Title :
Contact welding at break of motor inrush current
Author :
Schoepf, Thomas J. ; Rowlands, Robert ; Drew, George
Author_Institution :
Delphi Res. Labs, Shelby Township, MI, USA
Abstract :
The contact welding phenomena observed at automotive relays at switch-off of a DC motor load during startup was investigated. Contact welding occurred during the first operation and was caused by anodic arcs shorter than 80 microseconds at breaking inrush currents of up to 85 A. The switching performance of the type of relay investigated could be correlated with the parameters: over-travel, release time, and the break current.
Keywords :
DC motors; automotive electronics; circuit-breaking arcs; electric welding; electrical contacts; load (electric); relays; starting; switching; 85 A; DC motor inrush current; DC motor load; anodic arcs; breaking inrush currents; contact welding phenomena; startup devices; switch-off automotive relays; switching properties; Automotive engineering; Coils; Contacts; DC motors; Relays; Silver; Surges; Switches; Vehicle dynamics; Welding;
Conference_Titel :
Electrical Contacts, 2004. Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
Print_ISBN :
0-7803-8460-1
DOI :
10.1109/HOLM.2004.1353142
