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一种改进的永磁同步电机SVM-DTC控制方法

Keywords: 永磁同步电机,直接转矩控制,空间矢量调制

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Abstract:

永磁同步电机传统DTC控制方法由于采用滞环控制方式导致电机转矩和磁链脉动较大,而SVM控制方法基于对转矩和磁链误差的精确补偿从而能够有效降低二者的脉动,但传统SVM控制方法包含了转速和转矩角两个PI调节器,两个调节器的参数设计比较复杂,也直接影响了电机性能.本文从DTC控制转矩角这一本质出发,提出了一种改进的SVM控制方法,通过动态调整转矩角调节器的输出限幅值即可实现对电机转矩的高性能控制,从而省去了复杂的PI参数调试过程.仿真结果验证了所提控制方法的正确性和有效性.

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