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Paper Abstract and Keywords
Presentation 2023-06-09 11:15
A Method to Derive Coupling Factor with H-Field Gradient for Exposure Assessment from Wireless Power Transfer Systems in Vehicles
Masanori Okada, Keishi Miwa, Sachiko Kodera, Akimasa Hirata (NITech) EMCJ2023-17
Abstract (in Japanese) (See Japanese page) 
(in English) There exists public concern about potential adverse health effect caused by electromagnetic fields. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) published the guidelines for human protection from electromagnetic fields. The maximum permissible external field strengths named reference level in the guidelines were derived assuming a uniform field exposure. However, in realistic exposure scenarios the magnetic field distribution is non-uniform, and thus assessment in terms of peak spatial field strength may give an over-conservative evaluation. The International Electrotechnical Commission (IEC) defined the coupling factor for non-uniform exposure for appropriate assessment. It is useful to derive a coupling factor for proper assessment, which compensate the induced field strength for field non-uniformity and body parts. In this study, we derived a coupling factor for non-uniform magnetic field emitted from square loop coil sources, and evaluate the effectiveness of the proposed method by comparing to H-field gradient. We also confirmed its effectiveness for leaked magnetic field from wireless power transfer system in vehicles.
Keyword (in Japanese) (See Japanese page) 
(in English) Coupling factor / SPFD method / Wireless power transfer / / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 72, EMCJ2023-17, pp. 24-29, June 2023.
Paper # EMCJ2023-17 
Date of Issue 2023-06-02 (EMCJ) 
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)
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Conference Information
Committee EMCJ  
Conference Date 2023-06-09 - 2023-06-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Otaru Chamber of Commerce & Industry 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC 
Paper Information
Registration To EMCJ 
Conference Code 2023-06-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Method to Derive Coupling Factor with H-Field Gradient for Exposure Assessment from Wireless Power Transfer Systems in Vehicles 
Sub Title (in English)  
Keyword(1) Coupling factor  
Keyword(2) SPFD method  
Keyword(3) Wireless power transfer  
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1st Author's Name Masanori Okada  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Keishi Miwa  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Sachiko Kodera  
3rd Author's Affiliation Nagoya Institute of Technology (NITech)
4th Author's Name Akimasa Hirata  
4th Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2023-06-09 11:15:00 
Presentation Time 20 minutes 
Registration for EMCJ 
Paper # EMCJ2023-17 
Volume (vol) vol.123 
Number (no) no.72 
Page pp.24-29 
#Pages 6 
Date of Issue 2023-06-02 (EMCJ) 

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