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    Magnetic Material, Iron Core, and Rotating Electric Machine
    2.
    发明公开
    Magnetic Material, Iron Core, and Rotating Electric Machine 审中-公开

    公开(公告)号：US20240186841A1

    公开(公告)日：2024-06-06

    申请号：US18287723

    申请日：2022-04-05

    申请人： Hitachi, Ltd.

    发明人： Yusuke ASARI ,  Tomohiro TABATA ,  Shinya TAMURA ,  Matahiro KOMURO ,  Shohei TERADA

    IPC分类号： H02K1/02 ,  H01F1/16 ,  H01F27/245

    CPC分类号： H02K1/02 ,  H01F1/16 ,  H01F27/245

    摘要： A magnetic material includes body-centered tetragonal (bct) crystal including iron and nitrogen, in which a molar ratio of iron to nitrogen in the crystal exceeds 8. An iron core includes soft magnetic steel sheets stacked together, in which a part or the entirety of the soft magnetic steel sheets is formed of the magnetic material which includes body-centered tetragonal (bct) crystal including iron and nitrogen and has a molar ratio of iron to nitrogen in the crystal exceeds 8. A rotating electric machine includes an iron core including soft magnetic steel sheets stacked together, in which a part or the entirety of the soft magnetic steel sheets is formed of the magnetic material which includes body-centered tetragonal (bct) crystal including iron and nitrogen and has a molar ratio of iron to nitrogen in the crystal exceeds 8.

    MAGNETIC CORE
    3.
    发明公开
    MAGNETIC CORE 审中-公开

    公开(公告)号：US20240170196A1

    公开(公告)日：2024-05-23

    申请号：US18521221

    申请日：2023-11-28

    申请人： NIPPON STEEL CORPORATION

    发明人： Takahito MIZUMURA ,  Masato MIZOKAMI ,  Fumiaki TAKAHASHI ,  Hisashi MOGI

    IPC分类号： H01F27/245 ,  H01F1/16 ,  H01F3/02 ,  H01F41/02

    CPC分类号： H01F27/245 ,  H01F1/16 ,  H01F3/02 ,  H01F41/0233

    摘要： When joining end faces of a plurality of soft magnetic sheets which are superposed in the sheet thickness direction and which are bent at parts forming corner areas of a core, offset of positions of the end faces from the desired positions is suppressed.
    In a region of a window part comprised of a region inside of a first part 110 and second part 120, a third part 130 with a length in a longitudinal direction (X-axial direction) the same as a length in the X-axial direction of the window part at the position where the third part 130 is arranged is arranged so as to contact the region of the inner circumferential surface between the first corner area 101 and third corner area 103.

    Iron core for transformer
    6.
    发明授权
    Iron core for transformer 有权

    公开(公告)号：US11961647B2

    公开(公告)日：2024-04-16

    申请号：US17041442

    申请日：2019-03-29

    申请人： JFE STEEL CORPORATION

    发明人： Takeshi Omura ,  Hirotaka Inoue ,  Seiji Okabe

    IPC分类号： H01F1/16 ,  C21D6/00 ,  C21D8/12 ,  H01F27/245

    CPC分类号： H01F1/16 ,  C21D6/008 ,  C21D8/12 ,  H01F27/245 ,  C21D2201/05 ,  Y10T428/32

    摘要： 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; (2) has an area ratio R0 of 0.10% to 3.0%, the area ratio R0 being defined as a ratio of S0 to S; and (3) has an area ratio R1a of 50% or more, the area ratio R1a being defined as a ratio of S1a to S1.

    Method for fabricating a substantially equiatomic FeCo-alloy cold-rolled strip or sheet, and magnetic part cut from same
    7.
    发明公开
    Method for fabricating a substantially equiatomic FeCo-alloy cold-rolled strip or sheet, and magnetic part cut from same 审中-公开

    公开(公告)号：US20240035139A1

    公开(公告)日：2024-02-01

    申请号：US18265623

    申请日：2020-12-09

    申请人： APERAM

    发明人： Thierry Waeckerle ,  Rémy Batonnet

    IPC分类号： C22F1/16 ,  C22C30/02 ,  C22F1/02 ,  C22F1/00 ,  H01F1/16

    CPC分类号： C22F1/16 ,  C22C30/02 ,  C22F1/02 ,  C22F1/002 ,  H01F1/16 ,  C22C2202/02

    摘要： The invention relates to a substantially equiatomic FeCo-alloy cold-rolled strip or sheet, and to a magnetic part cut from same, as well as to a method for fabricating a Fe—Co-alloy cold-rolled strip or sheet. A fully recrystallized hot-rolled sheet or strip is prepared, with a thickness of 1.5-2.5 mm and the following composition: 47.0%≤Co≤51.0%; traces≤V+W≤3.0%; traces≤Ta+Zr≤0.5%; traces≤Nb≤0.5%; traces≤B≤0.05%; traces≤Si≤3.0%; traces≤Cr≤3.0%; traces≤Ni≤5.0%; traces≤Mn≤2.0%; traces≤O≤0.03%; traces≤N≤0.03%; traces≤S≤0.005%; traces≤P≤0.015; traces≤Mo≤0.3%; traces≤Cu≤0.5%; traces≤Al≤0.01%; traces≤Ti≤0.01%; traces≤Ca+Mg≤0.05%; traces≤rare earths≤500 ppm; the remainder being iron and impurities. A first cold-rolling step is carried out with a reduction rate of 70 to 90%, to bring the strip or sheet to a thickness of ≤1 mm. Intermediate annealing is carried out when running, leading to a partial recrystallization of the strip or sheet, running at a speed (V), and where its temperature, in the useful zone of the furnace of useful length (Lu), is between Trc and 900° C., the strip or sheet remaining therein for 15 s to 5 min at a temperature (T) such that 26° C.·min≤T−Trc)·Lu/V≤160° C. min. The strip or sheet is cooled to at least 600° C./hour. A second step of cold-rolling the annealed strip or sheet is carried out, with a reduction rate of 60 to 80%, to bring the strip or sheet to a thickness of 0.05 to 0.25 mm. And final annealing (Rf) of the cold-rolled strip or sheet is carried out to achieve complete recrystallization followed by cooling at 100 to 500° C./hour.
    Magnetic part, such as a magnetic core, obtained from a strip or sheet manufactured by this method.

    High frequency magnetic films, method of manufacture, and uses thereof
    9.
    发明授权
    High frequency magnetic films, method of manufacture, and uses thereof 有权

    公开(公告)号：US11682509B2

    公开(公告)日：2023-06-20

    申请号：US16676736

    申请日：2019-11-07

    申请人： ROGERS CORPORATION

    发明人： Yajie Chen ,  Xiaoyu Zhang ,  Li Zhang ,  Yuanyuan Xing

    IPC分类号： H01F1/16 ,  H01F1/38 ,  H01F41/18 ,  H01F41/32

    CPC分类号： H01F1/16 ,  H01F1/38 ,  H01F41/18 ,  H01F41/32 ,  Y10T428/32

    摘要： A multilayer film includes a substrate; a first magnetic layer disposed on the substrate and a second magnetic layer disposed on the first magnetic layer. The first magnetic layer includes Fe(50-80)N(10-20)B(1-20)M(0-10), wherein M is Si, Ta, Zr, Ti, Co, or a combination thereof. The second magnetic layer includes Fe(50-90)N(10-50) or Fe(60-90)N(1-10)Ta(5-30). The multilayer magnetic film has, over a frequency range of 50 MHz to 10 GHz, a magnetic permeability of greater than or equal to 1800 over a selected frequency band in the frequency range; a magnetic loss tangent of less than or equal to 0.3 over a selected frequency band in the frequency range; and a cutoff frequency of greater than or equal to 1 GHz, or greater than or equal to 2 GHz.