Patent ID: 9048683
Filing Date: 2015-06-02
Classification: H02J

Abstract:
1. A wireless charging apparatus for controlling charging power, in charging a target to be charged, the apparatus comprising: a Voltage Control Oscillator (VCO) for outputting a resonant frequency corresponding to a first power transmission control value; a wireless power transmitter for outputting power determined by the resonant frequency to the target to be charged; a first resonator connected to the wireless power transmitter for outputting a first power value at a lower-limit frequency of a predetermined frequency band; a second resonator connected to the wireless power transmitter for outputting a second power value at an upper-limit frequency of the predetermined frequency band; and a controller for adjusting the first power transmission control value for adjusting the resonant frequency if either the first power value or the second power value from the first and second resonators exceeds a power limit.