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    Grain-oriented electrical steel sheet
    1.
    发明授权
    Grain-oriented electrical steel sheet 有权

    公开(公告)号：US11198916B2

    公开(公告)日：2021-12-14

    申请号：US16648663

    申请日：2018-09-25

    申请人： JFE STEEL CORPORATION

    发明人： Kunihiro Senda ,  Makoto Watanabe ,  Seiji Okabe ,  Souichiro Yoshizaki

    IPC分类号： C22C38/00 ,  C22C38/60 ,  C23C22/00 ,  C21D8/12 ,  C21D6/00 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  H01F1/16

    摘要： Further lower iron loss can be achieved in a grain-oriented electrical steel sheet including: a predetermined film mainly composed of forsterite on a front and back surfaces thereof; and a plurality of grooves on the front surface thereof, in which the plurality of grooves have an average depth of 6% or more of a thickness of the steel sheet and are spaced a distance of 1 mm to 15 mm from respective adjacent grooves, the steel sheet has a specific magnetic permeability μr15/50 of 35000 or more when subjected to alternating current magnetization at a frequency of 50 Hz and a maximum magnetic flux density of 1.5 T, and the steel sheet includes isolated parts having a presence frequency of 0.3/μm or less, the isolated parts being separated from a continuous part of the film in an interface between the steel sheet and the film in a cross section orthogonal to the rolling direction of the steel sheet.

    Motor
    2.
    发明授权
    Motor 有权

    公开(公告)号：US11551839B2

    公开(公告)日：2023-01-10

    申请号：US17054605

    申请日：2019-03-20

    申请人： JFE Steel Corporation

    发明人： Souichiro Yoshizaki ,  Yoshiaki Zaizen ,  Kunihiro Senda

    IPC分类号： H01F1/147 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H02K1/02

    摘要： A motor comprising a steel sheet used as a core material of the motor, wherein the steel sheet includes a composition including: by mass %, 0.010% or less of C; 2.0% to 7.0% of Si; 2.0% or less of Al; 0.05% to 1.0% of Mn; 0.005% or less of S; 0.005% or less of N; and balance Fe and inevitable impurities; the steel sheet includes a magnetic flux density changing area where a change ΔB in magnetic flux density to a change ΔH=50 A/m in a magnetic field, is equal to or higher than 0.50 T; a thickness of the steel sheet is 0.05 mm to 0.20 mm; and an eddy-current loss of the steel sheet, at 1000 Hz−1.0 T, is equal to or less than 0.55 of a total iron loss.

    MOTOR
    5.
    发明申请
    MOTOR 有权

    公开(公告)号：US20210125759A1

    公开(公告)日：2021-04-29

    申请号：US17054605

    申请日：2019-03-20

    申请人： JFE Steel Corporation

    发明人： Souichiro Yoshizaki ,  Yoshiaki Zaizen ,  Kunihiro Senda

    IPC分类号： H01F1/147 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  H02K1/02

    摘要： A motor comprising a steel sheet used as a core material of the motor, wherein the steel sheet includes a composition including: by mass %, 0.010% or less of C; 2.0% to 7.0% of Si; 2.0% or less of Al; 0.05% to 1.0% of Mn; 0.005% or less of S; 0.005% or less of N; and balance Fe and inevitable impurities; the steel sheet includes a magnetic flux density changing area where a change ΔB in magnetic flux density to a change ΔH=50 A/m in a magnetic field, is equal to or higher than 0.50 T; a thickness of the steel sheet is 0.05 mm to 0.20 mm; and an eddy-current loss of the steel sheet, at 1000 Hz−1.0 T, is equal to or less than 0.55 of a total iron loss.