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Wireless power transfer (WPT) is studied for battery charging in the IoT world. WPT via electric coupling is studied for apparatuses in water using the effect of large dielectric constant of water. One electrode is isolated from water and another electrode is exposed in water for underwater WPT. The power transfer efficiency is over 75%.
Wireless power transfer (WPT) is important for battery charging in the IoT world. WPT via electric coupling is studied for apparatuses in water. Dielectric constant of water is about 80 times larger than that of air and the transfer ability will be higher. The experimental results of WPT with capacitors were compared with the simulation using the equivalent circuit.
The paper discuses an important construction aspects of resonant wireless power transfer (WPT) system for small portable devices. It focuses mainly on key electrical parameters of the systems resonant linkage and its proper construction shape. All presented theoretical presumptions are consequently verified by detailed measurement.
We investigated an optimization condition for a maximum power transmission between coils wirelessly. Due to the resonant coupling nature of the system, for the highest power transmission, there is an optimum distance between the power (receiving) coil and sending (load) coil for a fixed distance between the sending coil and receiving coil. This effect cannot be explained by a conventional magnetic...
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