Wireless power transmission method and apparatus for improving spectrum efficiency and space efficiency based on impedance matching and relay resonance
First Claim
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1. A wireless power transmitting apparatus, the apparatus comprising:
- an input impedance detector to detect an input impedance of a transmitting resonator connected to the wireless power transmitting apparatus at a resonant frequency;
a control signal output unit to output a control signal to control a transmitting port impedance based on the input impedance;
a transmitting port impedance converter to convert the transmitting port impedance to match a real number value of the input impedance at the resonant frequency based on the control signal without a matching of a receiving port impedance; and
a power transmitter to transmit power to a wireless power receiving apparatus through the transmitting resonator at the resonant frequency based on the converted transmitting port impedance,wherein the input impedance is determined based on a distance between the transmitting resonator and a receiving resonator connected to the wireless power receiving apparatus,wherein the transmitting port impedance is converted by adjusting a distance between the transmitting resonator and a feeding coil used to provide power to the transmitting resonator.
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Abstract
Provided is a wireless power transmission method and apparatus for improving spectrum efficiency and space efficiency based on impedance matching and relay resonance, the method including detecting an input impedance at a resonant frequency, matching a transmitting port impedance to a real number value of the detected input impedance, and transmitting power to a receiving resonator smaller than a transmitting resonator using the relay resonator.
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Citations
12 Claims
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1. A wireless power transmitting apparatus, the apparatus comprising:
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an input impedance detector to detect an input impedance of a transmitting resonator connected to the wireless power transmitting apparatus at a resonant frequency; a control signal output unit to output a control signal to control a transmitting port impedance based on the input impedance; a transmitting port impedance converter to convert the transmitting port impedance to match a real number value of the input impedance at the resonant frequency based on the control signal without a matching of a receiving port impedance; and a power transmitter to transmit power to a wireless power receiving apparatus through the transmitting resonator at the resonant frequency based on the converted transmitting port impedance, wherein the input impedance is determined based on a distance between the transmitting resonator and a receiving resonator connected to the wireless power receiving apparatus, wherein the transmitting port impedance is converted by adjusting a distance between the transmitting resonator and a feeding coil used to provide power to the transmitting resonator. - View Dependent Claims (2, 3, 4, 5)
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6. A wireless power receiving apparatus, the apparatus comprising:
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a power receiver to receive power from a transmitting resonator connected to a wireless power transmitting apparatus at a resonant frequency; and a load unit consuming the received power, wherein the wireless power transmitting apparatus converts a transmitting port impedance to match a real number value of an input impedance of the transmitting resonator detected at the resonant frequency without a matching of a receiving port impedance and transmits power through the transmitting resonator, wherein the input impedance is determined based on a distance between the transmitting resonator and a receiving resonator connected to the wireless power receiving apparatus, and wherein the transmitting port impedance is converted by adjusting a distance between the transmitting resonator and a feeding coil used to provide power to the transmitting resonator. - View Dependent Claims (7)
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8. A wireless power transfer apparatus, the apparatus comprising:
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a transmitting resonator to transmit power generated from a wireless power transmitting apparatus to a receiving resonator at a resonant frequency; and the receiving resonator to receive the power from the transmitting resonator using a relay resonator, wherein a size of the receiving resonator is smaller than a size of the transmitting resonator, wherein the relay resonator controls a receiving efficiency of the receiving resonator by adjusting a distance from the receiving resonator, wherein the wireless power transmitting apparatus converts a transmitting port impedance to match a real number value of an input impedance of the transmitting resonator detected at the resonant frequency without a matching of a receiving port impedance and generates power, wherein the input impedance is determined based on a distance between the transmitting resonator and a receiving resonator connected to a wireless power receiving apparatus, and wherein the transmitting port impedance is converted by adjusting a distance between the transmitting resonator and a feeding coil used to provide power to the transmitting resonator. - View Dependent Claims (9, 10)
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11. A wireless power transmitting method, the method comprising:
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detecting an input impedance of a transmitting resonator connected to a wireless power transmitting apparatus at a resonant frequency; outputting a control signal to adjust a transmitting port impedance based on the input impedance; converting the transmitting port impedance to match a real number value of the input impedance at the resonant frequency based on the control signal without a matching of a receiving port impedance; and transmitting power to a wireless power receiving apparatus through the transmitting resonator at the resonant frequency based on the converted transmitting port impedance, wherein the input impedance is determined based on a distance between the transmitting resonator and a receiving resonator connected to the wireless power receiving apparatus, and wherein the transmitting port impedance is converted by adjusting a distance between the transmitting resonator and a feeding coil used to provide power to the transmitting resonator. - View Dependent Claims (12)
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Specification