Patent ID: 9515493
Filing Date: 2016-12-06
CPC Classification: H01F,H02J

Claim Text:
1. A power feeding coil unit for wirelessly feeding power, comprising: a first power feeding coil and a second power feeding coil that are apposed, the first power feeding coil and the second power feeding coil generate a first magnetic flux; a first auxiliary coil on a rear side of the first power feeding coil, the first auxiliary coil generates a second magnetic flux interlinking with the first power feeding coil; and a second auxiliary coil on a rear side of the second power feeding coil, the second auxiliary coil generates a third magnetic flux interlinking with the second power feeding coil, wherein the first magnetic flux interlinks with the first power feeding coil and the second power feeding coil due to a magnetic field generated by the first power feeding coil and a magnetic field generated by the second power feeding coil, an axial direction of the first auxiliary coil is nonparallel to an axial direction of the first power feeding coil, an axial direction of the second auxiliary coil is nonparallel to an axial direction of the second power feeding coil, and a direction of circulation of the second magnetic flux and the third magnetic flux are opposite to a direction of circulation of the first magnetic flux.