基于模型预测控制的永磁同步电机共模电流抑制方法

摘要

永磁同步电机(PMSM)驱动系统共模电流较大,其大小受控制方法的直接影响.建立PMSM预测模型,在此基础上提出一种简化的基于性能指标评估函数的模型预测直接转矩控制,并详细阐述了预测算法实施过程.然后分析电机系统共模电流产生机理,提出利用基于性能指标评估函数的模型预测直接转矩控制抑制共模电流.最后,对所提方法进行了仿真验证,并与传统直接转矩控制方法进行了详细对比分析,结果表明了所提方法的可行性和有效性.%The common mode current in the drive system of permanent magnet synchronous motor (PMSM) is large,which is mainly affected by the control method.Firstly,prediction model of PMSM was established,and a simple model predictive direct torque control (MPDTC) method was proposed for PMSM based on performance evaluation function.And the implementation process of the prediction algorithm of simple MPDTC was described in detail.Secondly,The generation mechanism of system common mode current was analyzed,and the MPDTC based on the performance evaluation function was proposed to suppress the common mode current.Finally,simulation experiments of the proposed MPDTC were carried out and the comparison of MPDTC and DTC were conducted.The results showed that the proposed MPDPC was able to suppress common mode current.