Wireless power transmission apparatus and wireless power transmission method
First Claim
Patent Images
1. A wireless power transmission apparatus comprising:
- a source resonator to transmit resonance power to a target resonator;
a coupling unit to couple a reflected signal with respect to the transmitted resonance power;
a resonance point detecting unit to scan a frequency band of the reflected signal, verify an amplitude of the reflected signal corresponding to the frequency band, and determine a coupling frequency based on the amplitude, wherein the source resonator and the target resonator are coupled at the coupling frequency;
a control unit configured to calculate a frequency deviation between a resonance frequency of the source resonator and the coupling frequency, and calculate an impedance deviation corresponding to the frequency deviation; and
an impedance control unit to adjust the impedance of the source resonator based on the impedance deviation,wherein the impedance of the source resonator is adjusted by changing a distance between a conducting portion of the source resonator and a conductor of a matcher being electrically connected with the source resonator.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a wireless power transmission apparatus and method. The wireless power transmission apparatus may include a coupling unit to couple a reflected signal with respect to a transmitted resonance power, and a resonance point detecting unit to scan a frequency of the reflected signal to detect a resonance point. A resonance frequency of the source resonator may be controlled using the detected resonance point.
14 Citations
12 Claims
-
1. A wireless power transmission apparatus comprising:
-
a source resonator to transmit resonance power to a target resonator; a coupling unit to couple a reflected signal with respect to the transmitted resonance power; a resonance point detecting unit to scan a frequency band of the reflected signal, verify an amplitude of the reflected signal corresponding to the frequency band, and determine a coupling frequency based on the amplitude, wherein the source resonator and the target resonator are coupled at the coupling frequency; a control unit configured to calculate a frequency deviation between a resonance frequency of the source resonator and the coupling frequency, and calculate an impedance deviation corresponding to the frequency deviation; and an impedance control unit to adjust the impedance of the source resonator based on the impedance deviation, wherein the impedance of the source resonator is adjusted by changing a distance between a conducting portion of the source resonator and a conductor of a matcher being electrically connected with the source resonator. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A wireless power transmission method comprising:
-
performing frequency scanning with respect to a reflected signal of a transmitted resonance power; determining a coupling frequency based on an amplitude of the reflected signal, wherein a source resonator and a target resonator are coupled at the coupling frequency; calculating a frequency deviation between a resonance frequency and the coupling frequency; calculating an impedance deviation corresponding to the frequency deviation; and adjusting the impedance of the source resonator based on the impedance deviation, wherein the impedance of the source resonator is adjusted by changing a distance between a conducting portion of the source resonator and a conductor of a matcher being electrically connected with the source resonator. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A wireless power receiving device comprising:
-
a target resonator configured to receive power wirelessly from a source resonator; and a load configured to consume the wireless power received from the source resonator, wherein the wireless power receiving device reflects a portion of the wireless power received from the source resonator, and the target resonator is further configured to receive wireless power from the source resonator that has a change in impedance based on an impedance set value for a maximal power transmission and an impedance deviation corresponding to a frequency deviation between a resonance frequency and coupling frequency, wherein a source resonator and a target resonator are coupled at the coupling frequency, wherein the coupling frequency is determined based on an amplitude of the reflected signal corresponding to a frequency band of the reflected signal, wherein the impedance of the source resonator is adjusted by changing a distance between a conducting portion of the source resonator and a conductor of a matcher being electrically connected with the source resonator. - View Dependent Claims (12)
-
Specification