Patent ID: 9728325
Date: 2017-08-08
CPC Classifications: B60L,H01F,H02J,Y02T

Claim:
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 completely 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 the at least one pair of auxiliary coils does not overlap the region defined by the wire of the power feeding coil when viewed from the axial direction of the power feeding coil, 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.