D08.3 - A Unified Off-Board Charging System for Integrated Wired and Wireless EV Charging

This paper proposes a unified off-board charging system that integrates both wired and wireless charging functionalities for electric vehicles. The proposed system is intended for charging stations where both conductive and wireless charging are supported within a single platform. Conventional implementations typically require two separate systems due to the fundamentally different circuit topologies of wired and wireless charging, resulting in increased cost and volume. To address this issue, the proposed converter employs a reconfigurable topology that operates as an LLC resonant converter for wired charging and as an LCC-S compensated converter for wireless charging. In both modes, the system reuses key components—including active switch bridges, magnetic coupler coils, and resonant components—without requiring additional components such as relays. This architecture enables significant reductions in system cost and size, while maintaining mode-specific functionality. The proposed system has been validated through a 3.3 kW hardware prototype and experimental results.