Patent ID: 11888326
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A contactless power supply device that supplies electric power to a vehicle in a contactless manner, the power supply device comprising:
a power transmission resonance circuit;
a power source circuit that supplies direct-current power; and
a power transmission circuit that converts the direct-current power of the power source circuit into alternating-current power and supplies the alternating-current power to the power transmission resonance circuit, wherein
the power transmission circuit includes:
an inverter circuit that converts the direct-current power of the power source circuit into alternating-current power; and
a power transmission-side immittance conversion circuit that adjusts the alternating-current power of the inverter circuit and supplies the adjusted alternating-current power to the power transmission resonance circuit, and

a characteristic impedance of the power transmission-side immittance conversion circuit is ⅕ or less of an impedance backward on the power transmission resonance circuit-side from the power transmission-side immittance conversion circuit.