基于参数辨识的PMSM电流环在线自适应控制方法

摘要

In vector control system of PMSM,current controller performance will decline significantly because of changes in motor parameters,an on-line adaptive control of PMSM current-loop based on parameter identification is proposed.First stator resistance and permanent magnet flux linkage are identified using recursive least squares method with forgetting factor,and then d-q axis inductance are estimated using the same method base on the previous step,finally the PI parameters in real-time operating conditions could be obtained.Experimental results show that PI parameters can effectively adapt to change in working conditions and quickly achieve precise control of current.%针对永磁同步电机矢量控制系统中电流控制器性能因电机参数变化而下降的问题,提出了一种基于参数辨识的电流环在线自适应控制方法。利用带遗忘因子的递推最小二乘法对永磁同步电动机定子电阻和永磁体磁链进行在线辨识,然后利用得到的定子电阻和永磁体磁链对电机d-q轴电感进行在线估计,最后利用得到的辨识值计算出实时运行条件下的电流环PI参数值。实验结果表明采用本文方法计算所得的PI参数值能够在电机参数发生变化时快速实现电流的精确控制。