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Paper Abstract and Keywords
Presentation 2026-06-03 14:25
A Discussion on Differential Feeding in Misaligned Electrically Coupled Wireless Power Transfer Systems -- A Comparison of Mixed-Mode S-Parameters and Virtual Floating Mode --
Shunsuke Nishioka, Nozomi Haga (Toyohashi Tech) WPT2026-10
Abstract (in Japanese) (See Japanese page) 
(in English) Electrically coupled wireless power transfer (E-WPT) systems often utilize balanced circuits to prevent electromagnetic interference from common-mode currents, with mixed-mode S-parameters serving as the standard evaluation metric. However, coupler misalignment introduces an unbalanced state, potentially leading to common-mode currents and the underestimation of maximum power transfer efficiency when using standard differential-mode S-parameters. To address this, this paper proposes a transformation method from 4-port S-parameters to a virtual floating mode that ensures zero common-mode current. The effectiveness of this approach is demonstrated by discussing the differences in transmission characteristics compared to conventional differential-mode analysis.
Keyword (in Japanese) (See Japanese page) 
(in English) Electrically coupled wireless power transfer / 4-port S-parameters / Misalignment / Common-mode current / Virtual floating mode / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 53, WPT2026-10, pp. 4-7, June 2026.
Paper # WPT2026-10 
Date of Issue 2026-05-27 (WPT) 
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 WPT2026-10

Conference Information
Committee WPT  
Conference Date 2026-06-03 - 2026-06-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Online (changed from Ishigaki Civic Hall) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Power Transfer, etc 
Paper Information
Registration To WPT 
Conference Code 2026-06-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Discussion on Differential Feeding in Misaligned Electrically Coupled Wireless Power Transfer Systems 
Sub Title (in English) A Comparison of Mixed-Mode S-Parameters and Virtual Floating Mode 
Keyword(1) Electrically coupled wireless power transfer  
Keyword(2) 4-port S-parameters  
Keyword(3) Misalignment  
Keyword(4) Common-mode current  
Keyword(5) Virtual floating mode  
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1st Author's Name Shunsuke Nishioka  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Tech)
2nd Author's Name Nozomi Haga  
2nd Author's Affiliation Toyohashi University of Technology (Toyohashi Tech)
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Speaker Author-1 
Date Time 2026-06-03 14:25:00 
Presentation Time 20 minutes 
Registration for WPT 
Paper # WPT2026-10 
Volume (vol) vol.126 
Number (no) no.53 
Page pp.4-7 
#Pages 4 
Date of Issue 2026-05-27 (WPT) 

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