Electro-Magnetic Coupling Demagnetization Assessment of Double Stator Vernier Permanent Magnet Motor Considering Short-Circuit Fault

This paper proposes an electro-magnetic coupling demagnetization assessment method for double stator vernier permanent magnet (DS-VPM) motor, in which influence of short-circuit fault are considered comprehensively. In order to evaluate motor demagnetization characteristics under short-circuit accurately, a dynamic demagnetization investigation method is also proposed, in which electrical circuits and magnetic field are combined simultaneously. By considering the transient d-axis and q-axis currents of the motor during fault conditions, the PM working point can be determined, enabling an analysis of its impact on motor performance. Finally, the effectiveness of the proposed demagnetization analysis method is validated through simulation. This lays the foundation for quickly and accurately verifying the anti-demagnetization characteristics of the designed motor.