公开(公告)号：US20210082606A1

公开(公告)日：2021-03-18

申请号：US16772544

申请日：2019-01-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Hisashi MOGI ,  Fumiaki TAKAHASHI ,  Hideyuki HAMAMURA ,  Satoshi ARAI

IPC: H01F1/147 ,  C21D8/12

Abstract: A grain-oriented electrical steel sheet according to the present invention has a steel sheet surface provided with grooves and includes two or more broken lines including the grooves having a length of 5 to 10 mm on a straight line intersecting a rolling direction on the steel sheet surface. In each of the broken lines including the grooves, the grooves are arranged at equal intervals, and a ratio of the length of the groove to a length of a non-groove is in a range of 1:1 to 1.5:1.

公开(公告)号：US20230298800A1

公开(公告)日：2023-09-21

申请号：US18032848

申请日：2021-10-26

Applicant: NIPPON STEEL CORPORATION

Inventor： Masataka IWAKI ,  Takahito MIZUMURA ,  Hisashi MOGI

IPC: H01F27/245 ,  H01F41/02 ,  H01F27/26

CPC classification number: H01F27/2455 ,  H01F41/024 ,  H01F27/263

Abstract: This wound core (10) is a wound core (10) including a portion in which grain-oriented electrical steel sheets (1) in which planar'portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction and formed by stacking the grain-oriented electrical steel sheets (1) that have been individually bent in layers and assembled into a wound shape, wherein, when an average height of a roughness curve element in a width direction intersecting the longitudinal direction forming a surface of the bent portion (5) of the grain-oriented electrical steel sheet (1) is Ra(b) and an average height of a roughness curve element in a width direction forming ,a surface of the planar portion (4) of the grain-oriented electrical steel sheet (1) is Ra(s), the relationship of 1.00

公开(公告)号：US20230290569A1

公开(公告)日：2023-09-14

申请号：US18032887

申请日：2021-10-26

Applicant: NIPPON STEEL CORPORATION

Inventor： Takahito MIZUMURA ,  Hisashi MOGI ,  Masato MIZOKAMI ,  Masaru TAKAHASHI

IPC: H01F41/02 ,  H01F27/245

CPC classification number: H01F41/024 ,  H01F27/2455

Abstract: A wound core (10) is a wound core having a wound shape (10) including a rectangular hollow portion (15) in a center and a portion in which grain-oriented electrical steel sheets (1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction, which is a wound core formed by stacking the grain-oriented electrical steel sheets(1) that have been individually bent in layers and assembled into a wound shape and in which the plurality of grain-oriented electrical steel sheets are connected to each other via at least one joining part (6) for each roll, wherein the bent portion (5) of the laminated grain-oriented electrical steel sheet (1) has an average Vickers hardness of 190 to 250 HV in an L cross section in the longitudinal direction which is a cross section of the grain-oriented electrical steel sheet (1) in a thickness direction.

公开(公告)号：US20210319943A1

公开(公告)日：2021-10-14

申请号：US17282291

申请日：2019-10-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Takahito MIZUMURA ,  Masato MIZOKAMI ,  Fumiaki TAKAHASHI ,  Hisashi MOGI

IPC: H01F27/245 ,  H01F1/16 ,  H01F41/02

Abstract: When joining end faces of a plurality of soft magnetic sheets which are superposed in the sheet thickness direction and which are bent at parts forming corner areas of a core, offset of positions of the end faces from the desired positions is suppressed.
In a region of a window part comprised of a region inside of a first part 110 and second part 120, a third part 130 with a length in a longitudinal direction (X-axial direction) the same as a length in the X-axial direction of the window part at the position where the third part 130 is arranged is arranged so as to contact the region of the inner circumferential surface between the first corner area 101 and third corner area 103.

公开(公告)号：US20230395319A1

公开(公告)日：2023-12-07

申请号：US18033120

申请日：2021-10-26

Applicant: NIPPON STEEL CORPORATION

Inventor： Takahito MIZUMURA ,  Hisashi MOGI ,  Masato MIZOKAMI ,  Masaru TAKAHASHI

IPC: H01F41/02 ,  H01F27/245 ,  H01F3/04

CPC classification number: H01F41/024 ,  H01F27/2455 ,  H01F3/04

Abstract: A wound core (10) in which, in a laminating direction, when the surface roughness of a steel sheet portion in a direction connecting a center in a sheet thickness direction of a grain-oriented electrical steel sheet (1) positioned on the innermost periphery of the wound core among the laminated grain-oriented electrical steel sheets (1) and a center in the sheet thickness direction of the grain-oriented electrical steel sheet (1) positioned on the outermost periphery of the wound core (10) is Ral, and the surface roughness of the grain-oriented electrical steel sheet (1) in a direction parallel to a longitudinal direction on an end surface of a planar portion (4) of the laminated grain-oriented electrical steel sheet (1) is Rac, a ratio Ral/Rac between Rat and Rac satisfies the relationship of 1.5≤Ral/Rac≤12.0.

公开(公告)号：US20210327631A1

公开(公告)日：2021-10-21

申请号：US17273142

申请日：2019-10-03

Applicant: NIPPON STEEL CORPORATION

Inventor： Hisashi MOGI ,  Takahito MIZUMURA ,  Fumiaki TAKAHASHI ,  Teruyuki TAMAKI

IPC: H01F27/245 ,  H01F41/02

Abstract: The present invention provides a magnetic core and transformer which are reduced in core loss.
The magnetic core according to the present invention comprises a core member which is formed by winding first electrical steel sheets, which is ring shaped seen from a side surface, and which has one or more bent parts seen from a side surface and one or more stacks of second electrical steel sheets stacked together, each the stack being arranged at least at one of the surfaces formed by side surfaces of the first electrical steel sheets at a bent part of the core member so that a surface formed by side surfaces of the second electrical steel sheets runs along it.

公开(公告)号：US20230402221A1

公开(公告)日：2023-12-14

申请号：US18033108

申请日：2021-10-26

Applicant: NIPPON STEEL CORPORATION

Inventor： Masataka IWAKI ,  Takahito MIZUMURA ,  Hisashi MOGI

IPC: H01F27/245 ,  H01F1/147 ,  H01F41/02

CPC classification number: H01F27/2455 ,  H01F1/14775 ,  H01F41/024

Abstract: A wound core (10) is a wound core including a portion in which grain-oriented electrical steel sheets (1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction and formed by stacking the grain-oriented electrical steel sheets (1) that have been individually bent in layers and assembled into a wound shape, wherein, when an average length of a roughness curve element in a width direction intersecting the longitudinal direction forming a surface of the bent portion (5) of the grain-oriented electrical steel sheet (1) is RSm(b), and an average length of the roughness curve element in the width direction forming a surface of the planar portion 4 of the grain-oriented electrical steel sheet (1) is RSm(s), the relationship of 1.00

公开(公告)号：US20220285074A1

公开(公告)日：2022-09-08

申请号：US17641103

申请日：2020-09-03

Applicant: NIPPON STEEL CORPORATION

Inventor： Hisashi MOGI ,  Takahito MIZUMURA ,  Teruyuki TAMAKI ,  Hiroshi FUJIMURA ,  Ryu HIRAYAMA

IPC: H01F27/26

Abstract: A wound core equipped with a laminated body including plural electrical steel sheets stacked in a ring shape in side view. The laminated body includes plural bent portions, and plural block-shaped portions at positions between adjacent bent portions. At least one bent portion among the plural bent portions is a high stacking factor bent portion, wherein a stacking factor of the electrical steel sheets at the high stacking bent portion is higher than an average stacking factor of the steel sheets at the plural block-shaped portions.

公开(公告)号：US20240266102A1

公开(公告)日：2024-08-08

申请号：US18684573

申请日：2022-10-04

Applicant: NIPPON STEEL CORPORATION

Inventor： Takahito MIZUMURA ,  Hisashi MOGI ,  Masaru TAKAHASHI

IPC: H01F27/245 ,  H01F1/147 ,  H01F3/02 ,  H01F41/02

CPC classification number: H01F27/2455 ,  H01F3/02 ,  H01F1/14775 ,  H01F41/0233

Abstract: The wound core of the present invention has at least one arbitrary bent region 5A, in a plurality of corner portions (3), in which the corner portion (3) bulges outward to confine the magnetic flux flowing in the wound core so that the angle θ formed by the straight line PQ and the straight line PR satisfies 23°≤θ≤50°.

公开(公告)号：US20240170196A1

公开(公告)日：2024-05-23

申请号：US18521221

申请日：2023-11-28

Applicant: NIPPON STEEL CORPORATION

Inventor： Takahito MIZUMURA ,  Masato MIZOKAMI ,  Fumiaki TAKAHASHI ,  Hisashi MOGI

IPC: H01F27/245 ,  H01F1/16 ,  H01F3/02 ,  H01F41/02

CPC classification number: H01F27/245 ,  H01F1/16 ,  H01F3/02 ,  H01F41/0233

Abstract: When joining end faces of a plurality of soft magnetic sheets which are superposed in the sheet thickness direction and which are bent at parts forming corner areas of a core, offset of positions of the end faces from the desired positions is suppressed.
In a region of a window part comprised of a region inside of a first part 110 and second part 120, a third part 130 with a length in a longitudinal direction (X-axial direction) the same as a length in the X-axial direction of the window part at the position where the third part 130 is arranged is arranged so as to contact the region of the inner circumferential surface between the first corner area 101 and third corner area 103.