| 摘要 |
A wireless power supply device comprises: a measured value acquiring means (20) for acquiring the measured values of voltage and current flowing through a power transmitting device (10); a calculation means (101) for storing a power supply circuit theoretical equation including a coupling coefficient (kappa) between a power transmitting coil (L1) of the power transmitting device and a power receiving coil (L2) paired with the power transmitting coil and calculating, from the measured value of one of voltage and current acquired by the measured value acquiring means and the power supply circuit theoretical equation, the theoretical value of the other one of voltage and current flowing through the power transmitting device; and a coil coupling state estimation means (100) for searching for the coupling coefficient in the power supply circuit theoretical equation so that the error between the measured value of the other one of voltage and current and the theoretical value of the other one of voltage and current becomes the minimum and estimating, based on the searched coupling coefficient, the coupling state between the power transmitting coil and the power receiving coil. |
