A New Coil Structure to Reduce Eddy Current Loss of WPT Systems for Underwater Vehicles | IEEE Journals & Magazine | IEEE Xplore

A New Coil Structure to Reduce Eddy Current Loss of WPT Systems for Underwater Vehicles


Abstract:

Wireless power transfer systems in seawater inevitably suffer some energy loss as a consequence of eddy current loss. Here, we present a coil structure utilizing two tran...Show More

Abstract:

Wireless power transfer systems in seawater inevitably suffer some energy loss as a consequence of eddy current 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 current loss caused by the transmitter coils in a 1 × 1 × 1 system can be reduced to roughly half of that in a 1 × 1 system, with one transmitter coil and one receiver coil. The experimental results show that the power transfer efficiency from the transmitter to the receiver is improved by nearly 10%. After the introduction of equivalent eddy current loss impedance into the circuit, two arrangements of the 1 × 1 × 1 circuit topology are investigated. They consist of a shared or separately compensated capacitance topology. It is found that the shared-compensated capacitance topology is more robust to the change of mutual inductance than the separately compensated capacitance topology. This kind of structure is very useful in underwater vehicle applications.
Published in: IEEE Transactions on Vehicular Technology ( Volume: 68, Issue: 1, January 2019)
Page(s): 245 - 253
Date of Publication: 25 November 2018

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