Effect of Water and/or Dielectric Materials for Resonant Type Wireless Power Transfer System

Abstract

Wireless power transfer (WPT) system is one of the promising way to connect the power supply and the electrical appliances with freedom of the product layout for the next generation. At this time, the several kinds of WPT system have been proposed. Among of them, we have focused on the resonant type WPT system composed of the loop coils as the transmitting and receiving units and the resonators enhance the specified electromagnetic energy to transmit the electric power. This system has been much attractive because of its efficient power transmission especially for the middle-range distance such as the outdoor power supply to the electric vehicles. To put the stable and effective WPT system of this type into practical use, it is necessary to inspect the influence of the disturbing objects come into the transmission pass of the system. In this paper, the effect of the water and the dielectrics used as the package of the unit come into the system has been discussed. In addition, one of the ways to recover the deterioration of the transmission efficiency due to the disturbing objects has been demonstrated.