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Paper Abstract and Keywords
Presentation 2014-07-10 14:30
Maximum Available Efficiency Formula for Linear Two-Port Sinusoidal Wave Power Transfer Systems -- Lucid Derivation before Learning a Word of Source Impedance Matching --
Takashi Ohira (Toyohashi Univ. Tech.) EE2014-5
Abstract (in Japanese) (See Japanese page) 
(in English) The maximum available efficiency is a key factor in designing wireless power transfer systems. Professors and engineers nevertheless often refer to the term with opaque knowledge on its essential meaning. This stems from its quite complicated formulation. This lecture starts from a two-port black box model representing an arbitrary scheme of wireless power transfer system. Assuming its immittance matrix known, we express the input and output power as quadratic polynomials of RF voltages and currents at the ports. One of Jacobean matrix determinant zeros leads to the optimum set of voltages and currents that lets the power transfer efficiency reach its peak. The formulation never assumes any resonance, mode coupling, source property, or even impedance matching at all. Free from taking those conditions into account, the introduced efficiency angle θ works as an elegant design criterion for sundry genera of future wireless power transfer systems.
Keyword (in Japanese) (See Japanese page) 
(in English) RF power transfer / efficiency angle tangent / performance criterion / Jacobean / immittance matrix / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 130, EE2014-5, pp. 1-4, July 2014.
Paper # EE2014-5 
Date of Issue 2014-07-03 (EE) 
ISSN Print edition: ISSN 0913-5685    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 EE2014-5

Conference Information
Committee EE IEE-SPC  
Conference Date 2014-07-10 - 2014-07-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Hiroshima Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EE 
Conference Code 2014-07-EE-SPC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Maximum Available Efficiency Formula for Linear Two-Port Sinusoidal Wave Power Transfer Systems 
Sub Title (in English) Lucid Derivation before Learning a Word of Source Impedance Matching 
Keyword(1) RF power transfer  
Keyword(2) efficiency angle tangent  
Keyword(3) performance criterion  
Keyword(4) Jacobean  
Keyword(5) immittance matrix  
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1st Author's Name Takashi Ohira  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Univ. Tech.)
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Speaker Author-1 
Date Time 2014-07-10 14:30:00 
Presentation Time 30 minutes 
Registration for EE 
Paper # EE2014-5 
Volume (vol) vol.114 
Number (no) no.130 
Page pp.1-4 
#Pages 4 
Date of Issue 2014-07-03 (EE) 

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