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新型定子结构永磁同步电机弱磁调速性能分析

, PP. 86-93

Keywords: 永磁同步电机,分流齿,有限元分析,弱磁调速,恒功率调速比

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Abstract:

提出了一种用于弱磁升速运行的新定子结构永磁同步电机,这种电机每个定子槽内设置一对分流齿,它能减少磁路磁阻,增加有限的电枢磁动势产生的电枢磁通,束缚在分流齿中大部分电枢磁通,将抵消永磁励磁磁通与定子绕组匝链,控制定子绕组磁链,实现弱磁升速。建立了新结构电机的等效磁路,说明分流齿弱磁工作原理,并解释分流齿束缚电枢磁通并不削弱电机转矩输出的机理。对新定子结构电机进行了有限元分析,在此基础上研制了一台样机并进行了实验研究,实验结果和计算结果相吻合,验证了新定子结构永磁同步电机的弱磁性能。

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