Paper Abstract and Keywords |
Presentation |
2014-06-06 18:00
Proposal of Theoretical Model for Foreign Object Detection in Wireless Power Transfer Systems Atsuo Hatono (MJHEP Program) WPT2014-34 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
This paper proposes a integrated theoretical model for foreign object detection (FOD) combined with both circuit and field level phenomena. If there be foreign object in the gap of wireless power transfer systems, the object will be heated with eddy currents caused through the interaction with electromagnetic fields. The phenomenon cannot be formulated with the equivalent circuit theory for circuit levels. For the integration of field and circuit level phenomena, this paper formulates FOD with Maxwell Equations which are the fundamental principle of electromagnetic phenomena. This model showed that thermal effect is theoretically proportional to permeability of the foreign object which dominates eddy currents. Strong thermal effects of aluminum foils and stainless scrubbing brush can be explained with their huge mutual inductance comparatively large surface area to their volumes. Further, it also showed that it is difficult to detect the foreign objects through the shift of the mutual impedance of WPT since the effects of FOD to the circuit level appears in the real part of the mutual impedance of WPT. It is desired to develop the FOD sensing circuits sensitive to inductive components of mutual impedance. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Wireless Power Transfer Systems / FOD / Maxwell’s Equations / Eddy Current, / Mutual Impedance / / / |
Reference Info. |
IEICE Tech. Rep., vol. 114, no. 72, WPT2014-34, pp. 57-62, June 2014. |
Paper # |
WPT2014-34 |
Date of Issue |
2014-05-30 (WPT) |
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) |
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WPT2014-34 |
Conference Information |
Committee |
WPT |
Conference Date |
2014-06-06 - 2014-06-06 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Univ. of Tokyo |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Wireless Power Transfer, etc |
Paper Information |
Registration To |
WPT |
Conference Code |
2014-06-WPT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Proposal of Theoretical Model for Foreign Object Detection in Wireless Power Transfer Systems |
Sub Title (in English) |
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Keyword(1) |
Wireless Power Transfer Systems |
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FOD |
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Maxwell’s Equations |
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Eddy Current, |
Keyword(5) |
Mutual Impedance |
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1st Author's Name |
Atsuo Hatono |
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MJHEP Program, MARA Japan Industrial Institute (MJHEP Program) |
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Speaker |
Author-1 |
Date Time |
2014-06-06 18:00:00 |
Presentation Time |
25 minutes |
Registration for |
WPT |
Paper # |
WPT2014-34 |
Volume (vol) |
vol.114 |
Number (no) |
no.72 |
Page |
pp.57-62 |
#Pages |
6 |
Date of Issue |
2014-05-30 (WPT) |
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