WIRELESS POWER-TRANSMISSION APPARATUS AND SYSTEM

According to the present invention, a wireless power-transmission apparatus comprises: a wireless power-transmission unit which wirelessly transmits power to at least one wireless power-receiving unit through a magnetic-resonance coupling system; and a master wireless power-receiving unit which is connected to the wireless power-transmission unit in a wired manner so as to perform communication, and which performs peer-to-peer wireless communication with said at least one wireless power-receiving unit. The frequency of resonance used in the peer-to-peer wireless communication between the master wireless power-receiving unit and said at least one wireless power-receiving unit is the same as the frequency of resonance used in the wireless power transmission between the wireless power-transmission unit and said at least one wireless power-receiving unit.