Research on a Novel Vacuum Contactor and its Displacement Control

The dynamic speed characteristic is a key parameter to measure the performance of the actuator. Displacement control technology can improve the dynamic characteristics of the actuator by controlling the coil current. This paper proposes a vacuum contactor based on a new type of actuator, and studies the displacement control technology on the basis of the new type of actuator. Displacement control requires real-time control based on dynamic displacement, so prediction of the actual displacement is required without the use of displacement sensors. Based on the parameter sweep function of the finite element software, two surfaces of flux linkage, electromagnetic force, displacement and current are established. Based on the dynamic parameters calculated by the interpolation model, the displacement prediction results of BP neural network and GABP neural network are compared. The prediction errors of different algorithms are analyzed. The results show that the GABP algorithm can accurately predict the displacement of the contactor. The predicted displacement in this paper can provide a theoretical basis for displacement control technology. Based on displacement prediction, control simulation is completed. The simulation results show that this control strategy can effectively reduce the final speed of the actuator, thereby reducing contact bounce.