Experimental system research on permanent magnet motor operating mechanism of high voltage circuit breaker

The prototype of limited angle permanent magnet motor and the performance testing are researched based on the mechanical property requirements of 40.5kV vacuum circuit breaker. The system of performance testing is accomplished according to the permanent magnet motor and circuit breaker. Sensors with high precision are selected, and the circuit and method of testing are designed. The mechanical characteristics of permanent magnet motor (such as the angle, armature current) and stroke curve of moving contact are obtained by using the testing system. The testing results are indicated that the permanent magnet motor operating mechanism can provide a high average speed and fast response time, which is matched with the operating requirement of circuit breaker and offer a reliable date for high voltage circuit breaker adapted motor operating mechanism.