Design of 3-D Interpenetrating Contact Bounce Suppression Parameters During Contactor Closing Process Based on Improved Particle Swarm Algorithm

To better suppress contact bounce during the closing of contactor, this article proposes a strategy that combines altering the contact structure to increase the absorption of collision energy loss with improving the particle swarm optimization (PSO) algorithm to adjust the attraction and repulsion forces of the contactor. A contact collision bounce model of the closing contactor is established to simulate the motion characteristics of the contact closing process. Based on the analysis of contact collision energy loss, a stress–strain behavior analysis is conducted on 3-D interpenetrating Cu–W contacts with rhombic dodecahedron (RD) and cube (CB) skeletons. In the parameter design objective function, contact bounce time and iron core closing time are used as parameters. To address the potential local optimum issue of the PSO algorithm, this article automatically adjusts the inertia weight, adds braking operators to control the search speed, and introduces instantaneous impulse to avoid the local optimum issue of the PSO. The results show that under the improved PSO algorithm’s parameter design, the bounce times of commercial contacts, CB contacts, and RD contacts have been reduced by 14.13%, 28.92%, and 36.96%, respectively, demonstrating the effectiveness of the proposed method. The results presented provide guidance for the application design of new 3-D interpenetrating Cu–W contacts in contactors.