绕组开路故障下的双三相永磁同步电机容错控制

针对汽车方向盘电动助力转向系统可靠性问题,基于双三相永磁同步电机(PMSM)研究了绕组开路故障下的容错控制策略。以一相绕组开路为例,通过推导出电机绕组开路时的坐标变换矩阵,建立了故障下的双三相PMSM d-q轴坐标系数学模型。在对电压方程进行解耦变换的基础上,设计了结合前馈补偿的电流调节器架构,研究了定子总铜耗最小的容错控制策略。仿真结果表明,所研究的控制策略改善了双三相PMSM绕组缺相后的运行性能。

Fault-Tolerant Control of Dual Three-Phase Permanent Magnet Synchronous Motors Under Open Winding Faults

For the reliability of the electric power steering system of the automobile steering wheel, the fault tolerant control strategy based on the dual three phase permanent magnet synchronous motors (PMSMs) under open winding faults is studied. A one phase open winding is used as an example. By deducing the coordinate transformation matrix when the motor winding is open, a mathematical model of dual three phase PMSMs under fault in the dq axis coordinate system is established. Based on the decoupling transformation of the motor voltage equation, a current regulator architecture with feedforward compensation is designed, and a fault tolerant control strategy with the minimum total loss of the stator is studied. The simulation results confirm that the control strategy can improve the performance of the dual three phase PMSMs under phase loss fault conditions.