Patent attributes
A power receiver device a noncontact power supply apparatus short-circuits a resonance suppressing coil provided so as to be electromagnetically coupled to a receiver coil and notifies a power transmitter device of an output voltage abnormality when a measured value of output voltage becomes equal to or greater than an upper limit threshold, the measured value of output voltage being obtained by rectifying power received via a resonance circuit including a receiver coil configured to receive power from a transmitter coil of the power transmitter device and a resonance capacitor connected in parallel with the receiver coil. Upon receipt of the notification of the output voltage abnormality, the power transmitter device changes at least one of a voltage and switching frequency of AC power applied to the transmitter coil.
