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永磁同步电机矢量控制双滑模模型参考自适应系统转速辨识

DOI: 10.13334/j.0258-8013.pcsee.2014.06.010, PP. 897-902

Keywords: 永磁同步电机,双滑模,模型参考自适应系统,无速度传感器,转速辨识

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Abstract:

编码器的使用降低了永磁同步电机矢量控制系统的可靠性和耐用性,且某些场合无法安装编码器。理论上可以通过永磁同步电机的电压和电流实时计算出电机的转速和转子位置角度。该文提出了一种基于双滑模模型参考自适应系统(modelreferenceadaptivesystem,MRAS)的永磁同步电机无位置传感器控制策略。其中,参考模型为永磁电机本身,可调模型为永磁电机电流模型。利用两模型输出的偏差构造了2个滑模面,将通过滑模算法获得的等效控制进行运算即可获得电机的转速和转子位置角度,并分别用于矢量控制系统的速度调节和坐标变换。在理论分析的基础上进行了仿真研究,仿真结果表明所提出的观测方法是有效的。

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