中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

22 records (took 0.029 seconds)

    WOUND CORE AND METHOD FOR PRODUCING WOUND CORE
    12.
    发明申请
    WOUND CORE AND METHOD FOR PRODUCING WOUND CORE 有权

    公开(公告)号：US20250087396A1

    公开(公告)日：2025-03-13

    申请号：US18580528

    申请日：2022-06-08

    Applicant: JFE STEEL CORPORATION

    Inventor： Hirotaka INOUE ,  Takeshi OMURA ,  Kunihiro SENDA

    IPC: H01F3/02 ,  H01F41/02

    Abstract: A wound core with low transformer iron loss and good magnetic characteristics without using two or more types of materials with different magnetic characteristics. The wound core includes a grain-oriented electrical steel sheet as a material and has a flat surface portion, a corner portion adjacent to the flat surface portion, a lap portion in the flat surface portion, and a bent portion in the corner portion, and the ratio of the length of the outer circumference to the length of the inner circumference (the length of the outer circumference/the length of the inner circumference) is 1.80 or less when viewed from the side, and the grain-oriented electrical steel sheet has a magnetic flux density B8 in the range of 1.84 T to 1.91 T at a magnetic field strength H of 800 A/m and has a specified iron loss deterioration rate of 1.50 or less under compressive stress.

    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR
    14.
    发明申请
    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR 审中-公开

    公开(公告)号：US20200035392A1

    公开(公告)日：2020-01-30

    申请号：US16487994

    申请日：2018-02-20

    Applicant: JFE STEEL CORPORATION

    Inventor： Takeshi OMURA ,  Hirotaka INOUE ,  Shigehiro TAKAJO

    IPC: H01F1/18 ,  C21D8/12 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147

    Abstract: Disclosed is a grain-oriented electrical steel sheet including: closure domains, each containing a discontinuous region at a part thereof and extending at an angle within 30° with respect to a transverse direction of the steel sheet, wherein a closure domain overlapping portion in the discontinuous region on one surface of the steel sheet has a length α in the transverse direction that is longer than a length β in the transverse direction of the closure domain overlapping portion on the other surface of the steel sheet, and the length α satisfies 0.5≤α≤5.0 and the length β satisfies 0.2α≤β≤0.8α. Consequently, the iron loss and the deterioration of magnetostrictive properties are suppressed in discontinuous regions, which would be inevitably formed when magnetic domain refining treatment is performed using a plurality of irradiation devices.

    WOUND CORE AND METHOD FOR PRODUCING WOUND CORE
    17.
    发明公开
    WOUND CORE AND METHOD FOR PRODUCING WOUND CORE 审中-公开

    公开(公告)号：US20240321492A1

    公开(公告)日：2024-09-26

    申请号：US18580493

    申请日：2022-06-08

    Applicant: JFE STEEL CORPORATION

    Inventor： Hirotaka INOUE ,  Takeshi OMURA ,  Kunihiro SENDA

    IPC: H01F1/147 ,  C21D1/30 ,  C21D6/00 ,  C21D10/00 ,  H01F27/245

    CPC classification number: H01F1/14783 ,  C21D1/30 ,  C21D6/00 ,  C21D10/00 ,  H01F27/245 ,  C21D2201/05

    Abstract: A wound core with low transformer iron loss and good magnetic characteristics without using two or more types of materials with different magnetic characteristics. The wound core includes a grain-oriented electrical steel sheet as a material and has a flat surface portion, a corner portion adjacent to the flat surface portion, a lap portion in the flat surface portion, and a bent portion in the corner portion, and the ratio of the length of the outer circumference to the length of the inner circumference (the length of the outer circumference/the length of the inner circumference) is 1.70 or less when viewed from the side, and the grain-oriented electrical steel sheet has a magnetic flux density B8 in the range of 1.92 T to 1.98 T at a magnetic field strength H of 800 A/m and has a specified iron loss deterioration rate of 1.30 or less under harmonic superposition.

    IRON CORE FOR TRANSFORMER
    19.
    发明申请
    IRON CORE FOR TRANSFORMER 有权

    公开(公告)号：US20210027939A1

    公开(公告)日：2021-01-28

    申请号：US17042182

    申请日：2019-03-29

    Applicant: JFE STEEL CORPORATION

    Inventor： Takeshi OMURA ,  Hirotaka INOUE ,  Seiji OKABE

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

    Abstract: Vibration of an iron core is reduced to reduce transformer noise. An iron core for a transformer comprises a plurality of grain-oriented electrical steel sheets stacked together, wherein at least one of the plurality of grain-oriented electrical steel sheets: (1) has a region in which closure domains are formed in a direction crossing a rolling direction and a region in which no closure domains are formed; and (2) has an area ratio R of 0.10% to 30%, the area ratio R being an area ratio, to the whole grain-oriented electrical steel sheet, of a region in which a shrinkage amount at a maximum displacement point when excited in the rolling direction at a maximum magnetic flux density of 1.7 T and a frequency of 50 Hz is at least 2×10−7 less than a shrinkage amount in the region in which no closure domains are formed.

    TRANSFORMER IRON CORE
    20.
    发明申请
    TRANSFORMER IRON CORE 审中-公开

    公开(公告)号：US20200051731A1

    公开(公告)日：2020-02-13

    申请号：US16486505

    申请日：2018-03-29

    Applicant: JFE STEEL CORPORATION

    Inventor： Seiji OKABE ,  Takeshi OMURA ,  Hirotaka INOUE

    IPC: H01F27/245

    Abstract: Iron core vibration and transformer noise can be reduced by using, as a transformer iron core, an iron core formed by a stack of at least two types of grain-oriented electrical steel sheets that differ in magnetostriction by 2×10−7 or more when excited from 0 T to 1.7 T.

Patent Agency Ranking