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Paper Abstract and Keywords
Presentation 2014-11-18 13:00
A study of low loss design technique for planar transformer in high frequency isolated DC-DC converter
Yudai Mizoguchi, Akinori Hariya, Yoichi Ishizuka (Nagasaki Univ.), Ken Matsuura (TDK), Satoshi Tomioka (TDK-Lambda), Tamotsu Ninomiya (AGI) EE2014-21
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, in order to optimize winding structure of planar transformer in 5MHz LLC resonant converter, the planar transformer of the three type winding structure having a leakage inductance is considered, and these planar transformers are simulated by using the electromagnetic field simulation Maxwell 3D. Power efficiency and transformer power loss are compared in the load range of 1-10A by circuit analysis simulator using the parameters obtained in the electromagnetic field analysis simulator. LLC resonant converter mounted on planar transformer of winding structure which circuit power efficiency is maximized over a wide load range is experimented. The specifications of the converter are 48V of input voltage, 12V of output voltage, 120W of output power, 5MHz of switching frequency. As a result, 90.8% maximum efficiency and 15.05cm3 volumes LLC resonant converter can be realized.
Keyword (in Japanese) (See Japanese page) 
(in English) Planar Transformer / winding structure / LLC resonant converter / 5MHz / leakage inductance / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 309, EE2014-21, pp. 13-18, Nov. 2014.
Paper # EE2014-21 
Date of Issue 2014-11-11 (EE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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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 EE WPT  
Conference Date 2014-11-18 - 2014-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Doshisha University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EE 
Conference Code 2014-11-EE-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study of low loss design technique for planar transformer in high frequency isolated DC-DC converter 
Sub Title (in English)  
Keyword(1) Planar Transformer  
Keyword(2) winding structure  
Keyword(3) LLC resonant converter  
Keyword(4) 5MHz  
Keyword(5) leakage inductance  
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1st Author's Name Yudai Mizoguchi  
1st Author's Affiliation Nagasaki University (Nagasaki Univ.)
2nd Author's Name Akinori Hariya  
2nd Author's Affiliation Nagasaki University (Nagasaki Univ.)
3rd Author's Name Yoichi Ishizuka  
3rd Author's Affiliation Nagasaki University (Nagasaki Univ.)
4th Author's Name Ken Matsuura  
4th Author's Affiliation TDK Corporation (TDK)
5th Author's Name Satoshi Tomioka  
5th Author's Affiliation TDK-Lambda Corporation (TDK-Lambda)
6th Author's Name Tamotsu Ninomiya  
6th Author's Affiliation Asian Growth Research Institute (AGI)
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Speaker
Date Time 2014-11-18 13:00:00 
Presentation Time 25 
Registration for EE 
Paper # IEICE-EE2014-21 
Volume (vol) IEICE-114 
Number (no) no.309 
Page pp.13-18 
#Pages IEICE-6 
Date of Issue IEICE-EE-2014-11-11 


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