SIMULATION ANALYSIS AND EXPERIMENTAL RESEARCH OF OPERATING CHARACTERISTIC FOR MOVING CONTACT OF CONTACTOR WITH PERMANENT MAGNET ACTUATOR

According to single coil and single stable position contactor with permanent magnet actuator, the static and dynamic behavior is studied by simulation and experiment simultaneously. Firstly, with the use of ANSYS software package, the static attraction force acting on the moving core of contactor is simulated with FEM model. Secondly, by coupling of the electrical and mechanical differential equations which describe the dynamic behavior of permanent magnet actuator, the dynamic attraction force acted on the moving core is obtained on the base of above static simulation. Thirdly, by constructing the mechanical model of contact system and permanent magnet actuator, the displacements of moving contact and moving core versus time while contactors’ closing are also simulated based on ADAMS software package. Finally, the testing equipment is designed, and the experiment is conducted in order to evaluate simulation’s accuracy, it is indicated that simulation results coincide well with that of experiment.