The controller design for permanent magnet motor with complete electrical double redundancy structure

In modern aerospace equipment, power transmission technology is replacing the traditional hydraulic and pneumatic transmission technology. Power transmission technology can be roughly divided into Electro-Mechanical Actuator (EMA), Electro Hydrostatic actuator (EHA) and Integrated Actuator Package (IAP) based on different structures, of which EMA is the most widely used. Motor servo system is the energy conversion device of EMA, redundancy technology is usually applied in motor control system to improve its working reliability. To enhance the reliability of the control system, this paper presents a dual-redundancy control strategy. The motor controller is analyzed using complete electrical double redundancy structure, and based on this structure we build the simulation model in Matlab/Simulink. The SVPWM control method is analyzed, fuzzy PID control algorithm is applied in the speed loop, and corresponding control rules are designed. In order to verify its working reliability and performance, specific experiments are designed. The fault monitoring and defective channel cut-out control strategy works when the current of one channel is abnormal. The tests indicate that the redundant control strategy makes motor control system operate well when one channel is abnormal and can improve the reliability of motor servo system.