WO2010143710A1 - Noyau de fer en forme de cadre et son procédé d'assemblage - Google Patents

Noyau de fer en forme de cadre et son procédé d'assemblage Download PDF

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Publication number
WO2010143710A1
WO2010143710A1 PCT/JP2010/059925 JP2010059925W WO2010143710A1 WO 2010143710 A1 WO2010143710 A1 WO 2010143710A1 JP 2010059925 W JP2010059925 W JP 2010059925W WO 2010143710 A1 WO2010143710 A1 WO 2010143710A1
Authority
WO
WIPO (PCT)
Prior art keywords
leg
yoke
iron core
block
frame
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2010/059925
Other languages
English (en)
Japanese (ja)
Inventor
重紀 岡田
孝 長谷川
知司 座馬
重嘉 酒井
伸司 樫村
久 伊藤
信夫 楢原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kandenko Co Ltd
AT Tokyo Corp
Takaoka Chemical Co Ltd
Original Assignee
Kandenko Co Ltd
AT Tokyo Corp
Takaoka Chemical Co Ltd
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 Kandenko Co Ltd, AT Tokyo Corp, Takaoka Chemical Co Ltd filed Critical Kandenko Co Ltd
Publication of WO2010143710A1 publication Critical patent/WO2010143710A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the present invention relates to a frame type iron core and a method for assembling the same.
  • a transformer is configured by attaching a coil constituting a conductive circuit to an iron core constituting a magnetic circuit.
  • the iron core There are various types of structures of the iron core, and one of them is a type called a laminated iron core constructed by appropriately stacking blocks made of band-shaped silicon steel plates. Since the iron core forms a magnetic circuit by appropriately arranging strip-like blocks, a gap is generated at the joint between the ends of adjacent blocks. In such an iron core with a gap, there is a demand for reducing the magnetizing inrush current while reducing the residual magnetic flux, and the invention disclosed in Patent Document 1 has been proposed.
  • Patent Document 1 is configured by appropriately stacking rectangular blocks to form a planar rectangular stacked iron core.
  • Each block has a configuration in which a non-magnetic insulator or metal body is provided on one surface or both surfaces of a rectangular silicon steel plate. And the structure which interposes a nonmagnetic insulator etc. between each layer of the block piled up and down by taking up the block is taken.
  • a frame-shaped iron core is configured by (1) connecting at least both ends of a yoke portion made of a pair of magnetic bodies with legs made of a magnetic material, and The iron part and the leg part are laminated while alternately shifting a plurality of strip-like blocks in the longitudinal direction, and in the frame-shaped iron core whose joint part is inclined, the block for the yoke part and the leg part A nonmagnetic member was arranged in a continuous state at the seam where the blocks were joined.
  • the residual magnetic flux density was reduced by adopting such a configuration.
  • the nonmagnetic member is continuously arranged at the joint part, it is not arranged on the entire surface of the yoke part and the leg part other than the joint part, and the existence ratio of the magnetic substance in the yoke part and the leg part is increased. (The ratio of non-magnetic members present can be reduced), and miniaturization and weight reduction can be achieved.
  • the non-magnetic member can be a sheet member.
  • the material may be a desired resin film, or a sheet member made of insulating paper or other various materials can be used. Specifically, for example, a polymer film, a polymer fiber sheet, a surface coating sheet, a resin-impregnated sheet, insulating paper, a nonwoven fabric, a glass cloth sheet, and the like can be used. In order to bend appropriately, it is desirable to use a resin film having stretchability and strength.
  • the non-magnetic member may be configured by applying a non-magnetic paint. In this way, it is possible to easily dispose the nonmagnetic member even if the joint surface is uneven.
  • the yoke block and / or the leg block may be formed by stacking a plurality of silicon steel plates. If it does in this way, a residual magnetic flux density will decrease, and the extent of the reduction will increase, so that there are many sheets.
  • At least one block among the blocks formed by stacking the plurality of silicon steel plates may be set so that a silicon steel plate located on one or both surfaces is short and does not overlap the seam portion.
  • this short silicon steel plate is a silicon steel plate denoted by reference numeral 22, and is disposed only on one lower surface. This is preferable because the existence ratio of the magnetic body per unit volume (cross-sectional area) in the iron core is further improved.
  • the assembly method of the present invention is configured by connecting at least both ends of a yoke portion made of a pair of magnetic bodies with legs made of a magnetic material, and each of the yoke portion and the legs is made up of a plurality of bands. It is a method of assembling a frame-shaped iron core in which the plate-shaped blocks are stacked while being alternately shifted in the longitudinal direction, and the joint portion thereof is inclined, and the yoke block or the leg block is stacked and stacked. The yoke part or the leg part is formed, and then the nonmagnetic sheet member is disposed opposite to the side surface of the formed yoke part or the leg part, and the leg member is pushed in by pushing the sheet member. The side surface of the block or the block for the yoke portion is inserted into the joint portion on the side surface of the yoke portion or the leg portion.
  • the non-magnetic member is continuously arranged at the joint portion of the joint portion between the yoke portion and the leg portion, it is possible to suppress the decrease in the existence ratio of the magnetic body in the iron core, and to enter the magnetism while reducing the size and weight.
  • the current can be lowered.
  • FIG. It is a top view which shows suitable one Embodiment of this invention.
  • FIG. It is a figure which shows one Embodiment of the assembly method. It is a top view which shows another suitable one Embodiment of this invention. It is a graph which shows an experimental result.
  • FIG. 1 is a plan view showing an embodiment of an iron core according to the present invention
  • FIG. 2 is a cross-sectional view of a joint portion.
  • the iron core 1 according to the present embodiment is formed in a planar rectangular shape by joining both ends of a pair of yoke portions (also referred to as “yoke portions”) 2 arranged at the top and bottom with legs 3. And both the yoke part 2 and the leg part 3 are comprised using a directional silicon steel plate.
  • the joint surface between the yoke portion 2 and the leg portion 3 is inclined by 45 degrees, and the joint surfaces are appropriately overlapped and joined to form a so-called frame-shaped iron core.
  • the joint is inclined at 45 degrees, but the angle can be any angle (acute angle) such as 30 degrees or 60 degrees.
  • the yoke part 2 is configured by laminating a plurality of band-like yoke part blocks 20.
  • the leg portion 3 is configured by laminating a plurality of leg plate blocks 30 in the form of strips.
  • the yoke part block 20 and the leg part block 30 are each configured by stacking a plurality (n) of strip-shaped directional silicon steel plates.
  • Each directional silicon steel plate has an isosceles trapezoidal plane shape in which both ends in the longitudinal direction are inclined 45 degrees in the rolling direction.
  • each yoke part block 20 is shifted by a predetermined distance X alternately in the longitudinal direction when laminating.
  • each yoke part block 20 has its one end alternately protruding sideways by a predetermined distance X.
  • the leg blocks 30 are also stacked while being shifted by a predetermined distance X alternately in the longitudinal direction. At this time, the adjacent yoke block 20 and leg block 30 are reversed in the direction of shifting, and the protruding tip of each block enters the other party's retracted space.
  • a continuous insulating / nonmagnetic sheet member 5 is disposed between the joint portions (joining portions) of the yoke portion 2 and the leg portion 3.
  • This sheet member can be made of a thin resin film or a material that can be easily deformed, such as insulating paper, or the like as appropriate. That is, the sheet member 5 is arranged in a continuous state at the butting portion where the tip side surfaces 20a, 30a of each block 20, 30 face each other and the overlapping portion where the top and bottom surfaces 20b, 30b face each other. Thereby, at least the gap of the film thickness of the sheet member 5 is ensured on the joint surface between the adjacent yoke portion 2 and the leg portion 3. The magnetic flux flowing from the yoke part 2 to the leg part 3 and from the leg part 3 to the yoke part 2 moves through the nonmagnetic sheet member 5.
  • the sheet member 5 is disposed only in the region of the joint portion that overlaps with the predetermined distance X, and in the portion where the yoke portion 2 and the leg portion 3 other than that are not overlapped,
  • the magnetic body which consists of a directional silicon steel plate which respectively consists of the block 20 for yoke parts and the block 30 for legs exists. Therefore, as shown in Patent Document 1, the amount of the magnetic material per unit cross-sectional area in the iron core can be increased as compared with the case where the non-magnetic material is disposed on the entire surface of the block. As a result, the size and weight can be reduced.
  • the yoke part block 20 and the leg part block 30 constitute the yoke part 2 and the leg part 3 by stacking 10 blocks. Therefore, the block at an appropriate position uses a directional silicon plate made of an isosceles trapezoid with a reference length of n-1 sheets, using the lowest directional silicon steel sheet whose length is a predetermined distance X or more.
  • the steel plate 21 and the short directional silicon steel plate 22 are integrated by overlapping one end face.
  • the tip position of the directional silicon steel plate 22 having a short dimension is positioned on the near side by a predetermined distance X from the end portion of the yoke portion block 20. Therefore, when each block 20 and 30 is piled up, the directionality silicon steel plate 22 with the short dimension takes the structure which does not exist in the overlap part in a junction part.
  • the thickness (height) of the joint portion is bulky, and there is a space between the upper and lower blocks in the region other than the joint portion.
  • the short directional silicon steel plate 22 a part of the space can be filled, and the presence (occupation) ratio of the silicon steel plate can be further increased.
  • the same configuration may be adopted for the predetermined leg block 30 on the leg 3 side as well.
  • An iron core having such a configuration can be configured by the following procedure. First, silicon steel plates having a predetermined shape are prepared, and the respective blocks 20 and 30 that are integrated by overlapping n pieces are prepared. Then, for example, the ten yoke portion blocks 20 are stacked while being alternately shifted in the longitudinal direction, and connected and integrated with bolts or the like to form the yoke portion 2 (FIG. 3A).
  • Insulating / non-magnetic sheet member 5 is arranged in the vicinity of both ends (actually, one each) of yoke portion 2 so as to cover (hide) the end face (FIG. 3B).
  • the tip of the leg block 30 that is disposed opposite to the sheet member 5 is inserted into the joint between the yoke blocks 20 (FIG. 3C).
  • the sheet member 5 is appropriately bent according to the end face shape of each of the blocks 20 and 30 and is arranged in a continuous shape between the joint portion (connecting portion) of the yoke portion 2 and the leg portion 3. become.
  • the sheet member 5 is used as a non-magnetic material, the sheet member is arranged in a state where it is suspended in a position covering the end surfaces of the yoke part 2 and the leg part 3, and a predetermined block is pushed in order. Can be assembled.
  • the yoke portion 2 is formed first, and the leg block 30 is appropriately attached thereto.
  • the leg portion 3 may be manufactured first.
  • one of the yoke part 2 and the leg part 3 is not formed first, but the yoke part block 20 and the leg block 30 may be laminated and manufactured as appropriate.
  • the sheet member 5 is used as the nonmagnetic material, but the present invention is not limited to this, and various nonmagnetic materials can be used.
  • it can be realized by applying a non-magnetic paint to the joint.
  • a non-magnetic paint For example, as shown in FIG. 3A, when the yoke portion 2 is formed, a predetermined paint is applied to the tip end surface. Subsequently, an iron core can be manufactured by attaching the leg block 30 as appropriate. Since the coating material only needs to be applied to at least one side of the adjacent blocks to be joined, in the example shown in the figure, it is sufficient to apply the coating only to the leg 2 side.
  • FIG. 4 shows another embodiment.
  • the example applied to the frame type iron core for three phases is shown. That is, since it is for three phases, both ends of the central leg portion 4 are formed in an equilateral triangle shape at right angles, and a V notch 2a is formed at the center of one side of the yoke portion 2 joined thereto. Thereby, the junction part of the center leg part 4 and the yoke part 2 becomes V shape.
  • each block in the conventional frame-shaped iron core, each block often uses one silicon steel plate, but it remains by using n sheets as in this embodiment. It was confirmed that the magnetic flux density decreased and the effect of the decrease was increased as the number of the magnetic fluxes was increased.
  • FIG. 5 is a graph showing experimental results for demonstrating the effects of the present invention.
  • FIG. 5A shows the characteristics of the magnetic flux density with respect to the excitation current by attaching a predetermined coil to a normal frame-shaped iron core (sheet member not inserted) as a comparative example. The number of silicon steel plates per block was N. The ratio of the residual magnetic flux density to the steady magnetic flux density is about 57%.
  • FIG. 5B shows the magnetic flux density-excitation current characteristics of a frame-shaped iron core (sheet member not inserted) in which the number of silicon steel plates per block is increased (3N sheets). As the number of blocks per block is increased, the number of blocks to be stacked is reduced.
  • Each of the frame-shaped iron cores is of the three-phase type shown in FIG.
  • FIG.5 (c) is a frame-shaped iron core of this embodiment, and while using what laminated
  • the magnetic flux density-excitation current characteristics for the arranged ones are shown.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

L'invention porte sur un noyau de fer en forme de cadre comprenant une culasse (2), dont les deux extrémités sont raccordées par une jambe (3). La culasse comprend une paire de corps magnétiques et la jambe comprend un corps magnétique. La culasse et la jambe sont formées chacune par stratification d'une pluralité de blocs en forme de bande (20, 30) décalés de façon alternée dans la direction longitudinale. Leurs zones d'assemblage sont inclinées à un angle de 45°. Un élément en feuille non magnétique (5) est installé relié aux zones de raccordement au niveau desquelles les blocs (20) de la culasse et les blocs (30) de la jambe sont assemblés.
PCT/JP2010/059925 2009-06-12 2010-06-11 Noyau de fer en forme de cadre et son procédé d'assemblage Ceased WO2010143710A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-140829 2009-06-12
JP2009140829A JP5604059B2 (ja) 2009-06-12 2009-06-12 額縁形鉄心

Publications (1)

Publication Number Publication Date
WO2010143710A1 true WO2010143710A1 (fr) 2010-12-16

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PCT/JP2010/059925 Ceased WO2010143710A1 (fr) 2009-06-12 2010-06-11 Noyau de fer en forme de cadre et son procédé d'assemblage

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JP (1) JP5604059B2 (fr)
WO (1) WO2010143710A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107731483A (zh) * 2017-09-26 2018-02-23 安徽盛泰电源科技有限责任公司 一种基于风光互补的高转化逆变器的磁芯结构
CN112840418A (zh) * 2018-11-01 2021-05-25 东芝产业机器系统株式会社 静态感应设备用层叠铁芯

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2665930T3 (es) 2010-09-02 2018-04-30 Abb Schweiz Ag Núcleo del transformador bobinado con estructura de soporte
JP6124393B2 (ja) * 2012-10-11 2017-05-10 タカオカ化成工業株式会社 モールド変圧器
JP6284261B2 (ja) * 2012-10-11 2018-02-28 タカオカ化成工業株式会社 モールド変圧器及びモールド変圧器に用いる鉄心の組み立て方法
JP7160589B2 (ja) * 2018-07-17 2022-10-25 東芝産業機器システム株式会社 静止誘導機器用巻鉄心
CN114188134A (zh) * 2021-11-16 2022-03-15 国网浙江省电力有限公司金华供电公司 一种降低铁心角部噪声的降噪结构和电力变压器

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS6320810A (ja) * 1986-07-15 1988-01-28 Hitachi Ltd 変圧器鉄心
JPS6320811A (ja) * 1986-07-15 1988-01-28 Hitachi Ltd 変圧器鉄心
JPH07220942A (ja) * 1994-02-03 1995-08-18 Toyo Denki Kk 変圧器の巻鉄心

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JPH0574634A (ja) * 1991-09-13 1993-03-26 Hiromichi Koshiishi 変圧器
JPH11307348A (ja) * 1998-04-20 1999-11-05 Hitachi Ltd 静止誘導器
JP2001189219A (ja) * 1999-12-28 2001-07-10 Toshiba Corp 静止誘導電気機器鉄心およびその組立方法
JP2002299129A (ja) * 2001-03-29 2002-10-11 Toshiba Corp 静止誘導電気機器鉄心

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6320810A (ja) * 1986-07-15 1988-01-28 Hitachi Ltd 変圧器鉄心
JPS6320811A (ja) * 1986-07-15 1988-01-28 Hitachi Ltd 変圧器鉄心
JPH07220942A (ja) * 1994-02-03 1995-08-18 Toyo Denki Kk 変圧器の巻鉄心

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107731483A (zh) * 2017-09-26 2018-02-23 安徽盛泰电源科技有限责任公司 一种基于风光互补的高转化逆变器的磁芯结构
CN112840418A (zh) * 2018-11-01 2021-05-25 东芝产业机器系统株式会社 静态感应设备用层叠铁芯
EP3876248A4 (fr) * 2018-11-01 2022-08-10 Toshiba Industrial Products and Systems Corporation Noyau empilé destiné à un appareil à induction stationnaire
US12033782B2 (en) 2018-11-01 2024-07-09 Toshiba Industrial Products and Systems Corp. Stacked core for stationary induction apparatus
CN112840418B (zh) * 2018-11-01 2024-09-06 东芝产业机器系统株式会社 静态感应设备用层叠铁芯

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