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Paper Abstract and Keywords
Presentation 2011-10-14 09:45
A Study of the Effect of Magnetic Sheet on Wireless Power Transfer using Magnetic Resonant Coupling
Hiroyasu Kawano, Satoshi Shimokawa, Akiyoshi Uchida, Kiyoto Matsui, Kazuyuki Ozaki, Masakazu Taguchi (Fujitsu Labs)
Abstract (in Japanese) (See Japanese page) 
(in English) To achieve higher efficiency in mobile consumer electronic devices with a wireless power transfer system using magnetic resonant coupling, it is essential to place insulating magnetic sheets between coils and metals such as batteries located near coils. In this report, we simulated the model composed of a pair of transmitter and receiver with magnetic sheets by means of an equivalent circuit model and electromagnetic analysis. Besides, we examined characteristics for the models with a rigid magnetic sheet composed of a single piece of magnetic plate and with a flexible magnetic sheet consisted of hundreds of small magnetic chips. Through this work, we confirmed the increase of efficiency with the increase of relative permeability of the magnetic sheet. Also, we clarified that efficiency decreases using the flexible magnetic sheet, compared to the rigid type, when the same magnetic material with hundreds of relative permeability is used for both types of magnetic sheets.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless Power Transfer / Magnetic Resonant Coupling / Magnetic Sheet / Relative Permeability / Efficiency / / /  
Reference Info. IEICE Tech. Rep.
Paper #  
Date of Issue  
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee AP WPT  
Conference Date 2011-10-12 - 2011-10-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Kanagawa Womens Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To WPT 
Conference Code 2011-10-AP-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of the Effect of Magnetic Sheet on Wireless Power Transfer using Magnetic Resonant Coupling 
Sub Title (in English)  
Keyword(1) Wireless Power Transfer  
Keyword(2) Magnetic Resonant Coupling  
Keyword(3) Magnetic Sheet  
Keyword(4) Relative Permeability  
Keyword(5) Efficiency  
1st Author's Name Hiroyasu Kawano  
1st Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs)
2nd Author's Name Satoshi Shimokawa  
2nd Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs)
3rd Author's Name Akiyoshi Uchida  
3rd Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs)
4th Author's Name Kiyoto Matsui  
4th Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs)
5th Author's Name Kazuyuki Ozaki  
5th Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs)
6th Author's Name Masakazu Taguchi  
6th Author's Affiliation Fujitsu Laboratories Ltd. (Fujitsu Labs)
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Date Time 2011-10-14 09:45:00 
Presentation Time 25 
Registration for WPT 
Paper #  
Volume (vol) IEICE-111 
Number (no)  
#Pages IEICE- 
Date of Issue  

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