WIRELESS POWER SUPPLY SYSTEM, WIRELESS POWER TRANSMISSION DEVICE, AND WIRELESS POWER RECEIVING DEVICE

摘要

Provided is a wireless power transmission device (1) of a wireless power supply system, which is provided with a wireless power transmission section (10) including a variable resonant circuit (100) having a variable-controllable resonant frequency characteristic and transmitting power without wires through the variable resonant circuit (100). Resonant frequencies (f1 to f3) of the variable resonant circuit (100) are variable-controlled by a power transmission control unit (13). In wireless power receiving devices (2A to 2C), wireless power receiving sections (20) including different unique resonant circuits (200A to 200C) from one another are provided, respectively. The wireless power receiving sections (20) receive the power from the wireless power transmission section (10) without wires resulting from that the unique resonant circuits (200A to 200C) are tuned to the resonant frequencies (f1 to f3) of the variable resonant circuit (100) to generate a magnetic field resonance mode.