Wireless power transmitter, wireless power relay apparatus, and wireless power receiver
First Claim
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1. A wireless power transmitter comprising:
- a source resonator configured to wirelessly transmit power via magnetic coupling with a target resonator;
a controller configured to determine a number of a plurality of switches to be turned on or off based on either one or both of a power transmission efficiency and a reflection coefficient; and
an impedance adjusting unit, comprising first and a second impedance-matching bars, configured to adjust an impedance of the source resonator using the determined number of the plurality of the switches and the first and the second impedance-matching bars,wherein;
each of the first impedance-matching bars is located symmetrically to a respective one of the second impedance-matching bars with respect to a respective one of the switches,each of the first impedance-matching bars and the respective one of the second impedance-matching bars correspond to the respective one of the switches, andeach of the first impedance-matching bars and the respective one of the second impedance-matching bars are electrically connected in response to the respective one of the switches being turned on.
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Abstract
A wireless power transmitter includes a source resonator configured to wirelessly transmit power via magnetic coupling with a target resonator; and an impedance adjusting unit configured to adjust an impedance of the source resonator using a plurality of impedance-matching bars located in the source resonator.
9 Citations
19 Claims
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1. A wireless power transmitter comprising:
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a source resonator configured to wirelessly transmit power via magnetic coupling with a target resonator; a controller configured to determine a number of a plurality of switches to be turned on or off based on either one or both of a power transmission efficiency and a reflection coefficient; and an impedance adjusting unit, comprising first and a second impedance-matching bars, configured to adjust an impedance of the source resonator using the determined number of the plurality of the switches and the first and the second impedance-matching bars, wherein; each of the first impedance-matching bars is located symmetrically to a respective one of the second impedance-matching bars with respect to a respective one of the switches, each of the first impedance-matching bars and the respective one of the second impedance-matching bars correspond to the respective one of the switches, and each of the first impedance-matching bars and the respective one of the second impedance-matching bars are electrically connected in response to the respective one of the switches being turned on. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power relay apparatus comprising:
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a relay resonator configured to perform either one or both of wireless power reception from at least one source resonator and wireless power transmission to at least one target resonator; a controller configured to determine a number of a plurality of switches to be turned on or off based on either one or both of a power transmission efficiency and a reflection coefficient; and an impedance adjusting unit, comprising first and second impedance-matching bars, configured to adjust an impedance of the relay resonator using the determined number of the plurality of the switches and the first and the second impedance-matching bars, wherein; each of the first impedance-matching bars is located symmetrically to a respective one of the second impedance-matching bars with respect to a respective one of the switches, each of the first impedance-matching bars and the respective one of the second impedance-matching bars correspond to the respective one of the switches, and each of the first impedance-matching bars and the respective one of the second impedance-matching bars are electrically connected in response to the respective one of the switches being turned on. - View Dependent Claims (13, 14, 15)
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16. A wireless power receiver comprising:
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a target resonator configured to wirelessly receive power via magnetic coupling with a source resonator; a controller configured to determine a number of a plurality of switches to be turned on or off based on either one or both of a power transmission efficiency and a reflection coefficient; and an impedance adjusting unit, comprising first and second impedance-matching bars, configured to adjust an impedance of the target resonator using the determined number of the plurality of switches and the first and second impedance-matching bars, wherein, for each of the first impedance matching bars in the target resonator, the first impedance-matching bar is located symmetrically to a respective one of the second impedance-matching bars with respect to a respective one of the switches, the first impedance-matching bar and the respective one of the second impedance-matching bars correspond to the respective one of the switches, and the first impedance-matching bar and the respective one of the second impedance-matching bars are electrically connected in response to the respective one of the switches being turned on. - View Dependent Claims (17, 18, 19)
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Specification