| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless power feeder capable of automatically tuning a resonance frequency. <P>SOLUTION: An automatic tuning auxiliary circuit 30b is coupled to a transmission antenna 20, and injects a correction current I<SB POS="POST">A</SB>to the transmission antenna 20 or extracts the correction current I<SB POS="POST">A</SB>from the transmission antenna 20. An H-bridge circuit 36 is arranged between a first terminal 31 and a second terminal 32 which are coupled to the transmission antenna 20, and switched at the same frequency as a frequency of a driving voltage V<SB POS="POST">DRV</SB>. A third auxiliary coil L<SB POS="POST">A3</SB>is arranged between output terminals of the H-bridge circuit 36. <P>COPYRIGHT: (C)2013,JPO&INPIT |
