2-D Misalignment-Tolerant Wireless Power Transfer With a Compact O-to-OXY Magnetic Coupler

The application of wireless power transfer (WPT) for consumer electronics, electric vehicles, and drones has garnered growing attention, with one of the key challenges being the ability to tolerate coil misalignment. This article proposes a WPT system with the LCC-S compensation and a novel O-to-OXY magnetic coupler to maintain high output power and transfer efficiency, aiming to tolerate coil misalignments in both lateral and longitudinal directions. The O and XY coils, representing planar and crossed-dipole coils, are coaxially stacked and naturally decoupled by sharing a common ferrite core to form a compact OXY receiver. Accordingly, a 500 W experimental prototype is developed to verify the effectiveness of the proposed system under different loads. The measured transfer efficiency of the proposed magnetic coupler can reach up to 64.86% at the misaligned distance of 150 mm, marking a 17.34% improvement of average efficiency than the traditional O-to-O magnetic coupler across the entire misalignment range. Additionally, the transfer power can be maximally increased by up to 200 W. Finally, both theoretical analyses and experimental results confirm the feasibility and stability of the proposed WPT system.