A Torque Efficiency Optimization Method for Dual Five-phase PMSMs Coaxial Drive System under Shaft Phase Deviation

In dual five-phase permanent magnet synchronous motor (PMSM) in series coaxial drive system supplied by a single inverter, in order to solve the efficiency reduction of output torque and power distribution between two motors caused by the shaft phase deviation (SPD) fault. This paper proposes a output torque optimized compensation method with repositioning the angle of control system to improve torque output efficiency, and achieve balanced torque of two motors. Solving the problem of torque difference between motors in series, which avoid the continuous deterioration of SPD fault, and improve the safety and reliability of system when debugging and fault-tolerant operation. The method proposed is verified by experiment and simulation.