Investigation of the Contact Welding Failure Phenomena in the Electrical Endurance Experiments
Contact welding failure phenomena, always occurred in the electrical endurance test, can be the enormous obstacle for electromechanical relays with long electrical life and high reliability.Contact welding correlates with the mechanical switching process (including bounce, breaking velocity and contact force and so on) and electrical erosion of material closely.In this paper, the degradation process of static contact force, contact resistance and sliding distance of contacts under resistive load and inrush load in the electrical endurance experiments is compared explicitly.Combining with the SEM pictures of the failed contacts, the physical mechanism of contact welding is proposed.The in-situ simulation experiment method and conclusions are useful for the fault prediction of relays the optimization of contact materials.
Electromagnetic relay Contact welding electrical performance simulation Failure reproduction Failure analysis
Wanbin Ren Xu Zhang Yide Cai Zhe Zheng
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, 150001, China
国际会议
江苏苏州
英文
145-150
2019-11-04（万方平台首次上网日期，不代表论文的发表时间）