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内嵌式永磁同步电机改进型解耦控制

, PP. 30-37

Keywords: 内嵌式永磁同步电机,弱磁控制,参数辨识,解耦

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Abstract:

内嵌式永磁同步电机(IPMSM)具有好的转矩性能和宽的调速范围,但其电流控制器需要精确的参数模型,由于饱和效应影响,电感参数会随运行条件不同发生改变,控制器受耦合影响,系统容易出现速度及转矩超调、扰动等现象。为了提高IPMSM恒转矩及恒功率区的控制性能,本文设计了一种改进型电流解耦控制器。控制器基于模型参考自适应法对参数进行在线检测,检测系统加入了前馈及闭环反馈,保证了参数检测的准确性及鲁棒性。这种解耦电流控制器结构简单、紧凑,有效改善了控制性能。实验和仿真结果表明,这种改进型控制器能有效准确的实时在线检测参数,同时使得整个系统响应速度快、无超调、系统转速稳定无扰动现象,能明显地提升系统性能。

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