A Sequential Adaptive Control Strategy for the Contact Colliding Speed of Contactors Based on Fuzzy Control

In the making process of a contactor, the fast collisions of the movable contact and the static contact lead to the contact bounce, which greatly reduces the electrical life of the contactor. In this article, a neural network model is used to estimate the contact colliding speed and a fuzzy logic controller is designed with the contact colliding speed as the feedback. By controlling the excitation time of the contactor, the contact colliding speed successively approximates a given smaller reference value, thus, the contact bounce is inhibited. The results of the cosimulation show the theoretical feasibility of the proposed scheme. In addition, three contactors of different types are used for an experiment, and the results show that the reduction in the contact bounce time is more than 70% and that the proposed control strategy is universal.