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公开(公告)号：US20220145472A1
公开(公告)日：2022-05-12
申请号：US17434983
申请日：2020-03-25
发明人： Fumiaki TAKAHASHI
摘要： A coating agent for forming a grain-oriented electrical steel sheet coating able to form an aluminum borate coating high in adhesion and large in tension and a method for manufacturing the grain-oriented electrical steel sheet are provided. The coating agent for forming a grain-oriented electrical steel sheet coating of the present invention comprises an aluminum source containing aluminum oxide and/or an aluminum oxide precursor compound, a boron source containing a borate of an alkali metal, and silicon oxide and/or a silicon oxide precursor in an amount, converted to silicon oxide, of 5 mass % or more and 10 mass % or less with respect to a total solids concentration of the aluminum source and boron source, the aluminum source and the boron source contained so that, by molar ratio, Al/B: 0.5 to 2.0, a solids concentration of a total of the aluminum source and the boron source being 20 mass % or more and 38 mass % or less, and pH being 2.0 or more and 6.0 or less.
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公开(公告)号：US20210082606A1
公开(公告)日：2021-03-18
申请号：US16772544
申请日：2019-01-31
摘要： A grain-oriented electrical steel sheet according to the present invention has a steel sheet surface provided with grooves and includes two or more broken lines including the grooves having a length of 5 to 10 mm on a straight line intersecting a rolling direction on the steel sheet surface. In each of the broken lines including the grooves, the grooves are arranged at equal intervals, and a ratio of the length of the groove to a length of a non-groove is in a range of 1:1 to 1.5:1.
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公开(公告)号：US20210327631A1
公开(公告)日：2021-10-21
申请号：US17273142
申请日：2019-10-03
IPC分类号： H01F27/245 , H01F41/02
摘要： The present invention provides a magnetic core and transformer which are reduced in core loss.
The magnetic core according to the present invention comprises a core member which is formed by winding first electrical steel sheets, which is ring shaped seen from a side surface, and which has one or more bent parts seen from a side surface and one or more stacks of second electrical steel sheets stacked together, each the stack being arranged at least at one of the surfaces formed by side surfaces of the first electrical steel sheets at a bent part of the core member so that a surface formed by side surfaces of the second electrical steel sheets runs along it.-
公开(公告)号：US20210319943A1
公开(公告)日：2021-10-14
申请号：US17282291
申请日：2019-10-02
IPC分类号： H01F27/245 , H01F1/16 , H01F41/02
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.-
公开(公告)号：US20220106658A1
公开(公告)日：2022-04-07
申请号：US17421850
申请日：2020-01-16
发明人： Yoshiyuki USHIGAMI , Shinji YAMAMOTO , Fumiaki TAKAHASHI , Hideyuki HAMAMURA , Shinsuke TAKATANI , Masaru TAKAHASHI
摘要： The grain-oriented electrical steel sheet according to the present invention is a grain-oriented electrical steel sheet having a base steel sheet (1), an intermediate layer (4) disposed to be in contact with the base steel sheet (1), and an insulation coating (3) disposed to be in contact with the intermediate layer (4), and the grain-oriented electrical steel sheet includes a surface of the base steel sheet (1) having a groove (G) which extends in a direction intersecting a rolling direction of the base steel sheet (1), in which in a cross-sectional view of a plane parallel to the rolling direction and a sheet thickness direction of the base steel sheet (1), when a region between end portions of the groove (G) is defined as a groove part (RG), an average thickness of the intermediate layer (4) of the groove part (RG) is 0.5 times or more and 3.0 times or less an average thickness of the intermediate layer (4) other than the groove part (RG), and an area ratio of voids in the insulation coating (3) of the groove part (RG) is 15% or less.
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公开(公告)号：US20240170196A1
公开(公告)日：2024-05-23
申请号：US18521221
申请日：2023-11-28
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.-
公开(公告)号：US20220199320A1
公开(公告)日：2022-06-23
申请号：US17605961
申请日：2020-04-27
IPC分类号： H01F41/02 , H01F27/245
摘要： Provided is a wound core formed by laminating a plurality of bent bodies obtained by forming a coated grain-oriented electrical steel sheet in which a coating is formed on at least one surface of a grain-oriented electrical steel sheet so that the coating is on an outside, in a sheet thickness direction, in which the bent body has a bent region obtained by bending the coated grain-oriented electrical steel sheet and a flat region adjacent to the bent region, the number of deformation twins present in the bent region in a side view is five or less per 1 mm of a length of a center line in the sheet thickness direction in the bent region, and when a region extending 40 times a sheet thickness to both sides in a circumferential direction from a center of the bent region on an outer circumferential surface of the bent body is defined as a strain affected region, a proportion of an area where the coating is not damaged at any position along the circumferential direction in a flat region within the strain affected region is 90% or more.
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公开(公告)号：US20220056585A1
公开(公告)日：2022-02-24
申请号：US17421164
申请日：2020-01-08
发明人： Fumiaki TAKAHASHI
摘要： Grain-oriented electrical steel sheet having an aluminum borate coating able to impart larger tension that the past and a method for manufacturing grain-oriented electrical steel sheet are formed. The grain-oriented electrical steel sheet according to the present invention has a steel sheet and an insulating coating formed on the steel sheet and containing aluminum and boron, where the oxides contain crystalline oxides and a maximum value of an emission intensity ratio of boron with respect to aluminum at an interface between the insulating coating and the steel sheet, analyzed by glow discharge optical emission spectrometry, is 2.5 times or more and 4.0 times or less of the emission intensity ratio of boron with respect to aluminum in the insulating coating.
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