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电动汽车用异步电机转子磁链定向校正算法研究

, PP. 11-18

Keywords: 定子电流,定子磁链,点乘,死区,异步电机,电动汽车

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Abstract:

异步电机参数受温度、励磁等的影响,导致基于转子磁链定向的矢量控制系统定向出现偏差。基于无功功率的算法虽然可以实现定向校正,但其校正准确度受死区的影响。为此,提出了一种改进的算法,即采用定子电流与定子磁链的点乘闭环来校正磁链定向,可以不受死区影响,提高了定向校正准确度。然而,该算法的稳态准确度受定子电感的影响,因此,设计了简单的补偿算法。理论分析和实验结果验证了该算法的有效性。

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