|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
Pre-Conditioning Automotive Relay Contacts to Increase Their Resistance to Dynamic Welding
Thomas J. SCHOEPF Abdellah BOUDINA Robert D. ROWLANDS Brent T. REPP
Publication
IEICE TRANSACTIONS on Electronics
Vol.E90-C
No.7
pp.1441-1447 Publication Date: 2007/07/01 Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.7.1441 Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006)) Category: Relays & Switches Keyword: automotive relay, silver tin oxide, inrush current, dynamic welding, pre-conditioning, DC,
Full Text: PDF>>
Summary:
Electromechanical switching devices such as relays may be surprisingly forgiving to occasional, but temporary, electrical stress beyond specification. Consequently delayed openings due to welded contacts on the order of milliseconds usually have been unnoticed and hence have not been reason for concern. However, as electrical systems of vehicles are getting "smarter" and more and more diagnostic routines are being implemented, even such short delay times may be translated as errors. Pre-conditioning contact surfaces has been explored as a measure to increase the welding resistance and eliminate contact opening delays. The 20-A-class relay investigated has been optimized to break occasional current peaks up to 80 ADC.
|
|
|