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Paper Abstract and Keywords
Presentation 2019-03-01 14:45
Influence of current and magnetic flux density on magnetic blow-out on arc discharge at breaking of electrical contacts
Mano Kenta, Koichiro Sawa, KIyoshi Yoshida (NIT) EMD2018-69 Link to ES Tech. Rep. Archives: EMD2018-69
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, applications using DC high voltage are increasing. In the DC circuit, there is a method called "magnetic blow-out" which extinguishes arc discharge occurring in the electrical contacts by applying a magnetic flux. In the experiment, the current changes in the range of 1 to 30 A. The voltage E is DC 100 V, the magnetic flux density is set to 0 mT, 5 mT, and 10 mT. In addition, the breaking speed of the electrical contact is constant at 100 mm / s. The contact materials are W (tungsten) and Ag (silver). The arc duration time ta and the arc energy Ea were obtained from the arc waveform. Furthermore, the change in the Lorentz force at the magnetic flux density set from the arc current waveform and the gap length at that time was calculated. As a result, ta decreased irrespective of the current when a magnetic field was applied. In the case of 10 mT, it was found that ta increases when the current is below a certain constant current. From this, the relationship between ta and the Lorentz force was estimated.
Keyword (in Japanese) (See Japanese page) 
(in English) Arc discharge / Arc duration / Electrical contact / Lorentz force / Magnetic blow-out / Arc current / Magnetic flux /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 462, EMD2018-69, pp. 53-57, March 2019.
Paper # EMD2018-69 
Date of Issue 2019-02-22 (EMD) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EMD2018-69 Link to ES Tech. Rep. Archives: EMD2018-69

Conference Information
Committee EMD  
Conference Date 2019-03-01 - 2019-03-01 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To EMD 
Conference Code 2019-03-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Influence of current and magnetic flux density on magnetic blow-out on arc discharge at breaking of electrical contacts 
Sub Title (in English)  
Keyword(1) Arc discharge  
Keyword(2) Arc duration  
Keyword(3) Electrical contact  
Keyword(4) Lorentz force  
Keyword(5) Magnetic blow-out  
Keyword(6) Arc current  
Keyword(7) Magnetic flux  
1st Author's Name Mano Kenta  
1st Author's Affiliation Nippon Institute of Technology (NIT)
2nd Author's Name Koichiro Sawa  
2nd Author's Affiliation Nippon Institute of Technology (NIT)
3rd Author's Name KIyoshi Yoshida  
3rd Author's Affiliation Nippon Institute of Technology (NIT)
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Speaker Author-1 
Date Time 2019-03-01 14:45:00 
Presentation Time 15 minutes 
Registration for EMD 
Paper # EMD2018-69 
Volume (vol) vol.118 
Number (no) no.462 
Page pp.53-57 
Date of Issue 2019-02-22 (EMD) 

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