Power transmitting device, power feeding system, and power feeding method

摘要

Provided is a power transmitting device, a power feeding system, and a power feeding method in which power loss is cut by increasing power use efficiency and power can be supplied to a power feeding user (a power receiving device) with high power transmission efficiency. Depending on a power feeding state (e.g., resonant frequency of a power transmitting resonance coil is not the same as that of a power receiving resonance coil, or the influence of their positional relation), power transmitted from a power source portion of the power transmitting device is reflected to the power transmitting coil side by the power transmitting resonance coil. Further, a power recovering function (circulation function) for power reflected to the power transmitting device is provided to recover the power reflected to the power transmitting coil side and to reuse it for power transmission.

主权项

1. A power transmitting device comprising:
a plurality of adjacent power transmitting portions; and a power source portion electrically connected to the plurality of adjacent power transmitting portions, the plurality of adjacent power transmitting portions each comprising:
a power transmitting coil configured to be supplied with power from the power source portion and including a first switch;a power transmitting resonance coil which is electromagnetically coupled with the power transmitting coil by electromagnetic induction; anda directional coupler which inputs reflected power reflected from the power transmitting resonance coil to a second switch and a third switch, wherein the second switch is turned on when the inputted reflected power is smaller than reference power, wherein the third switch is turned on when the inputted reflected power is larger than the reference power, wherein the first switch is turned on when the second switch is turned on, wherein the power transmitting device is in a power transmitting state when the first switch is turned on, and wherein the power transmitting device is in a non-power transmitting state when the first switch is turned off.