| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless power transmission system that can prevent a reduction in energy transmission efficiency by avoiding using a frequency unsuitable for energy transmission in power transmission. <P>SOLUTION: A power transmitting side circuit unit 11 includes: an open coil 14 for generating an oscillating magnetic field; a resonant frequency switching circuit 15 for changing the frequency of the oscillating magnetic field; a frequency controller 103 for controlling the resonant frequency switching circuit 15 so as to exclude channels (frequency bands) of decreased efficiency of power transmission to a power receiving side from frequencies of the oscillating magnetic field for power transmission; and a control circuit 101 for controlling the frequency controller 103. The control circuit 101 compares information on received power received from the power receiving side via a communication circuit 105 with information on transmitted power transmitted to the power receiving side to identify channels of decreased efficiency of power transmission to the power receiving side, and controls the frequency controller 103 so as to exclude the channels. <P>COPYRIGHT: (C)2012,JPO&INPIT |
