Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2026-07-09 09:35
Evaluation of in-body induced electric field in multi-coil wireless power transmission with phase difference
Masane Wakahara, Akimasa Hirata (NITech) EMT2026-4 MW2026-27 OPE2026-10 EST2026-8 MWPTHz2026-19
Abstract (in Japanese) (See Japanese page) 
(in English) As the practical application of wireless power transfer (WPT) for electric vehicles (EVs) progresses, assessing human safety in high-power systems—such as WPT 3 (11 kW) as defined by SAE J2954—has become a major challenge. In the evaluation of electromagnetic field exposure in the low-frequency band, methods based on the quasi-static approximation that consider only the real-part magnetic field are widely used; however, in actual magnetic coupling-type WPT systems, a magnetic field distribution with complex amplitude is formed due to the phase difference in current between the transmitter and receiver coils. In this paper, we performed an analysis of induced electric fields in the human body taking into account complex-amplitude magnetic fields as input via the SPFD method, and assessed compliance around the power transmission and reception coils at the WPT 3 level. The analysis suggested that, under conditions where the current in the receiving coil has a 90-degree phase difference relative to the current in the transmitting coil, the induced electric fields in the body may satisfy the basic restrictions even in regions where the magnetic field strength exceeds the reference level. This highlighted the conservativeness of evaluations based on reference levels and the importance of estimating effective safety areas through detailed analysis based on fundamental limits.
Keyword (in Japanese) (See Japanese page) 
(in English) SPFD method / Electromagnetic field computation / Wireless Power Transfer / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 99, EST2026-8, pp. 1-6, July 2026.
Paper # EST2026-8 
Date of Issue 2026-07-02 (EMT, MW, OPE, EST, MWPTHz) 
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 EMT2026-4 MW2026-27 OPE2026-10 EST2026-8 MWPTHz2026-19

Conference Information
Committee OPE EST MWPTHz MW EMT IEE-EMT  
Conference Date 2026-07-09 - 2026-07-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Kushiro Chamber of Commerce and Industry 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Workshop on Optical and Microwave technologies 
Paper Information
Registration To EST 
Conference Code 2026-07-OPE-EST-MWPTHz-MW-EMT-EMT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of in-body induced electric field in multi-coil wireless power transmission with phase difference 
Sub Title (in English)  
Keyword(1) SPFD method  
Keyword(2) Electromagnetic field computation  
Keyword(3) Wireless Power Transfer  
Keyword(4)  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Masane Wakahara  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Akimasa Hirata  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name  
3rd Author's Affiliation ()
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2026-07-09 09:35:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EMT2026-4, MW2026-27, OPE2026-10, EST2026-8, MWPTHz2026-19 
Volume (vol) vol.126 
Number (no) no.96(EMT), no.97(MW), no.98(OPE), no.99(EST), no.100(MWPTHz) 
Page pp.1-6 
#Pages 6 
Date of Issue 2026-07-02 (EMT, MW, OPE, EST, MWPTHz) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan