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.
A Coupling Capacitor Double-Resonance Topology for Electric-Field Coupled Power Transfer System Using Vehicle Tire
Sae Int. J. Commer. Veh
Sae International Journal of Commercial Vehicles ; 15 , 3 ; 239-248
2021-11-03
10 pages
Conference paper
English
FILM CAPACITOR, COUPLED-TYPE CAPACITOR, INVERTER, AND ELECTRIC VEHICLE
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