| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a resonance type wireless power transmission device that can transmit transmission data from a power reception side to a power transmission side even when a power supply frequency of the power transmission side is different from a resonance frequency, and can adjust the power supply frequency of the power transmission side to a frequency corresponding to the resonance frequency by a notification from the power reception side. <P>SOLUTION: A power reception side device 20 has means of changing a load impedance within a predetermined range by on-off controlling a switch, and a controller 26 that on-off controls the switch with associating transmission data to be transmitted from the power reception side device 20 to a power transmission side device with the change of the load impedance. The power transmission side device 10 has a demodulator 12 that detects a transient response of a current or a voltage generated depending on the change of the load impedance corresponding to the transmission data to extract the transmission data by the transient response. <P>COPYRIGHT: (C)2012,JPO&INPIT |
