WIRELESS POWER TRANSMITTER AND WIRELESS POWER RECEIVER

摘要

PROBLEM TO BE SOLVED: To perform change of a variable resonance frequency of a coil in a fine grain size.SOLUTION: A wireless power transmitter comprises a power feeding point and a first variable impedance element which is electrically connected to the power feeding point. An initial value of the first variable impedance element is set so as to be capable of being adjusted in both the increasing direction and decreasing direction.