Research on mechanical characteristics monitoring system for high-voltage circuit breaker motor operating mechanism

The mechanical properties monitoring system of permanent magnet motor operating mechanism is developed base on the indoor 40.5 kV vacuum circuit breaker in order to improve the security and reliability of power system. The high-precision linear displacement sensor is used to measure the stroke of moving contact, the angular sensor is employed to test the rotation angle of motor, and the hall current sensor is fit for detect the current of armature winding. The digital signal processor (DSP) is designed as the core of the monitoring system and the detection methods of mechanical characteristics are analyzed by considering the principles of the sensor and the signal translation circuit The mechanical parameters of circuit breaker are gained through debugging and running, which it can achieve the function of high precision real-time monitoring of circuit breaker and provide a data platform for the control of operating mechanism in the next step.