Compact Single-Stage Optimized Power Electronic Converter for Dual-Mode Wired and Wireless Technologies for Versatile EV Charging Infrastructure

• This research presents a novel single-stage power electronic converter that effectively integrates both wired and wireless charging for electric vehicles (EVs) within a unified system. • The proposed design eliminates the necessity for separate converters for wired and wireless charging, thereby reducing system complexity, component count, and overall costs . • A single power conversion stage is employed to seamlessly manage both charging modes, enhancing efficiency and ensuring optimal power utilisation . • A compact high-frequency transformer is integrated into the system to provide galvanic isolation in wired charging mode, leading to reduced core losses and improved power density . • The transformer is designed to minimize leakage inductance , thereby optimizing performance at high switching frequencies and improving overall system efficiency. • Featuring a compact, high-efficiency design , the system reduces power stages, enhancing compactness and efficiency, rated at 3.3kW and operating at 85 kHz. • Simulation and real-time validation confirm performance through MATLAB/Simulink and a 3.3kW hardware prototype , confirming the effectiveness of the proposed system. The advancement of electric vehicle (EV) charging infrastructure has been constrained by the limitations of conventional power conversion systems. Traditional designs typically require separate converters for wired and wireless charging, leading to increased system complexity, higher costs, and reduced efficiency. Additionally, the commonly used two-level voltage source converters (VSCs) in EV charging stations face challenges such as limited power handling capability, high harmonic distortion, and the necessity for elevated switching frequencies, all of which hinder the large-scale adoption of EVs. This paper presents a novel compact single-stage power electronic converter that integrates both wired and wireless charging functionalities within a unified framework. By eliminating the need for additional converters and power conversion stages, the proposed system minimizes component count, enhances reliability, and improves overall efficiency. A key advantage of this design is its ability to seamlessly switch between wired and wireless charging modes, offering enhanced flexibility for EV users and charging station operators. The system employs series-series compensation for wired charging and LCC-series compensation for wireless charging. A high-frequency transformer is utilized to enable isolated power transfer in wired mode, while circular coils facilitate wireless power transmission. To validate the theoretical performance, ANSYS simulations were performed to analyze the characteristics and efficiency of the wireless power transfer coils. A 3.3kW laboratory model of the proposed hybrid bidirectional EV charging infrastructure and obtained peak efficiency of 92.5%. To further demonstrate the feasibility of the proposed approach, a hardware prototype was developed and tested under real-world conditions.