| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply device, a power supply system and an electronic device for allowing transmission efficiency control corresponding to positions of devices when power transmission is performed between the devices by using a magnetic field. <P>SOLUTION: A power supply device includes a power transmission part having a power transmission coil for performing power transmission by using a magnetic field, and an auxiliary resonance part including one or a plurality of resonators. The resonators have auxiliary coils wound around so that a gap is formed in at least a part of an area. By a fact that such a gap (gap area) is formed, relation (position characteristics) between a relative position of the power supply device (power transmission side) and an electric device (power receiving side) and transmission efficiency in the power transmission changes. <P>COPYRIGHT: (C)2013,JPO&INPIT |
