review · IEEE Access
Wireless power transfer offers electric vehicle users automated, safe, low-maintenance, and reliable charging that matches the power rating and efficiency of conductive systems. A major technical hurdle is the decline in power transfer efficiency as the distance between charging coils increases. Achieving higher efficiency relies heavily on circuit design parameters, making systematic optimisation critical. Recent research focuses on methods to improve power transfer efficiency across diverse coil configurations, converter topologies, impedance matching, and compensation techniques. These approaches apply to static, quasi-dynamic, and dynamic charging operations. Synthesising these strategies highlights remaining technical gaps and outlines future developments required for practical charging systems. By evaluating different technical configurations, this review provides guidance for developers seeking optimal design combinations to enhance overall charging performance across different operating scenarios.
Adopting wireless charging can significantly improve convenience and automation for electric vehicle owners. However, energy losses over physical gaps remain a primary technical obstacle. Outlining how specific circuit components, coil designs, and compensation methods improve efficiency helps engineers design more practical, energy-efficient charging infrastructure that supports widespread transition to electric transport without sacrificing power performance.
This work informs electric vehicle hardware developers and charging infrastructure engineers seeking to design efficient wireless charging systems. Targeted applications encompass static vehicle parking, quasi-dynamic stops, and dynamic on-road charging. As a literature review identifying design trade-offs and research gaps rather than introducing a tested prototype, it serves as an early-stage reference to guide architecture selection.
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The increasing Electric Vehicle (EV) market is driven by the desire for more efficient and reliable approaches to recharge EV batteries. Among various charging methodologies for EVs, Wireless Power Transfer (WPT) has gained more attention from EV users due to its features such as safety, low maintenance, comfort, automated operation, and reliability. The innovative WPT method replaces the conductive charging system while maintaining a similar power rating and efficiency. Numerous strategies have been devised to enhance the efficiency and reliability of the WPT model. The primary challenge in WPT is reduction in power transfer efficiency (PTE) as the gap between the coils is increased. Also, the improvement in the PTE depends on various design parameters of the WPT circuit. Therefore, this review article thoroughly investigates recent significant research literatures that explains WPT technology and tailored towards enhancement of PTE. The investigation is carried on various coil configurations, converter topologies and different critical factors to improve PTE such as impedance matching, compensation techniques. Moreover, the research gaps in WPT technology and future scope suitable for static, quasi-dynamic, and dynamic charging methods are presented. This research can play a crucial role in assisting developers in selecting an optimal design to enhance the WPT system.
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DOI: 10.1109/access.2024.3378303
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