| 摘要 |
The present invention addresses the problem of enabling charging with a sufficient power-supply efficiency even when the relative position between a primary coil and a secondary coil is shifted. A wireless power-supply device (2) of the present invention comprises an inverter circuit (21), a capacitance adjustment circuit (22) having a primary side capacitor (C11), a control circuit (23), and a primary side coil (L1). The control circuit (23) starts up so that first drive signals (G11, G14 (G12, G13)) applied to first switching elements (S11 to S14) and second drive signals (G22, G23 (G21, G24)) applied to second switching elements (S21 to S24) match each other in phase. After the start-up, the control circuit (23) performs control so that the phase of the second drive signals (G21, G24 (G22, G23)) advances compared to the phase of the first drive signals (G12, G13 (G11, G14)). |
