WO2016189767A1 - 積鉄心構造体、及びこれを備えた変圧器 - Google Patents
積鉄心構造体、及びこれを備えた変圧器 Download PDFInfo
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- WO2016189767A1 WO2016189767A1 PCT/JP2015/084231 JP2015084231W WO2016189767A1 WO 2016189767 A1 WO2016189767 A1 WO 2016189767A1 JP 2015084231 W JP2015084231 W JP 2015084231W WO 2016189767 A1 WO2016189767 A1 WO 2016189767A1
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- core
- iron core
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- 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
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- 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
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- 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
- H01F27/25—Magnetic cores made from strips or ribbons
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- 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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
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- 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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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- 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
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- 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
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
Definitions
- the present invention relates to a core structure and a transformer including the same.
- the core structure of the transformer is roughly divided into a wound core and a stacked core.
- Winding iron cores are mainly used in distribution transformers, and iron cores are used in small transformers for power electronics and large-capacity transformers that are larger than distribution transformers.
- Transformer core materials include silicon steel sheets and amorphous alloys. Amorphous transformers that use amorphous alloys for iron core materials are known as transformers with lower energy loss and better energy consumption than silicon steel plate transformers that use silicon steel plates for iron core materials. Yes.
- an iron core having a larger cross-sectional area is required for a large-capacity transformer, and the iron core width and laminated thickness are much larger than those of a normal transformer iron core.
- an amorphous alloy is a material having a thickness of about 1/10 that of a silicon steel plate, and the number of laminated layers becomes enormous in order to manufacture an iron core used for a large capacity transformer.
- the material width of the amorphous alloy that can be manufactured is narrower than the material width required for the iron core of the large-capacity transformer, and the variation of the material width to be supplied is small. Therefore, in order to manufacture a large capacity transformer with an amorphous material, the material width of the iron core may be insufficient.
- Patent Document 1 JP 2012-138469
- Patent Document 2 JP 2012-138469
- An amorphous transformer having an amorphous iron core formed of an amorphous material and having a lap portion arranged on the upper portion and self-standing substantially vertically in a state designated by the iron core supporting member, and a coil inserted into the amorphous iron core.
- the member includes an iron core support member that supports a side surface of the amorphous iron core and a corner portion support member that supports a corner portion of the iron core, and is integrated, and the iron core support member substantially extends along at least one side surface of the iron core. It is characterized by being arranged vertically ”, but it is described as a method for making a large-capacity transformer. Not disclosed.
- Patent Document 2 Japanese Patent Application Laid-Open No. 11-186082
- Patent Document 2 states that “amorphous whose work efficiency is improved by making it possible to easily form a unit polymer composed of a polymer of ribbons of an amorphous magnetic alloy foil.
- a method of manufacturing a laminated iron core is proposed in which a unit polymer 10 is formed by cutting a strip polymer formed by superposing strips of a plurality of amorphous magnetic alloy foils into a predetermined length.
- the unit polymer laminated block 11 is formed by stacking the units on the work table by taking the unit polymers 10 constituting the laminated block 11 in order from the top.
- leg portions and yoke portions of the core product and the structure of the core product made of an amorphous alloy is disclosed.
- a core which is formed by laminating it is not possible to produce a core of a large-capacity transformer.
- JP 2012-138469 A Japanese Patent Laid-Open No. 11-186082
- the present application includes a plurality of means for solving the above-mentioned problems.
- the stacked core structure of the present invention includes a plurality of stacked core blocks formed by stacking core materials, and the stacking direction is It is characterized by comprising a stacked iron core arranged side by side in different directions, a first frame body along the outer periphery of the stacked core, and a partition plate arranged between a plurality of stacked core blocks.
- a large-capacity transformer having a core structure can be easily manufactured using an amorphous alloy.
- Front view of the contents of the transformer of the first embodiment of the present invention Side view of the contents of the transformer of the first embodiment of the present invention
- the perspective view of the laminated body of the iron core used for the transformer of 1st Example of this invention Front view of the first laminated block of the iron core used in the transformer of the first embodiment of the present invention
- Front view of the second laminated block of the iron core used in the transformer of the first embodiment of the present invention The front view of the laminated body of the 1st laminated block and the 2nd laminated block of an iron core used for the transformer of the 1st example of the present invention.
- Sectional view of the legs of the iron core used in the transformer of the first embodiment of the present invention Sectional view of yoke part of iron core used in transformer of first embodiment of the present invention
- Front view of laminated core of second embodiment Front view of laminated core of third embodiment
- Front view of laminated core of fourth embodiment Sectional view of the legs of the iron core of the fifth embodiment
- Sectional view of the iron core of the sixth embodiment Sectional view of the legs of the iron core of the seventh embodiment
- Sectional view of the yoke part of the iron core of the eighth embodiment Sectional view of the legs of the iron core of the ninth embodiment
- Example 1 of the present invention will be described with reference to FIGS. 1 and 2 illustrate the internal structure of the transformer of the first embodiment.
- the content structure of the transformer of the present invention includes an iron core 100, a coil 200, an upper clamp 300, a lower clamp 400, an iron core fixing bracket 500, a clamp tightening stud 600, and a base 700.
- the iron core fixing bracket 500 is a cylindrical member having a quadrangular cross section surrounding the periphery of the laminated iron cores 100 and is disposed so as to penetrate the coil 200.
- the upper clamp 300 and the lower clamp 400 are tightened by the clamp tightening stud 600 to fix the iron core 100 arranged in the iron core fixing bracket 500.
- the iron core fixing bracket 500 is fixed to the upper clamp 300 and the lower clamp 400 with bolts.
- the lower clamp 400 is fixed to the base 700 arranged at the lowest position with bolts.
- FIG. 3 (a) is a perspective view of the iron core 100 shown in FIG. 1, in which the coil 200, the upper clamp 300, the lower clamp 400, the iron core fixing bracket 500, and the base 700 are removed.
- the iron core 100 is configured by arranging an iron core material 107 having a predetermined width and an iron core material 108 in parallel, and a plurality of plate-like iron core materials are laminated in the Y-axis direction.
- a thin material such as an amorphous alloy material
- a stack of about 15 to 20 sheets is defined as one stack unit (hereinafter referred to as a stack block).
- the iron core 100 is configured by stacking.
- a material boundary partition 900 that is a plate-like member is sandwiched between the core material 107 and the core material 108 and between the core material 110 and the core material 111.
- a plurality of laminated blocks are laminated to constitute the iron core 100, and a laminated surface partition 800, which is a plate-like member, is sandwiched between parts of the laminated blocks. Details regarding the material boundary partition 900 and the laminated surface partition 800 will be described later with reference to FIG.
- the iron core 100 is a part of three iron core legs and connects the core portion (the periphery of the cross section A) disposed inside the coil 200 in FIGS. It consists of a yoke part (periphery of the cross section B) fixed by the lower clamp 400.
- the core part is a part of the iron core members 107, 108, 110, and 111 and is disposed inside the coil 200
- the yoke part is the iron core members 101, 102, 104, and 105. means. Details of the core portion will be described later with reference to FIG. 4, and details of the yoke portion will be described later with reference to FIG.
- FIG. 3 (b) is a front view of the first laminated block
- FIG. 3 (c) is a front view of the second laminated block laminated adjacent to the first laminated block.
- FIG.3 (d) is a front view which shows the state which accumulated FIG.3 (b) and FIG.3 (c).
- the material boundary partition 900 is omitted, but the material boundary partition 900 is provided between each of the iron core materials 101 and 102, 104 and 105, 107 and 108, and 110 and 111. Inserted.
- each laminated block is constituted by laminating, for example, about 15 to 20 pieces of the same core material in the depth direction of the drawing.
- FIG. 3 (b) and FIG. 3 (c) are in an inverted relationship.
- the iron core 100 in FIG. 3 (a) is obtained by laminating a plurality of FIG. 3 (d) and inserting a material boundary partition 800 and a laminated surface partition 900. It is configured by alternately laminating 3 (c) laminated blocks.
- the first and second laminated blocks are laminated so that the boundary between the iron core material 110 and the iron core material 111 is in a straight line, and the iron core material 107 and the iron core material 108 are laminated.
- the first and second laminated blocks are laminated so that the boundary portion of the first and second laminated blocks is in a straight line, the first and second laminated blocks are shifted by a predetermined width at the position of the joint 115.
- the amount of deviation is determined in accordance with the shape of the central iron core leg, and is, for example, about a dozen mm, and can be arbitrarily selected according to the design specifications.
- the joint 115 between the core material 111 of the central core leg and the core material 101 of the yoke part is 45 degrees with respect to the extending direction (Z-axis direction) of the core material 111 of the central core leg.
- the angle of the joint 115 is not limited to this.
- the two core materials 101 arranged on the left and right sides of the core material 110 and the core material 111 constituting the center core leg are divided into two members by the presence of the center core leg. ing.
- the joint portion 115 is formed at an angle of 60 degrees with respect to the direction in which the iron core material 111 extends (Z-axis direction)
- the iron core material 101 is not divided and can be a single connected member.
- the assemblability of the upper yoke portion is improved.
- the angle of the joint portion 115 can be changed in consideration of the workability of the upper yoke portion, and the angles on the inner peripheral side and the outer peripheral side can be different. For example, by making the inner circumference side at an angle that increases the magnetic resistance, the magnetic flux concentrated on the inner circumference can be moved to the outer circumference side, and the magnetic flux of the iron core leg can be made uniform.
- the amorphous alloy is much thinner than the silicon steel plate, and the thickness tends to be uneven. Therefore, it is possible to increase the flatness of the laminated block by combining the thick and thin portions well. It is also possible to obtain the required flatness by inserting a thin insulating material or silicon steel plate between the laminated blocks.
- FIG. 4 shows a cross-sectional view of section A in FIG.
- a stacked surface partition 800 having a plane parallel to the core material is disposed.
- a plate-shaped material boundary partition 900 is disposed between the laminated block of the iron core material 107 and the laminated block of the iron core material 108.
- the laminated surface partition 800 and the material boundary partition 900 are made of an insulating material or a metal that is insulated with a varnish or the like.
- the outer periphery of the iron core material 107 and the iron core material 108 is surrounded by an iron core fixing bracket 500 (not shown in FIG. 3A).
- the iron core fixing bracket 500 is formed of a high strength material such as iron or epoxy resin.
- the iron core 100 is formed by laminating the iron core material 107 and the iron core material 108 along the iron core fixing bracket 500 and the material boundary partition 900.
- the end face of the amorphous alloy tends to be uneven as compared with the end face of the silicon steel sheet that has been slit. Therefore, the laminating workability can be improved by disposing the material boundary partition 900 and the iron core fixing bracket 500 that serve as guide members on both sides of the iron core as in this embodiment.
- the end surfaces of the joint portion 115 can be neatly arranged, the loss at the joint portion 115 can be suppressed and the iron core characteristics can be improved.
- the laminated surface partition 800 can serve as a reference surface when laminating iron cores, and can also serve as a core in the laminating direction, so that the strength of the iron core legs can be increased, The iron core is strong against vibration during transportation.
- the iron core fixing bracket 500 is a conductor such as iron, it is necessary to consider that the circuit in the same direction as the coil is not formed by the laminated surface partition 800, but these considerations are not necessary if it is made of an insulating material. . Further, even if it is constituted by a conductor, it is sufficient that it is divided at at least one location, and the laminated surface partition 800 can be arranged at an arbitrary position in the lamination direction (Y direction) other than the drawing.
- varnish By applying varnish to the contact area with the core fixing bracket 500, laminated surface partition 800, and material boundary partition 900 at the time of lamination work, it can be fixed to some extent in the drying process after assembly, resulting in a higher strength configuration. it can.
- FIG. 5 shows a cross-sectional view of the cross section B of FIG.
- the outer periphery of the iron core material 104 and the iron core material 105 is surrounded by an iron core fixing bracket 500 (not shown in FIG. 3A).
- the tightening in the stacking direction is performed by a lower clamp 400 not shown in FIG.
- amorphous alloy iron core it is not possible to expect an increase in strength by tightening as in the case of a silicon steel plate, but excessive tightening causes a significant deterioration in properties. Therefore, it is necessary to have a structure that does not depend on the strength of the iron core so that it can withstand the safety of assembly work and transport.
- the core fixing bracket 500 and the material boundary partition 900 of the present invention also have a function of preventing over-tightening by the upper clamp 300 or the lower clamp 400, and the dimensions are set so that tightening from both sides in the stacking direction becomes an appropriate dimension. It is determined.
- the lower clamp 400 has a fixing portion to the base 700 located at the lower part of the contents structure, and is fixed by a bolt.
- a gap 1000 between the base 700 and the iron core fixing bracket 500 is filled with an insulating material such as a press board to prevent downward movement.
- FIG. 6 shows only the iron core fixed structure extracted from Figure 1.
- iron core fixing bracket 500 At the upper and lower ends of the iron core fixing bracket 500, there are provided iron core fixing metal fitting coupling portions 503 for connecting the upper metal fitting 300 and the lower metal fitting 400. As shown in FIG. Fastened with bolts to 400.
- the coil 200 is disposed at a position between the upper and lower iron core fixing bracket fasteners 503.
- the procedure for stacking iron cores will be explained. Since the upper yoke portion is formed last, first, the upper fastening hardware 300, the lower fastening hardware 400, and the iron core fixing hardware 500 that are the skeleton are fastened with bolts for the other parts.
- the fastening of the lower clamp and the iron core fixing bracket 500 will be described as an example.
- the lower clamp is arranged on both sides of the iron core 100. First, one of the lower clamps is clamped.
- the metal fitting, for example, the left lower metal fitting 400 and the iron core fixing metal 500 are fastened with bolts.
- FIG. 5 has already stood up, the lower clamp 400 and the iron core fixing bracket 500 on the left in FIG.
- the core material is laminated from above (corresponding to the right side in the standing state of FIG. 5) using the core fixing bracket 500 as a guide member. Thereafter, the other lower clamp is attached, and both lower clamps 400 are tightened with the clamp clamp stud 600 (see FIG. 1). Similarly, the core portion is laminated, and then the core portion is reversed 90 degrees with a reversing machine so that the coil 200 can be inserted, and the coil 200 is inserted.
- FIG. 6 if the members of the iron core fixing bracket 500 in the region disposed in the yoke portion are 501, and the members in the region disposed in the core portion are iron core fixing bracket members 502, the dimension adjustment is performed between 501 and 502. For this reason, an insulating material such as a press board is sandwiched, but this position may be welded to form an integral structure of 501 and 502.
- a cylindrical stopper for preventing over-tightening may be disposed on the clamp fastening stud 600, and the structural strength may be improved by expanding the cross-sectional area of the cylinder and increasing the contact area.
- the lamination of the upper yoke part will be described.
- the respective iron cores need to be accurately arranged with respect to each other.
- each amorphous alloy is very thin, the laminated block of the amorphous alloy is liable to bend and the laminated body to be broken, and the workability is low as it is. Therefore, an iron plate guide member having a thickness of 1 mm or less is disposed on the outermost periphery in the stacking direction of the yoke portion iron core, and the yoke portion iron core is sandwiched between the iron plate guide members.
- the iron plate guide member may be a member having a length substantially equal to that of the yoke portion iron core in order to stabilize the entire yoke portion iron core, or may be a short iron plate guide member disposed only around the joint 115. .
- Assembling work is performed on the inner core first, then the material boundary partition 900 is placed, and finally the outer core is worked.
- the iron plate guide member is not removed until the insertion of the laminated body of several blocks is completed, but is removed after the amorphous alloy is stabilized to a certain degree of laminated thickness. Repeat this process to insert all blocks.
- a PET resin film having a thickness of about 0.05 mm can be used as a guide.
- the blocks of the upper yoke so that they protrude from the yoke iron core by about 1 mm in the longitudinal direction of the yoke iron core, and the joint 115 is protruded from the film.
- this guide can be sandwiched in advance when the core is laminated.
- the upper yoke part As another method of stabilizing the upper yoke part during assembly work, there is a method of resin coating around the joint part. A small amount of coating material is applied to each of the laminated blocks on the end surfaces of the yoke cores that have been cut and laminated.
- the coating material a soft resin with as little characteristic deterioration as possible is preferable, but a hard material may be used although the characteristic deterioration is large depending on the working environment and the size of the iron core.
- FIG. 7 shows a front view of the iron core 100 in the second embodiment of the present invention. Similar to FIG. 3d of the first embodiment, two core laminates of iron core materials 107 and 108, 101 and 102, 104 and 105 are arranged side by side, and the first laminated block and the second laminated block are laminated. Yes.
- the difference from the first embodiment is that the material widths of the iron core materials 107 and 108 are different from each other.
- 101 and 102 and 104 and 105 have different material widths.
- the laminated block of the core material 110 having a small material width and the laminated block of the iron core material 111 having a large material width are arranged in parallel, and these are the same as in the first embodiment.
- the stacked blocks are stacked with the left and right being interchanged.
- the core material 111 having a large material width is overlapped by a predetermined width between stacked blocks adjacent in the stacking direction.
- a region between the boundary line between the iron core materials 110 and 111 in the first laminated block and the boundary line between the iron core materials 110 and 111 in the second laminated block is an overlap margin 117 of the iron core material 111.
- the material margin partition 900 cannot be placed on the central core leg due to the overlap margin 117. However, since the overlap margin 117 functions like an axis, the core leg can be omitted even if the material boundary partition 900 is omitted. Strength is ensured.
- This overlap margin 117 is a difference in material width between the materials 107 and 108, 101 and 102, 104 and 105, and 110 and 111. For the purpose of omitting the material boundary partition 900, it can be arbitrarily selected according to the shape of the iron core.
- the example in which the core materials 110 and 111 used in the first laminated block are turned over as they are and used in the second laminated block has been described.
- the shape of the iron core material constituting the second laminated block is different from the iron core materials 110 and 111 constituting the first laminated block.
- the boundary portion of the iron core material can be aligned between the first laminated block and the second laminated block.
- the material boundary partition 900 can be inserted into this boundary portion.
- the core material having a wide material width is used for the core materials 101 and 104 on the inner peripheral side, and the core material having a narrow material width is disposed on the core materials 102 and 105 on the outer peripheral side, thereby implementing the first embodiment.
- the core materials 101 and 104 that are completely divided can be formed as one member.
- the amorphous alloy has poorer properties as the material width is larger.
- the magnetic flux concentrated on the inner circumference side can be dispersed on the outer circumference side, and the effect of improving the characteristics by uniformizing the magnetic flux of the iron core legs can be obtained. It is done.
- FIG. 8 shows a front view of the iron core 100 in the third embodiment of the present invention. Similar to FIG. 3d of the first embodiment and FIG. 7 of the second embodiment, two core laminates of iron core materials 107 and 108, 101 and 102, and 104 and 105 are arranged side by side, Two laminated blocks are laminated.
- the core materials 110 and 111 constituting the central core leg have the same width, whereas the core materials 107 and 108 constituting the outer core leg and the core materials 101 and 102 of the yoke part are different from each other. It is wide.
- the center core leg is composed of a combination of two cores of the two different widths that make up the outer core leg, so the center core leg is better than the outer core leg.
- the core cross-sectional area is large. Since the central core leg is disposed between the core legs on both sides and the coil 200, heat is easily generated and it is harder to cool than the core legs on both sides. If the core temperature rises without sufficiently cooling the core, the properties of the core will deteriorate.
- the load applied to the central core leg is reduced by making the cross-sectional area of the central core leg, which is likely to cause characteristic deterioration due to temperature rise, wider than the core legs on both sides, and the characteristic deterioration in the central core leg is reduced. Is suppressed.
- the core cross-sectional area is made larger than that of the outer core leg, but conversely, two core materials with narrow material width are combined with the outer core leg.
- the core cross-sectional area can be made smaller than that of the central core leg.
- FIG. 9 shows a front view of the iron core 100 in the fourth embodiment of the present invention.
- three iron core materials are arranged side by side, and the first laminated block and the second laminated block are laminated.
- the iron core leg in the center is made of iron core material 110 ⁇ 112. If the core materials 110 and 112 having the same shape are also used, the type of material can be suppressed and the manufacturing cost can be suppressed.
- FIG. 9 shows an example in which three iron cores having the same material width are arranged side by side, iron core materials having different widths can be used in part.
- An iron core 100 configured by arranging four or more iron core materials is also an example of an embodiment of the present invention. It is an example of the present invention that at least some of the material widths are different widths.
- FIG. 10 shows a sectional view of the core leg of the core 100 in the fifth embodiment of the present invention.
- the iron core 100 shown in FIG. 4 has a large gap between the coil 200 and the iron core fixing bracket 500, and the ratio of the iron core area (space factor) to the inside of the coil is low. End up. Therefore, in this example, the width of the iron core material located near the center of the lamination direction (Y-axis direction) with the iron core 100 is made wider than the width of the iron core material arranged outside the lamination direction (Y-axis direction). ing. With this configuration, since the cross-sectional shape of the iron core 100 is close to the cylindrical shape of the coil, the gap between the coil 200 and the iron core fixing bracket 500 can be reduced, and the space factor can be increased.
- FIG. 11 An example in which three or more types of iron core widths are used as shown in FIG. 11 is also a part of this embodiment.
- the space factor can be further increased by combining the iron cores having a larger width and bringing the cross-sectional shape of the iron core closer to a circle.
- the structure of the iron core is complicated and the assemblability is deteriorated.
- the iron core fixing bracket 500 as a guide for the iron core laminating work as in the present invention, the assemblability is improved. The decrease can be suppressed. Moreover, the reinforcement effect is also obtained after lamination.
- FIG. 11 shows a sectional view of the core leg of the core 100 in the sixth embodiment of the present invention.
- the outer shape of the iron core is made closer to the cylindrical shape of the coil 200 by varying the iron core width according to the position of the lamination method (Y-axis direction).
- the outermost periphery in the stacking direction is composed of a single stacked block, and a plurality of stacked blocks are not arranged in the X-axis direction. For this reason, the material boundary partition 900 does not reach the outermost periphery in the stacking direction (Y-axis direction).
- the iron core fixing bracket 500 has a multistage shape along the outer shape of the iron core.
- the material width is clearly different between the outermost laminated block in the laminating direction (Y-axis direction) and the innermost laminated block, and the tightening weight applied from the outermost laminated block side is the inner laminated layer. It has a structure that is received only in a partial area of the block. In order to reduce this bias in weight, for example, an iron plate, silicon steel plate, thick press board, etc. wider than the inner laminated block area must be inserted between the outermost laminated block and the inner laminated block. You can also.
- the size of the circumscribed circle of the iron core fixing bracket 500 is made slightly larger than the inner circumference of the coil 200, and it is possible to maintain a good contact state after insertion by inserting it while deforming contact when inserting the coil.
- This dimension adjustment is also adjusted by the dimensions of the coil inner peripheral bobbin after drying and lubrication, but can be within a range of, for example, 1 mm.
- the bobbin is preferably a metal such as iron from the viewpoint of strength.
- the bobbin placed on the inner circumference of the coil is inserted into the coil by inserting a groove with the same shape as the corner at the position corresponding to the corner of the core fixing bracket 500 after inserting the core. It can function as an insertion guide. Further, after the core is inserted, a function of fixing the core can be provided.
- the bobbin in this case is preferably a press board having a thickness of about 3 mm, for example.
- FIG. 12 is a cross-sectional view of the iron core leg of the iron core 100 according to the seventh embodiment of the present invention.
- a cylindrical peripheral fixing material 1100 is arranged around the iron core fixing bracket 500 of FIG.
- the peripheral fixing material 1100 is formed in a substantially circular shape by connecting two semicircular members on an extension line of the material boundary partition 900.
- a press board or an iron plate is desirable for an oil-filled transformer, and plastic, resin, or insulating paper is desirable for a molded transformer.
- plastic, resin, or insulating paper is desirable for a molded transformer.
- One member may be used. Even a hard and thick material such as an iron plate or press board that cannot be opened and closed by human power can be made into a single member with a substantially cylindrical shape as long as it has an opening enough to contain the core material. is there.
- This peripheral fixing material 1100 is fixed by being sandwiched and fixed between the outermost periphery of the iron core 100 in the stacking direction (Y-axis direction) and the upper fastener 300 or the lower fastener 400 in the yoke portion, and no fastener such as the core portion is disposed. Is fixed with an insulating tape or the like in the circumferential direction. If this embodiment is adopted in a molded transformer in which the appearance is particularly important, the joint surface and the internal structure can be hidden. Further, dust and dust can be prevented from accumulating on the surface of the iron core 100 and the outer peripheral surface of the iron core fixing bracket 500. There is also a soundproofing effect.
- the outer periphery of the peripheral fixing material 1100 has a shape along the inner periphery of the coil 200, the iron core 100 and the coil 200 can be firmly connected even if the outer periphery of the iron core 100 is not completely circular. And can be fixed. Moreover, in an oil-filled transformer, the deviation
- FIG. 13 shows a cross-sectional view of the iron core at the yoke portion of the iron core 100 according to the eighth embodiment of the present invention.
- an iron core fixing material 1200 made of an insulating material is disposed, and an outer periphery fixing material 1100 having an arc shape welded to the upper clamp 300 and the lower clamp 400 on the outer side. , Thereby fixing the iron core 100.
- the surrounding fixing material 1100 is made of iron because it is welded.
- the laminated surface partition 800 in this embodiment is made of an insulating material, and is sandwiched and fixed by the boundary portion 1300 of the surrounding fixing material 1100. Therefore, the surrounding fixing material 1100 does not form a circuit.
- the laminated surface partition 800 is made of a material that is not an insulating material, do not configure the circuit by a varnish treatment near the contact portion between the surrounding fixing material 1100 and the laminated surface partition 800, or by newly inserting an insulating material. It can also be.
- the surrounding fixing material 1100 may be partially arranged according to the size of the iron core 100.
- the flat portion in contact with the upper clamp 300 and the lower clamp 400 becomes narrower.
- the surrounding fixing material 1100, the upper clamp 300, and the lower clamp 400 are welded and fixed, the iron core can be firmly clamped and fixed even when the plane portion is narrow.
- FIG. 14 shows a cross-sectional view of the iron core 100 in the ninth embodiment of the present invention.
- the laminated surface partitions 800 are arranged at a plurality of locations in the lamination method, and the laminated surface partitions 800 are inserted into positions corresponding to the laminated surface partitions 800 of the peripheral fixing material 1100 formed into a circular shape. Are provided with holes or grooves.
- the laminated surface partition 800 and the surrounding fixing material 1100 are fitted and fixed, whereby the core material can be fixed.
- the perimeter fixing bracket 1400 disposed on the outer periphery of the perimeter fixing material 1100 has a hole formed only at a position corresponding to the laminated surface partition 800 disposed near the center in the stacking direction (Y-axis direction).
- a laminated surface partition 800 is inserted. Whether or not the surrounding fixing bracket 1400 is fixed with the inserted laminated surface partition 800 interposed therebetween depends on the strength of the laminated surface partition 800 and can be arbitrarily selected.
- an iron core of an amorphous alloy As an example.
- the present invention is not necessarily limited to this, and can also be applied to a iron core of a silicon steel plate.
- a combination of an amorphous alloy and a silicon steel plate is also applicable.
- the reinforcing effect of the iron core and the productivity improvement effect are greater than in the case of the iron core of a silicon steel plate.
- a silicon steel plate can also be used for the laminated surface partition 800, and thereby strength can be improved.
- silicon steel plates of the same material width are arranged on the front and back of the laminated surface of the laminated block of amorphous alloy, and the amorphous leg is sandwiched between the upper yokes to further increase the strength of the iron core legs. It may be possible to improve the part insertion workability. When the materials are combined in this way, the characteristics can be improved by reducing the proportion of the silicon steel sheet. For example, if 20 sheets of amorphous alloy are arranged with silicon steel sheets on both sides, about half of the entire iron core will be silicon steel sheets, so there will be more iron loss than 100% amorphous alloy. Become.
- the ratio of the silicon steel sheet is suppressed within 10% of the total thickness, the iron loss can be suppressed to about + 30% with respect to the characteristics of the 100% amorphous alloy.
- the ratio of the silicon steel sheet depends on the required iron core strength, for example, the silicon steel sheet is blended every 10 blocks of the laminated block of amorphous alloy. Further, in consideration of workability, it may be limited to only the upper yoke portion, or a silicon steel plate may be adopted for the other leg portions.
- the iron core 100 As a method of fixing the iron core 100, it is also possible to fix the upper clamp 300, the lower clamp 400, the iron core clamp 500 and the core and yoke by making a round hole and inserting an insulated round bar. It is. According to this, for example, it is possible to fix more firmly while omitting the gap filling of the gap 1000 in FIG.
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Abstract
Description
鉄心固定金具500が鉄などの導体の場合には、積層面仕切り800によりコイルと同方向の回路が形成しないように配慮する必要があるが、絶縁材で構成すればこれらの配慮は不要である。また、導体で構成されている場合であっても少なくとも1箇所で区切れていればよく、図示以外の積層方向(Y方向)の任意の位置に積層面仕切り800を配置することができる。
この周囲固定材1100は、ヨーク部においては鉄心100の積層方向(Y軸方向)最外周と上締金具300又は下締金具400とで挟まれて固定され、コア部など締金具が配置されない位置においては、周方向に渡って絶縁性のテープ等で固定する。特に外観が重要となるモールド変圧器において本実施例を採用すれば、接合面や内部構造を隠すことができる。またちりやほこりが鉄心100の表面や鉄心固定金具500外周面に堆積することを抑制できる。さらに防音効果もある。
周囲固定金具1400で、挿入された積層面仕切り800を挟んで固定するか否かは積層面仕切り800の強度次第であり、任意に選択できる。
115 接合部
117 重なり代
200 コイル
300 上締金具
400 下締金具
500 鉄心固定金具
501 鉄心固定金具 ヨーク部
502 鉄心固定金具 コア部
503 鉄心固定金具 締金具連結部
600 締金具締付スタッド
700 ベース
800 積層面仕切り
900 材料境界仕切り
1000 隙間
1100 周囲固定材
1200 鉄心固定材
1300 境界部
1400 周囲固定金具
Claims (16)
- 複数の鉄心を積層して構成した積鉄心ブロックの複数を、積層方向とは異なる方向に並べて配置したことを特徴とする積鉄心構造体。
- 鉄心材料を積層して構成した積鉄心ブロックの複数を、積層方向とは異なる方向に並べて構成された積鉄心と、
前記積鉄心の外周に沿う第一の枠体と、
前記複数の積鉄心ブロックの間に配置される仕切り板と、を備えることを特徴とする積鉄心構造体。 - 非晶質合金の積鉄心構造体であって、
非晶質合金の鉄心材料を積層して構成した積鉄心ブロックの複数を、積層方向とは異なる方向に並べて構成された積鉄心と、
前記積鉄心の外周に沿う第一の枠体と、
前記複数の積鉄心ブロックの間に配置される仕切り板と、を備えることを特徴とする非晶質合金の積鉄心構造体。 - 請求項2又は3記載の積鉄心構造体であって、
前記積鉄心は、前記積鉄心を構成する積鉄心ブロックの積層方向の間に、該積鉄心ブロックとは異なる材質からなる板状部材が配置されていることを特徴とする変圧器。 - 請求項2乃至4のいずれかに記載の積鉄心構造体であって、
前記積鉄心を構成する複数の積鉄心ブロックは、少なくとも2種類の材料幅を有することを特徴とする積鉄心構造体。 - 請求項2乃至5のいずれか記載の積鉄心構造体であって、
前記積鉄心は、少なくとも3つ以上の脚部鉄心を備え、該脚部鉄心のうち外側の脚部鉄心の鉄心断面積が内側の脚部鉄心の断面積よりも小さいことを特徴とする積鉄心構造体。 - 請求項5又は6記載の積鉄心構造体であって、
外側鉄心脚を構成する複数の積鉄心ブロックのうちの内側の積鉄心ブロックは、外側の積鉄心ブロックよりも材料幅が広いことを特徴とする積鉄心構造体。 - 請求項5乃至7のいずれか記載の積鉄心構造体であって、
ヨーク部鉄心を構成する複数の積鉄心ブロックのうちの内側の積鉄心ブロックは、外側の積鉄心ブロックよりも材料幅が広いことを特徴とする積鉄心構造体。 - 請求項5乃至8のいずれか記載の積鉄心構造体であって、
前記積鉄心は、少なくとも3つ以上の脚部鉄心を備え、内側の鉄心脚が重なり代を備えていることを特徴とする積鉄心構造体。 - 請求項5乃至9のいずれか記載の積鉄心構造体であって、
前記積鉄心は、少なくとも3つ以上の脚部鉄心を備え、
該脚部鉄心とヨーク部鉄心との接合境界部が延びる方向は、該脚部鉄心が延びる方向との成す角が45度となるよう構成されていることを特徴とする積鉄心構造体。 - 請求項2乃至10のいずれか記載の積鉄心構造体であって、
前記積鉄心は、積層方向の中央付近に材料幅の広い積層ブロックを配置し、積層方向の外周側になるにつれて材料幅がより狭い積層ブロックを配置したことを特徴とする積鉄心構造体。 - 請求項2乃至10記載の積鉄心構造体であって、
前記積鉄心は、積層方向の中央付近ではより多くの数の積層ブロックを並べて配置し、積層方向の外周側ではより少ない数の積層ブロックを並べて配置したことを特徴とする積鉄心構造体。 - 請求項2乃至10記載の積鉄心構造体であって、
更に、コイルの内周形状に倣った形状の第二の枠体を備えることを特徴とする積鉄心構造体。 - 請求項12記載の積鉄心構造体であって、
前記第二の枠体は、締金具と溶接されていることを特徴とする積鉄心構造体。 - 請求項4記載の積鉄心構造体であって、
更に、コイルの内周形状に倣った形状の第二の枠体を備え、該第二の枠体の一部に溝が形成されており、該溝に前記板状部材が挿入されて固定されていることを特徴とする積鉄心構造体。 - 請求項1乃至15のいずれか記載の積鉄心構造体と、該構造体の鉄心脚部周辺に配置したコイルと、該構造体を固定する固定金具とを備えたことを特徴とする変圧器。
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JP2017520206A JP6359767B2 (ja) | 2015-05-27 | 2015-12-07 | 積鉄心構造体、及びこれを備えた変圧器 |
CN201580070581.9A CN107112113B (zh) | 2015-05-27 | 2015-12-07 | 叠铁芯构造体、以及具备该叠铁芯构造体的变压器 |
EP15893399.4A EP3306626A4 (en) | 2015-05-27 | 2015-12-07 | STACKED CORE STRUCTURE AND TRANSFORMER EQUIPPED WITH SAME |
KR1020177015442A KR20170083082A (ko) | 2015-05-27 | 2015-12-07 | 적철심 구조체, 및 이를 구비한 변압기 |
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JP2020115523A (ja) * | 2019-01-18 | 2020-07-30 | 株式会社日立製作所 | 静止誘導電器用鉄心 |
JP2020123683A (ja) * | 2019-01-31 | 2020-08-13 | 株式会社日立製作所 | 静止誘導電器 |
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US20170352466A1 (en) | 2017-12-07 |
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JP2018174341A (ja) | 2018-11-08 |
CN110189898A (zh) | 2019-08-30 |
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