An Overview of Wireless Charging Technologies for Electric Vehicles

Wireless charging technology for electric vehicles (EVs) is emerging as a revolutionary solution to address the limitations of traditional plug-in charging systems. It offers enhanced convenience, safety, and automation by enabling energy transfer without physical connectors. This paper provides a comprehensive overview of wireless charging technologies, focusing on the principles, classifications, and advancements in static, dynamic, and quasi-dynamic systems. The study examines the electromagnetic coupling mechanisms such as inductive power transfer (IPT), capacitive power transfer (CPT), and resonant inductive coupling (RIC), highlighting their advantages, limitations, and design considerations. The research also discusses the role of power electronics, control algorithms, and magnetic field alignment techniques in optimizing energy efficiency. A comparative evaluation of existing technologies is presented to demonstrate their performance in terms of transfer efficiency, cost, and interoperability. Furthermore, the paper explores research gaps, challenges, and potential future directions, emphasizing the need for standardization, material innovation, and smart-grid integration. The results underscore that while wireless charging is technically feasible, significant efforts are still required to achieve large-scale commercial adoption for both static and dynamic charging infrastructures.