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新型整距绕组双凸极永磁电机工作原理及特性

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Keywords: 整距绕组,双凸极,磁通切换,双极性,单极性,永磁电机

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Abstract:

提出了一种新型整距绕组双凸极永磁(DSPM)电机,分析了其工作原理,通过有限元方法计算4/6极整距绕组电机的磁场并对电机磁链、反电动势、电感及转矩等特性进行的分析表明,整距绕组DSPM电机具有双极性的磁链,在不改变结构的情况下电机的输出功率与集中绕组DSPM电机相等,可以减少铜导体用量,提高运行效率。在此基础上提出了两种增加整距绕组DSPM电机输出功率的方法,并对改进的三相24/10极整距绕组DSPM电机的反电动势进行了理论分析和实验研究,所得结果不仅证明了本文理论分析的正确性,而且首次揭示了磁通切换型永磁(FSPM)电机本质上就是一种整距绕组双凸极永磁电机,FSPM电机其功率密度高的内在原因并非磁链的双极性,而是多用了永磁材料,增强了气隙磁密。同时也说明了新型整距绕组DSPM电机较传统的集中绕组DSPM电机具有更高的做功能力。

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