APPARATUS AND METHOD FOR TRANSMITTING WIRELESS POWER BY USING RESONANT COUPLING AND SYSTEM FOR THE SAME
First Claim
1. An apparatus for transmitting wireless power of a transmitter using a resonant coupling, the apparatus comprising:
- a transmission power converter which converts Direct Current (DC) power to Alternating Current (AC) power;
a controller which adjusts a Q factor of a transmission resonator by using a frequency of the converted AC power and a resonant frequency of the transmission resonator and controls adaptive impedance matching; and
a transmission resonator which wirelessly transmits the converted AC power to a receiver through the adjusted Q factor and the controlled adaptive impedance matching, the transmission resonator having a coil installed in the transmitter.
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Accused Products
Abstract
Disclosed are an apparatus and a method for charging power using a resonant coupling. The apparatus includes a transmission power converter for converting Direct Current (DC) power to Alternating Current (AC) power, a controller for adjusting a Q factor of a transmission resonator by using a frequency of the converted AC power and a resonant frequency of the transmission resonator and controlling adaptive impedance matching, and a transmission resonator for wirelessly transmitting the converted AC power to a receiver through the adjusted Q factor and the controlled adaptive impedance matching, the transmission resonator having a coil installed in the transmitter.
69 Citations
34 Claims
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1. An apparatus for transmitting wireless power of a transmitter using a resonant coupling, the apparatus comprising:
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a transmission power converter which converts Direct Current (DC) power to Alternating Current (AC) power; a controller which adjusts a Q factor of a transmission resonator by using a frequency of the converted AC power and a resonant frequency of the transmission resonator and controls adaptive impedance matching; and a transmission resonator which wirelessly transmits the converted AC power to a receiver through the adjusted Q factor and the controlled adaptive impedance matching, the transmission resonator having a coil installed in the transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of transmitting wireless power of a transmitter using a resonant coupling, the method comprising:
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converting Direct Current (DC) power to Alternating Current (AC) power; adjusting a Q factor of a transmission resonator by using a frequency of the converted AC power and a resonant frequency of the transmission resonator and controlling adaptive impedance matching; and wirelessly transmitting the converted AC power to a receiver through the adjusted Q factor and the controlled adaptive impedance matching, wherein a coil is installed in the transmitter. - View Dependent Claims (10, 11, 12, 13)
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14. A system for charging wireless power using a resonant coupling, the system comprising:
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a transmitter which converts Direct Current (DC) power to Alternating Current (AC) power, matches a frequency of the converted AC power with a resonant frequency of a transmission resonator, and transmits the converted AC power to a receiver, a coil being installed in the transmitter; and a receiver which converts the received AC power to DC power to charge a battery. - View Dependent Claims (15, 16, 17, 18)
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19. A wireless power transmitter for transmitting wireless power to one or more wireless power receivers, the wireless power transmitter comprising:
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a power provider which provides Direct Current (DC) wireless power having a preset voltage or current value; a power converter which converts the wireless power received from the power provider to Alternating Current (AC) power for a resonance; and a resonator which transmits the converted power to the one or more wireless power receivers by using the resonance and transmits the wireless power with a substantially equal efficiency irrespective of a change in arrangement positions, arrangement directions, and a number of the one or more wireless power receivers, due to a loose coupling with each of the one or more wireless power receivers. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A wireless power receiver for receiving wireless power from a wireless power transmitter comprising a power transmission resonator, the wireless power receiver comprising:
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a resonator which resonates with the power transmission resonator to receive the wireless power; a rectifier which rectifies the received wireless power from an Alternating Current (AC) type waveform to a Direct Current (DC) type waveform; a regulator which regulates the rectified wireless power to be output with a constant efficiency; and a battery which stores the regulated wireless power, wherein the resonator is loosely coupled with the power transmission resonator and the resonator receives the wireless power with a substantially equal efficiency irrespective of a change in one or more of an arrangement position and an arrangement direction of the wireless power receiver. - View Dependent Claims (31, 32, 33, 34)
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Specification