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公开(公告)号：US09978491B2
公开(公告)日：2018-05-22
申请号：US14380019
申请日：2013-02-08
Applicant: FDK CORPORATION
Inventor： Masaru Ota , Mikio Kitaoka , Yuko Kanazawa
CPC classification number: H01F3/14 , H01F17/043 , H01F2003/103 , H01F2003/106
Abstract: A choke coil including a coil (6) and a core (1) including a first core part (5) inserted into a central hole of the coil (6) and a plurality of second core parts (4) disposed along the outer periphery of the coil. The first core part (5) and the second core part (4) form a closed magnetic path. The second core parts (4) are shaped so that the total sum of the areas of cross sections thereof perpendicular to the axis of the coil is greater than the area of a cross section of the first core part (5). A gap part (G) is formed in the second core parts (4), and a ferrite magnet (7) that applies a magnetic bias is disposed in the gap part (G).
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公开(公告)号：US20150042433A1
公开(公告)日：2015-02-12
申请号：US14380019
申请日：2013-02-08
Applicant: FDK CORPORATION
Inventor： Masaru Ota , Mikio Kitaoka , Yuko Kanazawa
IPC: H01F3/14
CPC classification number: H01F3/14 , H01F17/043 , H01F2003/103 , H01F2003/106
Abstract: Problem to be SolvedTo provide a choke coil that can apply an optimal magnetic bias even when the current increases and can be reduced in size, weight and cost.SolutionThe present invention provides a choke coil including a coil (6) and a core (1) including a first core part (5) inserted into a central hole of the coil (6) and a plurality of second core parts (4) disposed along the outer periphery of the coil, the first core part (5) and the second core part (4) forming a closed magnetic path, wherein the second core parts (4) are shaped so that the total sum of the areas of cross sections thereof perpendicular to the axis of the coil is greater than the area of a cross section of the first core part (5), a gap part (G) is formed in the second core parts (4), and a ferrite magnet (7) that applies a magnetic bias is disposed in the gap part (G).
Abstract translation: 要解决的问题为了提供即使在电流增加并且可以减小尺寸，重量和成本的情况下也能施加最佳磁偏压的扼流线圈。 解决方案本发明提供一种包括线圈（6）和芯（1）的扼流线圈，其包括插入线圈（6）的中心孔中的第一芯部（5）和设置在线圈 沿着线圈的外周，第一芯部（5）和第二芯部（4）形成闭合磁路，其中第二芯部（4）成形为使得横截面的面积的总和 垂直于线圈的轴线大于第一芯部分（5）的横截面的面积，在第二芯部（4）中形成间隙部分（G），并且铁氧体磁体（7） 施加磁偏压设置在间隙部分（G）中。
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公开(公告)号：US10224139B2
公开(公告)日：2019-03-05
申请号：US15514747
申请日：2015-09-18
Applicant: FDK CORPORATION
Inventor： Yuko Kanazawa , Masaru Shinoda , Kiyoto Ono , Tetsu Yamanaka , Mikio Kitaoka
Abstract: A coil device includes two core members, one of which is E-shaped. The E-shaped core member has left and right side faces, and a center leg that extends in a vertical direction. A conducting wire is wound around a core, the core being composed of the two core members arranged to face each other in the vertical direction with a gap between the two core members. The conducting wire is wound around the center leg. First and second heat-sinking plates made of metal are bent so as to be in contact with upper and side faces of the core. The first and second plates are arranged so that first edges of the plates are placed left-right symmetrically with respect to the core with a gap between the edges. Second edges of the plates are in contact with a metal heat-sinking board where the core is placed.
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