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Shielded Capacitive Power Transfer (S-CPT) without Secondary Side Inductors

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
Faculty of Electrical and Electronic Engineering Technology, Universiti Teknikal Malaysia Melaka, Malacca 76100, Malaysia
Research Centre for Electrical Power and Mechatronics, Indonesian Institute of Sciences, Bandung 40135, Indonesia
CEMSE Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
Author to whom correspondence should be addressed.
Academic Editor: ByoungHee Lee
Energies 2021, 14(15), 4590;
Received: 8 June 2021 / Revised: 21 July 2021 / Accepted: 27 July 2021 / Published: 29 July 2021
(This article belongs to the Special Issue Research on Wireless Power Transfer System)
In this study, we propose a four-plate structure with two shielding plates to produce shielded capacitive power transfer (S-CPT) at an operating frequency of 6.78 MHz for a 10 W system. By eliminating the inductors at the secondary side to form an asymmetrical topology, an S-CPT system was developed with a class-E power amplifier. Using MATLAB software, analysis was performed to obtain the parameters in the S-CPT system regarding resonance and impedance matching, and the proposed coupler structure was investigated through electric field simulation. The shield plate voltage stability was also investigated by analysing both the simulation and hardware experiment results. A prototype of S-CPT was established to validate the analysis results and to demonstrate the voltage at the shield plate of the proposed coupler structure. The experimental results are in good agreement with the simulation results. The proposed S-CPT exhibits an AC–AC efficiency of 84%, with a 56% voltage ground stability reduction because of implementing a balun. View Full-Text
Keywords: wireless power transfer; capacitive; class-E inverter wireless power transfer; capacitive; class-E inverter
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MDPI and ACS Style

Ahmad, S.; Muharam, A.; Hattori, R.; Uezu, A.; Mostafa, T.M. Shielded Capacitive Power Transfer (S-CPT) without Secondary Side Inductors. Energies 2021, 14, 4590.

AMA Style

Ahmad S, Muharam A, Hattori R, Uezu A, Mostafa TM. Shielded Capacitive Power Transfer (S-CPT) without Secondary Side Inductors. Energies. 2021; 14(15):4590.

Chicago/Turabian Style

Ahmad, Suziana, Aam Muharam, Reiji Hattori, Anyu Uezu, and Tarek M. Mostafa 2021. "Shielded Capacitive Power Transfer (S-CPT) without Secondary Side Inductors" Energies 14, no. 15: 4590.

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