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US 9,143,041 B2Granted
Magnetic circuit, power-supplying device and power-receiving device for non-contact charging apparatus, and non-contact charging apparatus
AssigneeHitachi Metals, Ltd.
InventorsHiromitsu Itabashi, Yoshiyuki Moriyama
Life of this patent
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Abstract
A magnetic circuit for a non-contact charging apparatus comprising a coil, a coil yoke disposed on the rear surface side of the coil, and a magnetic attraction means disposed in a hole of the coil yoke with a magnetic gap in plane and/or thickness directions.
Claims10
A magnetic circuit for a non-contact charging apparatus, comprising:
- a coil;
- a coil yoke disposed on the rear surface side of said coil;
- and
- a magnetic attraction member,
- wherein at least a part of said magnetic attraction member is disposed in a hole of said coil yoke when viewed in a plane direction, and
- wherein a magnetic gap is interposed between the magnetic attraction member and the coil yoke in at least one of the plane direction and a thickness direction,
- wherein a width of the magnetic gap is in a range such that magnetic saturation near the coil yoke is prevented to suppress decrease in permeability, thereby suppressing reduction of power transmission efficiency, and further the coil is not substantially influenced by magnetic flux generated from the magnetic attraction member.
4 more elements
Dependencies are inferred from the claim text.