LOW VOLTAGE APPARATUS ›› 2020, Vol. 594 ›› Issue (9): 13-17.doi: 10.16628/j.cnki.2095-8188.2020.09.003

• DC Electrical Research • Previous Articles     Next Articles

Analysis of Electric-Dynamic Repulsion Force Between Contacts of High Voltage DC Relay

YU Guofei, YUAN Zhonglin, ZHENG Xiang   

  1. School of Mechanical and Automotive Engineering,Xiamen University of Technology, Xiamen 361024, China
  • Received:2020-05-18 Online:2020-09-30 Published:2020-10-18

Abstract:

In order to solve the problem of contact failure caused by too much electric-dynamic repulsion force of high-voltage DC relay under the condition of large short-circuit current,the electro-magnetic field of high-voltage DC relay was analyzed through Ansoft Maxwell.The current density distribution,magnetic intensity distribution and the force of contact,conducting bridge and moving reed under different current were obtained.The influence of moving contact height,contact distance and moving reed structure on the electric repulsion force of moving reed components and parts were analyzed.The theoretical calculation of the electric repulsion force and the finite element electromagnetic field analysis were verified by the short-circuit current experiment.The error between the experimental results and the finite element simulation value is 2.35%.This provides the basis for the optimization design of high-voltage DC relay.

Key words: high voltage DC relay, electric-dynamic repulsion force, electro-magnetic field analysis, finite element analysis

CLC Number: