| 摘要 |
PROBLEM TO BE SOLVED: To provide a noncontact power supply device by which information is transmitted from a mobile device or the like to a charger or the like with smaller electric power consumption while sharing a circuit used for power supply even when electric power is supplied from the charger or the like to the mobile device or the like in a noncontact manner. SOLUTION: The noncontact power supply device receives an alternating electric power supplied to a primary coil L1 by a secondary coil L2 which intersects the alternating magnetic flux generated from a primary coil L1 receiving the alternating electric power, and converts the received alternating electric power to DC power to be supplied to a battery BA. The noncontact power supply device is equipped with: a resonance circuit 22A which includes the secondary coil L2 and is constituted so that the circuit constant is changeable; a secondary-side control device 21 in which the circuit constant of the resonance circuit 22A is changed based on information to be transmitted to the primary coil L1 to modulate the amplitude of the alternating electric power to be received by the secondary coil L2; and a primary-side control device 11 which demodulates the information to be transmitted to the primary coil L1 from changes in the amplitude of the alternating electric power generated on the primary coil L1 in accordance with changes in the amplitude of the alternating electric power at the secondary coil L2. COPYRIGHT: (C)2011,JPO&INPIT |
