基于最优转矩控制六相永磁容错电机故障补救策略的仿真研究

为了满足航空电力作动系统高可靠性的要求,介绍了一种六相永磁容错电机驱动系统的拓扑结构。在介绍其结构特点的基础上,分析驱动电路电气故障,通过电路等效原理将功率管开路、短路和电机绕组短路故障转化为电机绕组开路故障,最后根据功率守恒原则,提出了基于最优转矩控制的故障补救策略,旨在当电机发生开路故障时,能够产生同正常运行时相同的输出转矩,以及最小的转矩脉动和铜耗。Matlab仿真结果表明当电机发生一相或两相开路故障时,系统输出转矩基本不变,从而验证了研究的最优转矩控制策略的可行性。

Research of Six Phase Fault Tolerant Permanent Magnet Motor Simulation Based on Optimal Torque Control

In order to meet the requirement of high reliability in air power actuation systems, a topology of six-phase fault tolerant permanent magnet motor drive system is introduced. Based on its structural features, the drive circuit electrical fault is analyzed, the fault of power device open or short and motor windings short can be transformed into the motor windings open by the equivalence principles. Finally, the optimal torque control method is proposed based on power conservation principles, aiming at providing the same output torque as it normally does, with minimum torque ripples and copper loss, when one phase or more than one phase open circuit fault occurs. All the matlab simulation results show that the system output torque are essentially the same when the motor windings are one phase or two phase open with the normal condition, then the feasibility of optimal torque control strategy in this paper.