ON -THE GO WIRELESS CHARGING FOR ELECTRIC VEHICLE

Paper ID: EIJTEM_2025_12_4_258-264

Author's Name: Boppani Om Chandra Shanthi Swaroop Kumar, Mr. N. Samuel Babu

Volume: 12

Issue: 4

Year: 2025

Page No: 258-264

Abstract:

Wireless Power Transfer (WPT) enables the transmission of electrical energy without physical connections, offering benefits like no exposed wires, ease of charging, and safe operation in harsh environments. For electric vehicle (EV) applications, resonant inductive WPT is widely adopted for medium-to-high power transfer due to its high efficiency. This project focuses on designing and developing a WPT system to charge an electric city car powered by four 12 V, 100 Amp VRLA batteries and dual 4 kW in-wheel rear motors. The work began with an overview of wired EV chargers and WPT technologies, defining Figures of Merit (FOM) to assess performance under different load and coupling conditions. Various coil designs and magnetic core shapes were analyzed using FEM simulations in COMSOL, with a spiral coil structure proving most effective. The power stage design included resonating capacitors, PFC rectifier, high-frequency inverter, receiver-side rectifier, and a DC–DC chopper for controlled battery charging, integrating Wide Band Gap (WBG) devices to improve efficiency. A prototype WPT charger was assembled using available hardware, with experiments covering coil parameter measurement, system assembly, and performance validation. The study also explored emerging topics such as on-line electric vehicle (OLEV) charging, magnetic field shielding, and WPT operational standards.

Keywords: Electric Vehicle, Wireless Power Transfer, on-line electric vehicle, Wide Band Gap

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