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永磁同步电动机电枢反应电抗计算方法研究与测试差异分析

, PP. 504-510

Keywords: 电枢反应电抗,交叉饱和,保存磁导率,永磁电机

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Abstract:

永磁同步电动机的电枢反应电抗参数不仅关系到电机性能的好坏,还与伺服系统的控制精度密切相关,本文基于有限元法研究永磁同步电动机电抗的计算方法,重点研究交叉饱和对电机电抗的影响规律。首先计算不考虑交叉饱和时的电枢反应电抗,然后把矢量法和保存磁导率法相结合,在考虑直、交轴磁路的交叉饱情况下计算电枢反应磁场,从而得到直、交轴电枢反应电抗随电机内功率因数角的变化曲线,最后通过迭代确定直、交轴电流值和直、交轴电枢反应电抗。通过对表面式和内置式永磁电机电枢反应电抗计算,研究不同转子结构下交叉饱和对电枢反应电抗的影响规律,并分析了产生这种影响的原因。最终对直、交轴电枢反应电抗的计算值和测试值进行对比并得出几条重要的结论。

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