| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve power transmission efficiency in field 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>. First, a power supply control circuit 200 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 makes a switching transistor Q<SB>1</SB>and a switching transistor Q<SB>2</SB>, turn on and off, thereby feeding the AC power to the excitation circuit 110. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
