Method and apparatus for detecting efficiency of wireless power transmission
First Claim
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1. A method of detecting an efficiency of a wireless power transmission from a source device to a target device, the method comprising:
- receiving, from the target device, information about power used by the target device;
determining a first power of a power amplifier (PA) of the source device based on the information about the power used by the target device;
transmitting, to the target device, wireless power corresponding to the first power;
determining a second power of the PA in response to a current of the PA converging to a constant level, wherein the current of the PA is changed until the target device receives wireless power corresponding to the information about the power used by the target device; and
calculating the efficiency of the wireless power transmission based on the second power and the information about power used by the target device.
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Abstract
Provided are a method and apparatus for detecting an efficiency of a wireless power transmission. An output power of a source device may be adjusted based on current that is flowing in a power converter of the source device. The efficiency of wireless power transmission may be calculated based on the adjusted output power, and an amount of power used by a target device.
19 Citations
15 Claims
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1. A method of detecting an efficiency of a wireless power transmission from a source device to a target device, the method comprising:
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receiving, from the target device, information about power used by the target device; determining a first power of a power amplifier (PA) of the source device based on the information about the power used by the target device; transmitting, to the target device, wireless power corresponding to the first power; determining a second power of the PA in response to a current of the PA converging to a constant level, wherein the current of the PA is changed until the target device receives wireless power corresponding to the information about the power used by the target device; and calculating the efficiency of the wireless power transmission based on the second power and the information about power used by the target device. - View Dependent Claims (2, 3, 4)
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5. A method of detecting an efficiency of a wireless power transmission from a source device to a target device, the method comprising:
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receiving, from the target device, information about power used by the target device; determining an output power of a power amplifier (PA) of the source device based on the information about power used by a target device; transmitting, to the target device, wireless power corresponding to the output power; receiving, from the target device, information about power that is received by the target device, wherein the information about the power that is received by the target device comprises information about a current flowing in a load modulator of the target device, in a state in which a connection to a load of the target device is blocked and the received power inputted to the load modulator of the target device; and calculating the efficiency of the wireless power transmission, based on the information about the power that is received by the target device and the output power. - View Dependent Claims (6)
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7. A computer-readable storage medium having stored therein program instructions to cause a processor to execute a method of detecting an efficiency of a wireless power transmission from a source device to a target device, the method comprising:
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receiving, from the target device, information about power used by the target device; determining a first output power of a power amplifier (PA) of the source device based on the information about power used by the target device; transmitting, to the target device, wireless power corresponding to the first power; determining a second power of the PA in response to a current of the PA converging to a constant level, wherein the current of the PA is changed until the target device receives wireless power corresponding the information about the power used by the target device; and calculating the efficiency of the wireless power transmission, based on the second power and the information about the power used by the target device.
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8. A wireless power transmitter, comprising:
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a controller to determine a first power of a power amplifier (PA) of the wireless power transmitter based on information about power used by a target device received from the target device; and a resonator to transmit, to the target device, wireless power corresponding to the first power, wherein the controller determines a second power of the PA in response to a current of the PA converging to a constant level, wherein the current of the PA is changed until the target device receives wireless power corresponding the information about the power used by the target device, and calculates an efficiency of a wireless power transmission, based on the second power and the information about power used by the target device. - View Dependent Claims (9, 10, 11, 12)
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13. A wireless power transmitter, comprising:
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a controller to determine an output power of a power amplifier (PA) of the wireless power transmitter based on information about power used by a target device; and a resonator to transmit, to the target device, wireless power corresponding to the output power, wherein the controller receives, from the target device, information about power that is received by the target device, wherein the information about the power that is received by the target device comprises information about a current flowing in a load modulator of the target device, in a state in which a connection to a load of the target device is blocked and the received power inputted to the load modulator of the target device, and calculates an efficiency of a wireless power transmission, based on the information about the power that is received by the target device and the output power. - View Dependent Claims (14, 15)
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Specification