基于双绕组永磁容错电机双余度控制系统研究

Dual-redundancy fault tolerant permanent magnet motor control system

基于双绕组永磁容错电机,对双余度电机控制系统进行控制策略分析。建立了系统的MATLAB仿真模型,包括电机本体模型、SVPWM、三相全桥逆变器、转速PI控制器、电流PI控制器五部分。仿真表明,该双余度控制系统能够实现恒转速与恒转矩模态切换。实验表明,在恒转速模式下改变转矩转速不变,在恒转矩模态下改变转速转矩保持不变。仿真及实验结果表明当系统发生断路故障时进行余度切换控制,故障态的输出功率和转速不变,实现容错控制。

In this paper,compared with traditional fault-tolerant system and traditional redundancy system,a control strategy of dual redundant motor system applied in fault tolerant permanent magnet motor with dual-winding is analyzed. A fault-tolerant permanent magnet machine of centralized winding is introduced,which has the property of physical insulation,magnetic flux and fault insulation. And vector control is adapted in this system. The Matlab simulation model is established which contains the motor model,SVPWM,speed controller,three-phase full-bridge inverter and current controller. The simulation results reveal that the constant speed mode and constant torque mode can be switched in the dual-redundancy control system. Experiment results show that the speed is constant when the load torque changes under constant speed mode,and the torque is constant when the speed changes under constant torque mode. Both the simulation and experiment results show that fault-tolerance control of the system is achieved when open-circuit fault occurs while maintaining the power and speed unchanged.