| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve power transmission efficiency in resonant-type wireless power feeding. <P>SOLUTION: Power is transmitted by magnetic resonance from a power feeding coil L<SB>2</SB>to a power receiving coil L<SB>3</SB>. A power supply control circuit 200 initially supplies power to an excitation circuit 110 via a coupling transformer T2. An excitation coil L<SB>1</SB>of the excitation circuit 110 is magnetically coupled to the power feeding coil L<SB>2</SB>. The power supply control circuit 200 alternately turns on and off a switching transistor Q<SB>1</SB>and a switching transistor Q<SB>2</SB>, thereby feeding AC power to the excitation circuit 110. <P>COPYRIGHT: (C)2011,JPO&INPIT |
