A coil structure applied in WPT system for reducing eddy loss

Seawater submerged wireless power transfer systems inevitably suffer some energy loss as a consequence of eddy loss. Here we present a coil structure utilizing two transmitter coils placed symmetrically adjacent to each side of the receiver coil. This coil arrangement, termed a 1×1×1 structure, yields improved power transfer efficiency. The eddy loss from the 1×1×1 structure is reduced to half of that from a comparable 1×1, one transmitter and one receiver coil, structure. The experimental results show that the power transfer efficiency from transmitter to receiver side was improved about 10%.