In-Motion Charging Coil Configuration for the Improved Battery Charging of Electric Vehicles

The rapid development of electric vehicles (EVs) has highlighted the need for more efficient and convenient charging solutions. In-motion charging coil configurations present a promising advancement, allowing continuous wireless power transfer to EVs as they move, thus reducing downtime and improving overall battery performance. Dynamic wireless charging (DWC) systems, which enable In-Motion Charging Systems (IMCS) are posing prolific and profound impact on the charging of the Electric Vehicles (EVs). This paper presents a comprehensive analysis of coil configurations for in-motion electric vehicle (EV) charging, focusing on geometric optimization through the evaluation of mutual inductance and power transfer efficiency. A critical examination of in-motion charging coil design is conducted to ensure operation across a wide range of conditions while maximizing efficiency. Numerical simulations demonstrate that by fine-tuning key parameters, the magnetic coupler's performance can be enhanced to meet specific operating requirements. The results indicate a substantial improvement in coil-to-coil power transfer efficiency, reaching up to 94%, even with significant variations in battery equivalent resistance <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(R_{beq})$</tex> from 13% to 92%.