Analytical investigation of open-circuit eddy current loss in windings of PM machines
Analytical investigation of open-circuit eddy current loss in windings of PM machines
复制标题
永磁电机绕组开路涡流损耗的分析研究
DOI：
10.1109/icelmach.2012.6350277
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Z. Zhu
中科院分区：
文献类型：
--
作者：
L. Wu;Z. Zhu
本文基于考虑齿尖的子域模型，在忽略涡流重分布效应的情况下，研究了表面贴装永磁电机绕组中的开路涡流损耗。研究了导体布局、槽宽、槽开口宽度、齿尖高度、磁极弧距比、齿尖与导体间隙、气隙长度等设计参数对永磁电机条形绕组开路涡流损耗的影响。结果表明，当环向导体层数为1时，径向分段导体对开路涡流分布和损耗没有影响，当环向导体层数大于1时，可以减小损耗。当周向层数从1层增加到2层时，涡动损失下降较大，但在此之后下降缓慢。通过有限元分析验证了涡流分布和焦耳损耗的解析预测。
This paper investigates open-circuit eddy current loss in the winding of surface-mounted permanent magnet machines, based on the subdomain model accounting for tooth-tips but neglecting the eddy current redistribution effect. 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, gap between tooth-tips and conductors, and air-gap length, on the open-circuit eddy current loss in the bar-shaped windings of permanent magnet machines is investigated. It is shown that radially segmenting conductors has no effect on the open-circuit eddy current distribution and losses if the number of circumferential conductor layers is 1, but can reduce the loss when it is larger than 1. The eddy loss exhibits a large drop when the number of circumferential layers is changed from 1 to 2, but shows slow reduction above this. The analytical predictions of eddy current distribution and joule loss are validated by finite element analysis.