Patent ID: 9711968
Date: 2017-07-18
CPC Classifications: H02J,H04B

Claim:
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.