Patent ID: 9682631
Date: 2017-06-20
CPC Classifications: B60L,Y02E,Y02T,Y04S

Claim:
1. A non-contact electricity supply device comprising: a power-supply-side coil configured to receive an alternating current, which is supplied from an AC power source to produce a magnetic flux; a power-supply-side capacitor connected in parallel with the power-supply-side coil to form, with the power-supply-side coil, a resonant circuit; a power-supply-side filter circuit connected between the AC power source and the power-supply-side coil, to which the power-supply-side capacitor is connected, the power-supply-side filter circuit including a reactor and a capacitor, which are connected in series; and a power-receiving-side coil configured to be interlinked with a magnetic flux produced by the power-supply-side coil to produce an alternating current, wherein the capacitance of the capacitor and the inductance of the reactor of the power-supply-side filter circuit, the capacitance of the power-supply-side capacitor, and the inductance of the power-supply-side coil are set, such that, a circuit, which includes the power-supply-side filter circuit, the power-supply-side capacitor, and the power-supply-side coil, has an impedance having a frequency characteristic, in which a frequency of a minimum point of the impedance, which is formed on a high-frequency side relative to a maximum point of the impedance, is greater than a frequency of a fundamental wave of an alternating current supplied from the AC power source and is less than a frequency of a third order wave of the fundamental wave, the capacitance of the capacitor and the inductance of the reactor of the power-supply-side filter circuit, the capacitance of the power-supply-side capacitor, and the inductance of the power-supply-side coil are set, such that, the frequency of the minimum point of the impedance formed on the high-frequency side relative to the maximum point of the impedance is other than a frequency of a second order wave of the fundamental wave of an alternating current supplied from the AC power source, the capacitance of the capacitor and the inductance of the reactor of the power-supply-side filter circuit, the capacitance of the power-supply-side capacitor, and the inductance of the power-supply-side coil are set, such that, the frequency of the minimum point of the impedance formed on the high-frequency side relative to the maximum point of the impedance is greater than the frequency of the second order wave of the fundamental wave of an alternating current supplied from the AC power source and is less than the frequency of the third order wave of the fundamental wave, and the capacitance of the capacitor and the inductance of the reactor of the power-supply-side filter circuit, the capacitance of the power-supply-side capacitor, and the inductance of the power-supply-side coil are set, such that, the frequency of the minimum point of the impedance formed on the high-frequency side relative to the maximum point of the impedance is 2.5 times the frequency of the fundamental wave of an alternating current supplied from the AC power source.