低共模干扰的永磁同步电机驱动系统模型预测控制  

Model Predictive Control of Permanent Magnet Synchronous Motor Drive System With Low Common Mode Interference

作　　者：申科[1] 郎朗 刘卫国[1] 赵丹[1] SHEN Ke;LANG Lang;LIU Weiguo;ZHAO Dan(School of Automation,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]西北工业大学自动化学院,西安710129

出　　处：《微电机》2020年第5期40-44,共5页Micromotors

基　　金：国家自然科学基金(51507142);中央高校基本科研业务费专项资金资助项目(3102019ZDHKY10)。

摘　　要：为了解决永磁同步电机驱动系统中传导共模干扰问题,本文提出一种降低系统共模电压的主动抑制方案。在传统的模型预测控制方法基础上提出一种新型改进方法,该方法避免使用零矢量,并且从系统延时和开关频率方面做了相应的优化措施。针对系统延时引起的控制性能下降现象,采用了延时补偿策略以改善传统模型预测控制的预测精度。设计了优化的矢量选择方法,仅允许特定的电压矢量参与代价函数的计算与比较,可以降低控制器的运算负担,同时也避免了因任意开关状态之间的切换造成的开关频率增加。时域及频域的仿真结果表明,该方法能有效降低永磁同步电机系统中三相逆变器输出侧的共模电压,实现开关频率和定子电流纹波的减小。In order to solve the problem of conducted common mode interference in permanent magnet synchronous motor(PMSM)drive system,this paper proposed an active suppression scheme to reduce the common mode voltage(CMV)of the system.Based on the traditional model predictive control(MPC)method,an improved method was proposed,which avoided the use of zero vectors and made corresponding optimization measures in terms of system delay and switching frequency.In order to improve the control performance degradation caused by system delay,delay compensation was adopted to improve the prediction accuracy of traditional MPC control.An optimized vector selection method was designed to allow only certain voltage vectors to participate in the calculation and comparison of the cost function,which reduced the computational burden of the controller and avoided the increase of the switching frequency caused by the switching between arbitrary switching states.Simulation results in time domain and frequency domain show that this method can effectively reduce the common mode voltage and switching frequency generated by three-phase inverter in permanent magnet synchronous motor system.

关 键 词：模型预测控制 共模干扰抑制 三相逆变器 永磁同步电机 

分 类 号：TM341[电气工程—电机] TM351