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Paper Abstract and Keywords
Presentation 2026-07-17 13:55
Analysis of the Spatial Distribution and Temporal Variation of the Lorentz Force Acting on Magnetically Blown Break Arcs in a 600 VDC/10 A Circuit
Shuma Nakayama, Junya Sekikawa (Shizuoka Univ.) EMCJ2026-27 WPT2026-16 EMD2026-3
Abstract (in Japanese) (See Japanese page) 
(in English) Break arcs were generated by separating pure silver electrical contacts at a constant contact separating speed in a resistive load circuit with supply voltages of 300 V and 600 V and a circuit current when the contacts are contacted of 10 A. The break arcs were driven upward by magnetic blowing-out using a permanent magnet, and the magnetic flux density B_z of the transverse magnetic field used for magnetic blowing-out was set to 20 mT and 60 mT. Arc voltage and current waveforms were measured, and the three-dimensional paths of the break arcs were analyzed from high-speed camera images. By correlating the analyzed arc paths with the magnetic flux density distribution, the spatial distribution and temporal variation of the Lorentz force acting on the break arcs were investigated. As a result, the Lorentz force acting on the break arcs increased in the initial stage of the discharge as the arc length increased and subsequently decreased as the circuit current decreased. The Lorentz force per unit arc length was larger in the early stage of the discharge, and changes in arc shape and movement of the cathode and anode spots were also more pronounced during this period. The cathode spot was less likely to move than the anode spot, and this tendency became more pronounced under conditions of higher magnetic flux density.
Keyword (in Japanese) (See Japanese page) 
(in English) Break arc / Electrical contacts / High-speed camera / Arc spots / Lorentz force / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 117, EMD2026-3, pp. 13-18, July 2026.
Paper # EMD2026-3 
Date of Issue 2026-07-10 (EMCJ, WPT, EMD) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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 EMCJ2026-27 WPT2026-16 EMD2026-3

Conference Information
Committee WPT EMCJ EMD  
Conference Date 2026-07-17 - 2026-07-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Power Transfer, EMC, Electronic Device Implementation 
Paper Information
Registration To EMD 
Conference Code 2026-07-WPT-EMCJ-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of the Spatial Distribution and Temporal Variation of the Lorentz Force Acting on Magnetically Blown Break Arcs in a 600 VDC/10 A Circuit 
Sub Title (in English)  
Keyword(1) Break arc  
Keyword(2) Electrical contacts  
Keyword(3) High-speed camera  
Keyword(4) Arc spots  
Keyword(5) Lorentz force  
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Keyword(7)  
Keyword(8)  
1st Author's Name Shuma Nakayama  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
2nd Author's Name Junya Sekikawa  
2nd Author's Affiliation Shizuoka University (Shizuoka Univ.)
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Speaker Author-1 
Date Time 2026-07-17 13:55:00 
Presentation Time 25 minutes 
Registration for EMD 
Paper # EMCJ2026-27, WPT2026-16, EMD2026-3 
Volume (vol) vol.126 
Number (no) no.115(EMCJ), no.116(WPT), no.117(EMD) 
Page pp.13-18 
#Pages 6 
Date of Issue 2026-07-10 (EMCJ, WPT, EMD) 

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