| 摘要 |
A non-contact power supply system is provided with: a power transmission device (10) that comprises a power transmission coil (14); and a power reception device (40) that comprises a power reception coil (41). Power is transmitted in a non-contact manner from the power transmission coil (14) to the power reception coil (41), and power is supplied to a battery (44) that is mounted to the power reception device (40). The power transmission device (10) is provided with: a power factor calculation unit (31) that calculates a power factor (cosθ) from the phase difference between the voltage and the current that are supplied to the power transmission coil (14); and a control amount calculation unit (29) that controls the power that is supplied to the power transmission coil (14) on the basis of a power command value (Pbat*) and executes control for limiting the power that is supplied to the power transmission coil (14) when the power factor is equal to or less than a preset threshold power factor. As a result, it is possible to immediately limit transmitted power when the power reception coil (41) is misaligned with respect to the power transmission coil (14). |
