公开(公告)号：US20160141089A1

公开(公告)日：2016-05-19

申请号：US14898587

申请日：2014-05-16

Applicant: FDK CORPORATION

Inventor： Kiyohisa YAMAUCHI ,  Daisuke MATSUBAYASHI ,  Juji KATO ,  Mikio KITAOKA ,  Shigenori SUZUKI

IPC: H01F27/255 ,  H01F27/245 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F17/0013 ,  H01F17/0033 ,  H01F21/00 ,  H01F27/245 ,  H01F27/2804 ,  H01F2017/0066 ,  H01F2027/2809

Abstract: A multilayer inductor providing improved DC superposition characteristics by a permanent magnet that emits a bias magnetic flux, and having a low-loss material as a magnetic body to improve converter conversion efficiency. The multilayer inductor has a plurality of laminated electrically insulating magnetic layers; and laminated conductive patterns, each of the conductive patterns being connected in sequence in the lamination direction forming a spiral coil inside the magnetic layer. An magnetized annular permanent magnet layer emits a magnetic flux whose direction is opposite that of a magnetic flux excited by the coil is between an outer peripheral edge of the inductor and an outer peripheral edge of the coil so as not to overlap an inner peripheral part of the magnet layer with the conductive patterns and so as to block a space between the conductive patterns and the magnet layer, in axial view of the coil.

Abstract translation: 一种多层电感器，其通过发出偏置磁通量的永磁体提供改进的直流叠加特性，并且具有作为磁体的低损耗材料以提高转换器转换效率。 多层电感器具有多个层叠的电绝缘磁性层; 和层叠导电图案，每个导电图案在层叠方向上依次连接，在磁性层内形成螺旋线圈。 磁化的环形永磁体层发射磁通，该磁通的方向与由线圈激励的磁通的方向相反，该磁通位于电感器的外周边缘与线圈的外周边缘之间，以便不与线圈的内周部分重叠 具有导电图案的磁体层，并且在线圈的轴向视图中阻挡导电图案和磁体层之间的空间。