Power transmission system transmitting powers from multiple power transmitter apparatuses to multiple power receiver apparatuses, and capable of distinguishing and separating transmitted powers

A power transmission system, comprising a plurality of power transmitter apparatuses, a plurality of power receiver apparatuses, and a controller, the power transmission system transmitting powers from the plurality of power transmitter apparatuses to the plurality of power receiver apparatuses via a transmission path,

• wherein each of the plurality of power transmitter apparatuses comprises a code modulator that modulates first power to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmits the code-modulated wave to one of the plurality of power receiver apparatuses via the transmission path;
• wherein each of the plurality of power receiver apparatuses comprises a code demodulator that receives the code-modulated wave from one of the plurality of power transmitter apparatuses via the transmission path, and demodulates the received code-modulated wave to generate second power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation;
• and
• wherein, when power is transmitted between each of a plurality of transmitter and receiver pairs, each of the transmitter and receiver pairs including one of the plurality of power transmitter apparatuses and one of the plurality of power receiver apparatuses, the controller selects and assigns a plurality of code sequences to the plurality of transmitter and receiver pairs, respectively, so as to reduce an average of an absolute value of a total current of the code-modulated waves of the plurality of transmitter and receiver pairs in the transmission path, as compared to a predetermined reference value, the average being averaged over a predetermined time.