WO2020071512A1 - 巻鉄心及び変圧器 - Google Patents
巻鉄心及び変圧器Info
- Publication number
- WO2020071512A1 WO2020071512A1 PCT/JP2019/039206 JP2019039206W WO2020071512A1 WO 2020071512 A1 WO2020071512 A1 WO 2020071512A1 JP 2019039206 W JP2019039206 W JP 2019039206W WO 2020071512 A1 WO2020071512 A1 WO 2020071512A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel sheet
- electromagnetic steel
- core
- core member
- laminate
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 172
- 239000010959 steel Substances 0.000 claims abstract description 172
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 111
- 238000004804 winding Methods 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 abstract description 40
- 230000004907 flux Effects 0.000 description 46
- 230000000052 comparative effect Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 13
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 description 7
- 238000009413 insulation Methods 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- 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
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- 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
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
-
- 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
- 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
Definitions
- the present invention relates to a wound iron core and a transformer.
- the wound core is used as a magnetic core of a transformer (transformer), a reactor, a noise filter, or the like.
- transformers Conventionally, in transformers, low iron loss has been one of the important issues from the viewpoint of high efficiency, and low iron loss has been studied from various viewpoints.
- Patent Document 1 discloses a rectangular annular wound core made of a laminated body of electromagnetic steel sheets and having a joint, a winding wound around at least one of the columnar portions of the wound core, and a columnar portion having a joined portion. And a tension applying member for applying a circumferential tension to at least one columnar portion of the wound iron core.
- Patent Document 2 discloses a wound core having a winding thickness of 40 mm or more in which a plurality of directional electromagnetic steel sheets annular in a side view are stacked in a plate thickness direction, and an inner core disposed on an inner surface side, and an inner core.
- the outer core is disposed on the outer surface side of the inner core, the winding thickness of the inner core is a predetermined dimension, the grain-oriented electrical steel sheet forming the inner core of the grain-oriented electrical steel sheet is a metal containing twins
- Disclosed is a wound iron core having a plurality of bent portions formed in a curved shape in a side view, wherein the outer core has a higher space factor of the grain-oriented electrical steel sheet than the inner core. .
- Patent Document 3 a thin plate-shaped magnetic material is formed by cutting out an electromagnetic steel sheet into a substantially trapezoidal shape, a substantially trapezoidal quadrilateral shape, a substantially pentagonal shape, and the like. It is disclosed that one layer of a laminated iron core is constituted by arranging on a plane to be formed and abutting surfaces in a thickness direction with each other. Patent Document 3 discloses a configuration in which a gap having a certain width is formed at an abutting portion, and a patch-shaped magnetic material is fixed so as to cover the front surface of the gap.
- Patent Document 4 in a separation type transformer including a fixed iron core and a movable iron core, in order to prevent a leakage magnetic flux, a configuration in which a holding plate is closely attached around a joint between the fixed iron core and the movable iron core. Is disclosed.
- an object of the present invention is to provide a wound iron core and a transformer with reduced iron loss.
- the present inventors have conducted intensive studies and focused on iron loss caused by a bent portion in a wound iron core. That is, in the bent portion, the magnetic permeability decreases and the iron loss increases. Further, in these portions, leakage magnetic flux is generated, and iron loss increases due to eddy current generated by the leakage magnetic flux.
- the present inventors for the purpose of suppressing iron loss about such a bent portion, by providing a new magnetic path on the side surface of the bent portion or the bent portion in the wound core, to suppress the leakage magnetic flux, and, It has been found that by suppressing eddy currents generated in portions other than the magnetic path, iron loss is reduced. As a result of further investigation, the present invention has been reached.
- the gist of the present invention completed based on the above findings is as follows.
- a core member formed by winding a first electromagnetic steel sheet, being annular as viewed from the side, and having one or more bent portions as viewed from the side;
- the laminate is arranged such that a surface formed by a side surface of the second electromagnetic steel sheet is aligned with at least one of a surface formed by a side surface of the first electromagnetic steel plate in the bent portion of the core member.
- Winding iron core (2) The wound iron core according to (1), wherein the direction of the laminated surface of the second electromagnetic steel sheet of the laminate is along the direction of the laminated surface of the first electromagnetic steel sheet of the core member.
- a core member formed by winding the first electromagnetic steel sheet being annular as viewed from the side, and having one or more bent portions as viewed from the side;
- FIG. 1 is a perspective view illustrating an example of a wound core according to an embodiment of the present invention. It is the top view which looked at the core member with which the winding core shown in FIG. 1 was provided from the side of the electromagnetic steel plate.
- FIG. 2 is a partially enlarged plan view illustrating a part of a side surface of the core member for describing an example of an arrangement of a core member and a laminate included in the wound core illustrated in FIG. 1.
- FIG. 2 is an explanatory diagram for explaining an arrangement of a laminate provided in the wound core shown in FIG. 1.
- FIG. 2 is an exploded perspective view illustrating an example of a method of attaching a laminate included in the wound core illustrated in FIG. 1.
- FIG. 9 is a schematic diagram illustrating a state where a magnetic flux passes through a core member when a laminate is not provided.
- FIG. 9 is a schematic diagram showing a state where a laminate is arranged so as to cover a strain region with respect to FIG. 8.
- FIG. 10 is a schematic diagram showing a cross section taken along a dashed-dotted line II ′ shown in FIG.
- FIG. 4 is a schematic diagram illustrating an example in which a region on the side of the rectangular laminate illustrated in FIG. 3 is cut at a position outside a corner. It is a schematic diagram which shows the example which made the 2nd electromagnetic steel plate which comprises a laminated body into an arc shape.
- the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel plates with respect to the thickness T 1 of the first electromagnetic steel plates, is a characteristic diagram showing the relationship between iron loss of the core member.
- FIG. 1 is a perspective view showing an example of a wound core according to an embodiment of the present invention.
- FIG. 2 is a plan view of a core member included in the wound iron core shown in FIG. 1 as viewed from a side surface of an electromagnetic steel sheet.
- FIG. 3 is a partially enlarged plan view showing a part of a side surface of the core member for describing an example of an arrangement of a core member and a laminate provided in the wound core shown in FIG. 1.
- FIG. 4 is an explanatory diagram for explaining the arrangement of the laminate provided in the wound core shown in FIG. 1.
- the core member 1 is formed by winding the first electromagnetic steel sheet 20, is annular when viewed from the side, and has one or more bent portions 22 when viewed from the side; At least one of the side surfaces of the first electromagnetic steel sheet 20 in the core member 2, wherein the second electromagnetic steel sheet 30 has a plurality of stacked bodies 3 on which the second electromagnetic steel sheet 30 is stacked.
- the surface formed by the side surface of the electromagnetic steel plate 30 is arranged along the surface formed by the side surface of the first electromagnetic steel plate 20 in the bent portion 22.
- the wound core 1 is formed in an octagon as a whole.
- the wound core 1 includes a core member 2, a laminate 3, and a jig 4.
- the core member 2 is a wound body formed by winding a belt-shaped first electromagnetic steel sheet 20, and has one or more bent portions 22. Specifically, the core member 2 is bent so that the side surface of the first electromagnetic steel sheet 20 forms four corners 23 at the innermost circumference, and forms a square shape. Is bent at the corner 23 of the innermost first electromagnetic steel sheet 20 and wound so that two corners 24 are formed. As a result, when viewed from the side of the first electromagnetic steel sheet 20, the core member 2 forms an octagon having eight corners 24 on the outer periphery, while the four corners 23 are formed on the inner periphery. Have a square shape. The core member 2 is formed on a straight side 21 along the straight portion of the innermost first electromagnetic steel sheet 20, a corner 23 on the innermost periphery, and an outer peripheral side of the corner 23. And four bent portions 22 each having two corner portions 24.
- the thickness of the first electromagnetic steel sheet 20 can be, for example, 0.20 mm or more and 0.40 mm or less.
- a thin electromagnetic steel sheet as the first electromagnetic steel sheet 20
- eddy currents are less likely to be generated in the thickness plane of the first electromagnetic steel sheet 20
- eddy current loss among iron losses can be reduced.
- the thickness of the first magnetic steel sheet 20 is preferably 0.18 mm or more and 0.35 mm or less, and more preferably 0.18 mm or more and 0.27 mm or less.
- the first magnetic steel sheet 20 for example, an existing grain-oriented magnetic steel sheet or an existing non-oriented magnetic steel sheet can be used.
- the first magnetic steel sheet 20 is a grain-oriented magnetic steel sheet.
- the first electromagnetic steel sheets 20 that are wound and form a layer are insulated from each other.
- the surface of the first electromagnetic steel sheet 20 be subjected to insulation treatment. Since the layers of the first electromagnetic steel sheet 20 are insulated, eddy current is less likely to be generated in the thickness plane of the first electromagnetic steel sheet 20, and eddy current loss can be reduced. As a result, it is possible to further reduce the iron loss of the wound core 1.
- the surface of the first magnetic steel sheet 20 is preferably subjected to an insulating treatment using an insulating coating solution containing colloidal silica and phosphate.
- Laminated body 3 is formed by laminating a plurality of plate-shaped second electromagnetic steel sheets 30.
- the laminate 3 contacts at least one of the side surfaces of the bent portion 22 with the side surface of the second electromagnetic steel plate 30 of the laminate 3 contacting the side surface of the first electromagnetic steel plate 20 of the bent portion 22 while maintaining insulation. It is arranged along.
- the magnetic flux passing through the core member 2 easily leaks from the bent portion of the first electromagnetic steel sheet 20 at the bent portion, and the larger the first electromagnetic steel sheet 20 is bent, the more easily the magnetic flux leaks.
- the first electromagnetic steel sheet 20 is largely bent at a straight line portion connecting the corner 23 and the corner 24, the magnetic flux passing through the core member 2 easily leaks at such a portion.
- the laminate 3 is arranged on at least one of the side surfaces of the bent portion 22 such that the side surface of the second electromagnetic steel plate 30 of the laminate 3 is along the side surface of the first electromagnetic steel plate 20 of the bent portion 22. Therefore, the leakage magnetic flux generated at the bent portion 22 can pass through the laminated body 3 from one side 21 and then pass through the other side 21 connected to the laminated body 3. As a result, it is possible to reduce iron loss occurring in the wound core 1.
- the laminated body 3 is disposed on both side surfaces of the bent portion 22, so that iron loss can be further reduced.
- the laminate 3 and the core member 2 are insulated.
- an insulating sheet between the laminate 3 and the core member 2.
- various known insulators such as natural rubber, epoxy resin, polyvinyl chloride or polyurethane insulating material can be used.
- the angle ⁇ of the laminated surface of the second electromagnetic steel sheets 30 in the laminated body 3 is arranged to be 45 degrees or more and 90 degrees or less.
- the angle ⁇ is equal to or greater than 45 degrees and equal to or less than 90 degrees, the second electromagnetic steel sheet 30 becomes a magnetic path of the leakage magnetic flux generated in the bent portion 22, and thus the eddy current generated in portions other than the magnetic path is further suppressed.
- the angle of the laminated surface of the electromagnetic steel sheets in the laminated body is not less than 75 degrees and not more than 90 degrees.
- Laminate 3 is arranged, for example, in FIG. 3 such that the lamination surface of second electromagnetic steel sheet 30 is at 90 degrees with respect to straight line L.
- the second electromagnetic steel sheet 30 serves as a magnetic path of the leakage magnetic flux generated in the bent portion 22, so that eddy current generated in a portion other than the magnetic path is suppressed. As a result, iron loss is reduced.
- the thickness T2 of the second magnetic steel sheet 30 is not particularly limited. However, the thickness T2 of the second magnetic steel sheet 30 can preferably be the same as the thickness T1 of the first magnetic steel sheet 20, or can be equal to or less than the thickness T1 of the first magnetic steel sheet 20. By making the thickness T2 of the second magnetic steel sheet 30 smaller than the thickness T1 of the first magnetic steel sheet 20, the leakage magnetic flux generated at the bent portion 22 of the core member 2 passes through the laminate 3 more efficiently. Become.
- the thickness is smaller than 1 , the eddy current loss is reduced, and the loss in the laminate 3 is suppressed. This makes it possible to further reduce the eddy current loss caused by the leakage magnetic flux. As a result, it is possible to further reduce the iron loss of the wound core 1. Therefore, preferably, the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel plates 30 to the thickness T 1 of the first electromagnetic steel plates 20 is 1.0 or less. On the other hand, in consideration of the range of plate thickness that can be manufactured, the lower limit of T 2 / T 1 is about 0.5.
- FIG. 13 is a characteristic diagram showing the relationship between the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel sheet 30 to the thickness T 1 of the first electromagnetic steel sheet 20 and the core loss of the core member 2.
- FIG. 13 shows characteristics when a 25 kVA and 75 kVA transformer is manufactured using the wound iron core 1 according to the present embodiment. As shown in FIG. 13, in any of the transformers of 25 kVA and 75 kVA, the iron loss increases as the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel sheet 30 to the thickness T 1 of the first electromagnetic steel sheet 20 decreases. Was obtained. Therefore, it is preferable to make the value of T 2 / T 1 as small as possible.
- the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel sheet 30 to the thickness T 1 of the first electromagnetic steel sheet 20 is preferably 1.0 or less.
- the second magnetic steel sheet 30 may be the same or different from the first magnetic steel sheet 20.
- the second electromagnetic steel sheet 30 for example, an existing grain-oriented electrical steel sheet or an existing non-oriented electrical steel sheet can be used.
- the second magnetic steel sheet 30 is a grain-oriented magnetic steel sheet.
- the second electromagnetic steel sheets 30 are insulated from each other.
- the surface of the electromagnetic steel sheets is preferably subjected to an insulation treatment. Since the lamination of the second electromagnetic steel sheets 30 is insulated, eddy currents are less likely to occur in the thickness plane of the second electromagnetic steel sheets 30, and eddy current loss can be further reduced. Becomes As a result, it is possible to further reduce the iron loss of the wound core 1.
- the surface of the second electromagnetic steel sheet 30 is preferably subjected to an insulation treatment using an insulating coating solution containing colloidal silica and phosphate.
- the laminated body 3 may have a through-hole penetrating the laminated body 3 from the side as needed.
- the stack 3 is fixed to the core member 2 by inserting a stopper such as a bolt of the jig 4 into the through hole.
- FIG. 5 is an exploded perspective view showing an example of a method of attaching the laminate provided in the wound iron core shown in FIG.
- the jig 4 has a support column 41, a fixing plate 42, an outer plate 43, an inner plate 44, a bolt 45, and a nut 46.
- support pillars 41 that support the laminate 3 are arranged on the outer peripheral side and the inner peripheral side of the bent portion 22. Further, a fixed plate 42 disposed so as to sandwich the bent portion 22 and the laminate 3, an outer plate 43 disposed on the outer peripheral side of the core member 2, and an inner plate disposed on the inner peripheral side of the core member 2 44, the laminate 3 is fixed to the bent portion 22.
- the laminate 3 has a through-hole into which the bolt 45 is inserted, and the support column 41 and the fixing plate 42 have through-holes at positions corresponding to the through-holes of the laminate 3.
- Bolts 45 are inserted into the through holes of the laminate 3, the through holes of the support columns 41, and the through holes of the fixing plate 42, and nuts 46 are fastened to the ends of the bolts 45.
- the outer plate 43 and the inner plate 44 have a plurality of through holes respectively corresponding to the plate thickness direction, the bolt 45 is inserted into these corresponding through holes, and the nut 46 is connected to an end of the bolt 45. Is concluded.
- the bolt 45 may be one whose surface is insulated at least.
- the bolt 45 may be made of an insulator such as a ceramic.
- the laminate 3 is fixed to the side surface of the core member 2 without conduction between the core member 2 and the laminate 3 by the bolt 45.
- the material of the bolt 45 is preferably a non-magnetic material. By making the material of the bolt 45 a non-magnetic material, it is possible to prevent leakage magnetic flux from entering the bolt 45 and generating an eddy current.
- FIG. 8 is a schematic diagram showing a state where a magnetic flux passes through the core member 2 when the laminate 3 is not provided.
- the first electromagnetic steel sheet 20 of the core member 2 is bent at the corner 24, and distortion occurs at the corner 24.
- a strain region 50 is formed in the core member 2 along the positions of the two corners 24.
- Arrows A1, A2, and A3 shown in FIG. 8 schematically show how the magnetic flux leaks when the magnetic flux passes through the strain region 50.
- the thickness of each of the arrows A1, A2, and A3 indicates the magnitude of the magnetic flux.
- the magnetic flux leaks, so that the magnitude of the magnetic flux decreases, and iron loss occurs.
- FIG. 9 shows a state where the stacked body 3 is arranged so as to cover the strain region 50 with respect to FIG.
- FIG. 10 is a diagram showing a cross section taken along a dashed line II ′ shown in FIG. 9, and is a schematic diagram schematically showing a state where a magnetic flux passes through a cross section taken along a dashed line II ′. is there.
- the flow of the magnetic flux is indicated by arrows.
- the laminate 3 covers the strain region 50 corresponding to the corner 24
- the magnetic flux passes through the laminate 3 at the position of the corner 24.
- the laminated body 3 is formed by laminating a plurality of plate-shaped second electromagnetic steel sheets 30, and the adjacent second electromagnetic steel sheets 30 are preferably insulated from each other. Therefore, eddy current loss when a magnetic flux passes through the multilayer body 3 is suppressed. Thereby, the core loss of the wound core 1 is reduced.
- FIG. 10 illustrates an example in which the laminate 3 is disposed on both side surfaces of the core member 2, the laminate 3 may be disposed on at least one side surface of the core member 2.
- the metal plate is disposed on the side surface of the core member 2, so that the first electromagnetic steel sheet 20 is laminated.
- the surfaces are short-circuited, and the insulation between the first electromagnetic steel sheets 20 cannot be maintained. Therefore, a large eddy current flows through the cross section of the first magnetic steel sheet 20, and the loss (eddy current loss) increases. Even if the metal plate and the core member 2 are insulated, the eddy current loss increases because the magnetic flux passes through a large cross section of the metal plate.
- the laminated body 3 is formed by laminating the plurality of plate-shaped second electromagnetic steel sheets 30, and the second electromagnetic steel sheets 30 of the laminated body 3 are insulated from each other, so that the magnetic flux is increased. Pass through a smaller cross section, and eddy current loss is reliably reduced. Therefore, the core loss of the wound core 1 is reduced.
- FIG. 3 shows the rectangular laminate 3, but the laminate 3 covers a region including the triangle having the corner 23 as the apex and the corner 24 as the side of the first electromagnetic steel sheet 20, and the periphery thereof.
- a substantially V-shaped shape may be used.
- FIG. 11 is a schematic diagram illustrating an example in which the region on the side 21 side of the rectangular laminate 3 illustrated in FIG. 3 is cut at a position outside the corner 24.
- the ends of the laminate 3 on the two sides 21 are offset from the corners 24 by a predetermined amount D.
- the leakage flux is captured in a region of a predetermined amount D closer to the side 21 than the corner 24.
- the predetermined amount D is increased, the leakage magnetic flux is more reliably captured, but the manufacturing cost of the multilayer body 3 increases because the area of the multilayer body 3 increases.
- FIG. 12 is a schematic view showing an example in which the second electromagnetic steel sheet 30 constituting the laminate 3 is formed in an arc shape.
- the ends on the two sides 21 of the laminate 3 are offset from the corners 24 by a predetermined amount D.
- the second electromagnetic steel sheet 30 By forming the second electromagnetic steel sheet 30 into an arc shape, the second electromagnetic steel sheet 30 extends in a direction along the first electromagnetic steel sheet 20 in a region closer to the side 21 than the corner 24. become.
- the direction of the second electromagnetic steel sheet 30 is greater in the configuration of FIG. You will get closer. Therefore, the laminated body 3 can more reliably supplement the leakage magnetic flux.
- the wound core 1 As described above, according to the present embodiment, it is possible to reduce iron loss occurring in the wound core 1. Further, with the wound core 1 according to the present embodiment, it is possible to suppress noise of a transformer manufactured using the wound core 1. That is, the laminate 3 is arranged on at least one of the side surfaces of the bent portion 22 such that the side surface of the second electromagnetic steel plate 30 of the laminate 3 is along the side surface of the first electromagnetic steel plate 20 of the bent portion 22. Therefore, the leakage magnetic flux generated at the bent portion 22 can pass through the laminated body 3 from one side 21 and then pass through the other side 21 connected to the laminated body 3. As a result, it is possible to reduce noise generated in the wound core 1.
- the wound iron core according to the present embodiment is applicable to a transformer.
- the transformer according to the present embodiment includes the wound core according to the present embodiment, a primary winding, and a secondary winding.
- a magnetic flux is generated in the wound core according to the present embodiment, and a change in the generated magnetic flux generates a voltage in the secondary winding.
- the laminated body of the wound iron core is arranged on at least one of the side surfaces of the bent portion, the side surface of the second electromagnetic steel sheet of the laminated body is arranged along the side surface of the first electromagnetic steel sheet of the bent portion.
- leakage of the magnetic flux generated in the wound core according to the present embodiment to the outside of the wound core is suppressed. As a result, it is possible to reduce iron loss occurring in the wound core, and to suppress noise of the transformer.
- the outer periphery of the side surface of the core member is octagonal
- the outer periphery of the side surface of the core member may be polygonal, rounded square, oval, elliptical, or the like.
- the bent portion is located between one adjacent side and the other side, and the extending direction of the first electromagnetic steel sheet on one side and the first electromagnetic steel sheet on the other side. Is a portion where the first electromagnetic steel sheet is bent and laminated.
- FIG. 6 is an enlarged plan view illustrating a part of a side surface of the core member for describing another example of the bent portion in the core member according to the present embodiment.
- FIG. 7 is an enlarged plan view illustrating a part of a side surface of the core member for describing another example of the bent portion in the core member according to the present embodiment.
- the first magnetic steel sheet 20 in the bent portion 22A shown in FIG. 6 is in the extending direction of the first magnetic steel sheet 20 in one side 21A and the first magnetic steel sheet 20 in the other side 21A.
- the first electromagnetic steel sheet 20 is bent so as to have three corners 24A on its outer periphery.
- the core member 2A forms a dodecagon having twelve corners 24A on its outer periphery when viewed from the side of the first electromagnetic steel sheet 20.
- the first electromagnetic steel plate 20 is bent at a straight line portion connecting the corner 23A and the corner 24A, the magnetic flux passing through the core member 2 easily leaks at that portion.
- the side surface of the second electromagnetic steel sheet 30 of the laminated body is aligned with the side surface of the first electromagnetic steel sheet 20 of the bent part 22A on at least one of the side surfaces of the bent portion 22A.
- the leakage magnetic flux generated at the bent portion 22A can pass through the laminated body according to the present embodiment from one side 21A, and then pass through the other side 21A connected to the laminated body. As a result, it is possible to reduce iron loss generated in the wound core.
- the core member 2B shown in FIG. 7 is formed such that the first electromagnetic steel sheet 20 is bent and wound, and the bent portion 22B has an arc shape.
- the bent portion 22B is a region where the arc-shaped first electromagnetic steel sheets 20 are stacked. Magnetic flux passing through the core member 2B easily leaks from the bent portion 22B.
- the side surface of the second electromagnetic steel plate 30 of the laminated body is along the side surface of the first electromagnetic steel plate 20 of the bent portion 22B.
- the leakage magnetic flux generated at the bent portion 22B can pass through the laminated body according to the present embodiment from one side 21B and then pass through the other side 21B connected to the laminated body. As a result, it is possible to reduce iron loss generated in the wound core.
- the case where the side surface inner periphery of the core member is square is described, but the present invention is not limited to this, and the side surface inner periphery of the core member is polygonal, rounded square, oval, Alternatively, the shape can be elliptical or the like.
- the inner periphery of the side surface of the core member can have a shape corresponding to the shape of the outer periphery of the side surface.For example, when the outer periphery of the side surface of the core member is octagonal, the inner periphery of the side surface can be octagonal.
- the inner periphery of the side surface of the member When the outer periphery of the side surface of the member is rounded square, the inner periphery of the side surface can be rounded square.
- the inner periphery of the side surface of the core member may have a shape different from the outer periphery of the side surface of the core member.
- the bent portion is located between one adjacent side and the other side, and the first electromagnetic steel sheet on one side and the other side on the other side. This is a portion where the first electromagnetic steel sheet is bent and stacked in the extending direction of the first electromagnetic steel sheet.
- the first electromagnetic steel sheet forming the side of the core member is linear.
- the first electromagnetic steel sheet forming the side of the core member is not linear. Or it may be curved.
- a portion having a large curvature in the core member can be a bent portion, and a portion having a small curvature can be a side portion.
- the shape of the core member whose side is curved is, for example, circular or elliptical.
- the shape of the laminate is a square plate
- the shape of the laminate is not particularly limited, and may be a shape corresponding to the shape of the side surface of the bent portion. it can.
- the laminate is a laminate of the second electromagnetic steel sheets on the flat plate
- the second magnetic steel plate is not limited to the flat plate, but is a curved one. Is also good.
- a laminate formed using the curved second electromagnetic steel sheet can be arranged on the side surface of the bent portion.
- the present invention is not limited to the illustrated embodiment, and for example, a treatment for fixing the laminated body without the through-hole to the core member.
- a tool may be used, and instead of the jig, an existing various adhesive may be used to bond the laminate to the side surface of the core member.
- an adhesive it is preferable that the adhesive has an insulating property.
- a grain-oriented magnetic steel sheet having a thickness of 0.23 mm was wound to produce a core member having bent portions at four corners.
- the wound core was manufactured by arranging them in parallel, and a transformer was manufactured using the wound core.
- Table 1 shows the capacity of each manufactured core, the shape of the core member, the total weight of the transformer, the weight of the core member 2 made of the first magnetic steel sheet 20, the core dimensions (length, width, lamination thickness, width), and iron loss.
- Table 3 shows a beat sound, and a value of the ratio T 2 / T 1 of the thickness T 2 of the second magnetic steel sheet 30 to the thickness T 1 of the first magnetic steel sheet 20.
- the total weight of the transformer is the total weight including the case, the winding, the core member 2, the laminate 3, and the like.
- a core member having bent portions at four corners was produced by winding a grain-oriented electrical steel sheet having a thickness of 0.23 mm in the same manner as in the example, and a laminated core was not disposed to obtain a wound core.
- 6 and Comparative Examples 7 and 8 in which a laminated body was arranged and T 2 / T 1 was set to 1.0 or more to form a wound core. Then, a transformer was manufactured using the wound core.
- the transformer as an example differs from the transformer as a comparative example in the presence or absence of a laminate.
- Example 1 and Comparative Example 1 have the same conditions except for the presence or absence of a laminate.
- Examples 2 to 6 have the same conditions as Comparative Examples 2 to 6 except for the presence or absence of a laminate.
- Comparative Examples 7 and 8 when the laminated body was provided, the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel sheet 30 to the thickness T 1 of the first electromagnetic steel sheet 20 was different from the embodiment. An example is shown.
- the Comparative Example 7 and Example 1, the second ratio T 2 / T 1 other than conditions of the thickness T 2 of the electromagnetic steel sheets 30 to the thickness T 1 of the first electromagnetic steel plates 20 are common.
- Example 6 and Comparative Example 8 have the same conditions except for the ratio T 2 / T 1 of the thickness T 2 of the second electromagnetic steel sheet 30 to the thickness T 1 of the first electromagnetic steel sheet 20.
- the rounded square shape is a shape having no bent portion at a corner portion and bent with a certain curvature, for example, a shape shown in FIG. Iron loss (no-load loss) and sound pressure were measured based on JEC-2200.
- Example 1 Comparing Example 1 with Comparative Example 1, the iron loss of Example 1 was 28.1 W, which was smaller than 30.9 W of the iron loss of Comparative Example 1.
- the value of the sound pressure of Example 1 was 40.0 dB, which was smaller than the value of the sound pressure of Comparative Example 1 of 44.0 dB.
- the examples 2 to 6 were compared with the comparative examples 2 to 6, respectively, the values of the iron loss and the sound pressure were smaller in the transformer of the example in each case.
- Example 1 when comparing Example 1 and Comparative Example 7, the iron loss of Example 1 was 28.1 W, which was smaller than the iron loss of Comparative Example 7 of 29.8 W.
- the value of the sound pressure of Example 1 was 40.0 dB, which was smaller than the value of the sound pressure of Comparative Example 7 of 42.1 dB.
- Example 6 Comparing Example 6 with Comparative Example 8, the iron loss of Example 6 was 47.2 W, which was smaller than the iron loss of Comparative Example 8 of 50.3 W.
- the value of the sound pressure of Example 6 was 47.2 dB, which was smaller than the value of the sound pressure of Comparative Example 8 of 50.3 dB.
Abstract
Description
(1) 第1の電磁鋼板が巻かれて形成され、側面から見て環状であって、側面から見て1以上の屈曲部を有するコア部材と、
第2の電磁鋼板が積層された1以上の積層体と、
を備え、
前記積層体は、前記コア部材の前記屈曲部における前記第1の電磁鋼板の側面で形成される面の少なくとも一方に、前記第2の電磁鋼板の側面で形成される面が沿うように配置されている、巻鉄心。
(2) 前記積層体の前記第2の電磁鋼板の積層面の方向は、前記コア部材の前記第1の電磁鋼板の積層面の方向に沿っている、(1)に記載の巻鉄心。
(3) 前記コア部材を前記第1の電磁鋼板の面に沿う方向から見た側面の少なくとも一方において、前記屈曲部における内周部の中点と、前記屈曲部における外周部の中点と、を結ぶ直線に対する、前記第2の電磁鋼板の積層面の角度は、45度以上90度以下である、(1)または(2)に記載の巻鉄心。
(4) 前記コア部材は、前記コア部材を側面から見たときに角部を有する、(1)~(3)のいずれかに記載の巻鉄心。
(5) 前記コア部材を側面から見たときの前記コア部材の形状は、八角形である、(1)~(4)のいずれかに記載の巻鉄心。
(6) 前記第2の電磁鋼板の厚みは、前記第1の電磁鋼板の厚みと同一、または前記第1の電磁鋼板の厚みより小さい、(1)~(5)のいずれかに記載の巻鉄心。
(7) 前記第1の電磁鋼板の厚みをT1、前記第2の電磁鋼板の厚みをT2とした時、T2/T1の比が0.5以上1.0以下である、(6)に記載の巻鉄心。
(8) 前記第2の電磁鋼板は、互いに絶縁されている、(1)~(7)のいずれかに記載の巻鉄心。
(9) 第1の電磁鋼板が巻き回されて形成され、側面から見て環状であって、側面から見て1以上の屈曲部を有するコア部材と、
第2の電磁鋼板が積層された1以上の積層体と、
を備え、
前記積層体は、前記コア部材の前記屈曲部における前記第1の電磁鋼板の側面で形成される面の少なくとも一方に、前記第2の電磁鋼板の側面で形成される面が沿うように配置されている、変圧器。
まず、図1~図4を参照して、本発明の一実施形態に係る巻鉄心及び変圧器について説明する。図1は、本発明の一実施形態に係る巻鉄心の一例を示す斜視図である。図2は、図1に示す巻鉄心が備えるコア部材を電磁鋼板の側面側からみた平面図である。図3は、図1に示す巻鉄心が備えるコア部材及び積層体の配置の一例を説明するための、コア部材の側面の一部を示す部分拡大平面図である。図4は、図1に示す巻鉄心が備える積層体の配置を説明するための説明図である。
以上、本発明の一実施形態を説明した。以下では、本発明の上記実施形態の幾つかの変形例を説明する。なお、以下に説明する各変形例は、単独で本発明の上記実施形態に適用されてもよいし、組み合わせで本発明の上記実施形態に適用されてもよい。また、各変形例は、本発明の上記実施形態で説明した構成に代えて適用されてもよいし、本発明の上記実施形態で説明した構成に対して追加的に適用されてもよい。
2、2A、2B コア部材
20 第1の電磁鋼板
21、21A、21B 辺部
22、22A、22B 屈曲部
23 隅部
24 角部
3 積層体
30 第2の電磁鋼板
4 治具
41 支持柱41
42 固定板
43 外板
44 内板
45 ボルト
46 ナット
50 歪領域
Claims (10)
- 第1の電磁鋼板が巻かれて形成され、側面から見て環状であって、側面から見て1以上の屈曲部を有するコア部材と、
第2の電磁鋼板が積層された1以上の積層体と、
を備え、
前記積層体は、前記コア部材の前記屈曲部における前記第1の電磁鋼板の側面で形成される面の少なくとも一方に、前記第2の電磁鋼板の側面で形成される面が沿うように配置されている、巻鉄心。 - 前記積層体の前記第2の電磁鋼板の積層面の方向は、前記コア部材の前記第1の電磁鋼板の積層面の方向に沿っている、請求項1に記載の巻鉄心。
- 前記コア部材を前記第1の電磁鋼板の面に沿う方向から見た側面の少なくとも一方において、前記屈曲部における内周部の中点と、前記屈曲部における外周部の中点と、を結ぶ直線に対する、前記第2の電磁鋼板の積層面の角度は、45度以上90度以下である、請求項1又は2に記載の巻鉄心。
- 前記コア部材は、前記コア部材を側面から見たときに角部を有する、請求項1~3のいずれか1項に記載の巻鉄心。
- 前記コア部材を側面から見たときの前記コア部材の形状は、八角形である、請求項1~4のいずれか1項に記載の巻鉄心。
- 前記第2の電磁鋼板の厚みは、前記第1の電磁鋼板の厚みと同一、または前記第1の電磁鋼板の厚みより小さい、請求項1~5のいずれか1項に記載の巻鉄心。
- 前記第1の電磁鋼板の厚みをT1、前記第2の電磁鋼板の厚みをT2とした時、T2/T1の比が0.5以上1.0以下である、請求項6に記載の巻鉄心。
- 前記第2の電磁鋼板は、互いに絶縁されている、請求項1~7のいずれか1項に記載の巻鉄心。
- 前記コア部材と前記積層体は、互いに絶縁されている、請求項1~8のいずれか1項に記載の巻鉄心。
- 第1の電磁鋼板が巻き回されて形成され、側面から見て環状であって、側面から見て1以上の屈曲部を有するコア部材と、
第2の電磁鋼板が積層された1以上の積層体と、
を備え、
前記積層体は、前記コア部材の前記屈曲部における前記第1の電磁鋼板の側面で形成される面の少なくとも一方に、前記第2の電磁鋼板の側面で形成される面が沿うように配置されている、変圧器。
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2019354345A AU2019354345A1 (en) | 2018-10-03 | 2019-10-03 | Wound core and transformer |
EP19869378.0A EP3863032A4 (en) | 2018-10-03 | 2019-10-03 | Wound core and transformer |
BR112021002652-5A BR112021002652A2 (pt) | 2018-10-03 | 2019-10-03 | núcleo magnético e transformador |
KR1020217002251A KR102541759B1 (ko) | 2018-10-03 | 2019-10-03 | 권철심 및 변압기 |
CN201980040771.4A CN112313762B (zh) | 2018-10-03 | 2019-10-03 | 卷铁芯及变压器 |
JP2020551088A JP7047931B2 (ja) | 2018-10-03 | 2019-10-03 | 巻鉄心及び変圧器 |
US17/273,142 US20210327631A1 (en) | 2018-10-03 | 2019-10-03 | Magnetic core and transformer |
RU2021108844A RU2760332C1 (ru) | 2018-10-03 | 2019-10-03 | Магнитный сердечник и трансформатор |
AU2022268384A AU2022268384A1 (en) | 2018-10-03 | 2022-11-11 | Wound core and transformer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018187874 | 2018-10-03 | ||
JP2018-187874 | 2018-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020071512A1 true WO2020071512A1 (ja) | 2020-04-09 |
Family
ID=70054661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/039206 WO2020071512A1 (ja) | 2018-10-03 | 2019-10-03 | 巻鉄心及び変圧器 |
Country Status (9)
Country | Link |
---|---|
US (1) | US20210327631A1 (ja) |
EP (1) | EP3863032A4 (ja) |
JP (1) | JP7047931B2 (ja) |
KR (1) | KR102541759B1 (ja) |
CN (1) | CN112313762B (ja) |
AU (2) | AU2019354345A1 (ja) |
BR (1) | BR112021002652A2 (ja) |
RU (1) | RU2760332C1 (ja) |
WO (1) | WO2020071512A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7318845B1 (ja) | 2022-03-03 | 2023-08-01 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
JP7318846B1 (ja) | 2022-03-03 | 2023-08-01 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
WO2023167016A1 (ja) * | 2022-03-03 | 2023-09-07 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
WO2023167015A1 (ja) * | 2022-03-03 | 2023-09-07 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6083307A (ja) * | 1983-10-14 | 1985-05-11 | Toshiba Corp | 巻鉄心型静止誘導電器 |
JPH10261536A (ja) * | 1997-03-17 | 1998-09-29 | Nippon Steel Corp | 三相変圧器積鉄心のヨーク締め付け方法 |
JP2005038987A (ja) | 2003-07-18 | 2005-02-10 | Nippon Steel Corp | 分離式トランス |
JP2017022189A (ja) | 2015-07-08 | 2017-01-26 | 株式会社日立製作所 | 積層鉄心および静止電磁機器 |
JP2017157806A (ja) | 2016-03-04 | 2017-09-07 | 新日鐵住金株式会社 | 巻鉄心および巻鉄心の製造方法 |
JP2017212261A (ja) * | 2016-05-23 | 2017-11-30 | 東芝産業機器システム株式会社 | 鉄心 |
JP2018032703A (ja) | 2016-08-24 | 2018-03-01 | 新日鐵住金株式会社 | トランス |
JP2018148036A (ja) * | 2017-03-06 | 2018-09-20 | 新日鐵住金株式会社 | 巻鉄心 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB731500A (en) * | 1952-07-25 | 1955-06-08 | British Thomson Houston Co Ltd | Improvements in and relating to magnetic cores |
US2909742A (en) * | 1953-09-01 | 1959-10-20 | Gen Electric | Machine wound magnetic core |
DE2723008A1 (de) * | 1977-05-21 | 1978-11-30 | Blum Eisen & Metallind | Lamellierter eisenkern fuer transformatoren, drosselspulen o.dgl. |
JPH0888128A (ja) * | 1994-09-19 | 1996-04-02 | Hitachi Ltd | 多相変圧器鉄心 |
JP3727454B2 (ja) * | 1997-10-30 | 2005-12-14 | 愛知電機株式会社 | アモルファス鉄心変圧器の製造方法 |
JP3244120B2 (ja) * | 1998-03-10 | 2002-01-07 | 日本電気株式会社 | エラー判別処理システム |
RU2266583C2 (ru) * | 2003-09-25 | 2005-12-20 | Общество с ограниченной ответственностью "Элсиб-У" (ООО "Элсиб-У") | Шихтованный магнитопровод трансформатора |
CN1897175B (zh) * | 2005-07-08 | 2012-07-18 | 株式会社日立产机系统 | 静止装置用铁芯和静止装置 |
EA011997B1 (ru) * | 2007-12-26 | 2009-06-30 | Производственное Республиканское Унитарное Предприятие "Минский Электротехнический Завод Имени В.И. Козлова" | Шихтованный магнитопровод индукционного аппарата и способ его изготовления |
US9013263B2 (en) * | 2008-09-03 | 2015-04-21 | Hitachi Industrial Equipment Systems Co., Ltd. | Wound iron core for static apparatus, amorphous transformer and coil winding frame for transformer |
JP2012134448A (ja) * | 2010-12-03 | 2012-07-12 | Hitachi Industrial Equipment Systems Co Ltd | アモルファス材を使用したリアクトル装置及びその製造方法 |
JP6083307B2 (ja) | 2013-04-11 | 2017-02-22 | シンフォニアテクノロジー株式会社 | 回転機 |
KR101594482B1 (ko) * | 2015-01-08 | 2016-02-17 | 주식회사 케이피일렉트릭 | 아몰퍼스 시트와 규소강 시트의 혼합 권철심형 변압기 |
KR20170083082A (ko) * | 2015-05-27 | 2017-07-17 | 가부시키가이샤 히다치 산키시스템 | 적철심 구조체, 및 이를 구비한 변압기 |
KR102221444B1 (ko) * | 2017-01-10 | 2021-03-02 | 닛폰세이테츠 가부시키가이샤 | 권철심, 및 그 제조 방법 |
-
2019
- 2019-10-03 CN CN201980040771.4A patent/CN112313762B/zh active Active
- 2019-10-03 BR BR112021002652-5A patent/BR112021002652A2/pt unknown
- 2019-10-03 EP EP19869378.0A patent/EP3863032A4/en active Pending
- 2019-10-03 WO PCT/JP2019/039206 patent/WO2020071512A1/ja unknown
- 2019-10-03 AU AU2019354345A patent/AU2019354345A1/en not_active Abandoned
- 2019-10-03 RU RU2021108844A patent/RU2760332C1/ru active
- 2019-10-03 US US17/273,142 patent/US20210327631A1/en active Pending
- 2019-10-03 JP JP2020551088A patent/JP7047931B2/ja active Active
- 2019-10-03 KR KR1020217002251A patent/KR102541759B1/ko active IP Right Grant
-
2022
- 2022-11-11 AU AU2022268384A patent/AU2022268384A1/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6083307A (ja) * | 1983-10-14 | 1985-05-11 | Toshiba Corp | 巻鉄心型静止誘導電器 |
JPH10261536A (ja) * | 1997-03-17 | 1998-09-29 | Nippon Steel Corp | 三相変圧器積鉄心のヨーク締め付け方法 |
JP2005038987A (ja) | 2003-07-18 | 2005-02-10 | Nippon Steel Corp | 分離式トランス |
JP2017022189A (ja) | 2015-07-08 | 2017-01-26 | 株式会社日立製作所 | 積層鉄心および静止電磁機器 |
JP2017157806A (ja) | 2016-03-04 | 2017-09-07 | 新日鐵住金株式会社 | 巻鉄心および巻鉄心の製造方法 |
JP2017212261A (ja) * | 2016-05-23 | 2017-11-30 | 東芝産業機器システム株式会社 | 鉄心 |
JP2018032703A (ja) | 2016-08-24 | 2018-03-01 | 新日鐵住金株式会社 | トランス |
JP2018148036A (ja) * | 2017-03-06 | 2018-09-20 | 新日鐵住金株式会社 | 巻鉄心 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3863032A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7318845B1 (ja) | 2022-03-03 | 2023-08-01 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
JP7318846B1 (ja) | 2022-03-03 | 2023-08-01 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
WO2023167016A1 (ja) * | 2022-03-03 | 2023-09-07 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
WO2023167015A1 (ja) * | 2022-03-03 | 2023-09-07 | Jfeスチール株式会社 | 三相三脚巻鉄心およびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP3863032A4 (en) | 2022-06-29 |
CN112313762A (zh) | 2021-02-02 |
AU2019354345A1 (en) | 2021-05-13 |
KR20210021578A (ko) | 2021-02-26 |
BR112021002652A2 (pt) | 2021-05-11 |
JP7047931B2 (ja) | 2022-04-05 |
AU2022268384A1 (en) | 2022-12-15 |
US20210327631A1 (en) | 2021-10-21 |
RU2760332C1 (ru) | 2021-11-24 |
JPWO2020071512A1 (ja) | 2021-09-02 |
KR102541759B1 (ko) | 2023-06-13 |
CN112313762B (zh) | 2024-02-09 |
EP3863032A1 (en) | 2021-08-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020071512A1 (ja) | 巻鉄心及び変圧器 | |
US20170103843A1 (en) | Wound iron core for static apparatus, amorphous transformer and coil winding frame for transformer | |
JP5544393B2 (ja) | 静止機器用巻鉄心、及びそれを有する静止機器 | |
JP5557797B2 (ja) | 巻線素子 | |
JP5127728B2 (ja) | 変圧器 | |
JP2015142095A (ja) | 静止誘導機器およびその製造方法 | |
JPS62222614A (ja) | 変圧器用珪素鋼−非晶質鋼複合鉄心 | |
JP5604059B2 (ja) | 額縁形鉄心 | |
US7471183B2 (en) | Transformer | |
WO2021166314A1 (ja) | 静止誘導機器および変圧器 | |
JP2019050327A (ja) | 内鉄型変圧器の鉄心 | |
TW201814743A (zh) | 磁芯片及磁芯 | |
WO2019013131A1 (ja) | プレーナ型トランス及びdcdcコンバータ | |
JP7288213B2 (ja) | 巻鉄心 | |
RU2796922C1 (ru) | Ленточный сердечник | |
JP2020072211A (ja) | 静止誘導機器用積層鉄心 | |
JP7149908B2 (ja) | 静止誘導機器 | |
JP2018186113A (ja) | 静止誘導電器 | |
JP6890210B2 (ja) | 静止機器 | |
JP2010123650A (ja) | リアクタ | |
JP2775221B2 (ja) | 変圧器の積鉄心 | |
JP2023043933A (ja) | 鉄心構造及び変圧器 | |
JP2023043934A (ja) | 鉄心構造及び変圧器 | |
JP2023043935A (ja) | 鉄心構造及び変圧器 | |
JP2019009379A (ja) | 変圧器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19869378 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2020551088 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20217002251 Country of ref document: KR Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112021002652 Country of ref document: BR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2019869378 Country of ref document: EP Effective date: 20210503 |
|
ENP | Entry into the national phase |
Ref document number: 112021002652 Country of ref document: BR Kind code of ref document: A2 Effective date: 20210211 |
|
ENP | Entry into the national phase |
Ref document number: 2019354345 Country of ref document: AU Date of ref document: 20191003 Kind code of ref document: A |