公开(公告)号：US20240204634A1

公开(公告)日：2024-06-20

申请号：US18286534

申请日：2022-04-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Shinsuke TAKATANI ,  Ryu HIRAYAMA ,  Minako FUKUCHI ,  Yoshiaki IWASE ,  Makoto NIWA ,  Makoto HIRAKAWA

IPC: H02K15/12 ,  H02K15/02

CPC classification number: H02K15/12 ,  H02K15/02 ,  H02K2201/09 ,  H02K2215/00

Abstract: This bonded and stacked core manufacturing method is a method for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an anaerobic adhesive and an instantaneous adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerating layer is formed by applying an anaerobic adhesive curing accelerator and an instantaneous adhesive curing accelerator to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied, and drying the adhesive curing accelerator and the instantaneous adhesive curing accelerator.

公开(公告)号：US20250132614A1

公开(公告)日：2025-04-24

申请号：US18691774

申请日：2022-10-19

Applicant: NIPPON STEEL CORPORATION

Inventor： Ryu HIRAYAMA ,  Kazutoshi TAKEDA ,  Takeaki WAKISAKA ,  Shuichi YAMAZAKI

IPC: H02K1/12 ,  H02K1/02

Abstract: An electrical steel sheet includes an annular body. At least one of a plurality of adhesion layers (41) is a first adhesion layer. In one of two electrical steel sheets sandwiching the first adhesion layer in a stacking direction, when an imaginary axis intersecting with a central axis of the annular body and extending in an easy-magnetization direction is defined as an L-axis, an imaginary axis intersecting with the central axis and intersecting with the L-axis is defined as a C-axis, and the electrical steel sheet is partitioned into a plurality of sections(S) in a circumferential direction of the annular body by the L-axis and the C-axis, at least one of the plurality of sections(S) is a first section. In the first section, an area of the first adhesion layer in a first portion (P1) of the electrical steel sheet where a main magnetic flux is generated in the L-axis direction is smaller than an area of the first adhesion layer in a second portion (P2) of the electrical steel sheet where the main magnetic flux is generated in the C-axis direction.

公开(公告)号：US20220069640A1

公开(公告)日：2022-03-03

申请号：US17413121

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuo OHSUGI ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H02K1/12

Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, the electrical steel sheet includes an annular core back part and a plurality of tooth parts that protrude from the core back part in a radial direction and are disposed at intervals in a circumferential direction of the core back part, a fastening part is provided in a portion of the core back part corresponding to the tooth part, and an adhesion part is provided in the tooth part.

公开(公告)号：US20220006336A1

公开(公告)日：2022-01-06

申请号：US17293102

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Kazutoshi TAKEDA ,  Ryu HIRAYAMA

IPC: H02K1/18

Abstract: The present adhesively-laminated core for a stator includes: a plurality of electrical steel sheets coaxially overlapping each other, and each of which having a core back part and a tooth part; and a plurality of adhesion parts which adheres between the electrical steel sheets, in which, between the respective electrical steel sheets, a partial adhesion strength provided by the adhesion parts and being an average adhesion strength per unit area in the tooth part, is lower than a partial adhesion strength provided by the adhesion parts and being an average adhesion strength per unit area in the core back part.

公开(公告)号：US20220006334A1

公开(公告)日：2022-01-06

申请号：US17291344

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Takeaki WAKISAKA ,  Hiroshi FUJIMURA ,  Ryu HIRAYAMA

IPC: H02K1/14 ,  H02K15/02

Abstract: A laminated core includes a plurality of electrical steel sheets that are stacked on one another. All sets of the electrical steel sheets adjacent to each other in a stacking direction are fixed to each other in the laminated core. Some sets of electrical steel sheets among all sets of the electrical steel sheets are fastened but not adhered to each other, and the remaining sets of electrical steel sheets are adhered but not fastened to each other.

公开(公告)号：US20210399594A1

公开(公告)日：2021-12-23

申请号：US17292762

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroshi FUJIMURA ,  Takeaki WAKISAKA ,  Ryu HIRAYAMA

IPC: H02K1/14 ,  H02K1/16

Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, wherein, among the plurality of electrical steel sheets, both of the electrical steel sheets located on a first side in a stacking direction and the electrical steel sheets located on a second side in the stacking direction are fastened to each other but are not adhered to each other, and the electrical steel sheets located in a center in the stacking direction are adhered to each other but are not fastened to each other.

公开(公告)号：US20220384085A1

公开(公告)日：2022-12-01

申请号：US17774771

申请日：2020-11-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Ryu HIRAYAMA ,  Tesshu MURAKAWA ,  Miho TOMITA

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

Abstract: A laminated core (100) has a plurality of legs having an extension direction in a direction perpendicular to a lamination direction of electrical steel sheets and a plurality of yokes having an extension direction in a direction orthogonal to the lamination direction of the electrical steel sheets and the extension direction of the legs, and, in the same position of the electrical steel sheet in the lamination direction, at least a partial region of the legs and at least a partial region of the yokes are configured by the same electrical steel sheet. The electrical steel sheet is disposed such that a first direction of directions of easy magnetization of the electrical steel sheet is along the extension direction of the legs and a second direction of the directions of easy magnetization of the electrical steel sheet is along the extension direction of the yokes.

公开(公告)号：US20220351890A1

公开(公告)日：2022-11-03

申请号：US17639898

申请日：2020-09-03

Applicant: NIPPON STEEL CORPORATION

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

IPC: H01F27/08 ,  H01F27/245 ,  H01F3/02

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 block-shaped portion among the plural block-shaped portions includes a heat transmission path bordered by the electrical steel sheets at least at a portion between the stacked electrical steel sheets. The heat transmission path is included only at the at least one block-shaped portion.

公开(公告)号：US20220094218A1

公开(公告)日：2022-03-24

申请号：US17299886

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuo OHSUGI ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H02K1/18 ,  C09J133/08

Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, each of the electrical steel sheets includes an annular core back part; a plurality of fastening parts are provided in the core back part at intervals in a circumferential direction; an adhesion region is formed on an outer circumferential side from the fastening parts in the core back part; and a non-adhesion region is formed on an inner circumferential side from the fastening parts in the core back part.

公开(公告)号：US20220028608A1

公开(公告)日：2022-01-27

申请号：US17312103

申请日：2019-12-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahito KAMIKAWABATA ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

IPC: H01F41/02 ,  H02K1/27 ,  H02K1/18 ,  H01F27/245

Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.