Positions of Arc Spots of Break Arcs Occurring between Carbon Contacts When Transverse Magnetic Field Is Applied

Tomoaki SASAKI  Junya SEKIKAWA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E96-C   No.9   pp.1138-1141
Publication Date: 2013/09/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E96.C.1138
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: 
Keyword: 
break arc,  magnet,  external magnetic field,  electrical contacts,  carbon,  

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Summary: 
Break arcs are generated between carbon contacts in a DC48V and 10A resistive circuit. The external transverse magnetic field formed by a permanent magnet is applied to break arcs. The position of the cathode spot region of the break arcs occurring between carbon contacts is investigated and the following results are shown. The cathode and anode spot regions moves together with and without the magnetic field. The position of the break arcs just before arc extinction tends to shift upward with increase of the magnetic flux density of the transverse magnetic field.