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Paper Abstract and Keywords
Presentation 2021-12-08 14:55
Noise mechanism during acceleration/deceleration in electric vehicles
Kensuke Kobayashi, Yoshihiro Kida, shinji ohoka (SOKEN), Katsumi Nakamura (DENSO) EMCJ2021-58
Abstract (in Japanese) (See Japanese page) 
(in English) By simultaneously measuring the vehicle condition and the antenna-induced voltage, it was found that an impulse-shaped antenna-induced voltage is generated during acceleration / deceleration, which exacerbates noise in the AM band. Furthermore, by simultaneously measuring the antenna-induced voltage and the shaft voltage of the drive shaft, it was confirmed that the impulse-shaped antenna-induced voltage was synchronized with the shaft voltage. In addition, by simultaneously measuring the shaft voltage of the MG shaft, transmission, and drive shaft, it was clarified that the impulse-shaped shaft voltage is mechanically generated by the contact and opening of the gears, which are the components of the transmission.
Keyword (in Japanese) (See Japanese page) 
(in English) Shaft voltage / Electric vehicle / Radiation noise / AM radio / Antenna / Acceleration/Deceleration / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 288, EMCJ2021-58, pp. 22-27, Dec. 2021.
Paper # EMCJ2021-58 
Date of Issue 2021-12-01 (EMCJ) 
ISSN 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)
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Conference Information
Conference Date 2021-12-08 - 2021-12-08 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To EMCJ 
Conference Code 2021-12-EMCJ-EMC-SPC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Noise mechanism during acceleration/deceleration in electric vehicles 
Sub Title (in English)  
Keyword(1) Shaft voltage  
Keyword(2) Electric vehicle  
Keyword(3) Radiation noise  
Keyword(4) AM radio  
Keyword(5) Antenna  
Keyword(6) Acceleration/Deceleration  
1st Author's Name Kensuke Kobayashi  
1st Author's Affiliation SOKEN,INC (SOKEN)
2nd Author's Name Yoshihiro Kida  
2nd Author's Affiliation SOKEN,INC (SOKEN)
3rd Author's Name shinji ohoka  
3rd Author's Affiliation SOKEN,INC (SOKEN)
4th Author's Name Katsumi Nakamura  
4th Author's Affiliation DENSO CORPORATION (DENSO)
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Speaker Author-1 
Date Time 2021-12-08 14:55:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2021-58 
Volume (vol) vol.121 
Number (no) no.288 
Page pp.22-27 
Date of Issue 2021-12-01 (EMCJ) 

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