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    CORE BLOCK, LAMINATED CORE, AND ELECTRIC MOTOR
    35.
    发明申请
    CORE BLOCK, LAMINATED CORE, AND ELECTRIC MOTOR 有权

    公开(公告)号：US20220209592A1

    公开(公告)日：2022-06-30

    申请号：US17606036

    申请日：2020-06-22

    Applicant: NIPPON STEEL CORPORATION

    Inventor： Ryu HIRAYAMA ,  Kazutoshi TAKEDA

    IPC: H02K1/18 ,  H01F3/02 ,  H01F27/245 ,  H01F27/26

    Abstract: 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.

    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME
    36.
    发明申请
    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR MANUFACTURING SAME 有权

    公开(公告)号：US20220090239A1

    公开(公告)日：2022-03-24

    申请号：US17421769

    申请日：2020-01-16

    Applicant: NIPPON STEEL CORPORATION

    Inventor： Kazutoshi TAKEDA ,  Ichiro TANAKA ,  Takashi KATAOKA ,  Tomoya SUENAGA ,  Yuki KUNITA

    IPC: C22C38/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C21D9/46 ,  C21D8/02

    Abstract: A grain-oriented electrical steel sheet is a grain-oriented electrical steel sheet which does not have an inorganic coating containing forsterite as a main component and which includes: a base steel sheet containing a prescribed chemical component; a silicon-containing oxide layer provided on the base steel sheet; an iron-based oxide layer provided on the silicon-containing oxide layer; and a tension-insulation coating provided on the iron-based oxide layer, having a thickness of 1 to 3 μm, and containing phosphate and colloidal silica as main components. When the tension-insulation coating undergoes elemental analysis using a glow discharge optical emission spectrometry in a sheet thickness direction from a surface of the tension-insulation coating, a peak Si emission intensity satisfies a prescribed requirement.

    ADHESIVELY-LAMINATED CORE FOR STATOR AND ELECTRIC MOTOR
    37.
    发明申请
    ADHESIVELY-LAMINATED CORE FOR STATOR AND ELECTRIC MOTOR 有权

    公开(公告)号：US20220020521A1

    公开(公告)日：2022-01-20

    申请号：US17294519

    申请日：2019-12-17

    Applicant: NIPPON STEEL CORPORATION

    Inventor： Kazutoshi TAKEDA ,  Ryu HIRAYAMA

    IPC: H01F27/245 ,  H01F41/02 ,  H02K15/02 ,  H02K1/18

    Abstract: 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×t1+3.6≤t2≤−4.3×t1+6.9  (Equation 1)

    ADHESIVELY-LAMINATED CORE FOR STATOR AND ELECTRIC MOTOR
    38.
    发明申请
    ADHESIVELY-LAMINATED CORE FOR STATOR AND ELECTRIC MOTOR 有权

    公开(公告)号：US20220014053A1

    公开(公告)日：2022-01-13

    申请号：US17293961

    申请日：2019-12-17

    Applicant: NIPPON STEEL CORPORATION

    Inventor： Kazutoshi TAKEDA ,  Ryu HIRAYAMA

    IPC: H02K1/18

    Abstract: 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)

    LAMINATED CORE AND ELECTRIC MOTOR
    39.
    发明申请
    LAMINATED CORE AND ELECTRIC MOTOR 有权

    公开(公告)号：US20220014052A1

    公开(公告)日：2022-01-13

    申请号：US17293795

    申请日：2019-12-17

    Applicant: NIPPON STEEL CORPORATION

    Inventor： Masahito KAMIKAWABATA ,  Ryu HIRAYAMA ,  Kazutoshi TAKEDA

    IPC: H02K1/18

    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part provided between electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein the adhesion part partially adheres the electrical steel sheets adjacent to each other in the stacking direction, and the adhesion parts adjacent to each other in the stacking direction have different arrangement regions in a plan view seen in the stacking direction.

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