Wireless power transmission system
First Claim
Patent Images
1. A wireless power transmission device, comprising:
- a power charger configured to receive power from a power supply device;
a transmitter comprising a source resonator;
a controller configured to control an electrical connection between the power charger and the transmitter to charge the source resonator with power by applying current to an inductor of the source resonator and to transmit the charged power to a target resonator through a mutual resonance;
a measuring unit configured to measure a voltage applied to a capacitor of the source resonator; and
a detector configured to detect an envelope of the voltage based on the measured voltage,wherein the controller is further configured to;
open an electrical connection between the power supply device and the source resonator to prevent current from being provided to the source resonator from the power supply device upon the source resonator being charged with a value of power while the source resonator is transmitting power to the target resonator through mutual resonance,turn on a switch that electrically connects the power charger and the transmitter to charge the source resonator with power, andturn off the switch that electrically connects the power charger and the transmitter to transmit power the source resonator is charged with.
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Accused Products
Abstract
Provided is a device and method for wirelessly transmitting power, and a wireless power transmission device that may control an electrical connection between a power charger and a transmitter to charge a source resonator with power and transmit the charged power to a target resonator through mutual resonance.
9 Citations
23 Claims
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1. A wireless power transmission device, comprising:
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a power charger configured to receive power from a power supply device; a transmitter comprising a source resonator; a controller configured to control an electrical connection between the power charger and the transmitter to charge the source resonator with power by applying current to an inductor of the source resonator and to transmit the charged power to a target resonator through a mutual resonance; a measuring unit configured to measure a voltage applied to a capacitor of the source resonator; and a detector configured to detect an envelope of the voltage based on the measured voltage, wherein the controller is further configured to; open an electrical connection between the power supply device and the source resonator to prevent current from being provided to the source resonator from the power supply device upon the source resonator being charged with a value of power while the source resonator is transmitting power to the target resonator through mutual resonance, turn on a switch that electrically connects the power charger and the transmitter to charge the source resonator with power, and turn off the switch that electrically connects the power charger and the transmitter to transmit power the source resonator is charged with. - View Dependent Claims (2, 3, 4, 5, 6, 23)
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7. A wireless power reception device, comprising:
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a charger comprising a target resonator; a power output unit configured to transfer power to a load; a controller configured to open an electrical connection between the charger and the power output unit to charge the target resonator with power through mutual resonance with a source resonator, and to deliver the charged power to the load; a measuring unit configured to measure a voltage applied to a capacitor of the target resonator; and a detector configured to detect an envelope of the voltage based on the measured voltage, wherein the controller is further configured to; control an electrical connection between the target resonator and the load to prevent power from being delivered to the load from the target resonator upon the target resonator being charged with a value of power while charging the target resonator through mutual resonance with the source resonator, turn off a switch that electrically connects the charger and the power output unit while charging the target resonator with power, and turn on the switch that electrically connects the charger and the power output unit to deliver, to the load, power that the target resonator is charged with. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of transmitting wireless power, the method comprising:
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charging a source resonator with power provided from a power supply device by applying current to an inductor of the source resonator; controlling an electrical connection between the power supply device and the source resonator; transmitting, to a target resonator, the charged power through mutual resonance; measuring a voltage applied to a capacitor of the source resonator; and detecting an envelope of the voltage based on the measured voltage, wherein the controlling comprises; opening an electrical connection between the power supply device and the source resonator to prevent current from being provided to the source resonator from the power supply device upon the source resonator being charged with a value of power while the source resonator is transmitting power to the target resonator through mutual resonance; turning on a switch that electrically connects the power charger and the transmitter to charge the source resonator with power, and turning off the switch that electrically connects the power charger and the transmitter to transmit power the source resonator is charged with. - View Dependent Claims (15, 16)
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17. A method of receiving wireless power, the method comprising:
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charging a target resonator with power that a source resonator is charged with, through mutual resonance between a source resonator and the target resonator; delivering, to a load, the power that the target resonator is charged with; measuring a voltage applied to a capacitor of the target resonator; and detecting an envelope of the voltage based on the measured voltage, wherein the charging comprises; opening an electrical connection between the target resonator and the load to prevent power from being delivered to the load from the target resonator upon the target resonator being charged with a value of power while charging the target resonator through mutual resonance with the source resonator, turning off a switch that electrically connects the charger and the power output unit while charging the target resonator with power, and turning on the switch that electrically connects the charger and the power output unit to deliver, to the load, power that the target resonator is charged with. - View Dependent Claims (18, 19, 20, 21)
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22. A wireless power transmission device, comprising:
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a power charger configured to receive power from a power supply device; a transmitter comprising a source resonator; and a controller configured to control an electrical connection between the power charger and the transmitter to charge the source resonator with power by applying current to an inductor of the source resonator and to transmit the charged power to a target resonator through a mutual resonance; a measuring unit configured to measure a voltage applied to a capacitor of the source resonator; and a detector configured to detect an envelope of the voltage based on the measured voltage, wherein the controller is configured to; open the electrical connection between the power charger and the transmitter based on an amount of power with which the source resonator is charged, turn on a switch that electrically connects the power charger and the transmitter to charge the source resonator with power, and turn off the switch that electrically connects the power charger and the transmitter to transmit power the source resonator is charged with.
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Specification