Design and Implementation of an Underwater Spatial Omnidirectional Wireless Power Transfer System

In recent years, underwater wireless power transmission technology has developed rapidly. Research on omnidirectional wireless power transmission technology in underwater spatial has become increasingly important. Underwater electromechanical devices in the wireless power transmission process and submarine currents’ interference easily cause the radial and axial offset of the transmitting and receiving coils, resulting in changes in the coupling coefficient between the coils, reducing the efficiency and stability of the system energy transmission. The research on the mechanism of underwater spatial omnidirectional wireless power transfer systems has become an urgent problem to be solved in the field of underwater wireless power transmission. To solve this problem, this paper proposes a tri-orthogonal three-dimensional square coil structure that generates an omnidirectional magnetic field in a specific region. An underwater spatial omnidirectional wireless power transfer system is constructed, and theoretical analysis and formula derivation are carried out. Maxwell software is used to simulate the multidimensional electromagnetic field. An experimental verification platform is built, and the experimental results verify the feasibility of the underwater spatial omnidirectional wireless power transfer system, which meets the practical requirements. This design has reference and guiding significance for related industries.