公开(公告)号：US20230136361A1

公开(公告)日：2023-05-04

申请号：US18088674

申请日：2022-12-26

Applicant: TDK Corporation

Inventor： Yugo ASAI ,  Tsutomu KOBAYASHI ,  Daisuke URABE ,  Hiroshi SUZUKI ,  Emi ITO ,  Toshio TOMONARI

IPC: H03H7/42 ,  H01F17/04 ,  H01F27/00 ,  H01F27/06 ,  H03H1/00 ,  H03H7/09 ,  H01F27/28

Abstract: Disclosed herein is a common mode filter that includes a winding core part and first and second wires wound in a same direction around the winding core part. The first and second wires constitute a first winding block on one endmost side in an axial direction of the winding core part, a second winding block on other endmost side in the axial direction of the winding core part, and a third winding block positioned between the first and second winding blocks. The second winding block is a winding block at an odd-numbered position counted from the first winding block. The first and second wires cross each other in an area between the first and third winding blocks and in an area between the second and third winding blocks.

公开(公告)号：US20210391109A1

公开(公告)日：2021-12-16

申请号：US17342080

申请日：2021-06-08

Applicant: TDK Corporation

Inventor： Kosuke KUNITSUKA ,  Keigo HIGASHIDA ,  Emi ITO ,  Daisuke URABE ,  Yugo ASAI

IPC: H01F17/04 ,  H01F27/29 ,  H01F27/28 ,  H01F27/30

Abstract: Disclosed herein is a common mode filter that includes first and second wires wound in the same direction around the winding core part. The first and second wires have first to third layer winding portions, a first crossing portion positioned between the first and third layer winding portions, and a second crossing portion positioned between the second and third layer winding portions. The vertical positions of the first and second wires are reversed at least partially between the first and third layer winding portions, and the vertical positions of the first and second wires are reversed at least partially between the second and third layer winding portions.

公开(公告)号：US20180286553A1

公开(公告)日：2018-10-04

申请号：US15903696

申请日：2018-02-23

Applicant: TDK CORPORATION

Inventor： Tsutomu KOBAYASHI ,  Toshio TOMONARI ,  Kiyofumi FUJIWARA ,  Emi ITO

IPC: H01F17/04 ,  H01F27/24 ,  H01F27/28 ,  H01F27/00 ,  H01F27/29

Abstract: A coil device includes a core, an inner coil portion, an outer coil portion, and an intermediate resin layer. The core includes a winding portion and a flange positioned at an end of the winding portion in an axial direction. The inner coil portion is constituted by winding a first wire around the winding portion. The outer coil portion is constituted by winding a second wire outside the inner coil portion. The intermediate resin layer exists between the inner coil portion and the outer coil portion.

公开(公告)号：US20240039503A1

公开(公告)日：2024-02-01

申请号：US18379596

申请日：2023-10-12

Applicant: TDK Corporation

Inventor： Yugo ASAI ,  Tsutomu KOBAYASHI ,  Daisuke URABE ,  Hiroshi SUZUKI ,  Emi ITO ,  Toshio TOMONARI

IPC: H03H7/42 ,  H01F27/28 ,  H03H7/09 ,  H03H1/00 ,  H01F27/06 ,  H01F17/04 ,  H01F27/00

CPC classification number: H03H7/427 ,  H01F27/2823 ,  H03H7/09 ,  H03H1/00 ,  H01F27/06 ,  H01F17/04 ,  H01F17/045 ,  H01F27/006 ,  H01F2017/0093

Abstract: Disclosed herein is a common mode filter that includes a winding core part and first and second wires wound in a same direction around the winding core part. The first and second wires constitute a first winding block on one endmost side in an axial direction of the winding core part, a second winding block on other endmost side in the axial direction of the winding core part, and a third winding block positioned between the first and second winding blocks. The second winding block is a winding block at an odd-numbered position counted from the first winding block. The first and second wires cross each other in an area between the first and third winding blocks and in an area between the second and third winding blocks.

公开(公告)号：US20210391108A1

公开(公告)日：2021-12-16

申请号：US17342051

申请日：2021-06-08

Applicant: TDK Corporation

Inventor： Kosuke KUNITSUKA ,  Keigo HIGASHIDA ,  Emi ITO

IPC: H01F17/04 ,  H01F27/29 ,  H01F27/28 ,  H01F27/30

Abstract: Disclosed herein is a common mode filter that includes a core having a winding core part and first and second wires wound in a same direction around the winding core part. The first and second wires have a first crossing portion at which first turns thereof counted from one ends thereof cross each other and a second crossing portion at which first turns thereof counted from the other ends thereof cross each other. The first and second wires are wound by layer winding in an aligned state with one of the first and second wires positioned in a lower layer and other one thereof positioned in an upper layer in at least parts of the first and second wires between second turns thereof counted from the one ends thereof and second turns thereof counted from the other ends thereof.

公开(公告)号：US20210280355A1

公开(公告)日：2021-09-09

申请号：US17189494

申请日：2021-03-02

Applicant: TDK CORPORATION

Inventor： Kosuke KUNITSUKA ,  Keigo HIGASHIDA ,  Emi ITO

IPC: H01F27/28 ,  H01F27/24 ,  H01F27/29

Abstract: A coil device includes a core having a winding core portion and flange portions and formed in end portions of the winding core portion, a first winding portion formed by winding a first primary wire and a first secondary wire around the winding core portion, and a second winding portion formed by winding a second primary wire and a second secondary wire around the winding core portion. The second winding portion is formed with an alternating winding region where the second primary wire and the second secondary wire are alternately disposed and wound and a continuous winding region where either the second primary wire or the second secondary wire is continuously wound.

公开(公告)号：US20190089320A1

公开(公告)日：2019-03-21

申请号：US16192047

申请日：2018-11-15

Applicant: TDK Corporation

Inventor： Tsutomu KOBAYASHI ,  Toshio TOMONARI ,  Emi ITO ,  Yuma KOYAMA

IPC: H03H1/00 ,  H01F5/00 ,  H03H7/42 ,  H01F27/28 ,  H01F27/00 ,  H01F17/04 ,  H01F41/069 ,  H01F17/00

CPC classification number: H03H1/00 ,  H01F5/00 ,  H01F17/045 ,  H01F27/006 ,  H01F27/2823 ,  H01F41/069 ,  H01F2017/0093 ,  H03H7/427 ,  H03H2001/0021 ,  H03H2001/0035 ,  H03H2001/0092

Abstract: Disclosed herein is a common mode filter that includes first and second terminal electrodes provided on the first flange part, third and fourth terminal electrodes provided on the second flange part, a first wire wound around the winding core part and having one end connected to the first terminal electrode and other end connected to the third terminal electrode, and a second wire wound around the winding core part and having one end connected to the second terminal electrode and other end connected to the fourth terminal electrode. The winding core part includes a first winding region, a second winding region, and a third winding region positioned between the first and second winding regions in the axial direction. The first and second wires are bifilar-wound in the first and second winding regions and layer-wound in the third winding region.

公开(公告)号：US20210391110A1

公开(公告)日：2021-12-16

申请号：US17342119

申请日：2021-06-08

Applicant: TDK Corporation

Inventor： Kosuke KUNITSUKA ,  Keigo HIGASHIDA ,  Emi ITO

IPC: H01F17/04 ,  H01F27/29 ,  H01F27/28 ,  H01F27/30

Abstract: Disclosed herein is a common mode filter that includes first and second wires wound in the same direction around the winding core part. The first and second wires include first and second layer winding portions each including a plurality of blocks axially alternately arranged. A first block belonging to the first layer winding portion is disposed closest to the first flange part. A second block belonging to the second layer winding portion is disposed closest to the second flange part. The first and second wires cross each other in a region between axially adjacent blocks.

公开(公告)号：US20170263373A1

公开(公告)日：2017-09-14

申请号：US15446601

申请日：2017-03-01

Applicant: TDK CORPORATION

Inventor： Syun ASHIZAWA ,  Toshio TOMONARI ,  Hirohumi ASOU ,  Emi ITO

IPC: H01F27/28 ,  H01F27/29

Abstract: A coil device includes a winding core with a coil portion wound by a wire, first and second flanges with open magnetic circuit respectively formed on both sides of the winding core in an axial direction, and a first facing surface of the first flange and a second facing surface of the second flange facing each other in the axial direction on an outer circumference side of the coil portion. S1/S2 is 0.2 to 1.0, where S1 is a maximum lateral cross sectional area of the winding core as seen from the axial direction, and S2 is a projected overlapping area overlapped by the first facing surface and the second facing surface as seen from the axial direction.

公开(公告)号：US20190229697A1

公开(公告)日：2019-07-25

申请号：US16236563

申请日：2018-12-30

Applicant: TDK Corporation

Inventor： Yugo ASAI ,  Tsutomu KOBAYASHI ,  Daisuke URABE ,  Hiroshi SUZUKI ,  Emi ITO ,  Toshio TOMONARI

IPC: H03H7/09 ,  H01F27/29 ,  H01F27/24

Abstract: Disclosed herein is a common mode filter that includes a winding core part and first and second wires wound in a same direction around the winding core part. A predetermined one turn of the first wire crosses a predetermined one turn of the second wire a plurality of times.