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Paper Abstract and Keywords
Presentation 2019-01-18 15:30
Influences of contact opening speeds and external magnetic field on shortening of break arc durations of AgSnO2 contacts in a DC inductive load circuit up to 20V-17A
Seika Tokumitsu, Makoto Hasegawa (Chitose Inst. of Science & Technology) EMD2018-52
Abstract (in Japanese) (See Japanese page) 
(in English) In a DC inductive (L=5.7mH) load circuit, a AgSnO2 contact pair with applied external magnetic field of about 120mT was operated to break a load current of 14V-12A, 20V-7A or 20V-17A at different contact opening speeds from 1 to 200 mm/s. Voltage and current waveforms of break arcs were measured, and arc movement was observed with a high-speed camera at each condition. With slower contact opening speeds or smaller load current levels, magnetic blowing was not observed even with applied magnetic field. Lorentz force in non-blowing cases were calculated from the observed arc current waveforms, resulting in estimation in which the minimum Lorentz force required to realize magnetic blowing will be around 0.08mN. However, in cases with slower contact opening speeds or smaller load current levels, magnetic field application still resulted in shortenings of break arcs, implying that any factors other than magnetic blowing seem to be involved in break arc shortening due to application of external magnetic field.
Keyword (in Japanese) (See Japanese page) 
(in English) Electrical contacts / Break arc / Contact opening speed / Magnetic blowing / AgSnO2 contacts / Metallic phase arc / Gaseous phase arc /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 407, EMD2018-52, pp. 23-28, Jan. 2019.
Paper # EMD2018-52 
Date of Issue 2019-01-11 (EMD) 
ISSN Print edition: ISSN 0913-5685    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)
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Conference Information
Committee EMD  
Conference Date 2019-01-18 - 2019-01-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2019-01-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Influences of contact opening speeds and external magnetic field on shortening of break arc durations of AgSnO2 contacts in a DC inductive load circuit up to 20V-17A 
Sub Title (in English)  
Keyword(1) Electrical contacts  
Keyword(2) Break arc  
Keyword(3) Contact opening speed  
Keyword(4) Magnetic blowing  
Keyword(5) AgSnO2 contacts  
Keyword(6) Metallic phase arc  
Keyword(7) Gaseous phase arc  
Keyword(8)  
1st Author's Name Seika Tokumitsu  
1st Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Science & Technology)
2nd Author's Name Makoto Hasegawa  
2nd Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Science & Technology)
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Speaker Author-1 
Date Time 2019-01-18 15:30:00 
Presentation Time 25 minutes 
Registration for EMD 
Paper # EMD2018-52 
Volume (vol) vol.118 
Number (no) no.407 
Page pp.23-28 
#Pages 6 
Date of Issue 2019-01-11 (EMD) 

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