Device and method for supporting improved communication speed in wireless power transmission system

A wireless power transmitter transmitting data and wireless power, comprising:

• a power conversion unit that generates the wireless power at an operating frequency and transmits the generated wireless power to a wireless power receiver based on magnetic coupling;
• and
• a communication/control unit that sets the number n of cycles per bit used to transmit one bit at the operating frequency, aligns each bit of the data to n cycles, and transitions the operating frequency between differential bi-phases depending on values of each bit for the n cycles.

A wireless power receiver receiving data and wireless power, comprising:

• a power pick-up unit that receives the wireless power from a wireless power transmitter at an operating frequency;
• and
• a communication/control unit that detects n cycles aligning each bit at the operating frequency based on the number n of cycles per bit negotiated with the wireless power transmitter in advance, detects a transition phase of the operating frequency for the n cycles, and decodes data received from the wireless power transmitter based on the transition phase of the operating frequency.