JP6077215B2 - Laminated iron core, leg iron core for static induction equipment and static induction equipment - Google Patents
Laminated iron core, leg iron core for static induction equipment and static induction equipment Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 98
- 230000006698 induction Effects 0.000 title claims description 14
- 230000003068 static effect Effects 0.000 title description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 51
- 239000010959 steel Substances 0.000 claims description 51
- 238000010030 laminating Methods 0.000 claims description 11
- 229910000976 Electrical steel Inorganic materials 0.000 description 11
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- -1 iron core (laminated iron Chemical group 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
本発明は、例えば変圧器やリアクトルといった静止誘導機器に用いられる積層鉄心に関するものである。 The present invention relates to a laminated core used in static induction equipment such as a transformer and a reactor.
例えばリアクトル等の静止誘導機器としては、特許文献１に示すように、複数のブロック鉄心をギャップを介して組み付けられる脚鉄心と、各脚鉄心の端部を連結する継鉄心とにより構成されている。 For example, as a static induction device such as a reactor, as shown in Patent Document 1, it is configured by a leg iron core in which a plurality of block iron cores are assembled via gaps, and a yoke core that connects ends of the leg iron cores. .
そして、上記脚鉄心は、幅の異なる複数の電磁鋼板を幅寸法別に積層してなる複数のブロック要素を重ね合わせて、外周が段形状を有する概略円筒形状となるように構成されている。また、このように構成された脚鉄心は、各ブロック要素を固定するために脚鉄心の外周に例えばガラステープ等の絶縁テープが巻回されてワニス含侵される。 And the said leg iron core is comprised so that the outer periphery may become the general | schematic cylindrical shape which has a step shape by superimposing the some block element formed by laminating | stacking several electromagnetic steel plates from which width differs according to width dimension. Further, the leg iron core configured in this manner is impregnated with a varnish by winding an insulating tape such as a glass tape around the outer circumference of the leg iron core in order to fix each block element.
しかしながら、上記構成の脚鉄心では、外周がブロック要素からなる段形状を有することから、絶縁テープが各ブロック要素のエッジにより破断されてしまうという問題がある。このため、各ブロック要素のエッジに絶縁テープ破断防止の対策（例えば保護部材を設ける等）が必要になってしまう。また、エッジよる破断を考慮して、絶縁テープ本来の強度で締め付けを行うことができないため、鉄心の剛性を向上させることが難しいという問題がある。 However, the leg iron core having the above-described configuration has a problem that the insulating tape is broken by the edge of each block element because the outer periphery has a step shape composed of block elements. For this reason, measures for preventing breakage of the insulating tape (for example, providing a protective member) are required at the edge of each block element. In addition, considering the breakage due to the edge, it is difficult to improve the rigidity of the iron core because it cannot be tightened with the original strength of the insulating tape.
また、脚鉄心外周とコイル内周の間に放熱空間を必要とし、スペーサを装着する必要があるところ、上記の通り、脚鉄心の外周が段形状を有することから、スペーサを安定して装着することが難しく、段形状に合った複数種類のスペーサを用いる必要がある。 In addition, a heat dissipation space is required between the outer circumference of the leg iron core and the inner circumference of the coil, and it is necessary to install a spacer. As described above, since the outer circumference of the leg iron core has a step shape, the spacer is stably installed. Therefore, it is necessary to use a plurality of types of spacers suitable for the step shape.
ここで、脚鉄心を構成する電磁鋼板として、種々の幅を有する電磁鋼板を用意することで、脚鉄心の外形を近似的に円形とすることも考えられるが、そうすると、用意する電磁鋼板の種類が膨大となってしまうだけでなく、その積層作業も煩雑になってしまうという問題がある。 Here, by preparing electromagnetic steel sheets having various widths as the electromagnetic steel sheets constituting the leg iron cores, it is conceivable to make the outer shape of the leg iron cores approximately circular. Not only becomes enormous, but also the lamination work becomes complicated.
さらに、高電圧用途では、脚鉄心における各ブロック要素にエッジがあることで、電荷の集中が起こり、絶縁破壊に繋がる。これを防止するためには絶縁距離を確保しなければならず、必要以上に大きいスペーサを設置しなければならない。このため、コイルの外形寸法が大きくなってしまう。 Furthermore, in high voltage applications, the presence of an edge in each block element in the leg iron core causes concentration of electric charges, leading to dielectric breakdown. In order to prevent this, an insulation distance must be secured, and a spacer larger than necessary must be installed. For this reason, the outer dimension of a coil will become large.
その上、従来の脚鉄心は概略円筒形状をなし、その中心に形成された貫通孔に固定ボルトが挿入されて、脚鉄心に継鉄心を締め付けることによって固定する構成である。このため、脚鉄心と継鉄心との締め付け力が、脚鉄心の径方向外側に行くに従って弱くなってしまい、脚鉄心と継鉄心との締め付けが不十分となり、騒音発生等の問題が生じてしまう。 In addition, the conventional leg iron core has a substantially cylindrical shape, and a fixing bolt is inserted into a through hole formed at the center thereof, and the leg iron core is fixed by tightening the yoke core. For this reason, the fastening force between the leg iron core and the yoke core becomes weaker as it goes outward in the radial direction of the leg iron core, and the fastening between the leg iron core and the yoke core becomes insufficient, causing problems such as noise generation. .
そこで本発明は、上記問題点を一挙に解決するためになされたものであり、積層鉄心を構成する電磁鋼板の種類をできるだけ少なくしながらも、積層鉄心の外形を近似的に円形状にすることができるとともに、その積層作業を容易にするだけでなく、当該積層鉄心と他の鉄心との締め付けを十分に行うことができるようにすることをその主たる課題とするものである。 Therefore, the present invention has been made to solve the above problems all at once, and while reducing the number of types of electromagnetic steel sheets constituting the laminated iron core as much as possible, the outer shape of the laminated iron core is approximately circular. In addition to facilitating the laminating operation, the main problem is to make it possible to sufficiently tighten the laminated iron core and another iron core.
すなわち本発明に係る積層鉄心は、概略矩形平板状をなす複数の電磁鋼板を、平面視における外形が概略円形状となるように積層して形成される積層鉄心であり、前記積層鉄心の中心から径方向に延びる少なくとも３つ以上の分割面によって分割された平面視における外形が概略扇形状をなす３つ以上の分割鉄心要素を備え、前記分割鉄心要素が、同一幅を有する複数の電磁鋼板からなる群を電磁鋼板群として、幅の異なる複数種類の電磁鋼板群が積層されることにより、平面視における外形が概略扇形状とされており、互いに隣接する分割鉄心要素の間それぞれに軸方向両端に開口する空間が形成されていることを特徴とする。 That is, the laminated iron core according to the present invention is a laminated iron core formed by laminating a plurality of electromagnetic steel plates having a substantially rectangular flat plate shape so that the outer shape in a plan view is a substantially circular shape, from the center of the laminated iron core. The outer shape in a plan view divided by at least three or more dividing surfaces extending in the radial direction includes three or more divided core elements each having a substantially fan shape, and the divided core elements are composed of a plurality of electrical steel sheets having the same width. As a group of electrical steel sheets, a plurality of types of electrical steel sheet groups having different widths are stacked, so that the outer shape in plan view is substantially fan-shaped, and both axial ends are arranged between adjacent core elements. A space that opens is formed.
このようなものであれば、積層鉄心を３つ以上の分割鉄心要素に分割し、当該分割鉄心要素が幅の異なる複数種類の電磁鋼板群を積層することによって概略扇形状として、これら３つ以上の分割鉄心要素を組み合わせるように構成しているので、積層鉄心を構成する電磁鋼板の種類をできるだけ少なくしながらも、積層鉄心を近似的に円形状とすることができ、絶縁テープの破断を防止するとともに、当該絶縁テープにより十分な締め付けを確保することができる。また、互いに隣接する分割鉄心要素の間それぞれに軸方向両端に開口する空間が形成されているので、当該空間に他の鉄心を締め付けるための固定軸部材を通すことによって、積層鉄心と他の鉄心とを複数の固定軸部材を用いて固定することができ、積層鉄心と他の鉄心との締め付けを当該接触面全体において均一且つ十分に行うことができる。 In such a case, the laminated iron core is divided into three or more divided core elements, and the divided iron core elements are stacked in a plurality of types of electrical steel sheet groups having different widths to form a substantially fan shape. Since the split core elements are combined, the number of types of magnetic steel sheets that make up the laminated core can be reduced as much as possible while the laminated core can be made approximately circular to prevent breakage of the insulating tape. In addition, sufficient tightening can be ensured by the insulating tape. In addition, since spaces are formed at both ends in the axial direction between the adjacent divided core elements, the laminated core and the other cores are passed by passing a fixed shaft member for fastening another core in the space. Can be fixed using a plurality of fixed shaft members, and the laminated core and the other core can be clamped uniformly and sufficiently over the entire contact surface.
互いに隣接する分割鉄心要素の間において、径方向中央部に最も大きい空間が形成されるものであることが望ましい。これならば、積層鉄心及び他の鉄心との締め付けを接触面全体で均一化することができる。 It is desirable that the largest space is formed in the central portion in the radial direction between the divided core elements adjacent to each other. If it is this, clamping | tightening with a laminated iron core and another iron core can be equalize | homogenized over the whole contact surface.
前記各分割鉄心要素が略同一形状をなすものであることが望ましい。これならば、積層鉄心を構成する分割鉄心要素を共通化して、電磁鋼板の種類をより一層低減することができる。また、各分割鉄心要素を略同一形状とすることによって、積層鉄心をその中心に対して対称形状とすることができるので、固定軸部材が通される空間も中心に対して対称位置に形成されることになり積層鉄心と他の鉄心との締め付けを当該接触面全体においてより均一にすることができる。 It is desirable that the divided core elements have substantially the same shape. If it is this, the division | segmentation core element which comprises a laminated iron core can be made shared, and the kind of electromagnetic steel plate can be reduced further. Further, by making each divided core element substantially the same shape, the laminated core can be made symmetrical with respect to the center thereof, so that the space through which the fixed shaft member is passed is also formed at a symmetrical position with respect to the center. As a result, the fastening between the laminated core and the other cores can be made more uniform over the entire contact surface.
また本発明に係る静止誘導機器は、複数の脚鉄心と、当該複数の脚鉄心の上面同士及び下面同士を連結して閉磁路を形成する複数の継鉄心とを備えた静止誘導機器であって、前記脚鉄心が、概略矩形平板状をなす複数の電磁鋼板を、平面視における外形が概略円形状となるように、幅方向にずらして積層して形成される積層鉄心であり、前記積層鉄心の中心から径方向に延びる少なくとも３つ以上の分割面によって分割された平面視における外形が概略扇形状をなす３つ以上の分割鉄心要素を備え、前記分割鉄心要素が、同一幅を有する複数の電磁鋼板からなる群を電磁鋼板群として、当該電磁鋼板群を構成する電磁鋼板の幅が異なる複数種類の電磁鋼板群が積層されることにより、平面視における外形が概略扇形状とされており、互いに隣接する分割鉄心要素の間それぞれに形成された軸方向両端に開口する空間に、前記継鉄心を前記脚鉄心に固定するための固定軸部材が通されており、前記各脚鉄心と前記継鉄心とが複数の固定軸部材を介して固定されていることを特徴とする。 The stationary induction device according to the present invention is a stationary induction device comprising a plurality of leg iron cores and a plurality of yoke cores that connect the upper and lower surfaces of the plurality of leg iron cores to form a closed magnetic circuit. The leg iron core is a laminated iron core formed by laminating a plurality of electrical steel sheets having a substantially rectangular flat plate shape, shifted in the width direction so that the outer shape in plan view is substantially circular, and the laminated iron core Three or more divided core elements whose outer shape in a plan view divided by at least three or more divided surfaces extending in the radial direction from the center of each of the plurality of divided core elements has a substantially fan shape, and the divided core elements include a plurality of pieces having the same width. A group consisting of electromagnetic steel sheets is regarded as an electromagnetic steel sheet group, and a plurality of types of electromagnetic steel sheet groups having different widths of the electromagnetic steel sheets constituting the electromagnetic steel sheet group are laminated, and the outer shape in plan view is substantially fan-shaped, Next to each other A fixed shaft member for fixing the yoke core to the leg iron cores is passed through spaces formed at both ends in the axial direction formed between the divided iron core elements, and the leg iron cores and the yoke cores. Is fixed through a plurality of fixed shaft members.
このようなものであれば、脚鉄心を３つ以上の分割鉄心要素に分割し、当該分割鉄心要素が幅の異なる複数種類の電磁鋼板群を積層することによって概略扇形状として、これら３つ以上の分割鉄心要素を組み合わせるように構成しているので、脚鉄心を構成する電磁鋼板の種類をできるだけ少なくしながらも、脚鉄心を近似的に円形状とすることができ、絶縁テープの破断を防止するとともに、当該絶縁テープにより十分な締め付けを確保することができる。また、互いに隣接する分割鉄心要素の間それぞれに軸方向両端に開口する空間が形成されているので、当該空間に継鉄心を締め付けるための固定軸部材を通すことによって、脚鉄心と継鉄心とを複数の固定軸部材を用いて固定することができ、脚鉄心と脚鉄心との締め付けを当該接触面全体において均一且つ十分に行うことができる。 In such a case, the leg iron core is divided into three or more divided core elements, and the divided iron core elements are stacked in a plurality of types of electrical steel sheets having different widths to form a substantially fan shape, and these three or more Since the split core elements are combined, the number of types of electrical steel sheets that make up the leg iron core can be reduced as much as possible, while the leg iron core can be made approximately circular, preventing breakage of the insulating tape. In addition, sufficient tightening can be ensured by the insulating tape. In addition, since spaces are formed at both ends in the axial direction between the adjacent core elements that are adjacent to each other, the leg core and the core can be connected by passing a fixed shaft member for tightening the yoke core in the space. It can fix using a some fixed shaft member, and can clamp a leg iron core and a leg iron core uniformly and fully in the said whole contact surface.
このように構成した本発明によれば、積層鉄心を構成する電磁鋼板の種類をできるだけ少なくしながらも、積層鉄心の外形を近似的に円形状にすることができるとともに、その積層作業を容易にするだけでなく、当該積層鉄心と他の鉄心との締め付けを十分に行うことができる。 According to the present invention configured as described above, the outer shape of the laminated iron core can be made approximately circular while reducing the types of electromagnetic steel sheets constituting the laminated iron core as much as possible, and the laminating work can be easily performed. In addition, the laminated iron core and other iron cores can be sufficiently tightened.
以下に本発明に係る積層鉄心を用いた静止誘導機器の一実施形態について図面を参照して説明する。 An embodiment of a stationary induction device using a laminated iron core according to the present invention will be described below with reference to the drawings.
本実施形態に係る静止誘導機器１００は、例えば変圧器やリアクトルであり、図１に示すように、複数の脚鉄心２と、当該複数の脚鉄心２の上端面同士を連結する上部継鉄心３と、前記複数の脚鉄心２の下端面同士を連結する下部継鉄心４とを備えている。そして、脚鉄心２には、一次巻線５又は二次巻線６が適宜巻回されている。 The stationary induction device 100 according to the present embodiment is, for example, a transformer or a reactor, and as shown in FIG. 1, a plurality of leg cores 2 and an upper yoke core 3 that connects upper end surfaces of the plurality of leg cores 2. And a lower yoke core 4 that connects lower end surfaces of the plurality of leg iron cores 2. A primary winding 5 or a secondary winding 6 is appropriately wound around the leg iron core 2.
そして、脚鉄心２は、図２に示すように、概略矩形平板状をなす複数の電磁鋼板２００を、平面視における外形が概略円形状となるように、幅方向にずらして積層して形成される積層鉄心である。なお、電磁鋼板２００は、例えば表面に絶縁皮膜が施された方向性電磁鋼板（珪素鋼板）により形成されており、その板厚が例えば約０．３ｍｍの長尺形状をなすものである。 As shown in FIG. 2, the leg iron core 2 is formed by laminating a plurality of electromagnetic steel plates 200 having a substantially rectangular flat plate shape while being shifted in the width direction so that the outer shape in a plan view is a substantially circular shape. It is a laminated iron core. The electromagnetic steel sheet 200 is formed of, for example, a directional electromagnetic steel sheet (silicon steel sheet) having an insulating film on its surface, and has a long shape with a thickness of, for example, about 0.3 mm.
具体的に脚鉄心２は、図２〜図１１に示すように、脚鉄心２の中心Ｏ（図３参照）から径方向に延びる少なくとも３つの分割面Ｘ１〜Ｘ３によって分割された平面視における外形が概略扇形状をなす３つの分割鉄心要素２１ａ、２１ｂ、２１ｃを備えている。 Specifically, as shown in FIGS. 2 to 11, the leg iron core 2 has an outer shape in plan view divided by at least three divided surfaces X1 to X3 extending in the radial direction from the center O (see FIG. 3) of the leg iron core 2. Are provided with three divided core elements 21a, 21b, 21c having a substantially fan shape.
各分割鉄心要素２１ａ、２１ｂ、２１ｃは、特に図３及び図４に示すように、平面視において同一形状をなすものであり、幅の異なる複数種類の電磁鋼板群２１１を積層することによって、平面視における外形が概略扇形状とされている。なお、本実施形態では、概略円形状をなす脚鉄心２を３分割して分割鉄心要素２１ａ、２１ｂ、２１ｃを形成しているので、各分割鉄心要素２１ａ、２１ｂ、２１ｃの扇形状の中心角度は、１２０度である。 Each of the divided core elements 21a, 21b, and 21c has the same shape in plan view as shown in FIG. 3 and FIG. 4 in particular, and by laminating a plurality of types of electrical steel sheet groups 211 having different widths, The outer shape when viewed is generally fan-shaped. In the present embodiment, the substantially circular leg iron core 2 is divided into three parts to form the divided iron core elements 21a, 21b, and 21c. Therefore, the sector-shaped center angle of each divided iron core element 21a, 21b, and 21c. Is 120 degrees.
より詳細には、特に図４に示すように、各分割鉄心要素２１ａ、２１ｂ、２１ｃにおいて、中心部にある電磁鋼板群２１１が最も大きな幅を有する電磁鋼板群２１１であり、その両側に外側に行くに従って徐々に幅の小さい電磁鋼板群２１１が配置されることによって平面視における外形が概略扇形状となるように構成されている。なお、各分割鉄心要素２１ａ、２１ｂ、２１ｃは、中心にある電磁鋼板群２１１に対して左右対称形状となるように幅の小さい電磁鋼板群２１１が配置される。 More specifically, as shown in FIG. 4 in particular, in each of the divided core elements 21a, 21b, 21c, the electromagnetic steel plate group 211 in the center is the electromagnetic steel plate group 211 having the largest width, and outward on both sides thereof. By arranging the magnetic steel sheet group 211 having a gradually smaller width as it goes, the outer shape in a plan view is configured to have a substantially fan shape. In addition, each divided iron core element 21a, 21b, 21c is arranged with a small electrical steel plate group 211 so as to be symmetrical with respect to the central electrical steel plate group 211.
そして、この各分割鉄心要素２１ａ、２１ｂ、２１ｃの外側面は、概略円弧状となるように構成されている。つまり、各電磁鋼板群２１１を幅方向のずらすことによって、電磁鋼板群２１１を構成する電磁鋼板２００の外側端部が同一円上に位置するように構成されている。このとき、各電磁鋼板群２１１を構成する電磁鋼板２００の内側端部は同一円上に位置することになる。 And the outer surface of each of the divided core elements 21a, 21b, 21c is configured to have a substantially arc shape. That is, the outer end portions of the electromagnetic steel sheets 200 constituting the electromagnetic steel sheet group 211 are positioned on the same circle by shifting the electromagnetic steel sheet groups 211 in the width direction. At this time, the inner side ends of the electromagnetic steel sheets 200 constituting each electromagnetic steel sheet group 211 are located on the same circle.
このように構成された３つの分割鉄心要素２１ａ、２１ｂ、２１ｃを組み合わせて、平面視における外形が概略円形状となる脚鉄心２が形成される。このとき、互いに隣接する分割鉄心要素（２１ａ及び２１ｂ、２１ｂ及び２１ｃ、２１ｃ及び２１ａ）の間には、軸方向両端に開口する軸方向に沿って延びる複数の空間Ｓが形成される。 By combining the three divided core elements 21a, 21b, and 21c configured as described above, the leg core 2 having a substantially circular outer shape in plan view is formed. At this time, a plurality of spaces S extending along the axial direction opening at both ends in the axial direction are formed between the divided core elements (21a and 21b, 21b and 21c, 21c and 21a) adjacent to each other.
各空間Ｓは、図５に示すように、互いに隣接する分割鉄心要素それぞれにおいて、１つの電磁鋼板群Ａを構成する電磁鋼板２００の内側端面と、当該電磁鋼板群Ａに隣接する幅の大きい電磁鋼板群Ｂにおいて、前記電磁鋼板群Ａに接触する電磁鋼板２００の側面とから形成される凹部２１Ｍによって形成される。 As shown in FIG. 5, each space S includes an inner end face of the electromagnetic steel sheet 200 constituting one electromagnetic steel sheet group A and a wide electromagnetic wave adjacent to the electromagnetic steel sheet group A in each of the divided core elements adjacent to each other. In the steel plate group B, the concave portion 21M is formed from the side surface of the electromagnetic steel plate 200 that contacts the electromagnetic steel plate group A.
そして、互いに隣接する分割鉄心要素の間に形成された複数の空間Ｓのうち所定の１つが、脚鉄心２に継鉄心３、４を締め付けて固定するための固定軸部材７が挿入される挿入空間Ｓａとされる。本実施形態では、この挿入空間Ｓａは、互いに隣接する分割鉄心要素（２１ａ及び２１ｂ、２１ｂ及び２１ｃ、２１ｃ及び２１ａ）の間において、径方向中央部に形成されて、最も大きい空間Ｓである。このように所定の１つの空間Ｓを最も大きくするための構成としては、当該空間Ｓを電磁鋼板２００の内側端面により形成する電磁鋼板群２１１の枚数を、他の電磁鋼板群２１１よりも多くすることによって挿入空間Ｓａを大きくすることができる。 Then, a predetermined one of the plurality of spaces S formed between the divided core elements adjacent to each other is inserted into which the fixed shaft member 7 for fixing the yoke cores 3 and 4 to the leg iron core 2 is fixed. Space Sa is assumed. In the present embodiment, the insertion space Sa is the largest space S that is formed at the central portion in the radial direction between the divided core elements (21a and 21b, 21b and 21c, 21c and 21a) adjacent to each other. As described above, as a configuration for maximizing the predetermined one space S, the number of the electromagnetic steel sheet groups 211 that form the space S by the inner end face of the electromagnetic steel sheet 200 is larger than that of the other electromagnetic steel sheet groups 211. Accordingly, the insertion space Sa can be increased.
次にこのように構成した脚鉄心２の製造方法について簡単に説明する。まず、幅の異なる複数種類の電磁鋼板２００を多数準備する。そして、幅が同一の電磁鋼板２００を所定枚数積層して電磁鋼板群２１１を構成する。このように準備した幅の異なる複数種類の電磁鋼板群２１１を積層した後、円弧形状を有する型に電磁極板群２１１の幅方向一端側を押し当てることにより、電磁極板群２１１の幅方向一端部が円弧状となり分割鉄心要素２１ａ、２１ｂ、２１ｃが形成される。このとき、分割鉄心要素２１ａ、２１ｂ、２１ｃを構成する電磁鋼板２００を溶接等により一体化する。このように構成した分割鉄心要素２１ａ、２１ｂ、２１ｃを組み合わせることによって脚鉄心２が構成される。ここで、各分割鉄心要素２１ａ、２１ｂ、２１ｃを固定するために脚鉄心２の外周に絶縁テープ（例えばガラステープ）を巻回して、ワニス含侵する。 Next, the manufacturing method of the leg iron core 2 comprised in this way is demonstrated easily. First, a plurality of types of electromagnetic steel sheets 200 having different widths are prepared. A predetermined number of electromagnetic steel plates 200 having the same width are stacked to constitute the electromagnetic steel plate group 211. After laminating a plurality of types of electromagnetic steel plate groups 211 having different widths prepared in this way, one end side in the width direction of the electromagnetic electrode plate group 211 is pressed against a mold having an arc shape, whereby the width direction of the electromagnetic electrode plate group 211 is determined. One end portion is arcuate, and the split core elements 21a, 21b, 21c are formed. At this time, the electromagnetic steel sheets 200 constituting the divided core elements 21a, 21b, and 21c are integrated by welding or the like. The leg core 2 is configured by combining the split core elements 21a, 21b, and 21c configured as described above. Here, in order to fix each divided core element 21a, 21b, 21c, an insulating tape (for example, glass tape) is wound around the outer periphery of the leg core 2, and the varnish is impregnated.
そして、この脚鉄心２の上端面及び下端面に継鉄心３、４を接触させた後、継鉄心３、４に形成された固定用貫通孔及び脚鉄心２に形成された挿入空間Ｓａに固定軸部材７を挿入するとともに、当該固定軸部材７の両端部に設けられた雄ねじ部にナット部材８を螺合させることによって、継鉄心３、４を脚鉄心２に締め付けて固定する（図１参照）。 And after making the yoke cores 3 and 4 contact the upper end surface and lower end surface of this leg iron core 2, it fixes to insertion space Sa formed in the through-hole for fixation formed in the yoke cores 3 and 4 and the leg iron core 2 While inserting the shaft member 7, the nut members 8 are screwed into the male screw portions provided at both ends of the fixed shaft member 7, thereby fastening and fixing the yoke cores 3 and 4 to the leg iron core 2 (FIG. 1). reference).
このように構成した本実施形態に係る静止誘導機器１００によれば、脚鉄心２を３つの分割鉄心要素２１ａ、２１ｂ、２１ｃに分割し、当該分割鉄心要素２１ａ、２１ｂ、２１ｃが幅の異なる複数種類の電磁鋼板群２１１を積層することによって概略扇形状として、これら３つの分割鉄心要素２１ａ、２１ｂ、２１ｃを組み合わせるように構成しているので、脚鉄心２を構成する電磁鋼板２００の種類をできるだけ少なくしながらも、脚鉄心２を近似的に円形状とすることができ、絶縁テープの破断を防止するとともに、当該絶縁テープにより十分な締め付けを確保することができる。また、互いに隣接する分割鉄心要素２１ａ、２１ｂ、２１ｃの間それぞれに軸方向両端に開口する空間Ｓが形成されているので、当該空間Ｓに継鉄心３、４を締め付けるための固定軸部材７を通すことによって、脚鉄心２と継鉄心３、４とを３本の固定軸部材７及びナット部材８を用いて固定することができるので、脚鉄心２と継鉄心３、４との締め付けを当該接触面全体において均一且つ十分に行うことができる。 According to the stationary induction device 100 according to the present embodiment configured as described above, the leg iron core 2 is divided into three divided core elements 21a, 21b, and 21c, and the divided core elements 21a, 21b, and 21c have a plurality of different widths. Since the three divided core elements 21a, 21b, and 21c are combined to form a substantially fan shape by stacking the types of electromagnetic steel sheet groups 211, the types of the electromagnetic steel sheets 200 constituting the leg core 2 can be as much as possible. Although the number of the leg iron cores 2 can be reduced to a substantially circular shape, the insulation tape can be prevented from being broken and sufficient tightening can be ensured by the insulation tape. In addition, since spaces S that are open at both ends in the axial direction are formed between the divided core elements 21a, 21b, and 21c adjacent to each other, the fixed shaft member 7 for fastening the yoke cores 3 and 4 to the space S is provided. By passing, the leg iron core 2 and the yoke cores 3 and 4 can be fixed using the three fixed shaft members 7 and the nut member 8, so that the fastening between the leg iron core 2 and the yoke cores 3 and 4 is concerned. It can be performed uniformly and sufficiently over the entire contact surface.
また、各分割鉄心要素２１ａ、２１ｂ、２１ｃが同一構成、同一形状をなすものであることから、部品点数を削減することができるとともに、積層作業を容易にすることができる。さらに分割鉄心要素２１ａ、２１ｂ、２１ｃが同一形状であることから、固定軸部材７を挿入する挿入空間Ｓａが脚鉄心２の中心に対して対称位置に形成されることになり、脚鉄心２に継鉄心３、４を締め付け固定した場合に、脚鉄心２に対する継鉄心３、４の締め付け力を均一化することができる。 Moreover, since each divided core element 21a, 21b, 21c has the same configuration and the same shape, the number of parts can be reduced and the laminating operation can be facilitated. Furthermore, since the divided core elements 21a, 21b, and 21c have the same shape, the insertion space Sa into which the fixed shaft member 7 is inserted is formed at a symmetrical position with respect to the center of the leg core 2, so When the yoke cores 3 and 4 are fastened and fixed, the fastening force of the yoke cores 3 and 4 with respect to the leg iron core 2 can be made uniform.
なお、本発明は前記実施形態に限られるものではない。 The present invention is not limited to the above embodiment.
例えば、前記実施形態では、脚鉄心２を３分割した場合について説明したが、４つ以上に分割したものであっても良い。図１２に脚鉄心２を４等分割した場合について示す。このとき当該脚鉄心は、脚鉄心２の中心Ｏから径方向に延びる４つの分割面Ｘ１〜Ｘ４によって分割された平面視における外形が概略扇形状をなす４つの分割鉄心要素２１ａ〜２１ｄを有する。 For example, in the above-described embodiment, the case where the leg iron core 2 is divided into three has been described, but it may be divided into four or more. FIG. 12 shows a case where the leg iron core 2 is divided into four equal parts. At this time, the leg iron core has four divided core elements 21a to 21d whose outer shape in plan view divided by four divided surfaces X1 to X4 extending in the radial direction from the center O of the leg iron core 2 has a substantially fan shape.
このように脚鉄心２を４分割することができるが、分割数を増やすほど部品点数が増えてしまうこと及び鉄心の占積率が低下してしまうことから、前記実施形態の３つが最も好ましい。なお、２分割した場合には、挿入空間Ｓａが脚鉄心２の中心Ｏに対して対向した２箇所に形成されることから、当該２箇所により継鉄心３、４を締め付け固定した場合に、当該２箇所から９０度回転した位置の締め付けが弱くなってしまう。 Thus, although the leg iron core 2 can be divided into four parts, the number of parts increases and the space factor of an iron core falls, so that the number of division | segmentation increases, and three of the said embodiment are the most preferable. In addition, when divided into two, since the insertion space Sa is formed at two locations opposed to the center O of the leg iron core 2, when the yoke cores 3 and 4 are fastened and fixed by the two locations, The tightening at the position rotated 90 degrees from the two places becomes weak.
その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
１００・・・静止誘導機器
２００・・・電磁鋼板
Ｘ１〜Ｘ３・・・分割面
２・・・脚鉄心（積層鉄心）
２１ａ、２１ｂ、２１ｃ・・・分割鉄心要素
２１１・・・電磁鋼板群
Ｓ・・・空間
Ｓａ・・・挿入空間
３、４・・・継鉄心
７・・・固定軸部材
８・・・ナット部材
DESCRIPTION OF SYMBOLS 100 ... Static induction apparatus 200 ... Electromagnetic steel plate X1-X3 ... Dividing surface 2 ... Leg iron core (laminated iron core)
21a, 21b, 21c ... split core element 211 ... electromagnetic steel sheet group S ... space Sa ... insertion space 3, 4 ... yoke core 7 ... fixed shaft member 8 ... nut member
Claims (4)
前記積層鉄心の中心から径方向に延びる少なくとも３つ以上の分割面によって分割された平面視における外形が概略扇形状をなす３つ以上の分割鉄心要素を備え、
前記分割鉄心要素が、同一幅を有する複数の電磁鋼板からなる群を電磁鋼板群として、幅の異なる複数種類の電磁鋼板群が積層されることにより、平面視における外形が概略扇形状とされており、
互いに隣接する分割鉄心要素の間それぞれに軸方向両端に開口する空間が形成されており、
互いに隣接する分割鉄心要素の間において、径方向中央部に最も大きい空間が形成されるものである積層鉄心。 A laminated iron core formed by laminating a plurality of electromagnetic steel plates having a substantially rectangular flat plate shape so that the outer shape in plan view is a substantially circular shape,
Comprising three or more divided core elements in which the outer shape in plan view divided by at least three or more divided surfaces extending in the radial direction from the center of the laminated core has a generally fan shape;
The divided iron core element is a group of a plurality of electromagnetic steel sheets having the same width, and a plurality of types of electromagnetic steel sheet groups having different widths are laminated so that the outer shape in plan view is substantially fan-shaped. And
A space that is open at both ends in the axial direction is formed between the core elements adjacent to each other,
A laminated core in which a largest space is formed in a central portion in the radial direction between divided core elements adjacent to each other.
前記脚鉄心が、概略矩形平板状をなす複数の電磁鋼板を、平面視における外形が概略円形状となるように、幅方向にずらして積層して形成される積層鉄心であり、
前記積層鉄心の中心から径方向に延びる少なくとも３つ以上の分割面によって分割された平面視における外形が概略扇形状をなす３つ以上の分割鉄心要素を備え、
前記分割鉄心要素が、同一幅を有する複数の電磁鋼板からなる群を電磁鋼板群として、当該電磁鋼板群を構成する電磁鋼板の幅が異なる複数種類の電磁鋼板群が積層されることにより、平面視における外形が概略扇形状とされており、
互いに隣接する分割鉄心要素の間それぞれに形成された軸方向両端に開口する空間に、前記継鉄心を前記脚鉄心に固定するための固定軸部材が通されており、前記各脚鉄心と前記継鉄心とが複数の固定軸部材を介して固定されている静止誘導機器。 A stationary induction device comprising a plurality of leg iron cores and a plurality of yoke cores that connect the upper and lower surfaces of the leg iron cores to form a closed magnetic circuit,
The leg iron core is a laminated iron core formed by laminating a plurality of electromagnetic steel sheets having a substantially rectangular flat plate shape, shifted in the width direction so that the outer shape in a plan view is a substantially circular shape,
Comprising three or more divided core elements in which the outer shape in plan view divided by at least three or more divided surfaces extending in the radial direction from the center of the laminated core has a generally fan shape;
The divided iron core element is a group consisting of a plurality of electromagnetic steel sheets having the same width, and a plurality of types of electromagnetic steel sheet groups having different widths of the electromagnetic steel sheets constituting the electromagnetic steel sheet group are laminated to form a plane. The outer shape in view is roughly fan-shaped,
A fixed shaft member for fixing the yoke core to the leg iron core is passed through a space opened at both ends in the axial direction formed between the adjacent divided iron core elements, and each leg iron core and the joint are connected to each other. A stationary induction device in which an iron core is fixed via a plurality of fixed shaft members.
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| FR2482362A1 (en) * | 1980-05-12 | 1981-11-13 | Alsthom Atlantique | SHUNT INDUCTANCE ELECTRICAL COIL |
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