Magnetic field calculation and dynamic behavior analyses of the permanent magnetic actuator

Abstract

Due to its great advantages, the permanent magnetic actuator for a vacuum circuit breaker drew great attention from engineers all over the world. We present the magnetic field and dynamic behavior analyses for the permanent magnetic actuator using finite element method associated with parametrization, for calculating the displacement of the moving parts and the supply current when the actuator is DC voltage supplied or capacitor supplied. In this analysis, the magnetic, electric and mechanical phenomena are coupled and some curves reflecting the dynamic behavior obtained. In addition, the comparison of dynamic behavior between DC voltage supplied and capacitor discharge supplied is drawm.