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IEICE TRANSACTIONS on Electronics

Arc Length Just Before Extinction of Break Arcs Magnetically Blown-Out by an Appropriately Placed Permanent Magnet in a 200V-500VDC/10A Resistive Circuit

Yuta KANEKO, Junya SEKIKAWA

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Summary :

Silver electrical contacts were separated at constant opening speed in a 200V-500VDC/10A resistive circuit. Break arcs were extinguished by magnetic blowing-out with transverse magnetic field of a permanent magnet. The permanent magnet was appropriately located to simplify the lengthened shape of the break arcs. Magnetic flux density of the transverse magnetic field was varied from 20 to 140mT. Images of the break arcs were observed from the horizontal and vertical directions using two high speed cameras simultaneously. Arc length just before extinction was analyzed from the observed images. It was shown that shapes of the break arcs were simple enough to trace the most part of paths of the break arcs for all experimental conditions owing to simplification of the shapes of the break arcs by appropriate arrangement of the magnet. The arc length increased with increasing supply voltage and decreased with increasing magnetic flux density. These results will be discussed in the view points of arc lengthening time and arc lengthening velocity.

Publication
IEICE TRANSACTIONS on Electronics Vol.E103-C No.12 pp.698-704
Publication Date
2020/12/01
Publicized
2020/07/03
Online ISSN
1745-1353
DOI
10.1587/transele.2020EMP0001
Type of Manuscript
Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices)
Category

Authors

Yuta KANEKO
  Shizuoka University
Junya SEKIKAWA
  Shizuoka University

Keyword