NDLI: Receiving-coil structure reducing stray AC resistance for resonant coupling wireless power transfer

Content Provider	IET Digital Library
Author	Umetani, Kazuhiro Honjo, Toru Koyama, Takahiro Ishihara, Masataka Hiraki, Eiji
Abstract	Resonant inductive coupling wireless power transfer is widely known to be a possible convenient power supply method for the small mobile apparatus. However, the limited receiving-coil size tends to lower the efficiency and limit the output power owing to the small mutual inductance and comparatively large stray alternating current (AC) resistance of the receiving-coil. This study mitigates this issue by proposing a novel receiving-coil structure. This proposed structure comprises a coil and a drum core with a thin axis. The coil is wound on the axis to form a single winding layer. The proposed structure can reduce stray AC resistance by suppressing the proximity effect and reducing the wire length without deteriorating the mutual inductance significantly. Therefore, better efficiency and larger output power can be achieved. Simulations and experiments were performed to verify the proposed structure. Consequently, both simulations and experiments supported the reduction in AC resistance compared to the conventional structure. Furthermore, the experiment revealed improvements by the proposed structure in both efficiency and output power. These results support the effectiveness of the proposed structure for wireless power transfer to small mobile apparatus.
Starting Page	2338
Ending Page	2344
Page Count	7
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 9, Aug (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5358
Journal	IET Power Electronics
Publisher Date	2019-06-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Coils Inductive Power Transmission Inductors And Transformer Mobile Apparatus Mutual Inductance Power Supply Method Receiving-coil Structure Resonant Inductive Coupling Wireless Power Transfer Single Winding Layer Stray AC Resistance Stray Alternating Current Resistance
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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