Simultaneous Wireless Power and Data Transfer System for Autonomous Underwater Vehicles Using a Three-Channel Magnetically Integrated Coupler

Both crosstalk between power and data channels and intensified common-mode (CM) noise in conductive seawater degrade the performance of simultaneous wireless power and data transfer (SWPDT) for autonomous underwater vehicles (AUVs). While existing solutions utilize discrete magnetic components, they often result in increased volume and mass. This letter proposes a three-channel magnetic integration method that achieves synergy through the co-design of the compensation topology and magnetic coupler. To mitigate interference, an XS-S compensation topology is employed to ensure load-independent constant-voltage output and robust CM noise suppression by balancing inverter-output port-To-ground parasitic capacitances. Furthermore, a three-channel integrated coupler featuring orthogonal flux paths is developed to ensure high magnetic decoupling. Experimental results validate the approach, demonstrating 1 kW power transfer at 92.7% efficiency, a 5.68 Mb/s full-duplex underwater data rate under 1 kW SWPDT, and experimentally verified CM-noise suppression compared with the baseline LCC-S topology.