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A Coupling Capacitor Double-Resonance Topology for Electric-Field Coupled Power Transfer System Using Vehicle Tire

Journal Article
02-15-03-0012
ISSN: 1946-391X, e-ISSN: 1946-3928
DOI: https://doi.org/10.4271/02-15-03-0012
Published November 03, 2021 by SAE International in United States
A Coupling Capacitor Double-Resonance Topology for Electric-Field Coupled Power Transfer System Using Vehicle Tire
Citation: Chen, X. and Chen, Z., "A Coupling Capacitor Double-Resonance Topology for Electric-Field Coupled Power Transfer System Using Vehicle Tire," SAE Int. J. Commer. Veh. 15(3):239-248, 2022, https://doi.org/10.4271/02-15-03-0012.
Language: English

Abstract:

The electric-field coupled power transfer (ECPT) system with a coupling capacitor double-resonance circuit is proposed for electric vehicle (EV) charging. The article analyzes the plate capacitors between the EV and ground copperplate and introduces the coupling capacitor double-resonance circuit. The two-port network impedance matching of two topologies coupling capacitor double resonance is simulated, and then double side L impedance matching network and coupling capacitor double resonance with Series-Series (S-S) topology are proposed to solve the transmission efficiency decrease led by plate capacitances’ fluctuation. A prototype of the ECPT system is designed and built to prove the validity of the proposed methods. It is shown that the ECPT system realized higher than 60 W of electrical power, which is dynamic wireless transferred through the tire steel belt and the ground copperplate with at least 88% efficiency when the tires are rolling.