Static characteristic analysis and control technique of a new permanent magnetic operating mechanism

The typical permanent magnetic operating mechanism (PMOM) for high-voltage circuit breaker is an electromagnetic driving and permanent magnetic keeping actuator, which is easy to accelerate but hard to decelerate. In order to achieve better performance, a new permanent magnetic operating mechanism (NPMOM) is designed. The NPMOM is a permanent magnetic driving and permanent magnetic keeping actuator. The NPMOM´s static characteristic is analyzed by equivalent magnetic circuit method. For the sake of obtaining good opening and closing abilities, an H-bridge control circuit is design and control strategy is given. Compared with the typical PMOM, the NPMOM is easier to decelerate with less energy consumption and higher driving efficiency.