POWER RECEIVING DEVICE, POWER SUPPLY SYSTEM, AND METHOD FOR SUPPLYING POWER

摘要

PURPOSE: A power receiving device, a power supply system and a method for supplying power are provided to successfully supply power to the power receiving device using magnetic resonance by including a variable unit which can change the self resonant frequency of a resonance coil. CONSTITUTION: A variable unit(11) changes the self resonant frequency of a resonance coil(10). A coil(12) induces a high frequency voltage by electromagnetic induction from the resonance coil. A demodulation circuit(14) demodulates a signal from the high frequency voltage excited in the coil. A response means(15) responds to the signal demodulated by the demodulation circuit. A controller(16) controls the variable unit and the response means according to the demodulated signal.