Power transmission coil

• US 20080122570A1
• Filed: 11/29/2007
• Published: 05/29/2008
• Est. Priority Date: 11/29/2006
• Status: Abandoned Application

• Current Assignee: Aska Electron Co., Ltd., Yonezawa Electric Wire Company Limited (Fujikura Limited)
• Original Assignee: Aska Electron Co., Ltd.
• Inventors: Takaishi, Konomu
• Application Number:
  US11/987,304
• Publication Number:
  US 20080122570A1
• Time in Patent Office: Days
• US Class Current: 336/84M
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 2027/2819 Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit
• CPC Class Codes: H01F 27/28 Coils; Windings; Conductive connections
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 5/003 Printed circuit coils

Abstract

A power transmission coil in which heat generation by a magnetic shield itself can be suppressed as far as possible is provided.

A power transmission coil is configured by: a coil (1) wound in a plane; and a magnetic shield member (2) disposed on the rear surface of the coil (1). A most part, e.g. 65% or more, and preferably 70% or more of the area of the surface of the magnetic shield member (2) on which the coil is disposed is covered by the coil (1). In this case, the magnetic shield member (2) is formed in a rectangular shape, and the coil (1) is formed in a rectangular shape similar to the magnetic shield member (2).

Claims

1. A power transmission coil configured by:

a coil wound in a plane; and

a magnetic shield member disposed on a rear surface of said coil, wherein

a most part of an area of a surface of said magnetic shield member on which said coil is disposed is covered by said coil.

2. A power transmission coil according to claim 1, wherein an area of said magnetic shield member covered by said coil is 65% or more of the area of said surface of said magnetic shield member on which said coil is disposed.

3. A power transmission coil according to claim 1, wherein 70% or more of the area of the surface of said magnetic shield member on which said coil is disposed is covered by said coil wound in a square manner.

4. A power transmission coil according to claim 1, wherein said magnetic shield member is formed in a rectangular shape, and said coil is formed in a rectangular shape similar to said magnetic shield member.

5. A power transmission coil according to claim 2, wherein said magnetic shield member is formed in a rectangular shape, and said coil is formed in a rectangular shape similar to said magnetic shield member.

6. A power transmission coil according to claim 3, wherein said magnetic shield member is formed in a rectangular shape, and said coil is formed in a rectangular shape similar to said magnetic shield member.