| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-contact power transmission system for quickly protecting a power receiver from excessive power transmission.SOLUTION: The non-contact power transmission system comprises: a power transmission device 1 having a power feeding coil 14 serving as a power feeding part; a power receiving coil 21 serving as a power receiving part having a resonance circuit part; an impedance switch circuit part 22 serving as a resonance frequency change circuit part; and a power receiver 2 having a load 24. Power is transmitted to the power receiving coil 21 from the power feeding coil 14 in a non-contact manner. When signals for restraining a power feeding amount of a frequency fpu are transmitted to the power feeding coil 14 from the power receiving coil 21 by the impedance switch circuit part 22, an action for generating the signals for restraining the power feeding amount of the frequency fpu through the impedance switch circuit part 22 is performed, so as to restrain power transmission to the load 24 via the impedance switch circuit part 22. Furthermore, the power feeding coil 14 receives the signals for restraining the power feeding amount of the frequency fpu from the power receiving coil 21, so that the power fed from the power feeding coil 14 to the power receiving coil 21 is reduced. Therefore, the power fed to the load 24 is restrained. |
