RADIO ENERGY TRANSMISSION DEVICE AND RADIO ENERGY TRANSMISSION METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a radio energy transmission device for preventing energy transmitted by radio form being stolen. PSOLUTION: The radio energy transmission device includes: a power transmission section 2 for generating a vibration magnetic field; a power reception section 3 for receiving the vibration magnetic field of the power transmission section 2 by a power reception antenna 31 and converting the vibration magnetic field into power; a frequency control section 23 for changing the frequency of the vibration magnetic field generated by the power transmission section 2; and a resonant frequency changing section 33 for changing the resonant frequency of the power reception antenna 31 in response to the change in the frequency of the vibration magnetic field. The change in frequency of the vibration magnetic field generated in the power transmission section 2 makes it difficult to efficiently receive power even if someone tries to steal the power being transmitted, and thus the power is prevented from being stolen. Further, the change in resonant frequency of the power reception antenna 31 in response to the change in the frequency of the vibration magnetic field enables to highly efficiently receive power even if the frequency of the transmitted vibration magnetic field changes, and energy is properly transmitted. PCOPYRIGHT: (C)2010,JPO&INPIT