Non-contact power supply apparatus

A non-contact power supply apparatus comprising:

• a transmission-side pad that has a coil and generates magnetic flux by being supplied alternating-current power;
• a transmission-side resonant circuit that is connected to the transmission-side pad and configures a resonant circuit together with the coil of the transmission-side pad;
• a reception-side pad that has a different coil and generates an alternating current by interlinking with the magnetic flux generated by the transmission-side pad;
• a reception-side resonant circuit that is connected to the reception-side pad and configures a resonant circuit together with the coil of the reception-side pad;
• a power transmission circuit that is connected to a direct-current power supply and to the transmission-side pad, and that converts a direct current supplied from the direct-current power supply to an alternating current and supplies the alternating current to the transmission-side pad connected to the transmission-side resonant circuit;
• a power reception circuit that is connected to the reception-side pad connected to the reception-side resonant circuit and to a power supply target, and that converts an alternating current supplied from the reception-side pad to a direct current and supplies the direct current to the power supply target;
• and
• a control circuit that is connected to the power transmission circuit and the power reception circuit, and controls the power transmission circuit and the power reception circuit, wherein
• the control circuit is configured to control an alternating-current voltage supplied from the power transmission circuit to the transmission-side pad and an alternating-current voltage supplied from the reception-side pad to the power reception circuit, so that a power factor of the alternating current supplied from the power transmission circuit to the transmission-side pad and direct-current power supplied from the power reception circuit to the power supply target are respectively set to target values, and transmit electric power from the direct-current power supply to the power supply target.