Enhancing Electric Vehicle Charging through Magnetic Coupling Resonant Wireless Power Transfer Systems

Abstract

Wireless Power Transfer (WPT) is widely adopted in daily life for its safety, flexibility, and reliability. Magnetic coupled resonant radio energy transmission, notable for its long range and low power loss, is key to advancing wireless charging for electric vehicles. This study focuses on the magnetic coupling resonant system, analyzing its working principles using coupled-mode and circuit theories to understand factors affecting efficiency and power transmission. Key circuit topologies, including rectifiers, high-frequency inverters, couplers, and regulation circuits, are designed and analyzed using Ansys software. A complete circuit model is verified in Matlab, showing that the system achieves ≥75% efficiency and over 1kW charging power for electric vehicles.