Design, Analysis, and Experimental Verification of a Ball-Joint Structure With Constant Coupling for Capacitive Wireless Power Transfer

This article presents the design, analysis, and verification of a ball-joint structure suitable for capacitive wireless power transfer (WPT) for a consumer electronic lighting system. The WPT structure consists of a ball-joint component rotatable inside a spherical socket. Conductive surfaces are us...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2020-12, Vol.8 (4), p.3582-3591
Main Authors: Liang, H. W. Rebecca, Lee, Chi-Kwan, Hui, S. Y. Ron
Format: Article
Language:English
Subjects:
Ball-joint
Capacitors
constant coupling
Consumer electronics
Coupling
Couplings
Design analysis
electric field coupling
Electric fields
Integrated circuit modeling
Receivers
Sockets
Verification
Wireless power transfer
wireless power transfer (WPT)
Wireless power transmission
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Summary:This article presents the design, analysis, and verification of a ball-joint structure suitable for capacitive wireless power transfer (WPT) for a consumer electronic lighting system. The WPT structure consists of a ball-joint component rotatable inside a spherical socket. Conductive surfaces are used to form equivalent plates so that the capacitive WPT can be achieved through electric field coupling. One unique feature of this novel structure is that the mutual capacitance remains almost constant in the rotatable angular range. The design and theoretical analysis are included and practical results obtained from a 7-W prototype are included to confirm the theory.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2019.2938226