| 摘要 |
PROBLEM TO BE SOLVED: To provide a power-transmitting device for transmitting power with high transmission efficiency even if a transmission distance between a power transmission resonance coil and a power receiving resonance coil is changed, and to provide a power-receiving device and a power transmission system. SOLUTION: In the power-transmitting device 24, a position of the center of gravity O2 of a power transmission pickup coil 23 is adjusted, thus changing a state of magnetic flux passing through the inside of an outer enclosure of the power transmission pickup coil 23 in magnetic flux generated by the power transmission resonance coil 22, and hence increasing or decreasing a boosting ratio of the power transmission resonance coil 22 to the power transmission pickup coil 23 to adjust an impedance ratio of the power-transmitting device 24. In the power-transmitting device 24, the impedance of the power transmission pickup coil 23 seen from the power transmission resonance coil 22 is adjusted by changing the state (interlinkage state) of the magnetic flux passing through the inside of the outer enclosure of the power transmission pickup coil 23, thus maintaining high transmission efficiency η. COPYRIGHT: (C)2011,JPO&INPIT |
