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表面埋入式永磁电机磁场解析

DOI: 10.13334/j.0258-8013.pcsee.2015.03.026, PP. 710-718

Keywords: 表面埋入式永磁电机,精确子域模型,分数槽集中绕组,交替极转子

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Abstract:

准确计算永磁电机的气隙磁场分布是设计、优化电磁性能的关键。该文在二维极坐标平面内建立表面埋入式永磁电机的精确子域解析模型,求解区域划分为定子槽子域、气隙子域和转子槽子域,根据分离变量法求解各子域的矢量磁位通解,并利用各子域之间的边界条件得出相关谐波系数。模型考虑了普通/交替极转子结构,永磁体径向/平行充磁方式,隔齿绕/全齿绕两种形式的分数槽集中绕组,可计算电机空载磁场、电枢磁场和负载磁场分布。以一台40极48槽交替极转子结构永磁电机为例,将气隙磁密波形的解析计算结果与二维有限元结果相比较,验证了解析模型的准确性。

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