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Study of coupling configurations of capacitive power transfer system with four metal plates

Published online by Cambridge University Press:  15 November 2019

Qi Zhu Open the ORCID record for Qi Zhu [Opens in a new window] ,
Shaoge Zang Open the ORCID record for Shaoge Zang [Opens in a new window] ,
Lixiang Jackie Zou ,
Guanguan Zhang ,
Mei Su  and
Aiguo Patrick Hu Open the ORCID record for Aiguo Patrick Hu [Opens in a new window]
Qi Zhu
Affiliation:
School of Automation, Central South University, Changsha, China Hunan Provincial Key Laboratory of Power Electronics Equipment and Grid, Changsha, China
Shaoge Zang
Affiliation:
Department of Electrical, Computer, and Software Engineering, the University of Auckland, Auckland, New Zealand
Lixiang Jackie Zou
Affiliation:
Department of Electrical, Computer, and Software Engineering, the University of Auckland, Auckland, New Zealand
Guanguan Zhang*
Affiliation:
School of Control Science and Engineering, Shandong University, Jinan, China
Mei Su
Affiliation:
School of Automation, Central South University, Changsha, China Hunan Provincial Key Laboratory of Power Electronics Equipment and Grid, Changsha, China
Aiguo Patrick Hu
Affiliation:
Department of Electrical, Computer, and Software Engineering, the University of Auckland, Auckland, New Zealand
*
Author for correspondence: Guanguan Zhang, School of Control Science and Engineering, Shandong University, Jinan, China. E-mail: dr_zgg@163.com
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Abstract

In this paper, possible coupling configurations of a four-plate capacitive power transfer system are studied by varying the combinations of its input and output ports. A voltage source is applied between two of the four plates, and a load is connected to the other two to form different circuit topologies. A mathematical model based on a 4 × 4 mutual capacitance matrix is established for equidistantly placed four identical metal plates. Based on the proposed model, four separate circuit topologies are identified and analysed in detail and described in a general form. The electric field distributions of the coupling configurations are simulated by ANSYS Maxwell. The theoretical modeling and analysis are then verified by a practical system, in which four aluminum plates of 300 mm × 300 mm are used and placed with a gap of 10 mm between adjacent plates. The experimental results show that the measured output voltage and power under the four coupling configurations are in good agreement with the theoretical results. It has found that the voltage gain is the highest when the two inner plates are connected to the source, and this coupling configuration also has the lowest leakage electric field.

Keywords

Capacitive power transfercoupling configurationelectric field distributionfour metal platesmutual capacitance matrix
Type
Research Article
Information
Wireless Power Transfer , Volume 6 , Issue 2 , September 2019 , pp. 97 - 112
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Copyright
Copyright © Cambridge University Press 2019

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