System for wireless power transmission and reception

A wireless power transmitter comprising:

• a communication unit configured to receive information associated with whether a current value, a voltage value, or both detected by a wireless power receiver has a peak value;
• a controller configured to track a requested power of a load, based on the information;
• and
• a transmitting unit configured to transmit, to a target resonator, a wireless power corresponding to the requested power, between a source resonator and the target resonator.

A method of receiving a wireless power, the method comprising:

• receiving, from a source resonator, wireless power;
• detecting a current value, a voltage value, or both of the wireless power;
• determining whether the detected current value, the detected voltage value, or both have a peak value, in a relation to a load which the wireless power is to be transmitted to;
• and
• transmitting a result of the determination to the source resonator.

A method of transmitting a wireless power, the method comprising:

• receiving information associated with whether a current value, a voltage value, or both detected by a wireless power receiver has a peak value;
• tracking a requested power of a load, based on the information;
• and
• transmitting, to a target resonator of the wireless power receiver, a wireless power corresponding to the requested power.