| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power transmission system which can appropriately grasp displacement (coupling coefficient) between a power transmission antenna 108 and a power receiving antenna 202 and perform efficient power transmission. <P>SOLUTION: The power transmission system comprises: an inverter part 106 which converts DC voltage to AC voltage at predetermined frequency to output it; a power transmission antenna 108 to which the AC voltage from the inverter part 106 is inputted and transmits electric energy to a facing power receiving antenna 202 via an electromagnetic field; a current detection part 107 which detects current value flowing through the power transmission antenna 108; and a control part which controls the AC voltage outputted by the inverter part 106. In the power transmission system, the AC voltage of one cycle is outputted by the inverter part 106, and the coupling coefficient is derived between the power transmission antenna 108 and the power receiving antenna 202 on the basis of the time acquired from a transition of an envelope signal of the current value detected by the current detection part 107. <P>COPYRIGHT: (C)2013,JPO&INPIT |
