五相永磁同步电机磁链矫正容错控制策略  

Fault-tolerant Control Strategy of Flux Correction for Five-phase Permanent Magnet Synchronous Motor

作　　者：李凤祥[1] 贾军成 汤军 LI Fengxiang;JIAJuncheng;TANG Jun(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《电气传动》2022年第1期40-45,共6页Electric Drive

摘　　要：针对五相永磁同步电机出现两相开路故障时系统电磁转矩及转速脉动大、动态响应差,且利用空间电压矢量调制技术(SVPWM)推导过程又极其复杂的问题,提出了一种磁链矫正容错控制策略。该策略在正常运行模式下克拉克变换矩阵的基础上推导出两相开路故障模式下的推广克拉克变换矩阵,计算出两相静止坐标系下的定子磁链表达式。对比正常运行状态下的磁链表达式,设计相关系数,使其恢复到正常运行状态,从而间接控制磁动势。采用直接转矩控制技术实现电机转矩和磁链控制。仿真结果表明该方法能够平缓故障状态下的转矩和转速、实现电机的容错运行。For the five-phase permanent magnet synchronous motor with two-phase open-circuit fault,the system has large electromagnetic torque and speed pulsation,poor dynamic response,and the problem that the derivation process using space voltage vector modulation(SVPWM)is extremely complicated.A fault tolerant control strategy for flux correction was presented.Based on the Clarke transformation matrix in normal operation mode,the extended Clarke transformation matrix in two-phase open-circuit failure mode was derived,and the expression of stator magnetic chain in two-phase static coordinate system was calculated.By comparing the expression of magnetic chain in normal operation state,the correlation coefficient was designed to restore it to normal operation state,so as to indirectly control the magnetic momentum.Direct torque control(DTC)technology was used to control the motor's torque and magnetic chain.The simulation results show that this method can smooth the torque and rotating speed under the fault state and realize the fault tolerant operation of the motor.

关 键 词：五相永磁同步电机 多相故障 容错控制 磁链矫正 直接转矩控制 

分 类 号：TM351[电气工程—电机]