WO2020017257A1 - Transformateur et noyau de fer feuilleté - Google Patents

Transformateur et noyau de fer feuilleté Download PDF

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Publication number
WO2020017257A1
WO2020017257A1 PCT/JP2019/025148 JP2019025148W WO2020017257A1 WO 2020017257 A1 WO2020017257 A1 WO 2020017257A1 JP 2019025148 W JP2019025148 W JP 2019025148W WO 2020017257 A1 WO2020017257 A1 WO 2020017257A1
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WO
WIPO (PCT)
Prior art keywords
leg
yoke
iron core
width
transformer
Prior art date
Application number
PCT/JP2019/025148
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English (en)
Japanese (ja)
Inventor
千絵 小林
佐藤　孝平
賢治 中ノ上
高橋　俊明
浩司 三本
栗田　直幸
Original Assignee
株式会社日立産機システム
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立産機システム filed Critical 株式会社日立産機システム
Publication of WO2020017257A1 publication Critical patent/WO2020017257A1/fr

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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
    • 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
    • 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
    • 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 transformer and a core, and more particularly to a core and a transformer suitable for a stationary induction device such as a transformer or a reactor.
  • Silicon steel plates with low loss and high magnetic permeability have been used as core materials for transformers.In recent years, however, silicon steel plates have been replaced with core materials for transformers due to the growing need for energy savings due to increased energy consumption.
  • Demand for a highly efficient transformer using an iron-based amorphous alloy (hereinafter, referred to as an amorphous transformer) is increasing.
  • the amorphous magnetic ribbon used for the iron core of the amorphous transformer is manufactured by rapidly quenching a melt of a magnetic alloy.
  • the cut amorphous magnetic ribbons are laminated so that the lamination surface forms a U-shape, a winding is inserted, and then a butt joint or a wrap is formed.
  • a wound iron core that forms a closed magnetic circuit is manufactured by alternately overlapping left and right amorphous magnetic ribbons by a method called a joint.
  • a step of performing annealing in a magnetic field with the iron core formed is included in order to remove the influence of stress caused by the laminating operation of the amorphous magnetic ribbon.
  • a step of covering the amorphous wound iron core with insulating paper or coating the laminated surface of the iron core with a resin is inserted, inserted into the winding, and formed as a transformer.
  • Patent Document 1 proposes a structure in which a fastener is used as a holding member and a through hole is provided in the magnetic ribbon to connect the stacked iron core in which the amorphous magnetic ribbons are stacked, thereby maintaining the core shape.
  • Patent Literature 1 After inserting the winding, the iron core of one yoke portion is assembled, and a method of winding the winding around the iron core has to be taken without considering insertion iron work. Therefore, the number of work steps may increase.
  • a preferred example of the present invention includes a first yoke, a first leg and a second leg connected to the first yoke, and a connection to the first leg and the second leg.
  • a transformer having an iron core having a second yoke and a fastener for supporting the iron core, The fastener is A first leg clamping member corresponding to the first leg and a second leg clamping corresponding to the second leg are supported by a clamping member so as to sandwich the lamination direction of the iron core.
  • the member and a second yoke tightening member corresponding to the second yoke are connected, and a width of the first leg tightening member is larger than an iron core width of the first leg,
  • the width of the leg tightening member is larger than the iron core width of the second leg, and the width of the second yoke tightening member is larger than the iron core width of the second yoke.
  • the first yoke tightening member is configured to have an open end in the center, The other of the fasteners, Another width corresponding to the first yoke, the width being larger than the core width of the first yoke, wherein the first leg fastening member and the second leg fastening member are separable.
  • 9 is a transformer having a first yoke fastening member.
  • Another preferred embodiment of the present invention is a first yoke, a first leg and a second leg connected to the first yoke, the first leg and the second leg.
  • An iron core having a second yoke connected to, and a fastener for supporting the iron core,
  • the fastener is A first leg clamping member corresponding to the first leg and a second leg clamping corresponding to the second leg are supported by a clamping member so as to sandwich the lamination direction of the iron core.
  • the member and a second yoke tightening member corresponding to the second yoke are connected, and a width of the first leg tightening member is larger than an iron core width of the first leg,
  • the width of the leg tightening member is larger than the core width of the second leg, and the width of the second yoke tightening member is larger than the core width of the second yoke,
  • the first yoke tightening member is configured to have an open end in a central portion, The other of the fasteners, Another width corresponding to the first yoke, the width being larger than the iron core width of the first yoke, wherein the first leg fastening member and the second leg fastening member are separable. It is a stack core having a first yoke fastening member.
  • the present invention can realize a transformer and an iron core that facilitate the work of inserting iron.
  • FIG. 2 is a diagram illustrating components of a single-phase stacked iron core according to the first embodiment.
  • FIG. 4 is a diagram illustrating a procedure for assembling the stack core according to the first embodiment.
  • FIG. 10 is a diagram illustrating components of a three-phase stacked iron core according to the second embodiment. The figure explaining the procedure of assembling the core in Example 2.
  • FIG. 10 is a projection view of a stack core in the second embodiment.
  • FIG. 7 is a diagram illustrating a third embodiment.
  • FIG. 9 is a diagram illustrating a fourth embodiment.
  • FIG. 1 is a view showing each part of a single-phase stacked core for a stationary induction device in the first embodiment.
  • the fasteners (1a to 1d) according to the first embodiment are wider than the width of the magnetic ribbons (2a to 2d) that are members of the core.
  • the core laminated with 2a is a first leg
  • the core laminated with 2c is a second leg
  • the core laminated with 2d is a first yoke
  • the core laminated with 2b is a second core. Let's call it yoke.
  • the magnetic ribbon is an amorphous ribbon, and a magnetic ribbon having a thickness of 10 ⁇ m or more and less than 50 ⁇ m is used.
  • the fasteners (1a, 1b) in contact with one surface of the iron core have an open end at the center so that they can be inserted, so that they can be divided. Further, the fasteners (1c, 1d) in contact with the other surface can be divided at a position different from one of the fasteners (1a, 1b) in order to maintain the rigidity of the core.
  • the fastener (1c) and the fastener (1d) are connected to each other.
  • the fastener (1a) functions as a fastening member for fastening the first leg, the second leg, and each of the first yoke and the second yoke.
  • the fasteners (1a to 1d) are provided with a hole for a guide pin indicating the position of the magnetic ribbon and a screw hole (3) during work of the laminated core.
  • the guide pins can be inserted into holes for the guide pins.
  • Fastening members such as screws and bolts can be inserted into the screw holes (3).
  • FIG. 2 is a diagram showing a procedure for assembling the core using the fasteners (1a to 1d) shown in FIG. First, the fastener (1a) is arranged horizontally with the ground, and the magnetic ribbons (2a to 2c) are arranged thereon according to the guide pins (4).
  • the magnetic thin ribbons other than the upper yoke portion are stacked until a predetermined core thickness is obtained.
  • the positioning of the magnetic ribbon can be performed by the guide pins.
  • the other fastener (1c) is overlaid on the magnetic ribbon, and the fasteners such as the fastener (1c) and the fastener (1a) are connected to each other by a screw (6) as a fastening member and fixed. I do. Thereafter, the above-described core is set up perpendicular to the ground, and the winding (5) is inserted from the open end side above the fastener 1a.
  • a magnetic ribbon having a thickness of 10 ⁇ m or more and less than 50 ⁇ m is easily bent like paper, the work of inserting iron into the upper yoke portion is performed using this characteristic.
  • the magnetic ribbons are piled up while being turned, and laminated until a predetermined thickness is obtained.
  • arranging the guide pins at three points can prevent the magnetic ribbon from falling.
  • the shape of the guide pin may be a round shape such as a columnar shape, and the shape portion may be brought into contact with the iron core to prevent the core from shifting.
  • the screws (6) and bolts which are fastening members, are arranged outside the magnetic ribbon sandwiched by the fasteners (1a to 1d) without penetrating the magnetic ribbon, and the fasteners are fastened to each other. In addition, it is possible to prevent the iron loss from deteriorating.
  • the fastener is desirably a non-magnetic material such as SUS, aluminum, or an insulating material. This makes it possible to suppress the occurrence of stray loss. Further, it is desirable that the guide pin and the connection screw are formed of an insulating material, or that the nut is an insulating member, thereby suppressing a circulating current from flowing through the fastener.
  • FIG. 3 is a view showing each part of a three-phase core for a stationary induction device according to the second embodiment.
  • the fasteners (1e to 1i) of the second embodiment are wider than the width of the magnetic ribbon (2e to 2k) which is a member of the core.
  • the fasteners (1e, 1f, 1g) in contact with one surface of the iron core are divided to insert a winding, and the fasteners (1h, 1i) in contact with the other surface reduce the rigidity of the laminated core.
  • it is structured to be divided and connected at a different place from one of the fasteners (1e, 1f, 1g).
  • the fasteners (1e to 1i) are provided with holes for guide pins and screw holes (3) for indicating the arrangement position of the magnetic ribbon at the time of work on the core.
  • a core work is performed with the guide pin (4) fixed in the hole of the guide pin, and when connecting with the screw (6), a screw is inserted into the screw hole. Fix it.
  • FIG. 4 is a diagram showing a procedure for assembling the core using the fasteners (1e to 1i) shown in FIG. First, the fastener (1e) is arranged horizontally with the ground, and the magnetic ribbons (2e, 2f, 2g, 2h, 2i) are arranged thereon according to the guide pins (4).
  • the magnetic ribbons other than the upper yoke portion are superimposed until a predetermined core thickness is obtained.
  • FIG. 5 is a projection view of the completed core in the second embodiment.
  • the work of stacking the core 2 can be facilitated and the shape can be maintained without deteriorating iron loss, even with a thin magnetic ribbon having low rigidity.
  • the magnetic ribbon 2e as the first leg, the magnetic ribbon 2f as the second leg, the magnetic ribbon 2g as the third leg, and the corresponding fasteners (1h, The core wound with windings around 1e) can be applied to a transformer which is an example of a stationary induction device.
  • the fastener be a non-magnetic material such as SUS, aluminum, or an insulating material. This makes it possible to suppress the occurrence of stray loss.
  • the guide pin and the screw (6) are formed of an insulating material, or have a nut as an insulating member, so that the guide pin and the screw (6) have an electrically insulating function and suppress the flow of a circulating current through the fastener. It is desirable to do.
  • FIG. 6 is a diagram for explaining the third embodiment.
  • the third embodiment has a configuration in which the shape of the guide pin (4) is modified from the configurations of the first and second embodiments described with reference to FIGS. 6 is an enlarged view of the left part, and shows a part of the guide pin excluding the iron core in order to make the shape of the guide pin easier to see.
  • the guide pins are triangular along the shape of the iron core.
  • a guide pin having a polygonal shape rather than a round guide pin such as a cylindrical shape, the contact area with the iron core is increased, so that it is possible to more firmly prevent the shift of the iron core.
  • a screw hole (3) for fixing the fasteners is provided outside the guide pin by passing a screw or bolt.
  • FIG. 7 is a diagram illustrating the fourth embodiment.
  • the fourth embodiment is different from the first and second embodiments described with reference to FIGS. 1 and 3 in the first and second embodiments in that an elastic body is provided between the fasteners (1h, 1i) and the core. Shows the case where the rubber sheet (7) is inserted.
  • the rubber sheet (7) is made of a rubber having a low elastic modulus, it is more advantageous for lowering noise, and if a rubber having a high elastic modulus is used, it is advantageous for aging and strengthening. It is desirable to use those having different elastic moduli.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

La présente invention concerne un transformateur qui comprend : un noyau de fer comportant une première culasse, une première jambe et une seconde jambe reliées à la première culasse, et une seconde culasse reliée à la première jambe et à la seconde jambe ; et des ferrures de fixation qui soutiennent le noyau de fer. Les ferrures de fixation sont soutenues par un organe de fixation de façon à prendre en sandwich le noyau de fer dans la direction de feuilletage, et un organe de fixation de première jambe correspondant à la première jambe, un organe de fixation de seconde jambe correspondant à la seconde jambe, et un organe de fixation de seconde culasse correspondant à la seconde culasse sont reliés aux ferrures de fixation. La largeur de l'organe de fixation de première jambe est supérieure à la largeur de noyau de fer de la première jambe. La largeur de l'organe de fixation de seconde jambe est supérieure à la largeur de noyau de fer de la seconde jambe. La largeur de l'organe de fixation de seconde culasse est supérieure à la largeur de noyau de fer de la seconde culasse. L'une des ferrures de fixation comporte un organe de fixation de première culasse qui correspond à la première culasse et qui a une largeur supérieure à la largeur de noyau de fer de la première culasse et est relié à l'organe de fixation de première jambe et à l'organe de fixation de seconde jambe. L'organe de fixation de première culasse est configuré de façon à pouvoir avoir une extrémité d'ouverture en son centre. L'autre ferrure de fixation comprend un autre organe de fixation de première culasse qui correspond à la première culasse et qui a une largeur supérieure à la largeur de noyau de fer de la première culasse et peut être séparé de l'organe de fixation de première jambe et de l'organe de fixation de seconde jambe.
PCT/JP2019/025148 2018-07-17 2019-06-25 Transformateur et noyau de fer feuilleté WO2020017257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-133801 2018-07-17
JP2018133801A JP7032257B2 (ja) 2018-07-17 2018-07-17 変圧器および積鉄心

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WO2020017257A1 true WO2020017257A1 (fr) 2020-01-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196234A (ja) * 2000-01-14 2001-07-19 Hitachi Ltd アモルファス鉄心モ−ルド変圧器及びその製造方法
JP2001244121A (ja) * 2000-03-01 2001-09-07 Hitachi Ltd アモルファス鉄心変圧器
JP2004103633A (ja) * 2002-09-05 2004-04-02 Hitachi Industrial Equipment Systems Co Ltd アモルファス鉄心モールド変圧器
JP2013118254A (ja) * 2011-12-02 2013-06-13 Hitachi Ltd 変圧器用積鉄心
JP2014192293A (ja) * 2013-03-27 2014-10-06 Daihen Corp アモルファス巻鉄心変圧器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196234A (ja) * 2000-01-14 2001-07-19 Hitachi Ltd アモルファス鉄心モ−ルド変圧器及びその製造方法
JP2001244121A (ja) * 2000-03-01 2001-09-07 Hitachi Ltd アモルファス鉄心変圧器
JP2004103633A (ja) * 2002-09-05 2004-04-02 Hitachi Industrial Equipment Systems Co Ltd アモルファス鉄心モールド変圧器
JP2013118254A (ja) * 2011-12-02 2013-06-13 Hitachi Ltd 変圧器用積鉄心
JP2014192293A (ja) * 2013-03-27 2014-10-06 Daihen Corp アモルファス巻鉄心変圧器

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JP7032257B2 (ja) 2022-03-08
JP2020013839A (ja) 2020-01-23

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