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[摘要]
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。
[Key word]
[Abstract]
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 d-q 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.
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