JP5426356B2 - Winding core and method for assembling the same - Google Patents

Winding core and method for assembling the same Download PDF

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JP5426356B2
JP5426356B2 JP2009291139A JP2009291139A JP5426356B2 JP 5426356 B2 JP5426356 B2 JP 5426356B2 JP 2009291139 A JP2009291139 A JP 2009291139A JP 2009291139 A JP2009291139 A JP 2009291139A JP 5426356 B2 JP5426356 B2 JP 5426356B2
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sheet
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重紀 岡田
孝 長谷川
明 日向野
知司 座馬
重嘉 酒井
久 伊藤
信夫 楢原
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タカオカ化成工業株式会社
株式会社関電工
株式会社アット東京
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Description

本発明は、巻鉄心及びその組み立て方法に関するものである。   The present invention relates to a wound core and an assembling method thereof.

よく知られるように、変圧器は、磁気回路を構成する鉄心に導電回路を構成するコイルを装着して構成される。鉄心の構造は各種のものがあるが、そのうちの一つに、所定の幅にスリットされた帯板状の方向性珪素鋼板を巻板機で所定形状に巻き付け、焼きなましを行った巻鉄心と称されるものがある。特に、本発明が対象とする巻鉄心は、カット方式であり、カット部分に位置を階段状にずらすように複数枚の珪素鋼板を径方向に密着させて重ねて構成されるブロックを、複数ブロック用意し、その複数ブロックをさらに径方向に密着して重ねるように構成される。   As is well known, a transformer is configured by mounting a coil constituting a conductive circuit on an iron core constituting a magnetic circuit. There are various types of iron core structures, one of which is called a wound iron core in which a strip-shaped directional silicon steel sheet slit to a predetermined width is wound into a predetermined shape by a winding machine and annealed. There is something to be done. In particular, the wound iron core to which the present invention is directed is a cutting method, and a plurality of blocks configured by overlapping a plurality of silicon steel plates in close contact with each other in a radial direction so as to shift the position of the cut portion in a stepped manner. The plurality of blocks are prepared, and are configured to be further closely adhered in the radial direction.

係る巻鉄心は、カット方式のため、カット部分にギャップが生じる。そのようなギャップ入りの巻鉄心において、残留磁束密度を小さくすることによって、電圧印加時の過渡磁束密度の大きさを小さくし励磁突入電流を低減したいという要求があり、従来特許文献１に開示された発明が提案されている。   Since such a wound iron core is a cutting method, a gap occurs in the cut portion. In such a wound core with a gap, there is a demand to reduce the magnitude of the transient magnetic flux density at the time of voltage application and to reduce the magnetizing inrush current by reducing the residual magnetic flux density. Proposed inventions have been proposed.

この特許文献１に開示された発明は、図１に示すように、カット部分２の位置を階段状にずらせた複数枚の電磁鋼帯１′からなる電磁鋼帯群１を複数群、径方向に密着させて重ねて形成されるワンターンカット形の巻鉄心において、一群の電磁鋼帯群１のカット部分群６に、そのカット部分群６より長い長さの第１絶縁体３を配置すると共に、隣接する電磁鋼帯群１の間にも電磁鋼帯同士が接触しないように第２絶縁体４を配置する構成を採る。   As shown in FIG. 1, the invention disclosed in Patent Document 1 includes a plurality of electromagnetic steel strip groups 1 each including a plurality of electromagnetic steel strips 1 ′ in which the positions of the cut portions 2 are shifted stepwise. In the one-turn cut type wound core formed in close contact with each other, the first insulator 3 having a length longer than the cut portion group 6 is disposed in the cut portion group 6 of the group of electromagnetic steel strip groups 1. The second insulator 4 is arranged so that the electromagnetic steel strips do not contact each other between the adjacent electromagnetic steel strip groups 1.

特許第３５７４９５５号公報Japanese Patent No. 3574955

上記のように特許文献１に開示された技術では、隣接する電磁鋼帯群１同士が接触しないようにするため、少なくとも第２絶縁体４は、リング状に形成された電磁鋼帯群の全周に渡り配置することになる。   As described above, in the technique disclosed in Patent Document 1, in order to prevent adjacent electromagnetic steel strip groups 1 from coming into contact with each other, at least the second insulator 4 is made up of all of the electromagnetic steel strip groups formed in a ring shape. It will be placed over the circumference.

そのため、図１から明らかなように、各隣接する電磁鋼帯群１間に第１，第２絶縁体３，４が介在することになり、鉄心における磁性体の占有比率が少なくなり、所望の特性を得るためには、大型化・重量化を避けられなくなるといった新たな問題を生じる。   Therefore, as is apparent from FIG. 1, the first and second insulators 3 and 4 are interposed between the adjacent electromagnetic steel strip groups 1, and the occupation ratio of the magnetic body in the iron core is reduced, and the desired In order to obtain the characteristics, there arises a new problem that an increase in size and weight cannot be avoided.

さらに、係る構成の巻鉄心を組み立てるには、電磁鋼帯群１ごとにそのカット部分２内に第１絶縁体３を装着する処理を行う。そして、第１絶縁体３は、カット部分群６の全長よりも長いため、その第１絶縁体３の両端はそれぞれ電磁鋼帯群１の表面に突出する。従って、その突出した第１絶縁体３の両端部分が、電磁鋼帯群１の表面に接触した状態を保ちつつ、隣接する電磁鋼帯群１間に第２絶縁体４を全面にわたり介在させるように配置する処理を行う。従って、ある隣接する電磁鋼板群１間に第２絶縁体４を配置するには、それぞれの電磁鋼帯群１の表面に突出した第１絶縁体３と、第２絶縁体４が適宜の順に、しかも、相互に密着するように配置する必要があり、その作業は煩雑となる。   Furthermore, in order to assemble the wound iron core having such a configuration, a process of mounting the first insulator 3 in the cut portion 2 for each electromagnetic steel strip group 1 is performed. And since the 1st insulator 3 is longer than the full length of the cut part group 6, the both ends of the 1st insulator 3 protrude on the surface of the electromagnetic steel strip group 1, respectively. Accordingly, the second insulator 4 is interposed between the adjacent electromagnetic steel strip groups 1 over the entire surface while the protruding end portions of the first insulator 3 are in contact with the surface of the electromagnetic steel strip group 1. Process to place in. Therefore, in order to arrange the second insulator 4 between a certain adjacent electromagnetic steel sheet group 1, the first insulator 3 and the second insulator 4 protruding from the surface of each electromagnetic steel strip group 1 are arranged in an appropriate order. And it is necessary to arrange | position so that it may mutually contact | abut, The operation | work becomes complicated.

そこで、組み立て作業が容易に行え、小型化・軽量化を図りつつ励磁突入電流を低減したいという課題がある。   Therefore, there is a problem that assembly work can be easily performed, and it is desired to reduce the magnetizing inrush current while reducing the size and weight.

上述した課題を解決するために、本発明に係る巻鉄心は、（１）ループ状の磁性ブロックを径方向に複数個積層して構成され、各磁性ブロックは、複数の磁性帯板を径方向に積層するとともに、各磁性帯板の両先端間に形成されるカット部分の位置をずらして形成される巻鉄心であって、前記カット部分に非磁性シートを連続した状態で配置し、前記非磁性シートは、径方向に隣接する前記磁性ブロック間で折り返して、その隣接する磁性ブロックの前記カット部分でも連続した状態で配置し、前記複数の磁性ブロックの外周から内周に渡るように構成した。 In order to solve the above-described problems, a wound iron core according to the present invention is (1) configured by laminating a plurality of loop-shaped magnetic blocks in the radial direction, and each magnetic block includes a plurality of magnetic strips in the radial direction. And is formed by shifting the position of the cut portion formed between both ends of each magnetic strip, and a non-magnetic sheet is continuously arranged in the cut portion, The magnetic sheet is folded between the magnetic blocks adjacent to each other in the radial direction, and is arranged in a continuous state even in the cut portion of the adjacent magnetic block, and is configured to extend from the outer periphery to the inner periphery of the plurality of magnetic blocks. .

このような構成を採ることで、実験の結果残留磁束密度が低減していることが確認された。そして、カット部分の位置をずらすことから、磁性帯板の先端は階段状に突出し、片側のみに着目してみると、その積層方向内面或いは積層方向外面の少なくとも一方が露出することになる。そして、磁性帯板の両先端同士を接近させて所望のカット部分を形成した場合、磁性帯板の一方の先端は、積層方向で隣接する磁性帯板の両先端間のカット部分を跨ぐ（覆う）ような配置となる。そこで、ある磁性帯板内を流れる磁束は、本来カット部分（非磁性のエアギャップ部分）を通過すべきところ、非磁性シート部材がないと、隣接する磁性帯板内を通り、エアギャップ部分を迂回することになるが、本発明では、磁性帯板の先端の上記の露出する部分には、非磁性シート部材が配置されるため、係る迂回する経路を遮断してカット部分を通過させるか、仮に迂回する経路をとっても隣接する磁性帯板間に介在される非磁性シート部材を通過させることができる。   As a result of the experiment, it was confirmed that the residual magnetic flux density was reduced by adopting such a configuration. Since the position of the cut portion is shifted, the tip of the magnetic strip protrudes stepwise, and when attention is paid to only one side, at least one of the inner surface in the stacking direction or the outer surface in the stacking direction is exposed. Then, when a desired cut portion is formed by bringing both ends of the magnetic strips close to each other, one tip of the magnetic strip extends over (covers) the cut portion between both ends of adjacent magnetic strips in the stacking direction. ). Therefore, the magnetic flux flowing in a certain magnetic strip should pass through the cut portion (nonmagnetic air gap portion), but if there is no nonmagnetic sheet member, it passes through the adjacent magnetic strip and passes through the air gap portion. In the present invention, since the non-magnetic sheet member is arranged at the exposed portion of the tip of the magnetic strip in the present invention, the path to be bypassed is cut off and the cut portion is passed, Even if a detour path is taken, a non-magnetic sheet member interposed between adjacent magnetic strips can be passed.

そして、非磁性シート部材は、カット部分の位置に連続して配置されることから、それ以外の磁性ブロック・磁性帯板の全面に配置されず、巻鉄心における磁性体の存在比率を多くする（非磁性シート部材の存在比率を少なくする）ことができ、小型化・軽量化を図ることができる。   And since the nonmagnetic sheet member is continuously arranged at the position of the cut portion, it is not arranged on the entire surface of the other magnetic blocks / magnetic strips, and the presence ratio of the magnetic substance in the wound iron core is increased ( The existence ratio of the nonmagnetic sheet member can be reduced), and the size and weight can be reduced.

また、非磁性シート部材の材質は、所望の樹脂フィルムでも良いし、絶縁紙その他の各種の材料からなるシート部材を用いることができる。具体的には、例えば、高分子製フィルム、高分子製繊維シート、表面コーテイングシート、樹脂含浸シート、絶縁紙、不織布、ガラスクロスシート等を用いることができる。適宜に折り曲げることから、延伸性や強度のある樹脂フィルムを用いるのが望ましい。   The material of the nonmagnetic sheet member 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.

（２）本発明の組み立て方法は、ループ状の磁性ブロックを径方向に複数個積層して構成され、各磁性ブロックは、複数の磁性帯板を径方向に積層するとともに、各磁性帯板の両先端間に形成されるカット部分の位置をずらして形成される巻鉄心の組み立て方法であって、前記磁性帯板の両先端の間隔を前記カット部分の間隔よりも大きく開いた状態で、両先端の間に非磁性のシート部材を配置し、次いで、前記両先端を接近させて突き合わせることで前記磁性帯板の両端の形状に沿うように前記シート部材を押し込むようにすることで、前記カット部分に非磁性シートを連続した状態で配置し、前記非磁性シートは、径方向に隣接する前記磁性ブロック間で折り返して、その隣接する磁性ブロックの前記カット部分でも連続した状態で配置し、前記複数の磁性ブロックの外周から内周に渡るように形成する。 (2) The assembly method of the present invention is configured by laminating a plurality of loop-shaped magnetic blocks in the radial direction, and each magnetic block is constructed by laminating a plurality of magnetic strips in the radial direction. A method of assembling a wound iron core formed by shifting the position of a cut part formed between both ends, wherein both ends of the magnetic strip are opened larger than the interval between the cut parts. By disposing a non-magnetic sheet member between the leading ends, and then pushing the sheet member along the shape of both ends of the magnetic band plate by bringing the two distal ends closer together and abutting each other , A non-magnetic sheet is continuously arranged in a cut portion, and the non-magnetic sheet is folded between the magnetic blocks adjacent in the radial direction and arranged in a state where the cut portion of the adjacent magnetic block is also continuous. It is formed so as to cross from the outer circumference to the inner circumference of the plurality of magnetic blocks.

本発明では、磁性帯板の両端面間のカット部分に連続して非磁性シート部材を配置することから、鉄心における磁性体の存在比率の低下を抑制し、小型化・軽量化を図りつつ励磁突入電流を低減することができる。   In the present invention, the non-magnetic sheet member is continuously arranged in the cut portion between the both end faces of the magnetic strip, so that the decrease in the ratio of the magnetic substance in the iron core is suppressed, and excitation is achieved while reducing the size and weight. Inrush current can be reduced.

従来例を示す図である。It is a figure which shows a prior art example. 本発明の好適な一実施形態を示す平面図である。It is a top view which shows suitable one Embodiment of this invention. その要部拡大断面図である。It is the principal part expanded sectional view. 組み立て方法の一実施形態を示す図である。It is a figure which shows one Embodiment of the assembly method. 本発明の別の実施形態を示す図である。It is a figure which shows another embodiment of this invention.

図２は、本発明に係る鉄心の一実施形態を示す平面図であり、図３は、カット部分付近の拡大断面図である。図に示すように、巻鉄心１０は、ループ状に形成された複数の磁性ブロック１１を径方向に積層して構成される。このループ状の形状は、本実施形態では、平面が略直方形で４角が円弧状としている。つまり、長辺を構成する平行に配置された一対の第１直線部１１ａと、短辺を構成する一対の第２直線部１１ｂ，１１ｃと、それら両直線部の隣接する端部同士を接続する曲線部１１ｄとを有する。この巻鉄心１０を用いて変圧器を構成する場合、第１直線部１１ａの周囲にコイル２０が装着される。   FIG. 2 is a plan view showing an embodiment of the iron core according to the present invention, and FIG. 3 is an enlarged cross-sectional view in the vicinity of a cut portion. As shown in the figure, the wound core 10 is configured by laminating a plurality of magnetic blocks 11 formed in a loop shape in the radial direction. In this embodiment, the loop shape is a substantially rectangular plane and four arcs. In other words, the pair of first straight portions 11a arranged in parallel constituting the long side, the pair of second straight portions 11b and 11c constituting the short side, and the adjacent ends of the two straight portions are connected to each other. And a curved portion 11d. When a transformer is configured using the wound core 10, the coil 20 is mounted around the first straight portion 11 a.

図３に拡大して示すように、磁性ブロック１１は、複数枚の帯板状の方向性珪素鋼板１２を径方向に積層して構成される。そして巻鉄心１０は、カット方式（ワンターンカット）であり、各方向性珪素鋼板１２は、略Ｃ字状に曲げられ、その両端が近接させることで、ループ状となる。その近接する一枚の方向性珪素鋼板１２の両端は、近接するが一定の隙間をおいたカット部分１３が形成される。方向性珪素鋼板１２内を流れる磁束は、一端から出て、そのカット部分１３を通って、隣接する同一の方向性珪素鋼板１２の他端に入る。   As shown in an enlarged view in FIG. 3, the magnetic block 11 is configured by laminating a plurality of strip-shaped directional silicon steel plates 12 in the radial direction. The wound iron core 10 is a cut method (one-turn cut), and each directional silicon steel sheet 12 is bent into a substantially C shape, and its both ends are brought into a loop shape. Cut portions 13 that are close to each other but have a certain gap are formed at both ends of the adjacent directional silicon steel plate 12. The magnetic flux flowing in the directional silicon steel plate 12 exits from one end, passes through the cut portion 13 and enters the other end of the same directional silicon steel plate 12 adjacent thereto.

さらに、このカット部分１３の形成位置は、階段状にずらし、同一の磁性ブロック１１を構成する方向性珪素鋼板１２のカット部分１３は、重ならないようにしている。また、巻鉄心１０を構成する全ての方向性珪素鋼板１２のカット部分１３が重ならないように徐々にずらしても良いが、そのようにすると、カット部分１３が形成される領域が広くなるので、本実施形態では、各磁性ブロック１１におけるカット部分１３が形成される領域であるカット部分形成領域１５は、一方の第２直線部１１ｃの同じ箇所に設定している。これにより、カット部分１３は、径方向に見た場合、階段状にずらしているものの、各磁性ブロック１１で折り返されて繰り返される状態となる。   Further, the formation position of the cut portion 13 is shifted stepwise so that the cut portions 13 of the directional silicon steel plates 12 constituting the same magnetic block 11 do not overlap. Moreover, although it may be gradually shifted so that the cut portions 13 of all the directional silicon steel plates 12 constituting the wound iron core 10 do not overlap with each other, the area where the cut portions 13 are formed becomes wider. In the present embodiment, the cut portion forming region 15, which is a region where the cut portion 13 in each magnetic block 11 is formed, is set at the same location on one second linear portion 11 c. Thereby, although the cut part 13 is shifted stepwise when viewed in the radial direction, the cut part 13 is folded and repeated by each magnetic block 11.

また、図示省略するが、最外周の磁性ブロック１１のさらに外周にはスチールバンドが巻き付けられ、径方向（積層方向）内側に向けて締め付けられる。これにより、積層方向に隣接する磁性ブロック１１同士や、磁性ブロック１１を構成する積層方向に隣接する方向性珪素鋼板１２同士は、密着する。   Although not shown, a steel band is wound around the outer periphery of the outermost magnetic block 11 and tightened inward in the radial direction (stacking direction). Thereby, the magnetic blocks 11 adjacent to each other in the stacking direction and the directional silicon steel plates 12 adjacent to each other in the stacking direction constituting the magnetic block 11 are in close contact with each other.

ここで本発明では、図３に示すように、カット部分１３に連続した絶縁性・非磁性のシート部材１６を配置した。このシート部材１６は、薄い樹脂フィルムや、絶縁紙等の適宜折り曲げ等容易に変形できる材質のものを用いて構成できる。つまり、各磁性ブロック１１より具体的には方向性珪素鋼板１２の両端同士が対向する突き合わせ端面１２ａと、先端側の積層方向外面１２ｂと積層方向内面１２ｃ同士が対向する重ね部に、連続した状態でシート部材１６が配置される。   Here, in this invention, as shown in FIG. 3, the insulating and nonmagnetic sheet | seat member 16 which followed the cut part 13 was arrange | positioned. The sheet member 16 can be configured by using a thin resin film or a material that can be easily deformed, such as an insulating paper, as appropriate. That is, more specifically, each magnetic block 11 is continuously connected to the abutting end surface 12a where both ends of the directional silicon steel plate 12 face each other, and the overlapping portion where the stacking direction outer surface 12b and the stacking direction inner surface 12c face each other. Thus, the sheet member 16 is arranged.

これにより、隣接する方向性珪素鋼板１２のカット部分１３付近の方向性珪素鋼板１２の先端部同士の対向する表面間には、少なくともシート部材１６の膜厚のギャップが確保される。そして、方向性珪素鋼板１２の一方の端部から他方の端部へと流れる磁束は、その非磁性のシート部材１６を通過して移動することになる。   Thereby, at least the gap of the film thickness of the sheet member 16 is ensured between the opposing surfaces of the tip portions of the directional silicon steel plates 12 in the vicinity of the cut portions 13 of the adjacent directional silicon steel plates 12. The magnetic flux flowing from one end of the directional silicon steel plate 12 to the other end moves through the nonmagnetic sheet member 16.

つまり、図３に示すように、１つの磁性ブロック１１で見た場合、カット部分１３を階段状にずらすことから、各方向性珪素鋼板１２の先端部分は、その端面１２ａのみならず、積層方向外面１２ｂと積層方向内面１２ｃの少なくとも一方が露出する。その結果、カット部分１３で対向する方向性珪素鋼板１２の両先端同士は、その露出した積層方向外面１２ｂと積層方向内面１２ｃとが対向し、仮に非磁性シート部材１６を設けない場合には、係る対向する積層方向外面１２ｂと積層方向内面１２ｃとで接触されてしまい、周回方向で連続した磁路が形成されてしまう。つまり、カット部分１３の磁気抵抗が大きいので、本来カット部分１３を流れるべき磁束は、磁気抵抗の小さい積層方向に隣接する方向性珪素鋼板１２を迂回してしまう。そこで、本実施形態のように、カット部分１３付近で露出する表面に非磁性のシート部材１６を配置することで、シート部材１６が形成されたカット部分１３付近の領域では、当該シート部材１６が介在するので隣接する方向性珪素鋼板１２同士が接触して磁気的に導通する磁路は形成されずに、シート部材１６の厚み分だけギャップが形成される。よって、ある方向性珪素鋼板１２内を先端まで進んできた磁束は、同じ方向性珪素鋼板１２の他端に進むためには、カット部分１３の空間部分を通過するか、隣接する他の方向性珪素鋼板１２側を迂回しても最終的にシート部材１６により形成されるギャップを通過することになる。よって、磁束は、どの経路を通っても１周回る途中にギャップが確保され、ワンターンカットタイプとなり、残留磁束の低減を図れ、突入電流の低減が期待できる。   That is, as shown in FIG. 3, when viewed with one magnetic block 11, the cut portion 13 is shifted stepwise, so that the tip portion of each directional silicon steel plate 12 is not only the end surface 12 a but also the stacking direction. At least one of the outer surface 12b and the inner surface 12c in the stacking direction is exposed. As a result, both ends of the directional silicon steel plates 12 that face each other at the cut portion 13 are such that the exposed lamination direction outer surface 12b and the lamination direction inner surface 12c are opposed to each other, and if the nonmagnetic sheet member 16 is not provided, The opposing lamination direction outer surface 12b and the lamination direction inner surface 12c contact each other, and a continuous magnetic path is formed in the circumferential direction. That is, since the magnetic resistance of the cut portion 13 is large, the magnetic flux that should originally flow through the cut portion 13 bypasses the directional silicon steel plate 12 adjacent to the stacking direction where the magnetic resistance is small. Therefore, as in the present embodiment, by disposing the nonmagnetic sheet member 16 on the surface exposed in the vicinity of the cut portion 13, the sheet member 16 is formed in the region near the cut portion 13 where the sheet member 16 is formed. Since the intervening directional silicon steel plates 12 are in contact with each other and do not form a magnetic path that is magnetically conductive, a gap corresponding to the thickness of the sheet member 16 is formed. Therefore, in order for the magnetic flux that has traveled to the tip in a certain directional silicon steel plate 12 to pass to the other end of the same directional silicon steel plate 12, it passes through the space portion of the cut portion 13 or another adjacent directionality. Even if the silicon steel sheet 12 is detoured, it eventually passes through the gap formed by the sheet member 16. Therefore, a gap is secured in the course of one round of the magnetic flux passing through any path, and it becomes a one-turn cut type, so that the residual magnetic flux can be reduced and the inrush current can be expected to be reduced.

また、図から明らかなように、シート部材１６を配置するのは、カット部分形成領域１５のみとなり、それ以外の部分では、所定枚数の方向性珪素鋼板１２を積層した磁性ブロック１１である磁性体が存在することになる。よって、特許文献１に示すように、積層方向に隣接する磁性ブロック１１の表面全面に非磁性体を配置するものに比べて鉄心における単位断面積あたりの磁性体の量を大きくすることができる。その結果、小型化・軽量化が図れる。   Further, as is apparent from the drawing, the sheet member 16 is disposed only in the cut portion forming region 15, and in the other portions, a magnetic body that is a magnetic block 11 in which a predetermined number of directional silicon steel plates 12 are laminated. Will exist. 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 nonmagnetic material is disposed on the entire surface of the magnetic block 11 adjacent in the stacking direction. As a result, the size and weight can be reduced.

係る構成の鉄心は、以下に示す手順により構成することができる。まず、まず、通常、この種の巻鉄心は、図４に示すように、略Ｃ字状で、両端が開いた状態のものが製造される。この両端のラップ面が開いた状態の巻芯に対し、第１直線部１１ａにコイルを装着後、両先端を閉じて、対向する磁性ブロック１１（方向性珪素鋼板１２）同士が近接するように組み付けて所定間隔をおいたカット部分１３を構成する。   The iron core having such a configuration can be configured by the following procedure. First, usually, this type of wound iron core is generally C-shaped and has both ends opened as shown in FIG. With respect to the core in a state where the wrap surfaces at both ends are open, after the coil is mounted on the first linear portion 11a, both ends are closed so that the opposing magnetic blocks 11 (directional silicon steel plates 12) are close to each other. The cut portion 13 is assembled with a predetermined interval.

そこで、図４に示すように両端が開いた状態のものに対し、その両先端部分の間に、絶縁性・非磁性のシート部材１６を配置する。次いで、積層方向（径方向）内側或いは外側から順番に、そのシート部材１６を挟んで対向配置させた方向性珪素鋼板１２の先端を互いに突き合わせる。この挿入作業に伴い、シート部材１６は、方向性珪素鋼板１２（磁性ブロック１１）の端面形状に合わせて適宜折れ曲がり、カット部分１３の接合部（つなぎ部）間に連続した形状で配置されることになる。このように、非磁性体としてシート部材１６を用いたため、磁性ブロック１１の両端面の間にシート部材を垂れ下げた状態で配置し、所定の磁性ブロックを順次押し込むことで簡単に組み立てることができる。   Therefore, as shown in FIG. 4, an insulating / non-magnetic sheet member 16 is disposed between both ends of the sheet having both ends opened. Next, the ends of the directional silicon steel plates 12 arranged to face each other with the sheet member 16 sandwiched therebetween are sequentially abutted from the inner side or the outer side in the stacking direction (radial direction). Along with this insertion work, the sheet member 16 is appropriately bent in accordance with the end face shape of the directional silicon steel plate 12 (magnetic block 11), and is arranged in a continuous shape between the joint portions (connecting portions) of the cut portions 13. become. As described above, since the sheet member 16 is used as the non-magnetic material, the sheet member can be arranged in a state where it is suspended between the both end surfaces of the magnetic block 11 and can be easily assembled by sequentially pushing the predetermined magnetic block. .

図５は、別の実施形態を示している。本実施形態では、三相用の巻鉄心に適用した例を示している。すなわち、三相用であるので、２つの内鉄心２１，２１を横に並べると共に、その２つの内鉄心２１の外周を覆うように外鉄心２２を配置している。   FIG. 5 shows another embodiment. In this embodiment, the example applied to the wound iron core for three phases is shown. That is, since it is for three phases, the two inner iron cores 21 and 21 are arranged side by side, and the outer iron core 22 is arranged so as to cover the outer periphery of the two inner iron cores 21.

そして、内鉄心２１並びに外鉄心２２には、それぞれ階段状にずらしたカット部分２３が形成されて、ワンターンカットタイプの巻鉄心が構成される。そして、このカット部分１３の形成される領域において、上記の実施形態と同様に、カット部分１３間にシート部材１６を介在させる。   The inner iron core 21 and the outer iron core 22 are respectively formed with cut portions 23 that are staggered to form a one-turn cut type wound iron core. And in the area | region where this cut part 13 is formed, the sheet | seat member 16 is interposed between the cut parts 13 similarly to said embodiment.

１０ 巻鉄心
１１ 磁性ブロック
１２ 方向性珪素鋼板
１３ カット部分
１６ シート部材 DESCRIPTION OF SYMBOLS 10 Iron core 11 Magnetic block 12 Directional silicon steel sheet 13 Cut part 16 Sheet member

Claims (2)

ループ状の磁性ブロックを径方向に複数個積層して構成され、各磁性ブロックは、複数の磁性帯板を径方向に積層するとともに、各磁性帯板の両先端間に形成されるカット部分の位置をずらして形成される巻鉄心であって、
前記カット部分に非磁性シートを連続した状態で配置し、
前記非磁性シートは、径方向に隣接する前記磁性ブロック間で折り返して、その隣接する磁性ブロックの前記カット部分でも連続した状態で配置し、前記複数の磁性ブロックの外周から内周に渡るように構成したことを特徴とする巻鉄心。 A plurality of loop-shaped magnetic blocks are laminated in the radial direction, and each magnetic block is formed by laminating a plurality of magnetic strips in the radial direction and a cut portion formed between both ends of each magnetic strip. A wound core formed by shifting the position,
A non-magnetic sheet is continuously arranged in the cut part ,
The non-magnetic sheet is folded between the magnetic blocks adjacent in the radial direction, arranged in a continuous state in the cut portions of the adjacent magnetic blocks, and extends from the outer periphery to the inner periphery of the plurality of magnetic blocks. wound core, characterized in that the configuration was. ループ状の磁性ブロックを径方向に複数個積層して構成され、各磁性ブロックは、複数の磁性帯板を径方向に積層するとともに、各磁性帯板の両先端間に形成されるカット部分の位置をずらして形成される巻鉄心の組み立て方法であって、
前記磁性帯板の両先端の間隔を前記カット部分の間隔よりも大きく開いた状態で、両先端の間に非磁性のシート部材を配置し、
次いで、前記両先端を接近させて突き合わせることで前記磁性帯板の両端の形状に沿うように前記シート部材を押し込むようにすることで、
前記カット部分に非磁性シートを連続した状態で配置し、
前記非磁性シートは、径方向に隣接する前記磁性ブロック間で折り返して、その隣接する磁性ブロックの前記カット部分でも連続した状態で配置し、前記複数の磁性ブロックの外周から内周に渡るように形成することを特徴とする巻鉄心の組み立て方法。 A plurality of loop-shaped magnetic blocks are laminated in the radial direction, and each magnetic block is formed by laminating a plurality of magnetic strips in the radial direction and a cut portion formed between both ends of each magnetic strip. A method of assembling a wound core formed by shifting the position,
In a state where the interval between both ends of the magnetic strip is larger than the interval between the cut portions, a non-magnetic sheet member is disposed between both ends,
Next, by pushing the sheet member so as to follow the shape of both ends of the magnetic band plate by approaching and abutting both ends ,
A non-magnetic sheet is continuously arranged in the cut part,
The non-magnetic sheet is folded between the magnetic blocks adjacent in the radial direction, arranged in a continuous state in the cut portions of the adjacent magnetic blocks, and extends from the outer periphery to the inner periphery of the plurality of magnetic blocks. A method of assembling a wound iron core characterized by forming .
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