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COIL OPTIMIZATION DESIGN OF THE HORN SHAPE FOR UNDERWATER WIRELESS POWER TRANSFER

In the application scenarios of underwater wireless power transfer (WPT), a horn shape coil is proposed in this paper. Aiming to obtain the uniform magnetic field in a specific area, the horn shape coil is optimized by reasonably setting the tilt angle and the spacing of the turns. Moreover, the horn coil with optimal tilt angle and the horn coil with uneven spacing are designed. Considering the eddy current loss in seawater, the model of WPT system in seawater is established using the 3D electromagnetic simulator. Through simulation and analysis of eddy current loss under different conditions, the influence of eddy current loss on efficiency is illustrated. Finally, the transfer efficiency and output power are obtained by simulation and calculation. Also, the performance of the designed system is evaluated. It is found that the proposed system can effectively enhance the stability and anti-offset capability of WPT system, and then obtain the stable and efficient output.