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电动汽车用IPMSM直接转矩控统效率优化

, PP. 42-48

Keywords: 内置式永磁同步电动机,直接转矩控制,效率优化,电动汽车

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Abstract:

为提升电动汽车续航里程,提出一种车用内置式永磁同步电动机（IPMSM）直接转矩控制系统的在线效率优化方法。首先分析IPMSM的铜损和铁损,并将控制器损耗归入铜损,以全面考虑IPMSM驱动系统的电磁损耗。同时推导了铜损和总电磁损耗随定子磁链变化规律,并在此基础上,得到一种适用于电动汽车频繁变速运行的分区式效率优化方法。该方法利用离散化思想,根据转速和转矩将电动机运行范围分为不同区间,并在各自区间内单独作寻优搜索。所述方法对寻优算法依赖性小,实验结果验证了该在线效率优化方法的有效性和可行性。

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