摘要
提出一种容错矢量控制,实现了具有非正弦反电动势的表贴式五相永磁同步电机(permanent-magnet synchronous motor,PMSM)在发生一相开路故障后的无扰稳定运行。首先,基于保持故障后基波磁动势和永磁体基波磁链矢量在空间上圆形旋转的原则,构造故障后电机的解耦数学模型。其次,采用谐波电流注入法减小由转子三次谐波磁场引起的二次和四次转矩脉动。再次,推导同步坐标系下令转矩脉动为零的电流参考值的一般表达式,并求得令电机绕组损耗最小的最优电流参考值。该方法可在线实时计算并且具有普适性,易于推广到具有任意三次谐波含量的五相PMSM的容错运行控制系统中。仿真和实验结果表明,所提方法可有效地降低故障后转矩脉动,并获得比传统容错矢量控制更小的电机绕组损耗。
A fault tolerant field oriented control(FOC)was proposed for five-phase permanent magnet synchronous machine(PMSM)with non-sinusoidal back electromotive force(EMF)under single phase open fault.The decoupled model of five-phase PMSM under single-phase open-circuit fault is based on the concept of preserving the circular rotation of fundamental magnetic motive force and PM flux linkage.In order to suppress the torque ripples caused by third harmonics of air-gap flux,the closed solution of current references with zero torque pulsation at the synchronous coordinate was presented.The presented solution was derived to obtained optimum current references to achieve lowest stator winding loss.The optimum solution can be generated in real time and is universal to be extended to other five-phase PMSM with non-sinusoidal back EMF.The simulation and experimental results confirm that the proposed method can effectively suppress the torque ripple and achieve lower stator winding loss compared with traditional fault tolerant FOC method.
作者
熊聪
许海平
周鹏
关涛
XIONG Cong;XU Haiping;ZHOU Peng;GUAN Tao(University of Chinese Academy of Sciences,Shijingshan District,Beijing 100049,China;Key Laboratory of Power Electronics and Electric Drive(Institute of Electrical Engineering,Chinese Academy of Sciences),Haidian District,Beijing 100190,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第23期7055-7064,共10页
Proceedings of the CSEE
关键词
五相永磁同步电机
容错矢量控制
单相开路故障
非正弦反电动势
通用解析解
five-phase permanent-magnet synchronous motor(PMSM)
fault tolerant field oriented control(FOC)
single-phase open-circuit fault
non-sinusoidal back electromotive force(EMF)
universal closed solution
