WO2022092101A1 - 巻鉄心、巻鉄心の製造方法及び巻鉄心製造装置 - Google Patents
巻鉄心、巻鉄心の製造方法及び巻鉄心製造装置 Download PDFInfo
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- WO2022092101A1 WO2022092101A1 PCT/JP2021/039530 JP2021039530W WO2022092101A1 WO 2022092101 A1 WO2022092101 A1 WO 2022092101A1 JP 2021039530 W JP2021039530 W JP 2021039530W WO 2022092101 A1 WO2022092101 A1 WO 2022092101A1
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000004519 manufacturing process Methods 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 192
- 239000010959 steel Substances 0.000 claims abstract description 192
- 230000003746 surface roughness Effects 0.000 claims abstract description 63
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 claims description 155
- 238000004804 winding Methods 0.000 claims description 47
- 238000005452 bending Methods 0.000 claims description 28
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 11
- 238000003475 lamination Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000000137 annealing Methods 0.000 description 7
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- 229910000576 Laminated steel Inorganic materials 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
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- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
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- HJUFTIJOISQSKQ-UHFFFAOYSA-N fenoxycarb Chemical compound C1=CC(OCCNC(=O)OCC)=CC=C1OC1=CC=CC=C1 HJUFTIJOISQSKQ-UHFFFAOYSA-N 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
- H01F27/2455—Magnetic cores made from sheets, e.g. grain-oriented using bent laminations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/02—Cores, Yokes, or armatures made from sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/04—Cores, Yokes, or armatures made from strips or ribbons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
- H01F41/024—Manufacturing of magnetic circuits made from deformed sheets
Definitions
- the present invention relates to a wound core, a method for manufacturing a wound core, and a wound core manufacturing apparatus.
- the present application claims priority based on Japanese Patent Application No. 2020-178565 filed in Japan on October 26, 2020, the contents of which are incorporated herein by reference.
- the wound steel core is generally manufactured by stacking grain-oriented electrical steel sheets in layers, winding them in a donut shape (winding shape), and then pressurizing the wound body to form a substantially square shape.
- the wound steel core manufactured in this way may be referred to as a trancocoa).
- This forming process causes mechanical processing strain (plastic deformation strain) to be applied to the entire grain-oriented electrical steel sheet, and the processing strain causes the iron loss of the grain-oriented electrical steel sheet to be significantly deteriorated. Therefore, it is necessary to perform strain relief annealing. be.
- the steel plate portion that becomes the corner portion of the wound iron core is bent in advance so that a relatively small bent region having a radius of curvature of 3 mm or less is formed, and the bent steel plate is formed.
- Techniques such as those in Patent Documents 1 to 3 are disclosed in which the wound steel cores are laminated with each other (in the present specification, the wound steel cores manufactured in this manner may be referred to as Unicore (registered trademark). ).
- Unicore registered trademark
- the manufacturing method a large-scale forming process as in the conventional case is not required, the steel sheet is precisely bent to maintain the iron core shape, and the processing strain is concentrated only on the bent portion (corner portion). It is also possible to omit distortion removal, and the industrial merit is greatly being applied.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wound core, a method for manufacturing the wound core, and a wound core manufacturing apparatus capable of reducing the temperature rise of the iron core and the winding.
- the present invention has a portion in which directional electromagnetic steel plates having a rectangular hollow portion in the center and having flat portions and bent portions alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It is a wound core including a wound core, which is formed by stacking individually bent directional electromagnetic steel plates in layers and assembling them into a wound shape, and is formed through at least one joint for each winding.
- a wound core including a wound core, which is formed by stacking individually bent directional electromagnetic steel plates in layers and assembling them into a wound shape, and is formed through at least one joint for each winding.
- the directional electromagnetic steel plates laminated in an L cross section parallel to the longitudinal direction which is a cross section along the thickness direction of the directional electromagnetic steel plates in a wound iron core in which a plurality of directional electromagnetic steel plates are connected to each other.
- Ral is the surface roughness of the steel plate portion along the straight line connecting an arbitrary point on the directional electromagnetic steel plate located on the innermost circumference of the winding shape and an arbitrary point on the directional electromagnetic steel plate located on the outermost circumference.
- Rh be the surface roughness of the steel plate portion along the straight line connecting arbitrary points on the end face along the plate thickness direction parallel to the longitudinal direction in any one of the laminated electromagnetic steel plates.
- the ratio Ral / Rac is characterized by satisfying the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0. It should be noted that the "L cross section parallel to the longitudinal direction, which is a cross section along the thickness direction of the directional electromagnetic steel plate" is not the surface after cutting the wound iron core, but along the thickness direction of the directional electromagnetic steel plate.
- the surface roughness Ral is the center in the sheet thickness direction of the grain-oriented electrical steel sheet located at the innermost circumference of the wound steel core among the grain-oriented electrical steel sheets laminated along the plate thickness direction of the grain-oriented electrical steel sheet.
- the surface roughness of the steel sheet portion along the direction connecting the center in the plate thickness direction of the grain-oriented electrical steel sheet located on the outer periphery may be used.
- the surface roughness Rac may be Rac, which is the surface roughness of the grain-oriented electrical steel sheet in the direction parallel to the longitudinal direction on the end surface of the flat surface portion of the grain-oriented electrical steel sheet.
- the present inventors Based on the fact that the heat generated at the end face when a transformer is manufactured with Unicore makes it difficult to control the temperature of the iron core and windings despite immersion in oil, the present inventors have approximately the same winding core volume. Focusing on the fact that if the surface area of the L cross section of the wound steel core can be increased, the contact area with oil or air can be increased, thereby increasing the cooling efficiency, the steel cores are stacked so as to form one corresponding layer. One or more of the grain-oriented electrical steel sheets are assembled so as to be displaced in the width direction orthogonal to the longitudinal direction with respect to the grain-oriented electrical steel sheets forming the other layer over the entire length in the longitudinal direction.
- the L cross section of the rolled iron core means not the surface cut from the wound steel core, but the end surface of the wound steel core along the plate thickness direction of the grain-oriented electrical steel sheet and parallel to the longitudinal direction of the grain-oriented electrical steel sheet.
- the surface roughness Ral is, for example, the grain-oriented electrical steel sheet located at the center and the outermost periphery in the grain thickness direction of the grain-oriented electrical steel sheet located at the innermost circumference along the grain thickness direction of the grain-oriented electrical steel sheet.
- the surface roughness of the steel plate portion along the direction connecting to the center of the plate thickness may be set.
- the surface roughness ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0, so that the temperatures of the iron core and the winding are high. The rise can be effectively reduced.
- the direction of the straight line connecting an arbitrary point on the grain-oriented electrical steel sheet located on the innermost circumference and an arbitrary point on the grain-oriented electrical steel sheet located on the outermost circumference can be arbitrarily set.
- it is located at the center in the thickness direction of the grain-oriented electrical steel sheet located at the innermost circumference of the wound steel core among the grain-oriented electrical steel sheets laminated along the plate thickness direction of the grain-oriented electrical steel sheet, and at the outermost periphery. It is preferable that the direction is such that it connects to the center in the plate thickness direction of the grain-oriented electrical steel sheet.
- the number of grain-oriented electrical steel sheets to be shifted in the width direction is arbitrary, and as an embodiment of shifting the grain-oriented electrical steel sheets in the width direction, for example. , It is conceivable to shift the grain-oriented electrical steel sheets irregularly or regularly along the laminating direction. When shifting regularly, there are various modes such as shifting the grain-oriented electrical steel sheets alternately between adjacent layers, shifting every two layers, shifting every three layers, and so on. Conceivable.
- a guide is provided to guide the grain-oriented electrical steel sheet in the longitudinal direction while defining the positions of both ends in the width direction of the grain-oriented electrical steel sheet, and the position of the guide is set.
- a method of shifting the grain-oriented electrical steel sheet in the width direction by changing the steel sheet can be considered, but the method is not limited to this.
- the surface roughness can be calculated based on, for example, the arithmetic mean roughness Ra defined in the Japanese Industrial Standards JIS B0601 (2013).
- the present invention has a wound hollow portion having a rectangular hollow portion in the center, and includes a wound portion in which directional electromagnetic steel plates in which flat portions and bent portions are alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It is an iron core and is formed by stacking the directional electromagnetic steel plates individually bent in layers and assembling them into a wound shape, and a plurality of directional electromagnetic plates are formed through at least one joint for each winding. In the method of manufacturing a wound iron core in which steel plates are connected to each other, one or more of the above-mentioned directional electromagnetic steel plates stacked so as to form one corresponding layer are provided over the entire length in the longitudinal direction thereof.
- the directional electromagnetic steel plates are stacked and stacked so as to form one layer of the wound core of the present disclosure so that the ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0.
- One or more of the directional electromagnetic steel sheets shall be displaced in the width direction orthogonal to the longitudinal direction of the directional electromagnetic steel sheets with respect to the directional electromagnetic steel sheets forming the other layer over the entire length in the longitudinal direction thereof. It may be a manufacturing method characterized by assembling.
- a bending portion for individually bending a directional electromagnetic steel plate and each directional electromagnetic steel plate individually bent by the bending portion are stacked in layers and assembled into a wound shape.
- a plurality of directional electromagnetic steel plates are connected to each other via at least one joint for each winding, and directional electromagnetic steel plates in which flat portions and bent portions are alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It comprises an assembly portion that forms a wound core having a rectangular hollow portion in the center including the portion, wherein the assembly portions are stacked so as to form one corresponding layer.
- One or more of the directional electromagnetic steel plates are assembled so as to be displaced in the width direction orthogonal to the longitudinal direction with respect to the directional electromagnetic steel plates forming the other layer over the entire length in the longitudinal direction.
- the directional electromagnetic steel plate located on the innermost circumference of the wound shape among the laminated directional electromagnetic steel plates.
- Ral is the surface roughness of the steel plate portion along the straight line connecting any point in the directional electromagnetic steel plate located at the outermost periphery, and any one of the directional electromagnetic steel plates to be laminated.
- the ratio Ral / Rac is 1.5 ⁇ Ral /.
- a guide for guiding the directional electromagnetic steel plate in the longitudinal direction while defining the positions of both ends in the width direction of the directional electromagnetic steel plate is provided so as to satisfy the relationship of Rac ⁇ 12.0, and the position of the guide is changed. Further provided is a wound iron core manufacturing apparatus characterized in that the directional electromagnetic steel plate is displaced in the width direction.
- the above-mentioned electrical steel core manufacturing equipment is formed by stacking a bending section for individually bending grain-oriented electrical steel sheets and each grain-oriented electrical steel sheets individually bent by the bending section in layers and assembling them into a wound shape.
- a plurality of grain-oriented electrical steel sheets are connected to each other via at least one joint for each roll, and grain-oriented electrical steel sheets in which flat surfaces and bent portions are alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It comprises an assembling portion, which forms a wound core having a rectangular hollow portion in the center including the provided portions, and the assembling portion defines the positions of both ends in the width direction of the grain-oriented electrical steel sheet.
- a guide is provided to guide the grain-oriented electrical steel sheet in the longitudinal direction, and the assembling portion is provided at the end face of the winding iron core along the plate thickness direction of the grain-oriented electrical steel sheet and parallel to the longitudinal direction of the grain-oriented electrical steel sheet.
- the center in the plate thickness direction of the grain-oriented electrical steel sheet located at the innermost circumference of the wound steel core, Ral is the surface roughness of the steel plate portion along the direction connecting the center in the plate thickness direction of the directional electromagnetic steel plate located at the outermost periphery of the wound iron core, and the flat surface portion of the directional electromagnetic steel plate to be laminated.
- the ratio Ral / Rac of the Ral to the Rac is 1.5 ⁇ Ral / Rac ⁇ 12.
- the surface roughness ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0 as in the above-mentioned wound core. Therefore, the temperature rise of the iron core and the winding can be effectively reduced.
- the surface roughness ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0, the temperature rise of the iron core and the winding can be effectively reduced. Can be done.
- FIG. 1 It is a perspective view which shows typically the winding iron core which concerns on one Embodiment of this invention. It is a side view of the winding iron core shown in the embodiment of FIG. It is a side view which shows typically the winding core which concerns on other embodiment of this invention. It is a side view schematically showing an example of the one-layer grain-oriented electrical steel sheet constituting the winding iron core. It is a side view schematically showing another example of the one-layer grain-oriented electrical steel sheet constituting the wound steel core. It is a side view schematically showing an example of the bent part of the grain-oriented electrical steel sheet constituting the winding iron core of this invention.
- (A) is a vertical end view showing an example of setting a straight line defining the surface roughness Ral of the end face of the laminated structure of the rolled iron core in which the grain-oriented electrical steel sheets are laminated, and (b) is an arbitrary of the grain-oriented electrical steel sheets.
- It is a side end view which shows the setting example of the straight line which is parallel to the longitudinal direction, and also defines the surface roughness Rac in the end surface along the plate thickness direction in one piece.
- It is a cross-sectional view (the end view of the cut portion along the line AA of FIG. 1) that is parallel to the width direction of the laminated structure of the wound steel core formed by laminating the grain-oriented electrical steel sheets and is along the plate thickness direction.
- FIG. 9 is a perspective view of the manufacturing apparatus of FIG. 9, which schematically shows an assembled portion provided with a guide for shifting the grain-oriented electrical steel sheet supplied from the bent portion in the width direction. It is a schematic diagram which shows the dimension of the winding iron core manufactured at the time of characteristic evaluation.
- the wound core according to the embodiment of the present invention will be described in detail in order.
- the numerical limit range described below includes the lower limit value and the upper limit value. Numerical values indicated as “greater than” or “less than” are not included in the numerical range.
- “%” regarding the chemical composition means “mass%” unless otherwise specified.
- terms such as “parallel”, “vertical”, “identical”, “right angle”, and values of length and angle, etc., which specify the shape and geometric conditions and their degrees, are used.
- the “oriented electrical steel sheet” may be simply referred to as “steel sheet” or “electrical steel sheet”, and the “rolled iron core” may be simply referred to as “iron core”.
- the wound steel core according to an embodiment of the present invention is a wound steel core having a substantially rectangular wound core body in a side view, and the wound core body has flat surfaces and bent portions alternately continuous in the longitudinal direction.
- the grain-oriented electrical steel sheets include portions stacked in the plate thickness direction, and have a substantially polygonal laminated structure in a side view.
- the flat surface portion refers to a straight line portion other than the bent portion.
- the grain-oriented electrical steel sheet contains Si: 2.0 to 7.0% in mass%, has a chemical composition in which the balance is composed of Fe and impurities, and has an aggregate structure oriented in the Goss direction. Have.
- the grain-oriented electrical steel sheet for example, the grain-oriented electrical steel strip described in JIS C 2553: 2019 can be adopted.
- FIG. 1 is a perspective view schematically showing an embodiment of a wound iron core.
- FIG. 2 is a side view of the wound iron core shown in the embodiment of FIG.
- FIG. 3 is a side view schematically showing another embodiment of the wound iron core.
- the side view means to view in the width direction (Y-axis direction in FIG. 1) of the elongated grain-oriented electrical steel sheet constituting the wound steel core.
- the side view is a view showing a shape visually recognizable by side view (a view in the Y-axis direction of FIG. 1).
- the wound core according to the embodiment of the present invention includes a wound core body having a substantially polygonal shape in a side view.
- the rolled iron core main body 10 has a laminated structure in which grain-oriented electrical steel sheets 1 are stacked in the plate thickness direction and have a substantially rectangular shape in a side view.
- the wound core body 10 may be used as it is as a wound core, or a known fastener such as a binding band or the like for integrally fixing a plurality of stacked grain-oriented electrical steel sheets as needed. May be provided.
- the surface roughness which will be described later, is the value measured for the main body of the wound iron core excluding the binding band and the like.
- the length of the core of the wound core body 10 there is no particular limitation on the length of the core of the wound core body 10. If the number of bent portions 5 is the same, even if the core length of the wound iron core body 10 changes, the volume of the bent portions 5 is constant, so that the iron loss generated in the bent portions 5 is constant. The longer the iron core length, the smaller the volume fraction of the bent portion 5 with respect to the wound iron core main body 10, and therefore the influence on the deterioration of iron loss is small. Therefore, it is preferable that the core length of the wound core body 10 is long.
- the core length of the wound core body 10 is preferably 1.5 m or more, and more preferably 1.7 m or more.
- the core length of the wound core body 10 means the peripheral length at the center point in the stacking direction of the wound core body 10 from the side view.
- Such a wound iron core can be suitably used for any conventionally known application.
- the iron core according to the present embodiment is characterized in that it has a substantially polygonal shape in a side view.
- a substantially rectangular (quadrangular) iron core which is also a general shape, will be described, but the angle and number of the bent portions 5 and the length of the flat portion 5 will be described.
- iron cores of various shapes can be manufactured. For example, if the angles of all the bent portions 5 are 45 ° and the lengths of the flat portions 4 are equal, the side view becomes octagonal. Further, if the angle is 60 ° and the six bent portions 5 are provided, and the lengths of the flat surface portions 4 are equal, the side view becomes hexagonal. As shown in FIGS.
- the wound steel core main body 10 is a portion in which the grain-oriented electrical steel sheets 1 in which the flat surface portions 4 and 4a and the bent portions 5 are alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It has a substantially rectangular laminated structure 2 having a hollow portion 15 in a side view.
- the corner portion 3 including the bent portion 5 has two or more bent portions 5 having a curved shape in a side view, and is the total of the bending angles of the bent portions 5 existing in one corner portion 3. Is, for example, 90 °.
- the corner portion 3 has a flat surface portion 4a shorter than the flat surface portion 4 between the adjacent bent portions 5 and 5. Therefore, the corner portion 3 has a form having two or more bent portions 5 and one or more flat portions 4a.
- one bent portion 5 is 45 °.
- one bent portion 5 is 30 °.
- the wound core of the present embodiment can be composed of bent portions 5 having various angles, but from the viewpoint of suppressing the generation of strain due to deformation during machining and suppressing iron loss,
- the bending angle ⁇ ( ⁇ 1, ⁇ 2, ⁇ 3) of the bent portion 5 is preferably 60 ° or less, and more preferably 45 ° or less.
- the bending angles are the same, and if the iron loss of the iron core created by the iron loss of the steel sheet used can be reduced by reducing the number of deformation points above a certain level, a combination of different angles It may be processed as.
- the design can be arbitrarily selected from the important points in iron core processing.
- FIG. 6 is a diagram schematically showing an example of a bent portion (curved portion) 5 of the grain-oriented electrical steel sheet 1.
- the bending angle of the bent portion 5 means an angle difference between the straight portion on the rear side and the straight portion on the front side in the bending direction in the bent portion of the directional electromagnetic steel plate, and means the outer surface of the directional electromagnetic steel plate 1.
- it is expressed as the angle ⁇ of the complementary angle of the angle formed by the two virtual lines Lb-elongation 1 and Lb-elongation 2 obtained by extending the straight line portion which is the surface of the flat surface portions 4 and 4a on both sides of the bent portion 5.
- the point where the extending straight line separates from the surface of the steel sheet is the boundary between the flat surface portion 4 and the bent portion 5 on the surface on the outer surface side of the steel sheet, and is the point F and the point G in FIG.
- a straight line perpendicular to the outer surface of the steel sheet is extended from each of the points F and G, and the intersections with the surface on the inner surface side of the steel sheet are designated as points E and D, respectively.
- the points E and D are the boundaries between the flat surface portion 4 and the bent portion 5 on the inner surface side of the steel sheet.
- C be the intersection on the arc DE inside the bent portion of the steel plate when the points A and B are connected by a straight line.
- the bent portion 5 is a portion of the grain-oriented electrical steel sheet 1 surrounded by the points D, E, F, and G in the side view of the grain-oriented electrical steel sheet 1. In FIG.
- the surface of the steel plate between the points D and E, that is, the inner surface of the bent portion 5 is La
- the surface of the steel plate between the points F and G, that is, the outer surface of the bent portion 5 is Lb. It is shown as.
- the radius of curvature of each bent portion 5 of each grain-oriented electrical steel sheet 1 laminated in the plate thickness direction is not particularly limited.
- the method for measuring the radius of curvature r of the bent portion 5 is not particularly limited, but it can be measured by observing at 200 times using, for example, a commercially available microscope (Nikon ECLIPSE LV150). Specifically, the point A at the center of curvature is obtained from the observation results. For example, the intersection of the line segment EF and the line segment DG extended inward on the opposite side of the point B is defined as A. For example, the magnitude of the radius of curvature r corresponds to the length of the line segment AC.
- FIGS. 4 and 5 are diagrams schematically showing an example of one layer of grain-oriented electrical steel sheet 1 in the wound steel core main body 10.
- the grain-oriented electrical steel sheet 1 used in the examples of FIGS. 4 and 5 is bent in order to realize a wound core in a unicore form, and has two or more bent portions 5 and a flat surface portion 4. It has a substantially polygonal ring in a side view through a joint portion 6 (gap) which is an end face in the longitudinal direction of one or more grain-oriented electrical steel sheets 1.
- the wound iron core main body 10 may have a laminated structure having a substantially polygonal side view as a whole. As shown in the example of FIG.
- one grain-oriented electrical steel sheet constitutes one layer of the winding core body 10 via one joint portion 6 (via one joint portion 6 for each roll). (One piece of grain-oriented electrical steel sheet is connected), and as shown in the example of FIG. 5, one grain-oriented electrical steel sheet 1 constitutes about half of the winding core and two. Two grain-oriented electrical steel sheets 1 form one layer of the wound core body 10 via the joint 6 (two grain-oriented electrical steel sheets are connected to each other via two grain 6s for each roll). It may be something that is done).
- the plate thickness of the grain-oriented electrical steel sheet 1 used in the present embodiment is not particularly limited and may be appropriately selected depending on the intended use and the like, but is usually in the range of 0.15 mm to 0.35 mm. , Preferably in the range of 0.18 mm to 0.27 mm.
- the method for manufacturing the grain-oriented electrical steel sheet 1 is not particularly limited, and a conventionally known method for manufacturing grain-oriented electrical steel sheet can be appropriately selected.
- C is 0.04 to 0.1% by mass
- the slab having the chemical composition of the above-mentioned directional electromagnetic steel sheet is heated to 1000 ° C. or higher for hot rolling.
- hot-rolled sheet is annealed as necessary, and then it is made into a cold-rolled steel sheet by cold-rolling once or two or more times with intermediate annealing in between, and the cold-rolled steel sheet is, for example, in a wet hydrogen-inert gas atmosphere.
- a method of decarburizing and annealing by heating to 700 to 900 ° C., further annealing and annealing as necessary, applying an annealing separator, finishing annealing at about 1000 ° C., and forming an insulating film at about 900 ° C. can be mentioned. Further, after that, painting or the like for adjusting the dynamic friction coefficient may be carried out. Further, the effect of the present invention can be enjoyed even if the steel sheet is subjected to a process generally called "magnetic domain control" using strains and grooves by a method known in the steel sheet manufacturing process.
- the wound iron core 10 composed of the directional electromagnetic steel plate 1 having the above-described embodiment is assembled into a wound shape by stacking the individually bent directional electromagnetic steel plates 1 in layers. This is formed by the above, and a plurality of directional electromagnetic steel plates 1 are connected to each other via at least one joint portion 6 for each roll, and the longitudinal length is a cross section of the directional electromagnetic steel plate 1 along the plate thickness direction T. In the L cross section parallel to the direction L (X direction) (see (a) in FIG. 7), any of the laminated directional electromagnetic steel sheets 1 in the directional electromagnetic steel sheet 1a located at the innermost circumference of the wound shape.
- Ral is the surface roughness of the steel plate portion along the straight line L1 connecting the point P1 of the above point P1 and the arbitrary point P2 of the directional electromagnetic steel sheet 1b located on the outermost periphery, and any of the directional electromagnetic steel sheets 1 to be laminated.
- the surface roughness of the steel plate portion along the straight line L2 connecting arbitrary points P3 and P4 at the end face along the plate thickness direction T parallel to the longitudinal direction L see the side end view of FIG. 7B.
- the degree is Rac
- the ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0.
- the "L cross section parallel to the longitudinal direction L (X direction), which is a cross section along the plate thickness direction T" is not the surface after cutting the wound core 10, but the directional electromagnetic steel plate 1 of the wound core 10.
- the surface roughness Ral is the center P1a in the plate thickness direction of the grain-oriented electrical steel sheet 1a located on the innermost circumference and the grain-oriented electrical steel sheet located on the outermost periphery along the plate thickness direction T of the grain-oriented electrical steel sheet 1. It is preferable that the surface roughness of the steel plate portion along the direction L1a connecting the center P2a of the plate thickness direction T of 1b is set.
- the surface roughness Ral may be, for example, an average value of values obtained by measuring the flat surface portion 4 of the grain-oriented electrical steel sheet 1a at five locations evenly divided in the longitudinal direction. Further, regarding the surface roughness Rac, since the variation in the surface roughness in the longitudinal direction of the grain-oriented electrical steel sheet is small, any one of the grain-oriented electrical steel sheets may be selected and measured. Three of the electromagnetic steel sheets may be selected and measured, and the average of those measured values may be taken.
- the surface roughness Rac may be the surface roughness in the direction parallel to the longitudinal direction on the end surface of the flat surface portion 4 of the grain-oriented electrical steel sheet 1 (the end surface of the flat surface portion 4 parallel to the longitudinal direction).
- the grain-oriented electrical steel sheets 1 are stacked and stacked so as to form one corresponding layer (one layer of the wound steel core).
- One or more of the grain-oriented electrical steel sheets 1 to be mounted are displaced in the width direction C orthogonal to the electrical steel sheet L with respect to the grain-oriented electrical steel sheet 1 forming the other layer over the entire length of the longitudinal direction L.
- the width of the grain-oriented electrical steel sheet 1 is alternately formed between adjacent layers. It is assembled so as to be displaced in the direction C (Y direction).
- the straight line L1 for defining the surface roughness Ral may extend in parallel along the stacking direction of the grain-oriented electrical steel sheets 1, but as shown in FIG. 7A, from the vertical direction. It may be tilted. It is preferable that the straight line L1 for defining the surface roughness Ral extends in parallel along the laminating direction of the grain-oriented electrical steel sheet 1.
- the straight line L2 for defining the surface roughness Rac may extend vertically along the laminating direction of the grain-oriented electrical steel sheet 1, but is tilted from the vertical direction as shown in FIG. 7 (b). You may. It is preferable that the straight line L2 for defining the surface roughness Rac extends vertically along the laminating direction of the grain-oriented electrical steel sheet 1.
- the surface roughness Ral and Rac can be calculated based on, for example, the arithmetic mean roughness Ra defined in the Japanese Industrial Standards JIS B0601 (2013), and in particular, in the present embodiment, the winding is wound around the iron core 10.
- the surface roughness Ral, Rac In the state shown in FIG. 10 formed by winding the 75, on the upper surface (end face and L cross section) 10a of the iron core 10, for example, using a digital microscope (VHX-7000 manufactured by KEYENCE CORPORATION), the surface roughness Ral, Rac. To measure.
- the magnification is set so that the entire L end face of the outermost directional electromagnetic steel sheet 1b and the entire L end surface of the innermost directional electromagnetic steel sheet 1a are in the field of view, and the digital microscopes are linear L1 and L2.
- the measurement is performed by scanning along (see FIG. 7).
- the cutoff of the roughness curve can be appropriately set.
- the measurement magnification is preferably 100 times or more, more preferably 500 times to 700 times.
- the surface roughness Ral may be, for example, 0.6 to 14.4 ⁇ m
- the surface roughness Rac may be, for example, 0.5 to 1.2 ⁇ m.
- FIG. 9 schematically shows a winding iron core manufacturing apparatus 70 in the form of a unicore, in which the manufacturing apparatus 70 includes a bending portion 71 for individually bending a grain-oriented electrical steel sheet 1, and a bending portion 71.
- a wound steel core having a rectangular hollow portion in the center including a portion in which grain-oriented electrical steel sheets 1 in which flat surface portions 4 and bent portions 5 are alternately continuous in the longitudinal direction are stacked in the plate thickness direction is formed. It is provided with an assembly portion 72 to be formed.
- the grain-oriented electrical steel sheet 1 is supplied to the bending section 71 by feeding the grain-oriented electrical steel sheet 1 at a predetermined transport speed from the steel sheet supply section 90 that holds the hoop material formed by winding the grain-oriented electrical steel sheet 1 in a roll shape. ..
- the grain-oriented electrical steel sheet 1 supplied in this way is subjected to a bending process in which the grain-oriented electrical steel sheet 1 is appropriately cut into an appropriate size in the bending section 71 and is individually bent in small numbers, such as one sheet at a time. ..
- the assembling section 72 corresponds to each of the grain-oriented electrical steel sheets 1 so that the surface roughness ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0.
- Any one or more of the grain-oriented electrical steel sheets 1 to be stacked by stacking them so as to form one layer (one layer of the wound steel core) and changing the position of the guide 95 in the width direction can be used. It is assembled so as to be displaced in the width direction C orthogonal to the longitudinal direction L with respect to the grain-oriented electrical steel sheet 1 forming another layer over the entire length in the longitudinal direction L.
- the present embodiment as shown in FIG.
- a plurality of assembling portions 72 guide the grain-oriented electrical steel sheet 1 in the longitudinal direction L while defining the positions of both ends of the grain-oriented electrical steel sheet 1 in the width direction C.
- the guide 95 is provided on the steel plate receiving portion 97, and the position of the guide 95 is changed in the width direction C so that the grain-oriented electrical steel plate 1 supplied from the bending portion 71 is shifted in the width direction C.
- the width direction C orthogonal to the longitudinal direction with respect to the grain-oriented electrical steel sheet 1 forming another layer over the entire length in the longitudinal direction of any one or more of the stacked grain-oriented electrical steel sheets 1. It can be assembled so as to be offset by.
- the guide 95 protrudes from another position shifted in the width direction C, and the portion of the subsequent grain-oriented electrical steel sheet 1 is shifted in the width direction C.
- the present inventors manufactured iron cores a to d having the shapes shown in Table 1 and FIG. 12 using each steel plate as a material. It should be noted that L1 is the distance between the grain-oriented electrical steel sheets 1 parallel to each other on the innermost circumference of the wound steel core in the plan cross section including the central CL (distance between the planes on the inner surface side), which is parallel to the X-axis direction.
- L2 is the distance between the grain-oriented electrical steel sheets 1 parallel to the Z-axis direction and parallel to each other on the innermost circumference of the wound steel core in the vertical cross section including the central CL (distance between plane portions on the inner surface side).
- L3 is parallel to the X-axis direction and is the laminated thickness (thickness in the laminated direction) of the wound iron core in the flat cross section including the central CL.
- L4 is parallel to the X-axis direction and is the width of the laminated steel plate of the wound steel core in the flat cross section including the center CL.
- L5 is the distance between the plane portions (distance between the bent portions) arranged adjacent to each other in the innermost part of the wound iron core so as to form a right angle together.
- L5 is the longitudinal length of the shortest flat surface portion 4a among the flat surface portions 4, 4a of the innermost directional electromagnetic steel sheet).
- r is the radius of curvature of the bent portion 5 on the inner surface side of the wound iron core.
- ⁇ is the bending angle of the bent portion 5 of the wound iron core.
- Table 1 substantially rectangular iron core core No. In a to d, the plane portion having the inner surface side plane portion distance L1 is divided at substantially the center of the distance L1, and has a structure in which two iron cores having a "substantially U-shaped" shape are connected.
- the iron core of c is obtained by shearing a steel plate, which has been conventionally used as a general wound iron core, winding it into a cylindrical shape, and then pressing the corner portion of the tubular laminated body so as to have a constant curvature. It is a so-called tranco-core type wound steel core having a radius of curvature of 25 mm, which is manufactured by a method of forming into a rectangle.
- the iron core of d is a wound core in the form of a unicore having a radius of curvature r of 1 mm having three bent portions 5 in one corner portion 3, and the core No.
- the iron core of a is a wound core in the form of a unicore having a radius of curvature r of 1 mm having two bent portions 5 in one corner portion 3, and the core No.
- the radius of curvature r is the core No. It is a unicore type wound core that is considerably larger than the cores of a and d (radius of curvature r is 20 mm).
- Tables 2A and 2B show the above-mentioned surface roughness ratios Ral / Rac obtained by measuring the materials of 58 cases in which the steel plate thickness (mm) was set based on the various core shapes as described above. It is also shown, and it is evaluated by measuring the temperature rise ⁇ T (° C.) of the iron core and the winding.
- the one shown in FIG. 10 formed by winding the winding 75 around the iron core 10 is prepared, immersed in oil, and operated at a load factor of 40% and a set magnetic flux density of 1.7 T for 72 hours. After that, the temperature of the oil was measured and the temperature rise (temperature after 2 hours-initial temperature) was evaluated. The pass was 6.6 degrees or less.
- the core No. For all the iron cores a, b, c, and d, if the surface roughness ratio Ral / Rac is within the range of 1.5 ⁇ Ral / Rac ⁇ 12.0, a part of them, regardless of the plate thickness. With exceptions, the temperature rise ⁇ T (° C) of the iron core and winding is suppressed to 6.6 ° C or lower.
- the rolled iron core of the present invention is assembled by assembling the grain-oriented electrical steel sheet 1 so as to be displaced in the width direction to increase the surface area of the L cross section and change the surface roughness Ral of the L cross section of the rolled iron core. Since the roughness ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0, it has been clarified that the temperature rise of the iron core and the winding can be effectively reduced.
- wound core The wound core, the method for manufacturing the wound core, and the wound core manufacturing apparatus of the above-described embodiment can be grasped as follows.
- the winding iron core of the present disclosure has a rectangular hollow portion in the center, and includes a portion in which grain-oriented electrical steel sheets in which flat portions and bent portions are alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It is a wound steel core with a circular shape, and is formed by stacking individually bent electrical steel sheets in layers and assembling them into a wound shape.
- Directional direction In a wound steel core in which electrical steel sheets are connected to each other, In the directional electromagnetic steel plate located at the innermost circumference of the wound shape among the laminated directional electromagnetic steel plates in the L cross section parallel to the longitudinal direction, which is a cross section along the plate thickness direction of the directional electromagnetic steel plate.
- Ral is the surface roughness of the steel plate portion along the straight line connecting an arbitrary point and an arbitrary point in the directional electromagnetic steel plate located on the outermost circumference, and in any one of the directional electromagnetic steel plates to be laminated. Assuming that the surface roughness of the steel plate portion along the straight line connecting arbitrary points on the end face along the plate thickness direction parallel to the longitudinal direction is Rac, the ratio Ral / Rac is 1.5 ⁇ Ral / Rac ⁇ 12. It is characterized by satisfying the relationship of 0.0.
- the method for manufacturing a wound steel core of the present disclosure has a rectangular hollow portion in the center, and a portion in which grain-oriented electrical steel sheets in which flat portions and bent portions are alternately continuous in the longitudinal direction are stacked in the plate thickness direction. It is a wound core having a winding shape including, and is formed by stacking individually bent electrical steel sheets in layers and assembling them into a winding shape, and through at least one joint for each winding.
- a wound steel core in which a plurality of grain-oriented electrical steel sheets are connected to each other.
- Ral is the surface roughness of the steel plate portion along the straight line connecting an arbitrary point on the directional electromagnetic steel plate located on the innermost circumference of the winding shape and an arbitrary point on the directional electromagnetic steel plate located on the outermost circumference.
- the surface roughness of the steel plate portion along the straight line connecting arbitrary points on the end face along the plate thickness direction parallel to the longitudinal direction in any one of the laminated electromagnetic steel plates is Rac.
- the ratio Ral / Rac is characterized by satisfying the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0.
- the wound steel core manufacturing apparatus of the present disclosure includes a bending portion for individually bending a grain-oriented electrical steel sheet and a bending portion.
- a bending portion for individually bending a grain-oriented electrical steel sheet and a bending portion.
- the ratio Ral / Rac satisfies the relationship of 1.5 ⁇ Ral / Rac ⁇ 12.0, and the positions of both ends in the width direction of the directional electromagnetic steel plate are defined as described above.
- a guide for guiding the directional electromagnetic steel plate in the longitudinal direction is provided, and the directional electromagnetic steel plate is displaced in the width direction by changing the position of the guide.
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Abstract
Description
前記巻鉄心の最外周に位置される方向性電磁鋼板における板厚方向の中心と、を結ぶ方向に沿う鋼板部位の表面粗度をRalとし、積層される前記方向性電磁鋼板の前記平面部の端面において、前記長手方向と平行な方向の前記方向性電磁鋼板の表面粗度をRacとするときに、前記Ralと前記Racとの比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすように、前記方向性電磁鋼板それぞれが前記巻鉄心の1つの層を形成するように積み重ね、かつ、前記ガイドの位置を変えることによって、積み重ねられる前記方向性電磁鋼板のうちのいずれか1枚以上を、その長手方向の全長にわたって、他の層を形成する前記方向性電磁鋼板に対し、前記長手方向と直交する幅方向でずらすように組み付ける巻鉄心の製造方法であってもよい。
また、本明細書において用いる、形状や幾何学的条件並びにそれらの程度を特定する、例えば、「平行」、「垂直」、「同一」、「直角」等の用語や長さや角度の値等については、厳密な意味に縛られることなく、同様の機能を期待し得る程度の範囲を含めて解釈することとする。
また、本明細書において「方向性電磁鋼板」のことを単に「鋼板」又は「電磁鋼板」と記載し、「巻鉄心」のことを単に「鉄心」と記載する場合もある。
図1は、巻鉄心の一実施形態を模式的に示す斜視図である。図2は、図1の実施形態に示される巻鉄心の側面図である。また、図3は、巻鉄心の別の一実施形態を模式的に示す側面図である。
なお、本発明において側面視とは、巻鉄心を構成する長尺状の方向性電磁鋼板の幅方向(図1におけるY軸方向)に視ることをいう。側面図とは側面視により視認される形状を表わした図(図1のY軸方向の図)である。
図1及び図2に示されるように、巻鉄心本体10は、長手方向に平面部4,4aと屈曲部5とが交互に連続する方向性電磁鋼板1が、板厚方向に積み重ねられた部分を含み、側面視において中空部15を有する略矩形状の積層構造2を有する。屈曲部5を含むコーナー部3は、側面視において、曲線状の形状を有する屈曲部5を2つ以上有しており、1つのコーナー部3に存在する屈曲部5のそれぞれの曲げ角度の合計が例えば90°となっている。コーナー部3は、隣り合う屈曲部5,5間に、平面部4よりも短い平面部4aを有している。したがって、コーナー部3は、2以上の屈曲部5と、1つ以上の平面部4aとを有する形態となっている。なお、図2の実施形態は1つの屈曲部5が45°である。図3の実施形態は1つの屈曲部5が30°である。
そして、本発明において屈曲部5とは、方向性電磁鋼板1の側面視において、上記点D、点E、点F、点Gにより囲まれる方向性電磁鋼板1の部位である。図6においては、点Dと点Eとの間の鋼板表面、すなわち、屈曲部5の内側表面をLa、点Fと点Gとの間の鋼板表面、すなわち、屈曲部5の外側表面をLbとして示している。なお、本開示の巻鉄心では、板厚方向に積層された各方向性電磁鋼板1の各屈曲部5における曲率半径は特に限定されない。
本実施の形態においては、巻鉄心本体10が、全体として側面視が略多角形状の積層構造を有していればよい。図4の例に示されるように、1つの接合部6を介して1枚の方向性電磁鋼板が巻鉄心本体10の1層分を構成する(一巻ごとに1箇所の接合部6を介して1枚の方向性電磁鋼板が接続される)ものであってもよく、図5の例に示されるように1枚の方向性電磁鋼板1が巻鉄心の約半周分を構成し、2つの接合部6を介して2枚の方向性電磁鋼板1が巻鉄心本体10の1層分を構成する(一巻ごとに2箇所の接合部6を介して2枚の方向性電磁鋼板が互いに接続される)ものするものであってもよい。
また、一般的に歪や溝等を用いた「磁区制御」と呼ばれる処理を鋼板の製造工程において公知の方法で施した鋼板であっても本発明効果を享受できる。
実証データの取得に際し、本発明者らは、各鋼板を素材として、表1および図12に示す形状を有する鉄心a~dを製造した。
なお、L1はX軸方向に平行で、中心CLを含む平断面での巻鉄心の最内周にある互いに平行な方向性電磁鋼板1間の距離(内面側平面部間距離)である。L2はZ軸方向に平行で、中心CLを含む縦断面での巻鉄心の最内周にある互いに平行な方向性電磁鋼板1間の距離(内面側平面部間距離)である。L3はX軸方向に平行で、中心CLを含む平断面での巻鉄心の積層厚さ(積層方向の厚さ)である。L4はX軸方向に平行で、中心CLを含む平断面での巻鉄心の積層鋼板幅である。L5は巻鉄心の最内部の互いに隣り合って、かつ、合わせて直角を為すように配置された平面部間距離(屈曲部間の距離)である。言い換えるとL5は最内周の方向性電磁鋼板の平面部4,4aのうち、最も長さが短い平面部4aの長手方向の長さ)である。rは巻鉄心の内面側の屈曲部5の曲率半径である。φは巻鉄心の屈曲部5の曲げ角度である。表1の略矩形状の鉄心コアNo.a~dは、内面側平面部距離がL1である平面部が距離L1のほぼ中央で分割されており、「略コの字」の形状を有する2つの鉄心を結合した構造となっている。
上記の実施形態の巻鉄心、巻鉄心の製造方法、および巻鉄心製造装置は、以下のように把握され得る。
前記方向性電磁鋼板の板厚方向に沿う断面である前記長手方向と平行なL断面において、積層される前記方向性電磁鋼板のうち巻回形状の最内周に位置される方向性電磁鋼板における任意の点と最外周に位置される方向性電磁鋼板における任意の点とを結ぶ直線に沿う鋼板部位の表面粗度をRalとし、積層される前記方向性電磁鋼板のうちの任意の1枚において、前記長手方向と平行な板厚方向に沿う端面における任意の点同士を結ぶ直線に沿う鋼板部位の表面粗度をRacとすると、その比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすことを特徴とする。
それぞれが対応する1つの層を形成するように積み重ねられる前記方向性電磁鋼板のうちのいずれか1枚以上を、その長手方向の全長にわたって、他の層を形成する方向性電磁鋼板に対し、前記長手方向と直交する幅方向でずらすように組み付け、それにより、前記方向性電磁鋼板の厚さ方向に沿う断面である前記長手方向と平行なL断面において、積層される前記方向性電磁鋼板のうち巻回形状の最内周に位置される方向性電磁鋼板における任意の点と最外周に位置される方向性電磁鋼板における任意の点とを結ぶ直線に沿う鋼板部位の表面粗度をRalとし、積層される前記方向性電磁鋼板のうちの任意の1枚において、前記長手方向と平行な板厚方向に沿う端面における任意の点同士を結ぶ直線に沿う鋼板部位の表面粗度をRacとするときに、その比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすようにすることを特徴とする。
前記折り曲げ加工部により個別に折り曲げ加工された各方向性電磁鋼板を層状に積み重ねて巻回形状に組み付けることにより、一巻ごとに少なくとも1箇所の接合部を介して複数枚の方向性電磁鋼板が互いに接続され且つ長手方向に平面部と屈曲部とが交互に連続する方向性電磁鋼板が板厚方向に積み重ねられた部分を含んで成る中心に矩形の中空部を有する巻回形状の巻鉄心を形成する、組み付け部と、
を備え、
前記組み付け部は、それぞれが対応する1つの層を形成するように積み重ねられる前記方向性電磁鋼板のうちのいずれか1枚以上を、その長手方向の全長にわたって、他の層を形成する方向性電磁鋼板に対し、前記長手方向と直交する幅方向でずらすように組み付け、それにより、前記方向性電磁鋼板の厚さ方向に沿う断面である前記長手方向と平行なL断面において、積層される前記方向性電磁鋼板のうち巻回形状の最内周に位置される方向性電磁鋼板における任意の点と最外周に位置される方向性電磁鋼板における任意の点とを結ぶ直線に沿う鋼板部位の表面粗度をRalとし、積層される前記方向性電磁鋼板のうちの任意の1枚において、前記長手方向と平行な板厚方向に沿う端面における任意の点同士を結ぶ直線に沿う鋼板部位の表面粗度をRacとするときに、その比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすようにするとともに、前記方向性電磁鋼板の幅方向両端の位置を規定しつつ前記方向性電磁鋼板を長手方向で案内するガイドを備え、前記ガイドの位置を変えることによって前記方向性電磁鋼板を前記幅方向でずらすことを特徴とする。
4 平面部
5 屈曲部
6 接合部
10 巻鉄心(巻鉄心本体)
Claims (3)
- 中心に矩形の中空部を有し、長手方向に平面部と屈曲部とが交互に連続する方向性電磁鋼板が板厚方向に積み重ねられた部分を含む巻回形状の巻鉄心であって、
個別に折り曲げ加工された前記方向性電磁鋼板を層状に積み重ねて巻回形状に組み付けることにより形成され、一巻ごとに少なくとも1箇所の接合部を介して複数枚の方向性電磁鋼板が互いに接続される巻鉄心において、
前記方向性電磁鋼板の板厚方向に沿い、かつ、前記方向性電磁鋼板の長手方向と平行な前記巻鉄心の端面において、
前記板厚方向に沿って、
積層される前記方向性電磁鋼板のうち前記巻鉄心の最内周に位置される方向性電磁鋼板における板厚方向の中心と、
前記巻鉄心の最外周に位置される方向性電磁鋼板における板厚方向の中心と、
を結ぶ方向に沿う鋼板部位の表面粗度をRalとし、
積層される前記方向性電磁鋼板の前記平面部の端面において、前記長手方向と平行な方向の前記方向性電磁鋼板の表面粗度をRacとすると、前記Ralと前記Racとの比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすことを特徴とする巻鉄心。 - 中心に矩形の中空部を有し、長手方向に平面部と屈曲部とが交互に連続する方向性電磁鋼板が板厚方向に積み重ねられた部分を含む巻回形状の巻鉄心であって、
個別に折り曲げ加工された前記方向性電磁鋼板を層状に積み重ねて巻回形状に組み付けることにより形成され、一巻ごとに少なくとも1箇所の接合部を介して複数枚の方向性電磁鋼板が互いに接続される巻鉄心の製造方法において、
前記方向性電磁鋼板の板厚方向に沿い、かつ、前記方向性電磁鋼板の長手方向と平行な前記巻鉄心の端面において、
前記板厚方向に沿って、
積層される前記方向性電磁鋼板のうち、前記巻鉄心の最内周に位置される方向性電磁鋼板における板厚方向の中心と、
前記巻鉄心の最外周に位置される方向性電磁鋼板における板厚方向の中心とを結ぶ方向に沿う鋼板部位の表面粗度をRalとし、
積層される前記方向性電磁鋼板の前記平面部の端面において、前記長手方向と平行な方向の前記方向性電磁鋼板の表面粗度をRacとするときに、前記Ralと前記Racとの比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすように、
前記方向性電磁鋼板それぞれが前記巻鉄心の1つの層を形成するように積み重ね、かつ、
積み重ねられる前記方向性電磁鋼板のうちのいずれか1枚以上を、その長手方向の全長にわたって、他の層を形成する方向性電磁鋼板に対し、前記長手方向と直交する幅方向でずらすように組み付けること
を特徴とする巻鉄心の製造方法。 - 方向性電磁鋼板を個別に折り曲げ加工する折り曲げ加工部と、
前記折り曲げ加工部により個別に折り曲げ加工された各前記方向性電磁鋼板を層状に積み重ねて巻回形状に組み付けることにより、一巻ごとに少なくとも1箇所の接合部を介して複数枚の方向性電磁鋼板が互いに接続され且つ長手方向に平面部と屈曲部とが交互に連続する方向性電磁鋼板が板厚方向に積み重ねられた部分を含んで成る中心に矩形の中空部を有する巻回形状の巻鉄心を形成する、組み付け部と、
を備え、
前記組み付け部は、
前記方向性電磁鋼板の幅方向の両端の位置を規定しつつ前記方向性電磁鋼板を長手方向で案内するガイドを備え、
前記組み付け部は、
前記方向性電磁鋼板の板厚方向に沿い、かつ、前記方向性電磁鋼板の長手方向と平行な前記巻鉄心の端面において、
前記板厚方向に沿って、
積層される前記方向性電磁鋼板のうち、前記巻鉄心の最内周に位置される方向性電磁鋼板における板厚方向の中心と、
前記巻鉄心の最外周に位置される方向性電磁鋼板における板厚方向の中心と、を結ぶ方向に沿う鋼板部位の表面粗度をRalとし、
積層される前記方向性電磁鋼板の前記平面部の端面において、前記長手方向と平行な方向の前記方向性電磁鋼板の表面粗度をRacとするときに、前記Ralと前記Racとの比率Ral/Racが、1.5≦Ral/Rac≦12.0の関係を満たすように、
前記方向性電磁鋼板それぞれが前記巻鉄心の1つの層を形成するように積み重ね、かつ、
前記ガイドの位置を幅方向で変えることによって、積み重ねられる前記方向性電磁鋼板のうちのいずれか1枚以上を、その長手方向の全長にわたって、他の層を形成する前記方向性電磁鋼板に対し、前記長手方向と直交する幅方向でずらすように組み付ける、ことを特徴とする巻鉄心製造装置。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005286169A (ja) | 2004-03-30 | 2005-10-13 | Toshiba Corp | 変圧器の巻鉄心の製造方法及びその製造装置 |
JP2017159347A (ja) * | 2016-03-11 | 2017-09-14 | Jfeスチール株式会社 | 積層鉄心の製造方法及び製造装置 |
JP6224468B2 (ja) | 2014-01-27 | 2017-11-01 | 東芝産業機器システム株式会社 | 巻鉄心および巻鉄心の製造方法 |
WO2018131613A1 (ja) * | 2017-01-10 | 2018-07-19 | 新日鐵住金株式会社 | 巻鉄心、及びその製造方法 |
JP2018148036A (ja) | 2017-03-06 | 2018-09-20 | 新日鐵住金株式会社 | 巻鉄心 |
JP2020178565A (ja) | 2019-04-23 | 2020-11-05 | ジェネシスヘルスケア株式会社 | 慢性副鼻腔炎のリスクを判定する方法 |
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US4197233A (en) | 1978-03-15 | 1980-04-08 | Kennecott Copper Corporation | Anti-fouling and anti-sliming coating material |
JPH0319207A (ja) * | 1989-06-16 | 1991-01-28 | Nachi Fujikoshi Corp | 高透磁率、低鉄損の小型矩形状巻磁心 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005286169A (ja) | 2004-03-30 | 2005-10-13 | Toshiba Corp | 変圧器の巻鉄心の製造方法及びその製造装置 |
JP6224468B2 (ja) | 2014-01-27 | 2017-11-01 | 東芝産業機器システム株式会社 | 巻鉄心および巻鉄心の製造方法 |
JP2017159347A (ja) * | 2016-03-11 | 2017-09-14 | Jfeスチール株式会社 | 積層鉄心の製造方法及び製造装置 |
WO2018131613A1 (ja) * | 2017-01-10 | 2018-07-19 | 新日鐵住金株式会社 | 巻鉄心、及びその製造方法 |
JP2018148036A (ja) | 2017-03-06 | 2018-09-20 | 新日鐵住金株式会社 | 巻鉄心 |
JP2020178565A (ja) | 2019-04-23 | 2020-11-05 | ジェネシスヘルスケア株式会社 | 慢性副鼻腔炎のリスクを判定する方法 |
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---|
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