WO2020017257A1 - Transformer and stacked iron core - Google Patents

Transformer and stacked iron core Download PDF

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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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Prior art keywords
leg
yoke
iron core
width
transformer
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PCT/JP2019/025148
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French (fr)
Japanese (ja)
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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
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株式会社日立産機システム
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Publication of WO2020017257A1 publication Critical patent/WO2020017257A1/en

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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

This transformer comprises: an iron core including a first yoke, a first leg and a second leg connected to the first yoke, and a second yoke connected to the first leg and the second leg; and fastening fittings that support the iron core. The fastening fittings are supported by a fastening member so as to sandwich the iron core in the layering direction, and a first leg fastening member corresponding to the first leg, a second leg fastening member corresponding to the second leg, and a second yoke fastening member corresponding to the second yoke are connected to the fastening fittings. The width of the first leg fastening member is greater than the iron core width of the first leg. The width of the second leg fastening member is greater than the iron core width of the second leg. The width of the second yoke fastening member is greater than the iron core width of the second yoke. One of the fastening fittings has a first yoke fastening member that corresponds to the first yoke and that has a width greater than the iron core width of the first yoke and is connected to the first leg fastening member and the second leg fastening member. The first yoke fastening member is configured so as to be able to have an opening end in the center thereof. The other fastening fitting has another first yoke fastening member that corresponds to the first yoke and that has a width greater than the iron core width of the first yoke and is separable from the first leg fastening member and the second leg fastening member.

Description

変圧器および積鉄心Transformers and cores
　本発明は、変圧器および積鉄心に係り、特に、変圧器或いはリアクトル等の静止誘導電器に好適な積鉄心、および変圧器に関する。 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.
　変圧器の鉄心材料には、損失が少なく透磁率の大きいケイ素鋼板が用いられてきたが、近年、エネルギー消費量の増加に伴う省エネニーズの高まりにより、変圧器の鉄心材料に、ケイ素鋼板に替わる鉄基アモルファス合金を用いた高効率な変圧器（以下、アモルファス変圧器という）の需要が高まっている。 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.
　ところで、アモルファス変圧器の鉄心に用いられているアモルファス磁性薄帯は、磁性合金の溶融体を超急冷して製造される。一般的に、アモルファス磁性薄帯を用いて変圧器鉄心を製造する場合、切断したアモルファス磁性薄帯を積層面がコの字をなすように積層し、巻線を挿入した後、バットジョイントやラップジョイントと呼ばれる方法で、左右のアモルファス磁性薄帯を交互に重ね合わせることにより、閉磁路を形成する巻鉄心が作製される。 By the way, the amorphous magnetic ribbon used for the iron core of the amorphous transformer is manufactured by rapidly quenching a melt of a magnetic alloy. Generally, when a transformer core is manufactured using an amorphous magnetic ribbon, 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.
　また、巻線を鉄心に挿入する作業前には、アモルファス磁性薄帯の積層作業に起因する応力の影響を除去するため、鉄心を成形した状態で磁場中焼鈍を行う工程が入る。焼鈍後、アモルファス巻鉄心を絶縁紙で覆う、もしくは鉄心の積層面を樹脂で塗布する工程が入り、巻線に挿入され、変圧器として形成されていく。 Before inserting the winding into the iron core, 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. After annealing, 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.
　しかし、生産効率の観点から巻鉄心の大形化には限界がある。さらに、鉄心厚さが増していくにつれ、焼鈍時間の調整が難しくなり、焼鈍ムラも大きくなるため、鉄損も大きく増加する可能性がある。 However, there is a limit to the size of the wound iron core from the viewpoint of production efficiency. Further, as the thickness of the iron core increases, it becomes difficult to adjust the annealing time and the unevenness of the annealing increases, so that the iron loss may increase significantly.
　そこで、巻鉄心ではなく積鉄心とすることで、大形鉄心を反転することなく変圧器を組み立てることが可能となる。さらに、鉄心を分割して焼鈍することが可能となるため、焼鈍ムラによる鉄損増加も抑制できる。 Therefore, it is possible to assemble a transformer without reversing a large core by using a stacked core instead of a wound core. Further, since the core can be divided and annealed, it is possible to suppress an increase in iron loss due to unevenness of the annealing.
　特許文献１は、アモルファス磁性薄帯を積層した積鉄心に関して、締金具を保持部材とし、磁性薄帯に貫通孔を設けて連結することで鉄心形状を保持した構造を提案している。 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.
特開２０１３－１１８２５４号公報JP 2013-118254 A
　特許文献１に開示された技術では、巻線を挿入した後に、一方のヨーク部の鉄心を組む、挿し鉄作業を考慮しておらず、巻線を鉄心に巻回する手法をとらなければならないため、作業工数が増加してしまう可能性がある。 In the technique disclosed in 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.
　本発明の目的は、挿し鉄作業が容易な変圧器および積鉄心を提供することにある。 目的 It is an object of the present invention to provide a transformer and an iron core that can be easily inserted.
　本発明の好ましい一例は、第一のヨークと、前記第一のヨークに接続される第一の脚部と第二の脚部と、前記第一の脚部と前記第二の脚部に接続される第二のヨークとを有する鉄心と、前記鉄心を支持する締金具と、を有する変圧器であって、
前記締金具は、
前記鉄心の積層方向を挟み込むように締め付け部材によって支持されており、前記第一の脚部に対応する第一の脚部締部材と、前記第二の脚部に対応する第二の脚部締部材と、前記第二のヨークに対応する第二のヨーク締部材が接続され、前記第一の脚部締部材の幅は、前記第一の脚部の鉄心幅よりも大きく、前記第二の脚部締部材の幅は、前記第二の脚部の鉄心幅よりも大きく、前記第二のヨーク締部材の幅は、前記第二のヨークの鉄心幅よりも大きく、
前記締金具のうち一方の前記締金具は、
前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材に接続される前記第一のヨークに対応する第一のヨーク締部材を有し、前記第一のヨーク締部材は、中央部に開放端を有することができる構成になっており、
前記締金具のうち他方の前記締金具は、
前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材とは分離可能な、前記第一のヨークに対応する、他の第一のヨーク締部材を有する変圧器である。 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.
One of the fasteners,
A first yoke tightener having a width larger than an iron core width of the first yoke and corresponding to the first yoke connected to the first leg tightening member and the second leg tightening member. Having a member, 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.
　本発明の好ましい他の例は、第一のヨークと、前記第一のヨークに接続される第一の脚部と第二の脚部と、前記第一の脚部と前記第二の脚部に接続される第二のヨークとを有する鉄心と、前記鉄心を支持する締金具と、を有する積鉄心であって、
前記締金具は、
前記鉄心の積層方向を挟み込むように締め付け部材によって支持されており、前記第一の脚部に対応する第一の脚部締部材と、前記第二の脚部に対応する第二の脚部締部材と、前記第二のヨークに対応する第二のヨーク締部材が接続され、前記第一の脚部締部材の幅は、前記第一の脚部の鉄心幅よりも大きく、前記第二の脚部締部材の幅は、前記第二の脚部の鉄心幅よりも大きく、前記第二のヨーク締部材の幅は、前記第二のヨークの鉄心幅よりも大きく、
前記締金具のうち一方の前記締金具は、
前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材に接続される前記第一のヨークに対応する第一のヨーク締部材を有し、前記第一のヨーク締部材は、中央部に開放端を有することができる構成になっており、
前記締金具のうち他方の前記締金具は、
前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材とは分離可能な、前記第一のヨークに対応する、他の第一のヨーク締部材を有する積鉄心である。 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,
One of the fasteners,
A first yoke tightener having a width larger than the iron core width of the first yoke and corresponding to the first yoke connected to the first leg tightening member and the second leg tightening member. Having a member, 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.
　本発明は、挿し鉄作業を容易にした変圧器および積鉄心を実現できる。 The present invention can realize a transformer and an iron core that facilitate the work of inserting iron.
実施例１における単相の積鉄心の部品を示す図。FIG. 2 is a diagram illustrating components of a single-phase stacked iron core according to the first embodiment. 実施例１における積鉄心を組み立てる手順を説明する図。FIG. 4 is a diagram illustrating a procedure for assembling the stack core according to the first embodiment. 実施例２における三相の積鉄心の部品を示す図。FIG. 10 is a diagram illustrating components of a three-phase stacked iron core according to the second embodiment. 実施例２における積鉄心を組み立てる手順を説明する図。The figure explaining the procedure of assembling the core in Example 2. 実施例２における積鉄心の投影図。FIG. 10 is a projection view of a stack core in the second embodiment. 実施例３を説明する図。FIG. 7 is a diagram illustrating a third embodiment. 実施例４を説明する図。FIG. 9 is a diagram illustrating a fourth embodiment.
　以下、本発明にかかる変圧器鉄心の実施の形態について図面を用いて説明する。 Hereinafter, embodiments of a transformer core according to the present invention will be described with reference to the drawings.
　図１は、実施例１における静止誘導電器用の単相の積鉄心の各部品図を示す。実施例１の締金具（１ａ～１ｄ）は、図１に示すように、積鉄心の部材である磁性薄帯（２ａ～２ｄ）の幅よりも広い幅の金具である。ここで、2aを積層した鉄心は、第一の脚部、2cを積層した鉄心は、第二の脚部、2dを積層した鉄心は、第一のヨーク、2bを積層した鉄心は、第二のヨークと呼ぶことにする。磁性薄帯は、アモルファス（非晶質）薄帯であり、１０μｍ以上５０μｍ未満の厚さの磁性薄帯を用いる。 FIG. 1 is a view showing each part of a single-phase stacked core for a stationary induction device in the first embodiment. As shown in FIG. 1, 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. Here, 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, and 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 μm or more and less than 50 μm is used.
　また、鉄心の片方の面に接する締金具（１ａ、１ｂ）は巻線を挿入するため、挿入できるように中央部に開放端を有して分割できるようにしている。また、もう片方の面に接する締金具（１ｃ、１ｄ）は、積鉄心の剛性を保持するため、一方の締金具（１a、１ｂ）とは別の箇所で分割できるようになっている。そして、締金具（１ｃ）と締金具（１ｄ）とは、連結される構造となっている。 締 Also, 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.
　また、締金具（１a）は、第一の脚部、第二の脚部、および第一のヨークと第二のヨークのそれぞれを締め付ける締め部材として機能する。 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.
　さらに、締金具（１ａ～１ｄ）には積鉄心作業時に、磁性薄帯の配置位置を示すガイドピン用の穴と、ネジ穴（３）を設けている。ガイドピンは、ガイドピン用の穴に差し込み可能となっている。ネジ穴（３）には、ネジやボルトなどの締め付け部材を差し込むことが出来る。 Furthermore, 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).
　図２は、図１で示した締金具（１ａ～１ｄ）を用いて積鉄心を組み立てる手順を示した図である。まず、締金具（１ａ）を地面と水平に配置し、その上にガイドピン（４）に従って、磁性薄帯（２ａ～２ｃ）を配置する。 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).
　一般的に、積鉄心は、磁性薄帯を交互にずらして積層方向に重ねていくため、所定の鉄心厚さになるまで、上部ヨーク部以外の磁性薄帯を重ねていく。ガイドピンにより、磁性薄帯の位置合わせが出来る。 積 Generally, since the magnetic cores are alternately shifted in the stacking direction and stacked in the stacking direction, 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.
　次に、もう一方の締金具（１ｃ）を磁性薄帯の上に重ね、締金具（１ｃ）と締金具（１ａ）といった締金具同士を、締め付け部材であるネジ（６）で連結し、固定する。その後、上記積鉄心を地面と垂直にたて、締金具１ａの上方の開放端側から、巻線（５）を挿入する。 Next, 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.
　厚みが、１０μｍ以上５０μｍ未満の磁性薄帯は紙のように曲がりやすいため、この特性を利用し、上部ヨーク部の挿し鉄作業を実施する。磁性薄帯をめくりながら重ねていき、所定の厚さになるまで積層させる。例えば、ガイドピンを３点に配置して、磁性薄帯の落下を防止できる。ガイドピンの形状は、円柱形などの丸い形状とし、その形状の部分と鉄心とを接触させるようにして、鉄心のずれを防止するようにしてもよい。 磁性 Since a magnetic ribbon having a thickness of 10 μm or more and less than 50 μm 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. For example, 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.
　最後に、上部ヨーク部の締金具（１ｂ）と反対側の締金具（１ｃ）を取り付け、締め付け部材であるボルトで連結、固定する。以上のような方法で組み立てることで、剛性の低い薄い磁性薄帯であっても、鉄損を悪化させることなく、積鉄心の挿し鉄作業などの積作業を容易にし、形状を保持することが可能となる。 (4) Finally, the fastener (1c) on the opposite side to the fastener (1b) in the upper yoke portion is attached, and connected and fixed with a bolt as a fastening member. By assembling in the manner described above, even for a thin magnetic ribbon having low rigidity, it is possible to easily perform a stacking operation such as an insertion iron work of a core and maintain a shape without deteriorating iron loss. It becomes possible.
　ここで、締め付け部材であるネジ（６）やボルトは、磁性薄帯を貫通することなく、締金具（１ａ～１ｄ）で挟まれた磁性薄帯の外側に配置され、締金具同士を締め付けるので、鉄損を悪化することを防ぐことができる。 Here, 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.
　また、例えば、締金具は、SUSやアルミや絶縁材のような非磁性材料であることが望ましい。これにより、漂遊損の発生を抑制することが可能となる。
さらに、ガイドピンおよび連結ネジは絶縁材で形成するか、もしくは、ナットを絶縁部材にすることで、締金具を介して循環電流が流れるのを抑制することが望ましい。 Also, for example, 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.
　図３は、実施例２における静止誘導電器用の三相の積鉄心の各部品図を示す。
  実施例２の締金具（１e～１i）は図３に示すように、積鉄心の部材である磁性薄帯（２e～２ｋ）の幅よりも広い幅の金具である。また、鉄心の片方の面に接する締金具（１e、１f、１g）は巻線を挿入するため分割しており、もう片方の面に接する締金具（１ｈ、１i）は、積鉄心の剛性を保持するため、一方の締金具（１e、１f、1g）とは別の箇所で分割され連結される構造となっている。 FIG. 3 is a view showing each part of a three-phase core for a stationary induction device according to the second embodiment.
As shown in FIG. 3, 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. In addition, 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. In order to hold it, it is structured to be divided and connected at a different place from one of the fasteners (1e, 1f, 1g).
　さらに、締金具（１e～１i）には積鉄心作業時に、磁性薄帯の配置位置を示すガイドピン用の穴とネジ穴（３）を設けている。また、図３に示したように、ガイドピンの穴にはガイドピン（４）を固定した状態で積鉄心作業を実施し、ネジ（６）で連結する際に、ネジ穴にネジを入れて固定する。 Furthermore, 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. In addition, as shown in FIG. 3, 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.
　図４は、図３で示した締金具（１e～１i）を用いて、積鉄心を組み立てる手順を示した図である。まず、締金具（１e）を地面と水平に配置し、その上にガイドピン（４）に従って、磁性薄帯（２e、２f、２ｇ、２ｈ、２i）を配置する。 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).
　一般的に、積鉄心は磁性薄帯を交互にずらして積層方向に重ねていくため、所定の鉄心厚さになるまで、上部ヨーク部以外の磁性薄帯を重ねていく。 Generally, since the magnetic cores are stacked alternately in the laminating direction by alternately shifting the magnetic ribbons, the magnetic ribbons other than the upper yoke portion are superimposed until a predetermined core thickness is obtained.
　次に、もう一方の締金具（１h）を磁性薄帯の上に重ね、締金具同士をネジで連結し、固定する。その後、積鉄心を地面と垂直にたて、巻線（５）を挿入する。 (4) Next, the other fastener (1h) is placed on the magnetic ribbon, and the fasteners are connected to each other with screws and fixed. Thereafter, the stacked core is set perpendicular to the ground, and the winding (5) is inserted.
　厚み数十μｍの磁性薄帯は紙のように曲がりやすいため、この特性を利用し、上部ヨーク部の挿し鉄作業を実施する。磁性薄帯をめくりながら重ねていき、所定の厚さになるまで積層させる。最後に、上部ヨーク部の締金具（１ｆ、１ｇ）と反対側の締金具（１i）を取り付け、ボルトで連結して、締金具（１ｆ、１ｇ）と締金具（１i）とを固定する。 磁性 Since a magnetic ribbon with a thickness of several tens of μm is easy to bend like paper, take advantage of this characteristic to insert iron into the upper yoke. The magnetic ribbons are piled up while being turned, and laminated until a predetermined thickness is obtained. Finally, the fastener (1i) on the opposite side to the fastener (1f, 1g) on the upper yoke portion is attached and connected with a bolt to fix the fastener (1f, 1g) and the fastener (1i).
　図５は、完成した実施例２における積鉄心の投影図を示す。以上のような方法で組み立てることで、剛性の低い薄い磁性薄帯であっても、鉄損を悪化させることなく、積鉄心２の積作業を容易にし、形状を保持することが可能となる。図４における、第一の脚部としての磁性薄帯2e、第二の脚部としての磁性薄帯2f、第三の脚部としての磁性薄帯2gと、それらに対応した締金具（１ｈ、1e）の周囲に巻線を巻いた積鉄心は、静止誘導電器の一例である変圧器に適用することができる。 FIG. 5 is a projection view of the completed core in the second embodiment. By assembling in the manner described above, 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. In FIG. 4, 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.
　また、実施例１と同様に、例えば、締金具はSUSやアルミや絶縁材のような非磁性材料であることが望ましい。これにより、漂遊損の発生を抑制することが可能となる。 Also, as in the first embodiment, for example, it is desirable that 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.
　さらに、ガイドピンおよびネジ（６）は、絶縁材で形成するか、もしくは、ナットを絶縁部材にすることで、電気的に絶縁機能を有し、締金具を介して循環電流が流れるのを抑制することが望ましい。 Furthermore, 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.
　図６は、実施例３を説明する図である。実施例３は、図１、図３で説明した、実施例１および実施例２の構成に対して、ガイドピン（４）の形状を変形した構成となっている。図６における左側の部分を拡大した、右側に示した部分図には、ガイドピンの形状を、みやすくするため、鉄心を除いた図を示している。 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.
　図６では、鉄心の形状に沿ってガイドピンを三角形としている。円柱形などの丸いガイドピンよりも、多角形の形状のガイドピンにすることで、鉄心との接触面積が増加するため、より強固に鉄心のずれを防止することが可能となる。なお、ガイドピンの外側に、ネジやボルトを貫通させて、締金具同士を固定するネジ穴（３）を配置している。 In FIG. 6, the guide pins are triangular along the shape of the iron core. By using 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. Note that a screw hole (3) for fixing the fasteners is provided outside the guide pin by passing a screw or bolt.
　図７は、実施例４を説明する図である。
  実施例４は、実施例１および２の図１、図３で説明した、実施例１および実施例２の構成に対して、締金具（１h、１i）と積鉄心との間に、弾性体であるゴムシート（７）を挿入した場合を示している。 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.
　ゴムシート（７）を挿入することで、接合部で特に増加しやすい振動を抑制できるとともに、締金具に発生する漂遊損を低減することが可能となる。 By inserting the rubber sheet (7), it is possible to suppress the vibration that is particularly likely to increase at the joint portion, and it is possible to reduce the stray loss generated in the fastener.
　尚、ゴムシート（７）は、弾性率の低いゴムを用いれば、より低騒音化に有利となり、弾性率の高いゴムを用いれば経年劣化や高強度化に有利となるため、使用目的に合わせて、弾性率の異なるものを使用するのが望ましい。 If 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.
１a～１i…締金具、２a～２ｋ…磁性薄帯、４…ガイドピン、５…巻線、６…ネジ、７…ゴムシート 1a to 1i: Clamp, 2a to 2k: Magnetic ribbon, 4: Guide pin, 5: Winding, 6: Screw, 7: Rubber sheet

Claims (15)

  1. 第一のヨークと、前記第一のヨークに接続される第一の脚部と第二の脚部と、前記第一の脚部と前記第二の脚部に接続される第二のヨークとを有する鉄心と、
    前記鉄心を支持する締金具と、を有する変圧器であって、
    前記締金具は、
    前記鉄心の積層方向を挟み込むように締め付け部材によって支持されており、前記第一の脚部に対応する第一の脚部締部材と、前記第二の脚部に対応する第二の脚部締部材と、前記第二のヨークに対応する第二のヨーク締部材が接続され、前記第一の脚部締部材の幅は、前記第一の脚部の鉄心幅よりも大きく、前記第二の脚部締部材の幅は、前記第二の脚部の鉄心幅よりも大きく、前記第二のヨーク締部材の幅は、前記第二のヨークの鉄心幅よりも大きく、
    前記締金具のうち一方の前記締金具は、
    前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材に接続される前記第一のヨークに対応する第一のヨーク締部材を有し、前記第一のヨーク締部材は、中央部に開放端を有することができる構成になっており、
    前記締金具のうち他方の前記締金具は、
    前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材とは分離可能な、前記第一のヨークに対応する、他の第一のヨーク締部材を有することを特徴とする変圧器。     A first yoke, a first leg and a second leg connected to the first yoke, and a second yoke connected to the first leg and the second leg. An iron core having
    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.
    One of the fasteners,
    A first yoke tightener having a width larger than an iron core width of the first yoke and corresponding to the first yoke connected to the first leg tightening member and the second leg tightening member. Having a member, 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. A transformer having a first yoke fastening member.
  2. 請求項１に記載の変圧器において、
    前記一方の前記締金具は、分離可能であり、
    前記他方の前記締金具の分離可能な位置とは、異なった位置で、分離可能であることを特徴とする変圧器。     The transformer according to claim 1,
    The one of the fasteners is separable,
    A transformer which is separable at a position different from a separable position of the other fastener.
  3. 請求項１に記載の変圧器において、
    前記締金具に、ネジ穴及びガイドピンを設けたことを特徴とする変圧器。     The transformer according to claim 1,
    A transformer, wherein the fastener includes a screw hole and a guide pin.
  4. 請求項１に記載の変圧器において、
    前記鉄心の部材である磁性薄帯は、１０μｍ以上５０μｍ未満の厚さであることを特徴とする変圧器。     The transformer according to claim 1,
    The magnetic ribbon as the member of the iron core has a thickness of 10 μm or more and less than 50 μm.
  5. 請求項１に記載の変圧器において、
    締め付け部材は、電気的に絶縁機能を有することを特徴とする変圧器。     The transformer according to claim 1,
    A transformer, wherein the fastening member has an electrically insulating function.
  6. 請求項３に記載の変圧器において、
    前記ガイドピンは、電気的に絶縁機能を有することを特徴とする変圧器。     The transformer according to claim 3,
    The said guide pin has an electrically insulating function, The transformer characterized by the above-mentioned.
  7. 請求項１に記載の変圧器において、
    前記締金具の材質は、非磁性材料であることを特徴とする変圧器。     The transformer according to claim 1,
    The material of the said fastener is a non-magnetic material, The transformer characterized by the above-mentioned.
  8. 請求項３に記載の変圧器において、
    前記ガイドピンの形状は、円柱もしくは多角柱であり、前記ガイドピンは前記鉄心に接することを特徴とする変圧器。     The transformer according to claim 3,
    The shape of the said guide pin is a cylinder or a polygonal pillar, The said guide pin contacts the said iron core, The transformer characterized by the above-mentioned.
  9. 請求項１に記載の変圧器において、
    前記締金具と、前記鉄心との間に、弾性体を配置したことを特徴とする変圧器。     The transformer according to claim 1,
    A transformer, wherein an elastic body is arranged between the clamp and the iron core.
  10. 請求項１に記載の変圧器において、
    前記締め付け部材は、前記鉄心の外側に配置したことを特徴とする変圧器。     The transformer according to claim 1,
    The said fastening member was arrange | positioned outside the said iron core, The transformer characterized by the above-mentioned.
  11. 請求項１に記載の変圧器において、
    前記第一の脚部と前記第二の脚部には、巻線を巻いた構成を有することを特徴とする変圧器。     The transformer according to claim 1,
    A transformer, wherein the first leg and the second leg have windings wound thereon.
  12. 第一のヨークと、前記第一のヨークに接続される第一の脚部と第二の脚部と、前記第一の脚部と前記第二の脚部に接続される第二のヨークとを有する鉄心と、
    前記鉄心を支持する締金具と、を有する積鉄心であって、
    前記締金具は、
    前記鉄心の積層方向を挟み込むように締め付け部材によって支持されており、前記第一の脚部に対応する第一の脚部締部材と、前記第二の脚部に対応する第二の脚部締部材と、前記第二のヨークに対応する第二のヨーク締部材が接続され、前記第一の脚部締部材の幅は、前記第一の脚部の鉄心幅よりも大きく、前記第二の脚部締部材の幅は、前記第二の脚部の鉄心幅よりも大きく、前記第二のヨーク締部材の幅は、前記第二のヨークの鉄心幅よりも大きく、
    前記締金具のうち一方の前記締金具は、
    前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材に接続される前記第一のヨークに対応する第一のヨーク締部材を有し、前記第一のヨーク締部材は、中央部に開放端を有することができる構成になっており、
    前記締金具のうち他方の前記締金具は、
    前記第一のヨークの鉄心幅よりも大きい幅であって、前記第一の脚部締部材と前記第二の脚部締部材とは分離可能な、前記第一のヨークに対応する、他の第一のヨーク締部材を有することを特徴とする積鉄心。     A first yoke, a first leg and a second leg connected to the first yoke, and a second yoke connected to the first leg and the second leg. An iron core having
    And a fastener for supporting the iron core; and
    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.
    One of the fasteners,
    A first yoke tightener having a width larger than an iron core width of the first yoke and corresponding to the first yoke connected to the first leg tightening member and the second leg tightening member. Having a member, 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. A laminated iron core having a first yoke fastening member.
  13. 請求項１２に記載の積鉄心において、
    前記一方の前記締金具は、分離可能であり、
    前記他方の前記締金具の分離可能な位置とは、異なった位置で、分離可能であることを特徴とする積鉄心。     The stacked iron core according to claim 12,
    The one of the fasteners is separable,
    A stack iron core, which is separable at a position different from a separable position of the other one of the fasteners.
  14. 請求項１２に記載の積鉄心において、
    前記締金具に、ネジ穴及びガイドピンを設けたことを特徴とする積鉄心。     The stacked iron core according to claim 12,
    A stacked iron core, wherein a screw hole and a guide pin are provided in the fastener.
  15. 請求項１２に記載の積鉄心において、
    前記鉄心の部材である磁性薄帯は、１０μｍ以上５０μｍ未満の厚さであることを特徴とする積鉄心。     The stacked iron core according to claim 12,
    The magnetic core, which is a member of the iron core, has a thickness of 10 μm or more and less than 50 μm.
PCT/JP2019/025148 2018-07-17 2019-06-25 Transformer and stacked iron core WO2020017257A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196234A (en) * 2000-01-14 2001-07-19 Hitachi Ltd Amorphous iron core molding transformer and manufacturing method therefor
JP2001244121A (en) * 2000-03-01 2001-09-07 Hitachi Ltd Amorphous core transformer
JP2004103633A (en) * 2002-09-05 2004-04-02 Hitachi Industrial Equipment Systems Co Ltd Amorphous core molded transformer
JP2013118254A (en) * 2011-12-02 2013-06-13 Hitachi Ltd Product iron core for transformer
JP2014192293A (en) * 2013-03-27 2014-10-06 Daihen Corp Amorphous wound core transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196234A (en) * 2000-01-14 2001-07-19 Hitachi Ltd Amorphous iron core molding transformer and manufacturing method therefor
JP2001244121A (en) * 2000-03-01 2001-09-07 Hitachi Ltd Amorphous core transformer
JP2004103633A (en) * 2002-09-05 2004-04-02 Hitachi Industrial Equipment Systems Co Ltd Amorphous core molded transformer
JP2013118254A (en) * 2011-12-02 2013-06-13 Hitachi Ltd Product iron core for transformer
JP2014192293A (en) * 2013-03-27 2014-10-06 Daihen Corp Amorphous wound core transformer

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