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Volumetric erosion measurements of contacts tested in DC automotive relays

Volumetric erosion measurements of contacts tested in DC automotive relays
Volumetric erosion measurements of contacts tested in DC automotive relays
A new tool for measurement of contact arc erosion offers better means for improvement in relay and switch design. This paper presents an experimental study on the erosion of relay contacts tested in commercial devices under representative load conditions. The erosion measurement of relay contacts has been shown to be difficult since the standard method based on a mass change cannot be easily used in this type of device. The reason for this is that the contacts cannot be separated from the contact support. In the past, SEM studies have been used for rough estimates of erosion. More recently, noncontact laser measurement systems have been developed and used in this application for measurement of the volumetric erosion. In this study, using the method of “design of experiments,” a number of variables have been investigated, which include electrical current levels, material composition, and contact switching life. The objective of the study is to determine the volumetric erosion of contacts in actual automotive relays tested under a range of conditions. The study shows this technique offers a useful method for studying and improving both material and device design.
0780366670
73-81
Institute of Electrical and Electronics Engineers
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Witter, G.J.
b2923fe4-880a-4cfd-b970-ec9197209218
Chen, Z.K.
e4f81e6e-5304-4fd6-afb2-350ec8d1e90f
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Witter, G.J.
b2923fe4-880a-4cfd-b970-ec9197209218
Chen, Z.K.
e4f81e6e-5304-4fd6-afb2-350ec8d1e90f

McBride, J.W., Witter, G.J. and Chen, Z.K. (2002) Volumetric erosion measurements of contacts tested in DC automotive relays. In Proceedings of the Forty-Seventh IEEE Holm Conference on Electrical Contacts, 2001. Institute of Electrical and Electronics Engineers. pp. 73-81 . (doi:10.1109/HOLM.2001.953191).

Record type: Conference or Workshop Item (Paper)

Abstract

A new tool for measurement of contact arc erosion offers better means for improvement in relay and switch design. This paper presents an experimental study on the erosion of relay contacts tested in commercial devices under representative load conditions. The erosion measurement of relay contacts has been shown to be difficult since the standard method based on a mass change cannot be easily used in this type of device. The reason for this is that the contacts cannot be separated from the contact support. In the past, SEM studies have been used for rough estimates of erosion. More recently, noncontact laser measurement systems have been developed and used in this application for measurement of the volumetric erosion. In this study, using the method of “design of experiments,” a number of variables have been investigated, which include electrical current levels, material composition, and contact switching life. The objective of the study is to determine the volumetric erosion of contacts in actual automotive relays tested under a range of conditions. The study shows this technique offers a useful method for studying and improving both material and device design.

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More information

Published date: 7 August 2002
Venue - Dates: Forty-Seventh IEEE Holm Conference on Electrical Contacts, 2001-09-10 - 2001-09-12
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 21712
URI: http://eprints.soton.ac.uk/id/eprint/21712
ISBN: 0780366670
PURE UUID: 6cae0ee1-6d3d-42d4-aadc-ec1efd51f455

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Date deposited: 27 Feb 2007
Last modified: 15 Jul 2019 19:23

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Contributors

Author: J.W. McBride
Author: G.J. Witter
Author: Z.K. Chen

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