一种永磁同步电机电流直接反馈矢量控制

Improved simplified vector control based on current direct feedback for PMSM

为了避免经典矢量控制的复杂坐标变换,提出一种通过电流直接反馈而消去Clarke坐标变换的简化矢量控制方法,并在永磁同步电机(PMSM)的控制中进行研究。搭建简化的基于电机定子电流直接反馈的矢量模型(M2)和基于转子磁场定向电流直接反馈的矢量控制系统(M3)。通过仿真与经典矢量控制系统(M1)进行对比分析研究,仿真结果表明:M2和M3均具有经典模型M1的特性,而且M2在启动、变负载、变转速情况下均具有最快的响应速度,因而适合于对响应速度有严格要求的场合;M3的响应速度较慢,但其转速、转矩的动态超调最小,稳态性能也较好。综合以上分析可知,改进的电流直接反馈矢量控制较经典模型不仅略去了Clarke坐标变换,而且其速度和转矩响应均有所改善,使系统性能得到提高。

In order to avoid complex coordinate transformation for traditional vector control, a permanent magnet synchronous motor simplified vector control method based on current direct feedback was pro- posed. The simplified vector control model （M2 ） based on stator current direct feedback and current di- rect feedback vector control model （M3 ） based on rotor flux oriented were established. Comparing two models simulation with traditional vector control model （ M1 ）, it is showed that M2 and M3 have the same performance as M1, M2 has the fastest response in the starting, varying speed and torque states, so it is applicable to the quickly response occasion. Although M3 has slower response, it has the least dynamic o- vershoots of speed and torque and well static performance. The improved vector control model by current direct feedback not only omits the Clarke coordinate transformation, but also improves the vector control performance.