Permanent magnet motor operating mechanism with 40.5kV vacuum circuit breaker

A novel motor operating mechanism is presented which applied in the high voltage circuit breaker. The new motor is a permanent magnet motor with limited angle and only working in the starting stage. Based on the requirement of high voltage circuit breaker, the structure and parameters of motor are designed. The dynamic simulation of permanent magnet motor are achieved by employing the finite element method. The prototype of motor and drive control system are developed, established the performance testing system, and completed the dynamic characteristics testing. Finally, the winding current and angle of driving motor are obtained through the performance testing with the circuit breaker. The results indicate that the permanent magnet motor have a good mechanical characteristics and reach the operation of high voltage circuit breaker.