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| Presentation | 2014-04-17 14:25 Unified Formula on Maximum Available Efficiency for RF Power Transfer Systems -- Lucid Elaboration Even Before Learning a Word of Coupled Resonance -- Takashi Ohira (Toyohashi Univ. Tech.)  WPT2014-5 SCE2014-5 MW2014-5 Link to ES Tech. Rep. Archives: SCE2014-5 MW2014-5 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Many papers and books were published on the topic of wireless power transfer. They conclude that power transfer efficiency is primarily dominated by coupling coefficient k multiplied by Q factor or so-called resonant kQ product. Indeed kQ product is useful when its equivalent circuit is represented by single-mode resonators, it is not always. This lecture presents a system of versatile formulas that characterizes wireless power transfer schemes in arbitrary coupling topologies. Maximum available efficiency is formulated in two-port immittance matrix domain. Index kQ is extended to general cases even where resonance or filtering model is inapplicable. The novel index, named efficiency angle θ, rigorously predicts the performance of any power transfer regime without resort to its equivalent circuit model such as coupled LCR networks. Angle θ works as a unified pilotage for lucid design of various types of wireless power transfer. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | RF power transfer / conjugate matching / efficiency angle tangent / performance index / kQ product / Q factor / theory / formula | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 9, WPT2014-5, pp. 23-26, April 2014. | |
| Paper # | WPT2014-5 | |
| Date of Issue | 2014-04-10 (WPT, SCE, MW) | |
| 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 | WPT2014-5 SCE2014-5 MW2014-5 Link to ES Tech. Rep. Archives: SCE2014-5 MW2014-5 |
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| Conference Information | |
| Committee | MW SCE WPT |
| Conference Date | 2014-04-17 - 2014-04-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave technologies for Wireless Power Transfer, Superconducting Microwave technologies, Microwave technologies, etc. |
| Paper Information | |
| Registration To | WPT |
| Conference Code | 2014-04-MW-SCE-WPT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Unified Formula on Maximum Available Efficiency for RF Power Transfer Systems |
| Sub Title (in English) | Lucid Elaboration Even Before Learning a Word of Coupled Resonance |
| Keyword(1) | RF power transfer |
| Keyword(2) | conjugate matching |
| Keyword(3) | efficiency angle tangent |
| Keyword(4) | performance index |
| Keyword(5) | kQ product |
| Keyword(6) | Q factor |
| Keyword(7) | theory |
| Keyword(8) | formula |
| 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 | 2014-04-17 14:25:00 |
| Presentation Time | 25 minutes |
| Registration for | WPT |
| Paper # | WPT2014-5, SCE2014-5, MW2014-5 |
| Volume (vol) | vol.114 |
| Number (no) | no.9(WPT), no.10(SCE), no.11(MW) |
| Page | pp.23-26 |
| #Pages | 4 |
| Date of Issue | 2014-04-10 (WPT, SCE, MW) |
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