| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless power supply system, a power transmission device, and a power transmission method, capable of maintaining an optimal transmission efficiency by allowing the transmission device only to improve the deterioration of transmission efficiency caused by transmission distance fluctuation between transmission and reception devices.SOLUTION: A wireless power supply system 100 includes: a power transmission device 110; and a power reception device 130. The power transmission device 110 includes: a high frequency power source 111 serving as a power generation section for generating electric power; a power transmission unit 113 for transmitting the generated power to the power reception device 130; a reflection power detection unit 112 for detecting a reflection power value acquired by the power transmission unit 113; and a control unit 115 for changing a resonance frequency of the electric power transmitted from the power transmission unit 113 corresponding to the detected reflection power value. |
