| 摘要 |
PROBLEM TO BE SOLVED: To perform an efficient power supply while complying with radiofrequency-exposure protection guideline.SOLUTION: A power transmission apparatus (13) includes: a power transmission coil (101) that transmits power in a non-contact manner to a power receiving device (21) including a power receiving coil (201); foreign matter detection means (106) for detecting a foreign matter lying around the power transmission coil; gap change means (111) capable of changing a gap between the power transmission coil and the power receiving coil; and control means (104) for controlling the gap change means so that a magnetic flux density at a detected foreign matter location has a predetermined value or less, on the basis of an output of the foreign matter detection means.SELECTED DRAWING: Figure 18 |
