，噪声和扭矩产生具有负面影响。在卷绕设计中使用每条线圈的不同转弯是一种可能的解决方案来减轻问题。本文完全描述了一种新颖的绕组优化算法。空气间隙被建模为由槽中的导体产生的电流片的线性函数。优化了具有不同槽的定子的不同杆的几种绕组图案，并且每个线圈图案的转弯在单层绕组的表中呈现，具有最佳线圈间距缩短。这些桌子可以用作绕组设计项目的参考。还提出了绕组优化的应用示例。

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