Development of capacitive wireless power transfer coupler for underwater EV charging application

Tajul Aris, Nurul Aimi Syafiqah (2025) Development of capacitive wireless power transfer coupler for underwater EV charging application. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Wireless power transfer (WPT) has gained significant attention as a promising technology for charging and powering electronic devices without the need for physical connections. Capacitive wireless power transfer makes it possible to transfer power between devices without making direct contact by doing away with the need for physical connectors or cables. The capacitive Power Transfer (CPT) coupler for underwater electric vehicle (EV) charging, addressing the limitations of underwater environments. This project investigates the design, simulation and implementation of a CPT coupler tailored for underwater EV applications addressing the unique limitations posed by varying dielectric properties of different underwater mediums. The study begins with the calculation of parameters for two-plate and four-plate CPT couplers using MATLAB simulations, focusing on capacitance values across air, freshwater and seawater. The results demonstrated consistent alignment with theoretical predictions and validating the simulation approach. Then, the focus shifted on developing capacitive wireless power transfer coupler for underwater EV charging application using printed circuit board. This phase successfully demonstrated the fabrication and assembly process for the coupler achieving the second objective. Lastly, analyzing the development of capacitive wireless power transfer coupler for underwater EV charging application using real time experiment demonstrating efficient power transfer across the tested mediums. The findings of this research highlight the potential of CPT technology in enabling reliable and efficient underwater wireless charging systems with significant implications for electric ship charging and subsea power applications. By doing this, could improve and analyze the efficiency of underwater wireless charging by focusing all electricity on the charging vehicle.

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