WIRELESS POWER TRANSMITTER, WIRELESS POWER RECEIVER, AND METHOD FOR WIRELESS POWER TRANSFER USING THEM

摘要

PURPOSE: A wireless power transmitter, a wireless power receiver, and a wireless power transmission method using the same are provided to determine an optimized transmission frequency according to a received power value, thereby improving transmission efficiency. CONSTITUTION: A wireless power transmitter(100) modulates a transmission frequency according to a predetermined value. The wireless power transmitter transmits a high frequency signal according to the modulated transmission frequency to one or more wireless power receivers(210). The wireless power receiver re-determines the predetermined value according to information corresponding to a power value of the received high frequency signal. The transmission frequency is modulated within a range of 10 percent of an independent resonant frequency. The information with respect to the power value is created from the wireless power receivers.