Hybrid Compensation Based Efficient Wireless Charging System Design With Solar Photovoltaic Interface Toward Sustainable Transportation

Abstract

The adoption of wireless charging for Electric Vehicles (EVs) is on the rise, promising enhanced user convenience. Concurrently, there is a pressing need for increased integration of renewable energy into the transportation sector to mitigate greenhouse gas emissions. However, wireless charging systems face challenges such as power transfer fluctuations under load and variations in coupling coefficients. This research introduces a novel solution: a Photovoltaic (PV)-integrated hybrid-compensated wireless charging system tailored for EV applications. The study addresses critical hurdles in achieving optimal efficiency and power delivery while accommodating significant misalignments inherent in Wireless Power Transfer (WPT) systems, particularly beneficial for EV charging. Compared to conventional compensation WPT systems, the proposed hybrid compensation approach significantly enhances transfer efficiency and reduces system current stress. The paper proposes the utilization of S-LCC/SP-compensated constant current (CC) and constant voltage (CV) system for PV-integrated static WPT systems. Experimental validation of the proposed system is conducted on a 3.3-kW laboratory-scale prototype. The findings demonstrate consistent power transfer across a 100-200 mm air gap, maintaining an efficiency of 91.3%. These results confirm the effectiveness of the proposed system in real-world applications.