Aiming at the permanent magnetic actuator of 27.5 kV vacuum circuit breaker and in accordance with its operating characteristics

simulations of static and dynamic characteristics were developed on the basis of Ansoft and Matlab softwares. Firstly

a finite element model was established to obtain the static characteristics of the permanent magnetic actuator via Ansoft software package. Next

coupling voltage balance equation with D’Alembert’s mechanical movement characteristic equation

movement models of the circuit breaker with permanent magnetic actuator were constructed using Matlab package on the basis of static simulation

thus the movement characteristics of permanent magnetic actuator’s dynamic core and circuit breaker’s dynamic contacts were simulated and analyzed. Finally

a testing device was designed and an experiment was conducted in order to verify the simulation. The results show that the simulation coincides well with the experiment.