POWER FEEDING SYSTEM AND VEHICLE
First Claim
1. A power feeding system, comprising:
- a power feeding installation; and
a power receiving unit to which the power feeding installation feeds power;
wherein;
the power feeding installation has;
a power supply device that produces power having a predetermined frequency a power transmission resonator that receives the power produced by the power supply device and generates an electromagnetic field via which the power is wirelessly transmitted to the power receiving unit, and a first communication device that sends power information on power at the power feeding installation to the power receiving unit; and
the power receiving unit has;
a power receiving resonator that wirelessly receives the power from the power transmission resonator by resonating with the power transmission resonator via the electromagnetic field,an impedance matching device that includes a variable impedance circuit so as to be capable of adjusting an impedance at a resonance system that is constituted of the power transmission resonator and the power receiving resonator,a second communication device that receives the power information sent from the first communication device, anda controller that controls the impedance matching device based on the power information received by the second communication device, said controller being capable of adjusting an impedance at the variable impedance circuit so that an input impedance at the resonance system is matched to an impedance at a section including the power supply device and adjacent to the resonance system.
1 Assignment
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Accused Products
Abstract
A power feeding system is provided, in which a detected value of reflected power at a power supply device in a power feeding installation is sent from the power feeding installation to a vehicle via a first communication device, the vehicle has an impedance matching device for adjusting an impedance at a resonance system that is constituted of a power transmission resonator, including a primary self-resonant coil and a primary coil in the power feeding installation, and a power receiving resonator, including a secondary self-resonant coil and a secondary coil in the vehicle, and the impedance matching device is controlled based on the detected value of the reflected power at the power supply device, which has been received from the power feeding installation.
15 Citations
15 Claims
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1. A power feeding system, comprising:
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a power feeding installation; and a power receiving unit to which the power feeding installation feeds power; wherein; the power feeding installation has; a power supply device that produces power having a predetermined frequency a power transmission resonator that receives the power produced by the power supply device and generates an electromagnetic field via which the power is wirelessly transmitted to the power receiving unit, and a first communication device that sends power information on power at the power feeding installation to the power receiving unit; and the power receiving unit has; a power receiving resonator that wirelessly receives the power from the power transmission resonator by resonating with the power transmission resonator via the electromagnetic field, an impedance matching device that includes a variable impedance circuit so as to be capable of adjusting an impedance at a resonance system that is constituted of the power transmission resonator and the power receiving resonator, a second communication device that receives the power information sent from the first communication device, and a controller that controls the impedance matching device based on the power information received by the second communication device, said controller being capable of adjusting an impedance at the variable impedance circuit so that an input impedance at the resonance system is matched to an impedance at a section including the power supply device and adjacent to the resonance system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle to which a power feeding installation wirelessly feeds power, wherein the power feeding installation generates, using a power transmission resonator, an electromagnetic field via which the power is wirelessly transmitted to the vehicle, and sends power information on power at the power feeding installation to the vehicle, the vehicle comprising:
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a power receiving resonator that wirelessly receives the power from the power transmission resonator by resonating with the power transmission resonator via the electromagnetic field; an impedance matching device that includes a variable impedance circuit so as to be capable of adjusting an impedance at a resonance system that is constituted of the power transmission resonator and the power receiving resonator; a communication device that receives the power information sent from the power feeding installation; and a controller that controls the impedance matching device based on the power information received by the communication device, said controller being capable of adjusting an impedance at the variable impedance circuit so that an input impedance at the resonance system is matched to an impedance at a section including the power supply device of the power feeding installation and adjacent to the resonance system. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification