Rotor optimization of high-dynamic response permanent magnet synchronous motor

Motor drive operation mechanism of High-Voltage Circuit Breaker(HVCB) need permanent magnet synchronous motor(PMSM) with high-dynamic response. Reducing the rotor inertia of PMSM is one technique to realize high dynamic response of the motor. By digging holes in the rotor, the inertia can be reduced. The influence of shape, position and size of inertia-reducing holes on the performance of PMSM is analyzed by using Ansoft. The optimized design of a given PMSM is presented in this paper. The rotor inertia is reduced by 10% after optimization.