APPARATUS FOR TRANSMITTING WIRELESS POWER, APPARATUS FOR RECEIVING WIRELESS POWER, SYSTEM FOR TRANSMITTING WIRELESS POWER AND METHOD FOR CONTROLING IMPEDENCE

摘要

PURPOSE: An apparatus for transmitting wireless power, an apparatus for receiving wireless power, a system for transmitting wireless power, and a method for controlling impedance are provided to improve power transmission efficiency by changing the impedance of a load terminal. CONSTITUTION: A receiver(131) receives power through a receiving resonant coil. An impedance regulator(132) changes the impedance value of a load terminal. The impedance regulator supplies the power from the receiver to the load terminal. A transmission unit(121) sends the power from a power source to the receiving resonant coil. A detection unit(122) detects the coupling coefficient value of the receiving resonant coil and a transmission resonant coil. [Reference numerals] (122) Detection unit; (132) Impedance regulator;