Simplified Analytical Model and Investigation of Open-Circuit AC Winding Loss of Permanent-Magnet Machines
Simplified Analytical Model and Investigation of Open-Circuit AC Winding Loss of Permanent-Magnet Machines
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DOI：
10.1109/tie.2013.2272284
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发表时间：
2014-09
影响因子：
7.7
通讯作者：
L. Wu;Z. Zhu
中科院分区：
文献类型：
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作者：
L. Wu;Z. Zhu
本文提出了一种基于一极一槽的表面贴装式永磁电机开路交流绕组损耗的简化分析模型，该模型考虑了齿尖的影响，但忽略了涡流的再分布效应。分析模型与有限元计算结果的比较表明，简化的分析模型与考虑所有槽的分析模型具有相似的精度。研究了各种设计参数，如导体布置、槽宽、槽口宽度、齿尖高度、磁极弧距比、齿尖与导体间隙等对绕组开路交流损耗的影响。结果表明，当周向导体层数大于1时，绕组开路交流损耗随径向导体层数的增加而逐渐减小，而无周向分割时，径向分割效果不明显。当周向层数从1变到2时，损耗大大降低，但当导体进一步周向分段时，损耗降低缓慢。
This paper presents a simplified analytical model based on one slot per pole for predicting the open-circuit AC winding loss of surface-mounted permanent-magnet machines accounting for the influence of tooth-tips but neglecting the redistribution effect of eddy currents. The comparison between the analytical models and finite-element results shows that the simplified analytical model has similar accuracy as the analytical model accounting for all slots together. The influence of various design parameters, such as conductor layout, slot width, slot opening width, tooth-tip height, magnet pole-arc to pole-pitch ratio, and gap between tooth-tips and conductors, on the open-circuit AC winding loss is investigated. It shows that the open-circuit AC winding loss gradually decreases with the number of radial conductor layers if the number of circumferential layers is larger than 1, although the radial segmentation is ineffective when there is no circumferential segmentation. The loss decreases greatly when the number of circumferential layers changes from 1 to 2, but reduces slowly when the conductors are further circumferentially segmented.