A Proposal of a New Evaluation Scheme of Pips and Craters Formed by Arc Discharges on Electrical Contact Surfaces

Makoto HASEGAWA  Koichiro SAWA  

IEICE TRANSACTIONS on Electronics   Vol.E87-C   No.8   pp.1277-1280
Publication Date: 2004/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on IS-EMD2003--Recent Technical Trend of Electro-Mechanical Devices)
electrical contact,  arc discharge,  erosion,  material transfer,  laser microscope,  

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A new scheme for evaluation of shapes of pips and craters formed by arc discharges on electrical contact surfaces is proposed. Measuring a height of a pip or a depth of a crater as well as an average diameter thereof with a scanning laser microscope and then putting a plot having the measured values as its vertical and horizontal coordinates enable us to numerically and briefly evaluate shapes of those pips and craters on arc-damaged contact surfaces. Some exemplary results obtained by this evaluation scheme are presented here.