Integrated Electromagnetic Optimization of Archimedean Coil Geometries With Passive Shielding for High-Efficiency Wireless Electric Vehicle Charging

Abstract

This article presents a unified electromagnetic modeling and parametric performance analysis of circular and square Archimedean coil geometries for wireless electric vehicle (EV) charging, incorporating passive magnetic shielding and resonant compensation. 3D finite element analysis (FEA) was used to evaluate ferrite–aluminum shielding under Series–Series (SS) and Series–Parallel (SP) compensation topologies. Key performance indicators, including coupling coefficient, mutual inductance, and transfer efficiency, are analyzed under identical operating conditions to ensure fair comparison. Simulation results demonstrate that the shielded circular coil achieves a coupling factor of 0.43 and an efficiency of 88.9% under Series–Parallel (SP) compensation, outperforming the square counterpart. The shielding configuration reduces magnetic leakage by over 20% in both geometries. Additionally, sensitivity analysis under lateral misalignment and air gap variation confirms the robustness and interoperability of the circular design. This work provides actionable insights into the development of efficient, robust, and standards-compliant wireless charging systems for EVs.

Cite this article as: N. Oumidou, A. Abbou, S. Khalil and M. Cherkaoui, “Integrated electromagnetic optimization of Archimedean coil geometries with passive shielding for high-efficiency wireless electric vehicle charging,” Electrica, 26, 0263, 2026. doi: 10.5152/electrica.2026.25263.