Improved Analytical Calculation for 2D Current Displacement in Rectangular Conductors

2021 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME) Pub Date : 2021-10-07 DOI:10.1109/ICECCME52200.2021.9590855

Xi Zhu, C. Wohlers, B. Ponick

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Abstract

This paper describes an improved analytical closed calculation method for 2D current displacement effects in preformed windings in a rectangular stator slot of rotating electrical machines. In comparison to established analytical methods, the magnetic saturation of stator teeth and stator yoke, which can cause significant magnetic voltage drops in the iron core and significant longitudinal slot magnetic fields, is considered in the improved analytical calculation method presented in this paper. The horizontal and the longitudinal slot magnetic fields are determined using a magnetic equivalent circuit (MEC). The calculation of the copper loss and the loss ratio of the 2D current displacement is separated into a one-dimensional current displacement, which is caused by horizontal or longitudinal slot magnetic fields, and then combined again. Finally, a comparison to a finite element method (FEM) simulation of the total loss ratios of preformed windings in a rectangular stator slot validates the improved analytical calculation method.

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矩形导体中二维电流位移的改进解析计算

本文介绍了旋转电机定子矩形槽内预成形绕组二维电流位移效应的改进解析封闭计算方法。与已有的解析计算方法相比，本文提出的改进解析计算方法考虑了定子齿和定子轭的磁饱和问题，该问题会导致铁芯内显著的磁压降和显著的纵槽磁场。利用磁等效电路(MEC)确定水平和纵向槽磁场。将二维电流位移的铜损耗和损耗比的计算分离为一维电流位移，由水平或纵向槽磁场引起，然后再组合。最后，通过对矩形定子槽内预成形绕组总损耗比的有限元模拟，验证了改进的解析计算方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)

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