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A novel experimental evaluation method of welding characteristics for contact materials

  • Xu Zhang
  • , Wanbin Ren*
  • , Duanlin Jiang
  • , Yinghua Fu
  • , Yide Cai
  • *Corresponding author for this work
  • School of Electrical Engineering and Automation, Harbin Institute of Technology
  • GA Electronics Ltd. Co.
  • Chixi Technology Co.

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Contact welding failure considerably influences the electrical lifetime and reliability of electromechanical switching devices. Also, the welding characteristics correlate closely with physical properties of contact materials, contact force, current level and duration. In this paper, a novel experimental method for reoccurring the welding phenomenon between two closed contacts is proposed. And the welding force and associated welding trace are measured simultaneously. Furthermore, the effects of current load and static contact force on the welding characteristics of different contact materials (Ag, Cu, AgSnO2 and AgNi) are investigated explicitly. Finally, a modified mathematical model for calculating threshold welding current of elastic contact is proposed.

Original languageEnglish
Title of host publication30th International Conference on Electrical Contacts, ICEC 2020 - Proceedings
PublisherElectrosuisse, Verband fur Elektro-, Energie und Informationstechnik
Pages9-15
Number of pages7
ISBN (Electronic)9783907255117
StatePublished - 2021
Externally publishedYes
Event30th International Conference on Electrical Contacts, ICEC 2020 - Virtual, Online, Switzerland
Duration: 7 Jun 202111 Jun 2021

Publication series

Name30th International Conference on Electrical Contacts, ICEC 2020 - Proceedings

Conference

Conference30th International Conference on Electrical Contacts, ICEC 2020
Country/TerritorySwitzerland
CityVirtual, Online
Period7/06/2111/06/21

Keywords

  • Contact welding
  • contact force
  • threshold welding current
  • welding force
  • welding trace

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