Title:
STACKED INDUCTOR
Document Type and Number:
WIPO Patent Application WO/2014/203447
Kind Code:
A1
Abstract:
Provided is a stacked inductor in which it is possible to significantly improve DC bias characteristics by way of a permanent magnet which emits a bias magnetic flux, and in which it is possible to use a low-loss material as magnetic material so as to also achieve improvement of converter conversion efficiency. The present invention is a stacked inductor in which a plurality of electrically insulating magnetic layers (1) and conductive patterns (2) are stacked, such that between the outer peripheral edge of the stacked inductor, in which a coil (2) which orbits spirally is formed within the magnetic layers (1) by way of the conductive patterns (2) being sequentially connected in the direction of stacking, and the outer peripheral edge of the coil (2), annular permanent magnetic layers (6), which have been magnetized so as to emit magnetic flux in the opposite direction of the direction of magnetic flux excited by the coil (2), are disposed so that, in axial view of the coil, the inner circumferential portion of the annular permanent magnetic layers (6) do not overlap with the conductive patterns (2), and gaps between the permanent magnetic layers and the conductive patterns (2) are blocked.
Inventors:
YAMAUCHI KIYOHISA (JP)
MATSUBAYASHI DAISUKE (JP)
KATO JUJI (JP)
KITAOKA MIKIO (JP)
SUZUKI SHIGENORI (JP)
MATSUBAYASHI DAISUKE (JP)
KATO JUJI (JP)
KITAOKA MIKIO (JP)
SUZUKI SHIGENORI (JP)
Application Number:
PCT/JP2014/002577
Publication Date:
December 24, 2014
Filing Date:
May 16, 2014
Export Citation:
Assignee:
FDK CORP (JP)
International Classes:
H01F17/00; H01F17/04
Foreign References:
| JP2006196591A | 2006-07-27 | |||
| JP2002175917A | 2002-06-21 | |||
| JP2002175927A | 2002-06-21 | |||
| JPH0281410A | 1990-03-22 |
Attorney, Agent or Firm:
SHIMIZU, CHIHARU (JP)
Spring water Chiharu (JP)
Spring water Chiharu (JP)
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