Patent ID: 8823215
Filing Date: 2014-09-02
Classification: H02J

Abstract:
1. A wireless power transmission apparatus for wirelessly transmitting power to a wireless power reception apparatus electromagnetically coupled to the wireless power reception apparatus, the wireless power transmission apparatus comprising: a power generator for generating power having a fixed oscillation frequency; a power transmission resonator, which has a resonance frequency identical to the oscillation frequency, for wirelessly transmitting the power generated by the power generator to the wireless power reception apparatus; and a power transmission resonance frequency controller configured to monitor a change of the resonance frequency of the power wirelessly transmitted from the power transmission resonator, and to control the resonance frequency of the power transmission resonator based on the change of the resonance frequency of the power transmission resonator, wherein the power transmission resonance frequency controller comprises an LC tuner, a monitoring resonator, a matching circuit for processing impedance matching of the monitoring resonator, and an LC tuner controller connected to the matching circuit, and wherein the LC tuner controller checks a power value input through the monitoring resonator and controls the LC tuner according to an LC value corresponding to a maximum power value.