The detection method of inter-turn short-circuit current of in-phase coil compensation axial permanent magnet synchronous fault-tolerant motor

With the development of aerospace, electric propulsion ships, and new energy vehicles which have extremely demanding requirements for safety and reliability, the requirements for the safety and reliability of their internal drive motors are becoming higher and higher. The motor is required to operate fault-tolerant and maintain the original output capacity in the event of sudden operation faults, and stator winding inter-turn short-circuit fault (ITSCF) is a frequent fault. An automatic fault-tolerant permanent magnet synchronous motor (PMSM) for ITSCF is proposed to solve the problem of motor torque decline and three-phase current imbalance when ITSCF occurs. Aiming at this special motor, an inter-turn short circuit current detection method is proposed. This paper introduces a special structure of this motor. The short circuit current and number of turns are obtained by adding additional coils and analyzing the leakage magnetic circuit of the motor. Then the finite element model is established by ANSYS, and the short circuit situation with different turns is simulated to verify the correctness of the experiment.