Dual-redundancy fault tolerant permanent magnet motor control system

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.