六相永磁同步电动机的预测电流控制

摘要

A deadbeat predictive current control strategy was adopted to Six Phase Permanent Magnet Synchronous Motor (SPPMSM),based on the space decoupling model of SPPMSM,the unified expression discrete model of SPPMSM was deduced for predicting the future two period current.For the proposed method affected flux parameter in the process of predicting the future current according to two previous cycle currents,the improved predictive current control was proposed,by separating the low frequency and high frequency current as the feedback variables to correct the error between the reference and feedback currents.The experiments validate the effectiveness of the proposed strategy,the influence of the strategy on harmonic currents was analyzed in depth.%针对六相永磁同步电动机提出一种无差拍电流预测控制策略,通过对空间解耦的六相永磁同步电机的数学模型进行离散化处理,利用离散化后的数学模型对未来两个周期的电流进行预测,实现对电流的无差拍预测控制.对PCC策略根据前两个周期的电流变化来对未来状态的预测,受磁链参数影响导致实际预测电流受反电动势的影响造成偏差,提出一种提取电流中的高频和低频分量形成反馈环节的方法,对预测电流的误差进行校正.实验验证提出的方法能有效消除参考电流与实际值之间的误差,并对预测电流控制对六相永磁同步电动机的谐波电流影响等进行了详尽的实验分析.