Capacitive power transfer through virtual selfcapacitance route

Gao, X, Zhou, H, Hu, W, Deng, Q, Liu, G and Lai, J 2018, 'Capacitive power transfer through virtual selfcapacitance route', IET Power Electronics, vol. 11, no. 6, pp. 1110-1118.


Document type: Journal Article
Collection: Journal Articles

Title Capacitive power transfer through virtual selfcapacitance route
Author(s) Gao, X
Zhou, H
Hu, W
Deng, Q
Liu, G
Lai, J
Year 2018
Journal name IET Power Electronics
Volume number 11
Issue number 6
Start page 1110
End page 1118
Total pages 9
Publisher Institution of Engineering and Technology
Abstract This study presents the modelling, analysis, and experimental results of a novel capacitive power transfer (CPT) structure with a single coupling capacitor. It is noticed that each charged object has a nature property called self-capacitance, which is a kind of capacitance with respect to infinity. Taking advantage of this property, the conventional CPT structure can be simplified. Instead of using two capacitors to form the closed coupling loop, one of them is replaced by two metallic blocks with relatively big self-capacitances. Even though there is no physical coupling between the two blocks, they can be considered as virtually connected through their self-capacitances to infinity, which forms the return route for the proposed CPT structure. To achieve precise analysis, the detailed circuit model is established with the consideration of self-capacitances for both the blocks and coupling plates. Moreover, the results of the applications with attached blocks replaced by robust reference grounds (RRG) are also analysed in order to extend the proposed structure to more scenarios. System performances with and without RRG are compared. Experiments with different capacitor plate sizes at various transfer distances are also conducted. Both the theoretical analysis and experimental results indicate the effectiveness of the proposed structure.
Subject Electrical and Electronic Engineering not elsewhere classified
Keyword(s) System
DOI - identifier 10.1049/iet-pel.2017.0629
Copyright notice © The Institution of Engineering and Technology 2018
ISSN 1755-4535
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