Nippon Steel Corporation

Toagosei Company, Ltd.

Ryu Hirayama

Kazutoshi Takeda

Hiroshi Fujimura

Takeaki Wakisaka

Takahito Mizumura

Yasuo Ohsugi

Masahito Kamikawabata

Hiroshi Harada

Shinsuke Takatani

Hisashi Mogi

Tesshu Murakawa

Miho Tomita

Minako Fukuchi

Teruyuki Tamaki

Tomohiro Konno

Keisuke Fujisaki

Makoto Hirakawa

Rei Honma

Yoshiaki Iwase

Makoto Niwa

Yasuji Tomizawa

Sumio Matsumori

Akinori Wakagi

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.

Wound core

This bonded and stacked core manufacturing method is 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 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 accelerator having an average viscosity of 0.01 Pa·s to 100 Pa·s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.

Bonded and stacked core manufacturing method and bonded and stacked core manufacturing apparatus

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.

A laminated core () 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.

Laminated core and electrical device

A laminated core including a plurality of electrical steel sheets stacked on each other, and adhesion parts which are provided between the electrical steel sheets adjacent to each other in an axial direction thereof and adhering the electrical steel sheets to each other, in which each of the electrical steel sheets includes an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, and each of the tooth parts of the electrical steel sheets has an adhesion region provided with the adhesion part having a belt shape extending in the circumferential direction.

Laminated core and electric motor

Provided is an adhesively-laminated core for a stator including: a plurality of electrical steel sheets which have phosphate-based insulation coatings on surfaces thereof and are overlapped coaxially with each other; and adhesion parts provided between the respective electrical steel sheets, an average thickness of the insulation coatings is 0.3 μm to 1.2 μm, an average thickness of the adhesion parts is 1.0 μm to 3.0 μm, and in a case where the average thickness of the insulation coating is defined as t1 in a unit of μm, and the average thickness of the adhesion parts is defined as t2 in a unit of μm, the following Equation 1 is satisfied.−4.3×1+3.6≤2≤−4.3×1+6.9  (Equation 1)

Adhesively-laminated core for stator and electric motor

What is disclosed is a core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block including: a plurality of electrical steel sheet pieces stacked to each other; and an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other, in which an adhesion area ratio of the electrical steel sheet piece by the adhesion part is 1% or more and 60% or less.

Core block, laminated core, and electric motor

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.

Laminated core with some electrical steel sheets adhered with adhesive and some electrical steel sheets fixed to each other

In an adhesively-laminated core for a stator, a chemical component of each of electrical steel sheets includes 2.5% to 3.9% by mass of Si, an average tensile modulus of elasticity of each of adhesion parts is 2500 MPa to 5000 MPa, and when an average sheet thickness of the each of electrical steel sheets is t1 in units of mm, an average thickness of the each of adhesion parts is t2 in units of μm, and an average value of yield strengths of the each of electrical steel sheets is YP in units of MPa, a condition A of satisfying the following expressions 1, 2, and 3 or a condition B of satisfying the following expressions 3, 4, and 5 or combination thereof is satisfied.50×t1−12≤t2≤50×t1−6  (expression 1)0.15≤t1≤0.27  (expression 2)0.5≤t2≤2.5  (expression 3)0.025×YP−12≤t2≤0.025×YP−8  (expression 4)380≤YP≤540  (expression 5)

A laminated core according to an aspect of the present invention includes a plurality of electrical steel sheets stacked to each other; and a plurality of adhesion parts that are provided between the electrical steel sheets adjacent to each other in a stacking direction and adhere the electrical steel sheets to each other, in which, when viewed in the stacking direction, the plurality of adhesion parts are formed in a belt shape that extends in a first direction, the plurality of adhesion parts are arranged in a second direction orthogonal to the first direction, and an angle formed by the first direction and a rolling direction of the electrical steel sheet is 30° or more and 90° or less.

Laminated core, core block, electric motor and method of producing core block

A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part which is provided between the electrical steel sheets adjacent to each other in a stacking direction and adheres the electrical steel sheets to each other, in which the electrical steel sheet include an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, an adhesion region in which the adhesion part is provided is formed in the core back part of the electrical steel sheet, and the adhesion region extends in a direction along a magnetic flux passing through a region of the electrical steel sheet in contact with the adhesion region.

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.

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.

Laminated core with center electrical steel sheets adhered with adhesive and some electrical steel sheets fixed to each other on both ends of the center sheets

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.

A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.

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Tokyo, Japan

Ryu Hirayama