A wireless charging system for autonomous underwater vehicles based on Ω-shaped magnetic couplers

To ensure efficient and stable wireless charging of Autonomous Underwater Vehicles (AUVs) in complex underwater environments, a wireless charging system based on Ω-shaped magnetic coupling structure is proposed. First, Ω-shaped magnetic coupling structure is introduced featuring a bipolar transmitter and an arch-shaped receiver. This magnetic coupler enhances the misalignment tolerance and charging efficiency of AUV wireless charging while reducing stray magnetic interference. Second, to achieve constant current/voltage charging for the AUV, a closed-loop power controller is designed on the transmitter side based on the LCC-S compensation topology. Finally, a wireless complex charging platform is constructed and experimental results demonstrate that the wireless charging system can operate in a closed-loop state with an efficiency of 91.7% while charging at 1198.1 W. The proposed magnetic coupling structure exhibits strong misalignment resistance, thereby meeting the wireless charging requirements for AUVs in complex underwater environments.