| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless power transmission device that can detect the relative position between a primary coil and a secondary coil. <P>SOLUTION: A wireless power transmission device comprises: a primary coil 19 supplying a power to a secondary coil 21 by electromagnetic induction; a driving circuit 17 supplying AC power to the primary coil 19; a current detection circuit 11 detecting an input current Iin supplied to the driving circuit 17; and a control circuit 15 to which the detection result of the current detection circuit 11 is supplied. The control circuit 15 drives the driving circuit 17 by a predetermined driving frequency fdr and detects the relative position between the primary coil 19 and the secondary coil 21 based on the input current Iin flowing during the driving. <P>COPYRIGHT: (C)2012,JPO&INPIT |
