Wireless power feeder, wireless power receiver, and wireless power transmission system, and coil

摘要

A wireless power feeder feeds power from a feeding coil L2 to a receiving coil L3 by wireless using a magnetic field coupling between the feeding coil L2 and the receiving coil L3. The feeding coil L2 is formed so as to be rotated. A power transmission control circuit supplies AC power to the feeding coil L2 to make the feeding coil L2 feed the AC power to the receiving coil L3. The power transmission control circuit rotates the feeding coil L2 to change the opposing area between the feeding coil L2 and the receiving coil L3 as viewed in the axis direction of the feeding coil L2 to thereby adjust the AC power to be supplied from the feeding coil L2 to the receiving coil L3.

主权项

1. A wireless power feeder that wirelessly feeds power from a feeding coil to a receiving coil using a magnetic field coupling between the feeding coil and the receiving coil, the wireless power feeder comprising:
the feeding coil formed so as to be rotated; and a power transmission control circuit that supplies AC power to the feeding coil to make the feeding coil feed the AC power to the receiving coil, wherein the power transmission control circuit is configured to rotate the feeding coil along a winding direction thereof to change an opposing area between the feeding coil and the receiving coil, thereby adjusting a mutual inductance between the feeding coil and the receiving coil, to adjust the AC power to be supplied from the feeding coil to the receiving coil, and the feeding coil is formed into a non-true circular shape.