Wireless power transmitter
First Claim
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1. A wireless power transmitter, comprising:
- a resonator including a variable resonator, the variable resonator including a variable capacitor;
an inverter configured to operate the resonator; and
a controller configured to adjust a first capacitance of the variable resonator so that an input power to the inverter is decreased in response to a change in a level of the input power to the inverter,wherein the controller is further configured to re-adjust the first capacitance of the variable resonator based on the input power to the inverter before and after the adjustment of the first capacitance of the variable resonator, andthe controller is further configured to adjust a second capacitance of the variable capacitor in response to the change in the level of the input power to the inverter.
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Abstract
A wireless power transmitter includes a resonator including a variable resonator; an inverter configured to operate the resonator; and, a controller configured to adjust the variable resonator in response to a change in a level of power input to the inverter.
7 Citations
16 Claims
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1. A wireless power transmitter, comprising:
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a resonator including a variable resonator, the variable resonator including a variable capacitor; an inverter configured to operate the resonator; and a controller configured to adjust a first capacitance of the variable resonator so that an input power to the inverter is decreased in response to a change in a level of the input power to the inverter, wherein the controller is further configured to re-adjust the first capacitance of the variable resonator based on the input power to the inverter before and after the adjustment of the first capacitance of the variable resonator, and the controller is further configured to adjust a second capacitance of the variable capacitor in response to the change in the level of the input power to the inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transmitter, comprising:
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a power supply configured to adjust a voltage of an input power, and output an adjusted input power; a resonator including a variable resonator, the variable resonator including a variable capacitor; an inverter configured to receive the adjusted input power from the power supply and operate the resonator; a detector configured to calculate a first level of the adjusted input power received by the inverter in the wireless power transmitter; and a controller configured to adjust a capacitance of the variable capacitor in response to a change in the first level of the adjusted input power, the controller further configured to calculate power efficiency by dividing the first level of the adjusted input power received by the inverter in the wireless power transmitter by a second level of an output power received by a wireless power receiver, which is adjacent to the wireless power transmitter, and adjust a degree of the capacitance of the variable capacitor so that the power efficiency is increased. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of controlling a wireless power transmission, comprising:
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operating a power supply to provide power to a variable resonator including a variable capacitor; actuating a detector to determine an input power to or output from the power supply; and adaptively adjusting, by a controller, a resonance characteristic of the variable resonator in response to determined input power, wherein the adaptively adjusting includes re-adjusting the resonance characteristic of the variable resonator based on the determined input power before and after adaptively adjusting the resonance characteristic of the variable resonator, and the adaptively adjusting includes adjusting capacitance of the variable capacitor. - View Dependent Claims (15, 16)
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Specification