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US 12,597,807 B2Granted
Power feeding system, power feeding apparatus, and power feeding method
AssigneeMINEBEA MITSUMI Inc.
InventorMasaaki Fujii
Life of this patent
Estimating the term…
Abstract
A power feeding system includes a power transmission control circuit configured to select one of a plurality of first antennas included in a plurality of antennas, and while transmitting a first power transmission signal having a fixed power transmission phase for a non-selected first antenna among the plurality of first antennas, to perform, while selecting the plurality of first antennas one by one, both a first power transmission process of transmitting a first power transmission signal having a predetermined phase from a selected first antenna, and a second power transmission process of transmitting a first power transmission signal having an inverted phase obtained by inverting the predetermined phase from the selected first antenna.
Claims12
A power feeding system comprising:
- a power feeding apparatus;
- and
- a power receiving device configured to receive power transmission signals transmitted from the power feeding apparatus,
- wherein the power feeding apparatus includes
- an array antenna including a plurality of antennas configured to transmit power, and
- a power transmission control circuit configured to control phases of the power transmission signals that are to be transmitted from the plurality of antennas to the power receiving device, and control power transmission,
- wherein the power transmission control circuit is configured to
- select one of a plurality of first antennas included in the plurality of antennas, and
- while transmitting a first power transmission signal having a fixed power transmission phase for a non-selected first antenna among the plurality of first antennas, perform, while selecting the plurality of first antennas one by one, both:
- a first power transmission process of transmitting a first power transmission signal having a predetermined phase from the selected first antenna, and
- a second power transmission process of transmitting a first power transmission signal having an inverted phase obtained by inverting the predetermined phase from the selected first antenna,
- wherein the power receiving device is configured to:
- determine a difference signal between:
- a first combined signal, which combines the first power transmission signal having the predetermined phase and the first power transmission signal having the fixed power transmission phase, the first power transmission signal having the predetermined phase and the first power transmission signal having the fixed power transmission phase being both received from the plurality of first antennas in the first power transmission process, and
- a second combined signal, which combines the first power transmission signal having the inverted phase and the first power transmission signal having the fixed power transmission phase, the first power transmission signal having the inverted phase and the first power transmission signal having the fixed power transmission phase being both received from the plurality of first antennas in the second power transmission process, and
- transmit the difference signal to the power transmission control circuit, and
- wherein the power transmission control circuit is configured to control phases of power transmission of the plurality of first antennas, based on a plurality of difference signals obtained by selecting each of the plurality of first antennas.
14 more elements
A power feeding apparatus for transmitting power transmission signals to a power receiving device, comprising:
- an array antenna including a plurality of antennas configured to transmit power;
- and
- a power transmission control circuit configured to control phases of the power transmission signals that are to be transmitted from the plurality of antennas to the power receiving device, and control power transmission,
- wherein the power transmission control circuit is configured to:
- select one of a plurality of first antennas included in the plurality of antennas,
- while transmitting a first power transmission signal having a fixed power transmission phase for a non-selected first antenna among the plurality of first antennas, perform, while selecting the plurality of first antennas one by one, both:
- a first power transmission process of transmitting a first power transmission signal having a predetermined phase from the selected first antenna, and
- a second power transmission process of transmitting a first power transmission signal having an inverted phase obtained by inverting the predetermined phase from the selected first antenna, and
- control phases of power transmission of the plurality of first antennas, based on a plurality of difference signals obtained by selecting each of the plurality of first antennas, and
- wherein each of the plurality of difference signals is a difference signal between:
- a first combined signal, which combines the first power transmission signal having the predetermined phase and the first power transmission signal having the fixed power transmission phase, the first power transmission signal having the predetermined phase and the first power transmission signal having the fixed power transmission phase being both received by the power receiving device from the plurality of first antennas in the first power transmission process, and
- a second combined signal, which combines the first power transmission signal having the inverted phase and the first power transmission signal having the fixed power transmission phase, the first power transmission signal having the inverted phase and the first power transmission signal having the fixed power transmission phase being both received by the power receiving device from the plurality of first antennas in the second power transmission process.
9 more elements
A power feeding method executed by a power feeding system including a power feeding apparatus, and a power receiving device configured to receive power transmission signals transmitted from the power feeding apparatus, the power feeding apparatus including:
- an array antenna including a plurality of antennas configured to transmit power, and
- a power transmission control circuit configured to control phases of the power transmission signals that are to be transmitted from the plurality of antennas to the power receiving device, and control power transmission, the power feeding method comprising:
- by the power transmission control circuit,
- selecting one of a plurality of first antennas included in the plurality of antennas,
- while transmitting a first power transmission signal having a fixed power transmission phase for a non-selected first antenna among the plurality of first antennas, performing, while selecting the plurality of first antennas one by one, both:
- a first power transmission process of transmitting a first power transmission signal having a predetermined phase from the selected first antenna, and
- a second power transmission process of transmitting a first power transmission signal having an inverted phase obtained by inverting the predetermined phase from the selected first antenna;
- by the power receiving device, determining a difference signal between:
- a first combined signal, which combines the first power transmission signal having the predetermined phase and the first power transmission signal having the fixed power transmission phase, the first power transmission signal having the predetermined phase and the first power transmission signal having the fixed power transmission phase being both received from the plurality of first antennas in the first power transmission process, and
- a second combined signal, which combines the first power transmission signal having the inverted phase and the first power transmission signal having the fixed power transmission phase, the first power transmission signal having the inverted phase and the first power transmission signal having the fixed power transmission phase being both received from the plurality of first antennas in the second power transmission process, and
- transmitting the difference signal to the power transmission control circuit;
- and
- by the power transmission control circuit, controlling phases of power transmission of the plurality of first antennas, based on a plurality of difference signals obtained by selecting each of the plurality of first antennas.
10 more elements
Dependencies are inferred from the claim text.