Apparatus and method for wireless power transmission
First Claim
Patent Images
1. A wireless power transmitter comprising:
- a source resonator configured to wirelessly transmit energy to a target device with at least one target resonator, the energy being stored in a capacitor; and
a feeding unit configured to generate an induced current flowing in the source resonator in the same direction as a direction of an input current flowing in a transmission line, the feeding unit being electrically connected to the capacitor and forming a closed loop with the source resonator,wherein, within a first region, a direction of a first magnetic field formed based on the input current is identical to a direction of a second magnetic field formed based on the induced current, and within a second region between the source resonator and the feeding unit, a direction of the first magnetic field is different from a direction of the second magnetic field.
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Abstract
An apparatus and method for efficiently, wirelessly transmitting a power to a plurality of target devices are provided. A wireless power transmitter may include: a source resonator configured to wirelessly transmit energy to a target device with at least one target resonator, the energy being stored in a capacitor; and a feeding unit configured to generate an induced current flowing in the source resonator in the same direction as a direction of an input current flowing in a transmission line, the feeding unit being electrically connected to the capacitor and forming a closed loop with the source resonator.
11 Citations
19 Claims
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1. A wireless power transmitter comprising:
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a source resonator configured to wirelessly transmit energy to a target device with at least one target resonator, the energy being stored in a capacitor; and a feeding unit configured to generate an induced current flowing in the source resonator in the same direction as a direction of an input current flowing in a transmission line, the feeding unit being electrically connected to the capacitor and forming a closed loop with the source resonator, wherein, within a first region, a direction of a first magnetic field formed based on the input current is identical to a direction of a second magnetic field formed based on the induced current, and within a second region between the source resonator and the feeding unit, a direction of the first magnetic field is different from a direction of the second magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless power transmission method comprising:
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wirelessly transmitting energy to a target device through a magnetic coupling with at least one target resonator, the energy being stored in a capacitor of a source resonator; generating, by a feeding unit, an induced current flowing in the source resonator in the same direction as a direction of an input current flowing in a transmission line, the feeding unit being electrically connected to both ends of the capacitor and forming a closed loop with the source resonator; and controlling a magnetic field formed within the source resonator to be uniformly distributed based on a direction of the induced current flowing in the source resonator and a direction of the input current flowing in the feeding unit, wherein the source resonator comprises; a first transmission line comprising a first signal conducting portion, a second signal conducting portion, and a first ground conducting portion, the first ground conducting portion corresponding to the first signal conducting portion and the second signal conducting portion; a first conductor electrically connecting the first signal conducting portion to the first ground conducting portion; a second conductor electrically connecting the second signal conducting portion to the first ground conducting portion; and the capacitor inserted between the first signal conducting portion and the second signal conducting portion, in series with respect to current flowing through the first signal conducting portion and the second signal conducting portion, and wherein the feeding unit comprises; a second transmission line comprising a third signal conducting portion, a fourth signal conducting portion, and a second ground conducting portion, the second ground conducting portion corresponding to the third signal conducting portion and the fourth signal conducting portion; a third conductor electrically connecting the third signal conducting portion to the second ground conducting portion; a fourth conductor electrically connecting the fourth signal conducting portion to the second ground conducting portion; a fifth conductor electrically connecting the first signal conducting portion to the third signal conducting portion; and a sixth conductor electrically connecting the second signal conducting portion to the fourth signal conducting portion, wherein, within a first region, a direction of a first magnetic field formed based on the input current is identical to a direction of a second magnetic field formed based on the induced current, and within a second region between the source resonator and the feeding unit, a direction of the first magnetic field is different from a direction of the second magnetic field. - View Dependent Claims (14, 15)
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16. A wireless power receiver comprising:
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a target resonator configured to wirelessly receive energy from a source resonator; and a feeding unit configured to generate an induced current in the same direction as a direction of an input current flowing in a transmission line of the target resonator, the feeding unit being electrically connected to a capacitor included in the target resonator and forming a closed loop with the target resonator, wherein, within a first region, a direction of a first magnetic field formed based on the input current is identical to a direction of a second magnetic field formed based on the induced current, and within a second region between the target resonator and the feeding unit, a direction of the first magnetic field is different from a direction of the second magnetic field. - View Dependent Claims (17, 18, 19)
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Specification