Wireless power transmission system, and method for controlling wireless power transmission and wireless power reception

A wireless power transmitter comprising:

• a detector configured to detect a plurality of target devices used to wirelessly receive power;
• a controller configured to select a source resonating unit from among a plurality of source resonating units, based on the amount of power to be transmitted to one or more of the plurality of target devices, a coupling factor associated with one or more of the plurality of target devices, or both;
• and
• a power transmitting unit configured to wirelessly transmit power to a target device using the selected source resonating unit.

A wireless power receiver comprising:

• a communication unit configured to transmit, to a wireless power transmitter, information on an identifier (ID) of the wireless power receiver, information on the amount of power to be used in the wireless power receiver, or both;
• a power receiving unit configured to wirelessly receive power from a source resonating unit, to wirelessly receive power from a target resonator of another wireless power receiver, or both;
• and
• a controller configured to disconnect a load when power reception is terminated.