POWER FEEDING COIL UNIT AND WIRELESS POWER TRANSMISSION DEVICE

摘要

A power feeding coil unit includes a power feeding coil, and first and second auxiliary coils located outside of the region defined by a wire of the power feeding coil. The axis of the first auxiliary coil and the axis of the second auxiliary coil are substantially perpendicular to the axis of the power feeding coil. The power feeding coil and the first and second auxiliary coils simultaneously generate respective magnetic fluxes, each of which interlinks the corresponding one of the power feeding coil and the first and second auxiliary coils in a direction from the center to the outside of the power feeding coil unit.

主权项

1. A power feeding coil unit for wirelessly feeding power, comprising:
a power feeding coil having a wire wound in a planar shape; and at least one pair of auxiliary coils, each pair including a first auxiliary coil and a second auxiliary coil, the at least one pair of auxiliary coils being located on a rear side of the power feeding coil and located outside of the region defined by the wire of the power feeding coil when viewed from an axial direction of the power feeding coil, wherein an axis of the first auxiliary coil and an axis of the second auxiliary coil are nonparallel to an axis of the power feeding coil, and the power feeding coil, the first auxiliary coil, and the second auxiliary coil simultaneously generate respective magnetic fluxes, each of which interlinks the corresponding one of the power feeding coil, the first auxiliary coil, and the second auxiliary coil in a direction from a center to an outside of the power feeding coil unit.