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公开(公告)号：US20240154472A1
公开(公告)日：2024-05-09
申请号：US18278761
申请日：2022-03-30
发明人： Tesshu MURAKAWA , Yoshiaki NATORI
IPC分类号： H02K1/02 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/147 , H01F41/02
CPC分类号： H02K1/02 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1277 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/14783 , H01F41/02 , C22C2202/02
摘要： The rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which at least one of the following conditions 1 and 2 is satisfied.
Condition 1: a thermal conductivity A of a non-oriented electrical steel sheet that is used for a core of the stator is in a range of 12 to 35 W/(m·K), a thermal conductivity B of a non-oriented electrical steel sheet that is used for a core of the rotor is in a range of 10 to 33 W/(m·K), and both the thermal conductivities have a relationship of an expression (1) of A>B
Condition 2: a thermal diffusivity A1 of the non-oriented electrical steel sheet that is used for the core of the stator is in a range of 3.0×10−6 to 9.0×10−6 m2/sW/(m·K), a thermal diffusivity B1 of the non-oriented electrical steel sheet that is used for the core of the rotor is in a range of 2.5×10−6 to 8.5×10−6 m2/sW/(m·K), and both the thermal diffusivities have a relationship of an expression (3) of A1>B1-
公开(公告)号：US20220384085A1
公开(公告)日：2022-12-01
申请号：US17774771
申请日：2020-11-13
发明人： Ryu HIRAYAMA , Tesshu MURAKAWA , Miho TOMITA
IPC分类号： H01F27/245 , H01F1/147 , H01F41/02
摘要： A laminated core (100) 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.
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公开(公告)号：US20240356417A1
公开(公告)日：2024-10-24
申请号：US18653758
申请日：2024-05-02
发明人： Tesshu MURAKAWA , Yoshiaki NATORI
CPC分类号： H02K15/02 , C21D9/46 , H02K1/02 , H02K2213/03
摘要： A rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which a {111} orientation intensity (A) of a core material of the stator is in a range of 2 to 30, a {111} orientation intensity (B) of a core material of the rotor is in a range of 1 to 15, and both the orientation intensities satisfy a relationship of an expression (1) A>B.
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公开(公告)号：US20220407371A1
公开(公告)日：2022-12-22
申请号：US17776441
申请日：2020-11-13
发明人： Yasuo OHSUGI , Miho TOMITA , Tesshu MURAKAWA
IPC分类号： H02K1/16 , H02K1/02 , C22C38/16 , C22C38/10 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , G06F30/36
摘要： The present invention is a stator core having a plurality of laminated electrical steel sheets, in which, among a plurality of teeth (121a to 121p) of the stator core, a width of teeth along a direction in which magnetic characteristics are excellent may be narrower than a width of teeth along a direction in which the magnetic characteristics are poor.
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公开(公告)号：US20220396846A1
公开(公告)日：2022-12-15
申请号：US17641628
申请日：2020-11-13
发明人： Tesshu MURAKAWA , Hiroshi FUJIMURA
IPC分类号： C21D9/46 , C22C38/16 , C22C38/10 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
摘要： A method for manufacturing a non-oriented electrical steel sheet includes a step of performing hot rolling on a steel material having a predetermined chemical composition, a step of performing first cold rolling, a step of performing process annealing, a step of performing second cold rolling, and a step of performing any one or both of final annealing and stress relief annealing. A final pass of finish rolling is performed in a temperature range equal to or higher than an Ar1 temperature, the steel sheet is held for 2 hours or less in a temperature range lower than an Ac1 temperature in the final annealing, and the steel sheet is held for 1200 sec or more in a temperature range equal to or higher than 600° C. and lower than the Ac1 temperature in the stress relief annealing.
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公开(公告)号：US20240047106A1
公开(公告)日：2024-02-08
申请号：US18274385
申请日：2022-03-31
发明人： Minako FUKUCHI , Yoshiaki NATORI , Tesshu MURAKAWA
IPC分类号： H01F1/147 , C22C38/16 , C22C38/60 , C22C38/14 , C22C38/10 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/46 , C21D8/12 , C21D6/00 , C21D1/74
CPC分类号： H01F1/14775 , C22C38/16 , C22C38/60 , C22C38/14 , C22C38/10 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/008 , C22C38/004 , C22C38/002 , C22C38/001 , C21D9/46 , C21D8/1222 , C21D8/1261 , C21D8/1233 , C21D8/1277 , C21D6/001 , C21D6/005 , C21D6/007 , C21D6/008 , C21D1/74 , C22C2202/02
摘要： A non-oriented electrical steel sheet of the present invention has a chemical composition capable of causing α-γ transformation, and contains 0.0005% to 0.0050% of Ti, in which, in a case where an area ratio of grains having a crystal orientation of an {hkl} orientation (within a tolerance of 10°) when measured by EBSD is denoted as Ahkl-uvw, A411-011 is 15.0% or more, and the non-oriented electrical steel sheet has an average grain size of 10.0 μm to 40.0 μm.
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公开(公告)号：US20240047105A1
公开(公告)日：2024-02-08
申请号：US17769272
申请日：2020-11-13
发明人： Tesshu MURAKAWA , Miho TOMITA , Hiroshi FUJIMURA , Satoshi KANO
IPC分类号： H01F1/147 , C22C38/16 , C22C38/60 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/10 , C21D9/46 , C21D8/12 , C21D1/30 , C21D6/00
CPC分类号： H01F1/14775 , C22C38/16 , C22C38/60 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/004 , C22C38/002 , C22C38/001 , C22C38/10 , C21D9/46 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1277 , C21D1/30 , C21D6/005 , C21D6/007 , C21D6/008 , C22C2202/02
摘要： What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less and one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total with a remainder including Fe and impurities, in which a recrystallization rate is 1% to 99% in a metallographic structure, a sheet thickness is 0.50 mm or less, and, in the case of measuring a magnetic flux density B50 after annealing the non-oriented electrical steel sheet at 800° C. for two hours, a magnetic flux density B50 in a 45° direction with respect to a rolling direction is 1.75 T or more.
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公开(公告)号：US20240035130A1
公开(公告)日：2024-02-01
申请号：US18279161
申请日：2022-03-31
发明人： Minako FUKUCHI , Yoshiaki NATORI , Tesshu MURAKAWA
CPC分类号： C22C38/02 , C22C38/004 , C22C38/06
摘要： A non-oriented electrical steel sheet according to the present invention has a chemical composition in which α-γ transformation can occur and which contains at least, in terms of mass %, at most 0.010% of C, 1.50% to 4.00% of Si, 0.0001% to 1.0% of sol. Al, at most 0.010% of S, at most 0.010% of N, and a total of 2.50% to 5.00% of at least one selected from the group consisting of Mn, Ni, and Cu, with the balance including Fe and impurities, wherein when an average grain size of {411} crystal grains is defined as d411 and an average grain size of {111} crystal grains is defined as d111, d411/d111≥1.10.
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公开(公告)号：US20230353023A1
公开(公告)日：2023-11-02
申请号：US18038949
申请日：2022-03-30
发明人： Tesshu MURAKAWA , Yoshiaki NATORI
CPC分类号： H02K15/02 , H02K1/02 , H02K2213/03
摘要： A rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which a {111} orientation intensity (A) of a core material of the stator is in a range of 2 to 30, a {111} orientation intensity (B) of a core material of the rotor is in a range of 1 to 15, and both the orientation intensities satisfy a relationship of an expression (1) A>B.
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公开(公告)号：US20220154304A1
公开(公告)日：2022-05-19
申请号：US17437703
申请日：2019-03-20
IPC分类号： C21D9/46 , C22C38/16 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C23G1/08 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
摘要： A non oriented electrical steel sheet consists of a silicon steel sheet and an insulation coating. The silicon steel sheet includes an internally oxidized layer containing SiO2 in a surface thereof, an average thickness of the internally oxidized layer is 0.10 to 5.0 μm, and a vickers hardness in the internally oxidized layer is 1.15 to 1.5 times as compared with a vickers hardness in a thickness central area.
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