Wireless Power and Data Transfer System Using Multidirectional Magnetic Coupler for Swarm AUVs

In this letter, a simultaneous wireless power and data transfer system based on a novel multidirectional magnetic coupler is presented for the application of swarm AUVs. The transmitting coil consisting of two reversely wound helix loops can generate a multidirectional magnetic field in space, which supplies power to multiple arc-shaped receiving coils placed in different directions. Aiming at high coupling strength and low core volume, a multiobjective genetic algorithm is used to optimize coil parameters. In addition, a hybrid injection communication method based on LCC-S compensation topology is proposed and analyzed. An experiment platform is built and the results show that the system can achieve 92.25% efficiency at a power level of 200 W when four AUVs are powered. Meanwhile, the transferred data are successfully recovered at the data rate of 30 kbps.