Design and Implementation of Shaped Magnetic-Resonance-Based Wireless Power Transfer System for Roadway-Powered Moving Electric Vehicles

TLDR

Wireless power transfer enables roadway charging of electric vehicles. The paper presents the design and implementation of a wireless power transfer system for moving electric vehicles, including an online vehicle system example. The system comprises an inverter, power lines, pickup, rectifier, regulator, and an optimized core for a large air gap, with electromotive force shielding, and was implemented and tested. Experiments achieved 100‑kW power transfer with 80% efficiency at a 26‑cm air gap.

Abstract

In this paper, the design and implementation of a wireless power transfer system for moving electric vehicles along with an example of an online electric vehicle system are presented. Electric vehicles are charged on roadway by wireless power transfer technology. Electrical and practical designs of the inverter, power lines, pickup, rectifier, and regulator as well as an optimized core structure design for a large air gap are described. Also, electromotive force shielding for the electric vehicle is suggested. The overall system was implemented and tested. The experimental results showed that 100-kW power with 80% power transfer efficiency under 26-cm air gap was acquired.