Patent ID: 7804272

Claim:
A noncontact type power feeder system comprising a power feeding portion provided along a track way for a mobile object, and a power receiving portion provided in the mobile object, the power feeding portion being opposed face-to-face to the power receiving portion so as to feed a power thereto characterized in that: each of the power feeding portion and the power receiving portion is formed of windings formed in an oval shape, and a magnetic planar core formed in its surface with a recess for accommodating therein the windings; the planar core is formed of an assembly of planer blocks each having a rectangular surface, the assembly of planar blocks comprises thin wall parts in which several planar blocks are laid in one and the same plane with their long sides being made into contact with one another, and thick wall parts in which several planer blocks are superposed one upon another, the recess of the planar core is defined by the thick wall parts in which planar blocks are superposed on the surface of the planar core outside and inside of the oval shape part of the windings, the longitudinal direction of the oval shape of the windings and the long sides of the planar blocks are directed in a travel direction of a mobile object when the power feeding portion and the power receiving portion are opposed face-to-face to each other.