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公开(公告)号：US11101064B2
公开(公告)日：2021-08-24
申请号：US16725159
申请日：2019-12-23
Applicant: TDK CORPORATION
Inventor： Nobuo Takagi , Setu Tsuchida , Tasuku Mikogami
Abstract: A pulse transformer includes a drum core having a winding core, a first flange provided at one end of the winding core in a first direction, and a second flange provided at the other end of the winding core in the first direction. The pulse transformer also includes a plurality of the first electrodes provided in the first flange and arranged in a second direction substantially perpendicular to the first direction, a plurality of second electrodes provided in the second flange and arranged in the second direction, and a plurality of wires wound around the winding core. A length of the pulse transformer in the first and second directions are substantially equal, and a length of the pulse transformer in a third direction substantially perpendicular to the first and second directions is smaller than the length of the pulse transformer in the first and second directions.
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公开(公告)号：US10964465B2
公开(公告)日：2021-03-30
申请号：US16283641
申请日：2019-02-22
Applicant: TDK Corporation
Inventor： Nobuo Takagi , Kouyu Ohi , Tasuku Mikogami , Setu Tsuchida
Abstract: The coil device comprises the magnetic core comprising the axial part and the magnetic core end part connecting to the axial part, the coil part formed by winding the wire around the axial part, and the electrode part provided at the magnetic core end part and made of good conductor. Said electrode part comprises the fixing surface fixed with a wire end part of said wire, and the fixing surface is provided on a side surface which does not intersect with a center axis of said coil part at said magnetic core end part. Said fixing surface is inclined to a direction, away from said center axis with respect to a direction towards said magnetic core end part from said axial part.
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公开(公告)号：US10964464B2
公开(公告)日：2021-03-30
申请号：US16194521
申请日：2018-11-19
Applicant: TDK Corporation
Inventor： Nobuo Takagi
Abstract: The present invention aims to provide a novel magnet, whose surface's insulating property can be increased, and a motor using the same. The present invention provides a magnet comprising a magnet element containing a rare earth element R, a transition metal element T and boron B, and a phosphate layer including manganese-containing phosphate, wherein the phosphate layer is provided on the surface of the magnet element, and the thickness of the phosphate layer is 0.5 μm or more.
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公开(公告)号：US10418174B2
公开(公告)日：2019-09-17
申请号：US15200383
申请日：2016-07-01
Applicant: TDK Corporation
Inventor： Tasuku Mikogami , Nobuo Takagi , Kouyu Ohi , Syun Ashizawa , Setu Tsuchida
Abstract: Disclosed herein is a coil component that includes a drum core including a pair of flange portions and a winding core portion positioned between the flange portions, a plurality of terminal electrodes formed on the flange portions, and a plurality of wires wound around the winding core portion, each end of the wires being electrically connected to an associated one of the terminal electrodes. Each of the flange portions has an inner side surface connected to the winding core portion and an outer side surface opposite to the inner side surface, the outer side surface has a plurality of ridges and at least one groove, and the terminal electrodes are formed on at least the ridges of the outer side surfaces such that the terminal electrodes are isolated from each other by the groove.
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公开(公告)号：US10157707B2
公开(公告)日：2018-12-18
申请号：US15870427
申请日：2018-01-12
Applicant: TDK CORPORATION
Inventor： Nobuo Takagi , Tasuku Mikogami , Setu Tsuchida , Hiroyuki Abe
Abstract: A coil component includes a first core, a second core, a lead wire, an outside mark, and an inside mark. The first core includes a winding portion and a pair of core ends. The second core connects a pair of the core ends and includes an inside surface and an outside surface. The lead wire is wound around the winding portion. The outside mark is formed on the outside surface of the second core and designed to change its arrangement at the time of rotating the second core by 90 degrees in a rotational direction whose central axis is along a normal direction of the outside surface. The inside mark with undulation is formed on the inside surface of the second core and designed to change its arrangement at the time of rotating the second core by 90 degrees in the rotational direction.
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Patent Agency Ranking
公开(公告)号：US10123422B2
公开(公告)日：2018-11-06
申请号：US15803818
申请日：2017-11-05
Applicant: TDK Corporation
Inventor： Nobuo Takagi , Kouyu Ohi , Tasuku Mikogami , Setu Tsuchida
Abstract: Disclosed herein is a coil component that includes a drum-shaped core having a first flange part provided at one end of a winding core part, first to fourth terminal electrodes formed on the first flange part so as to be arranged in this order in a second direction, and first to fourth wires wound around the winding core part. One ends of the first to fourth wires are connected to different ones of the first to fourth terminal electrodes. The first and second terminal electrodes are not symmetrical with the third and fourth terminal electrodes so that the third and fourth terminal electrodes are offset outward compared with the first and second terminal electrodes.
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公开(公告)号：US10014101B2
公开(公告)日：2018-07-03
申请号：US15426325
申请日：2017-02-07
Applicant: TDK Corporation
Inventor： Yoshihiro Kawasaki , Syun Ashizawa , Hirohumi Asou , Nobuo Takagi
CPC classification number: H01F27/255 , H01F3/10 , H01F17/045 , H01F27/2823 , H01F27/2828 , H01F27/29 , H01F27/292
Abstract: Disclosed herein is a coil component that includes a drum core having a winding core and first and second flange portions provided at opposite ends of the winding core; a wire wound around the winding core; terminal electrodes provided in the first and second flange portions, the terminal electrodes being connected to ends of the wire; and a magnetic top plate made of magnetic-powder containing resin in which magnetic powder is mixed in binder resin, the magnetic top plate being fixed to the first and second flange portions. The magnetic top plate has a lower surface facing the first and second flange portions and an upper surface located opposite to the lower surface. The density of the binder resin is higher in a surface layer part on a side of the upper surface than in a surface layer part on a side of the lower surface.
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公开(公告)号：US20180158595A1
公开(公告)日：2018-06-07
申请号：US15870427
申请日：2018-01-12
Applicant: TDK Corporation
Inventor： Nobuo Takagi , Tasuku Mikogami , Setu Tsuchida , Hiroyuki Abe
CPC classification number: H01F27/306 , H01F27/266 , H01F2019/085
Abstract: A coil component includes a first core, a second core, a lead wire, an outside mark, and an inside mark. The first core includes a winding portion and a pair of core ends. The second core connects a pair of the core ends and includes an inside surface and an outside surface. The lead wire is wound around the winding portion. The outside mark is formed on the outside surface of the second core and designed to change its arrangement at the time of rotating the second core by 90 degrees in a rotational direction whose central axis is along a normal direction of the outside surface. The inside mark with undulation is formed on the inside surface of the second core and designed to change its arrangement at the time of rotating the second core by 90 degrees in the rotational direction.
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公开(公告)号：US09978504B2
公开(公告)日：2018-05-22
申请号：US15046195
申请日：2016-02-17
Applicant: TDK CORPORATION
Inventor： Yuuki Narisawa , Nobuo Takagi , Yuu Okabe
CPC classification number: H01F27/2823 , H01F17/04 , H01F27/29 , H01F27/327
Abstract: A coil device includes a core (20) having a columnar shaft (22), a first winding part (42) and a second winding part (46) that are wound around the shaft, and a terminal part (52) connected with ends of the first winding part and ends of the second winding part. A partition portion (30) provided on an outer peripheral surface (22a) of the shaft of the core protrudes from the outer peripheral surface toward the outer diameter direction and divides a part of the first winding part and a part of the second winding part.
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公开(公告)号：US09312061B2
公开(公告)日：2016-04-12
申请号：US14492669
申请日：2014-09-22
Applicant: TDK Corporation
Inventor： Nobuo Takagi , Setu Tsuchida , Tasuku Mikogami , Tomonao Suto
CPC classification number: H01F27/263 , H01F19/08 , H01F2019/085
Abstract: Disclosed herein is a pulse transformer that includes a drum core having a winding core portion and first and second flange portions, a plate core connected to the first and second flange portions, and a plurality of wires that are wound around the winding core portion. The first and second flange portions and the plate core are ground such that an inductance of the pulse transformer is 350 μH or more when a bias current of 8 mA is applied to the wires.
Abstract translation: 本文公开了一种脉冲变压器，其包括具有卷绕芯部分和第一和第二凸缘部分的鼓芯，连接到第一和第二凸缘部分的板芯和缠绕在卷芯部分上的多根线。 第一和第二凸缘部分和板芯被研磨，使得当对电线施加8mA的偏置电流时，脉冲变压器的电感为350μH或更大。
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