| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a non-contact power supply device capable of preventing decrease of the power supplied to a load device as increase of signal detection accuracy. <P>SOLUTION: A power receiver 40 of a non-contact power supply device 1 has a load modulation part 70 that changes an induced voltage on a primary coil 21. The load to the load modulation part 70 includes a first load, a second load and a third load from the smallest load in order. The mode to switch the load to the load modulation part 70 includes a first switching mode in which the first load and the second load are alternately selected; and a second switching mode in which the first load and the third load are alternately selected. When the load current is small and a signal is transmitted from the power receiver 40 to a power transmission device 10, the load modulation part 70 is set to the first switching mode. When the load current is large and a signal is transmitted from the power receiver 40 to the power transmission device 10, the load modulation part 70 is set to the second switching mode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
