Design and optimization of high-efficiency anti-misalignment resonant coils for wireless charging of electric vehicles

Abstract

This study introduces a new way to improve the anti-misalignment capability of wireless power transfer (WPT) systems for electric vehicles (EVs) by design and optimisation of the resonant coils. Addressing the common challenge of coil alignment, which has a significant impact on WPT. A new resonant coil structure is designed which will minimise the effects of misalignment. This paper includes a detailed theoretical analysis of coil structure, followed by the simulation and construction of circular and rounded corner rectangular coil designs. When comparing various coil geometries and introducing a new anti-misalignment feature, the mutual inductance and coupling coefficient has shown an improvement. This paper suggest that a strategic design of resonant coils could significantly improve the EV charging process.