JP6466728B2 - Transformer and manufacturing method thereof - Google Patents

Transformer and manufacturing method thereof Download PDF

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JP6466728B2
JP6466728B2 JP2015023483A JP2015023483A JP6466728B2 JP 6466728 B2 JP6466728 B2 JP 6466728B2 JP 2015023483 A JP2015023483 A JP 2015023483A JP 2015023483 A JP2015023483 A JP 2015023483A JP 6466728 B2 JP6466728 B2 JP 6466728B2
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electromagnetic steel
steel sheet
iron core
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turn cut
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JP2016146441A (en
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学 土肥
学 土肥
和宏 宮島
和宏 宮島
諒介 御子柴
諒介 御子柴
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Hitachi Industrial Equipment Systems Co Ltd
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本発明は、変圧器に関し、特に変圧器の鉄心の構造と製造方法に関するものである。   The present invention relates to a transformer, and more particularly to a structure and a manufacturing method of an iron core of a transformer.

変圧器の中身は、鉄心とコイルと絶縁材を用いて組立てられている。変圧器に用いる鉄心構造としては、電磁鋼板を短冊形に切断したものを積重ねて締付けた積鉄心形と、電磁鋼板を巻回して成形した巻鉄心形に大別される。   The contents of the transformer are assembled using an iron core, a coil, and an insulating material. The iron core structure used for the transformer is roughly classified into a stacked iron core shape obtained by stacking and tightening electromagnetic steel sheets cut into strips, and a wound iron core shape formed by winding electromagnetic steel sheets.

巻鉄心形の鉄心構造を用いて成形した鉄心を巻鉄心と呼び、巻鉄心は製造方法に依りノーカット方式、カット方式、ラップ方式の３方式がある。これらの巻鉄心をコイルと組合せる場合、ノーカット方式は巻鉄心に導体を巻回してコイルを成形する。カット方式、ラップ方式はいずれも予め用意されたコイルに巻鉄心を組込む方式であり、カット方式は固着された巻鉄心を２箇所切断し、コイルへ組込み後接着する方式、ラップ方式は電磁鋼板の切断箇所を互いにずらして巻鉄心を成形後、コイルに組み込む方式である。
ラップ方式は固着や接着作業が不要で機械的にも安定し、大形機にも適用できる為、多くの変圧器で採用されている。 An iron core formed by using a wound core type core structure is called a wound core, and there are three types of wound cores, a no-cut method, a cut method, and a wrap method, depending on the manufacturing method. When these wound iron cores are combined with a coil, the no-cut method forms a coil by winding a conductor around the wound iron core. Both the cutting method and the wrapping method are a method of incorporating a wound iron core into a coil prepared in advance. The cutting method is a method of cutting two fixed iron cores and attaching them to the coil and then bonding them. In this method, the cut portions are shifted from each other and the wound iron core is formed and then incorporated into the coil.
The wrapping method is used in many transformers because it does not require fixing or bonding work, is mechanically stable, and can be applied to large machines.

本明細書では、ラップ方式のうち、コの字形に成形した電磁鋼板を用いて巻鉄心を形成する方式をコの字形方式と呼ぶ。   In this specification, among the wrapping methods, a method of forming a wound iron core using an electromagnetic steel sheet formed into a U-shape is referred to as a U-shape method.

ラップ方式で製造する巻鉄心形変圧器の一例として、特許文献１には、「珪素鋼板製の巻鉄心を用いた巻鉄心変圧器において、前記巻鉄心は、ワンターンカット形の継目部分を有する内側巻鉄心と、この内側巻鉄心の外周に配置され、２つの脚部に傾斜面の継目部分を有する外側巻鉄心と、から構成されていることを特徴とする巻鉄心変圧器。（請求項１）」が開示されている。   As an example of a wound iron core type transformer manufactured by a wrap method, Patent Document 1 describes, “In a wound iron core transformer using a wound iron core made of silicon steel plate, the wound iron core has a one-turn cut type seam portion. A wound core transformer comprising: a wound iron core; and an outer wound iron core disposed on the outer periphery of the inner wound iron core and having a joint portion of an inclined surface at two legs. ) "Is disclosed.

特開２００１−２８４１３６号公報JP 2001-284136 A

変圧器に用いる巻鉄心に於いて、ラップ方式は、コイル間口に、成形した電磁鋼板を幾度かに分けて挿入していく。電磁鋼板を挿入していくにつれ、コイルと、コイル間口に挿入後の電磁鋼板とのギャップが、徐々に狭くなる。ラップ方式のうちワンターンカット方式では、狭いギャップに、成形した電磁鋼板の挿入が困難であり、無理に挿入すると電磁鋼板がコイル内側の絶縁を傷つけ、絶縁破壊につながる危険性がある。   In a wound iron core used for a transformer, the wrapping method inserts a formed electromagnetic steel sheet into a coil opening several times. As the electromagnetic steel sheet is inserted, the gap between the coil and the electromagnetic steel sheet after being inserted into the coil opening gradually narrows. Among the wrap methods, the one-turn cut method makes it difficult to insert the formed electrical steel sheet into a narrow gap. If it is inserted forcibly, the electrical steel sheet may damage the insulation inside the coil, leading to a risk of dielectric breakdown.

一方、コの字形方式の電磁鋼板は、コイル間口に成形した電磁鋼板を挿入する際、コイル間口には電磁鋼板の直線部分が挿入される為、コイルと、コイル間口に挿入後の電磁鋼板とのギャップが狭くなることに依る絶縁破壊の危険性は減少する。しかし、コの字形方式の電磁鋼板脚部を対になるコの字形方式の電磁鋼板脚部とラップさせる為、ラップ箇所がワンターンカット方式の１箇所に対し、コの字形方式では２箇所になり鉄損が悪化する。更に、コの字形方式の電磁鋼板ラップ部分は、コイルで隠れて視認できず、ギャップ管理が困難になるというデメリットがある。   On the other hand, when the electromagnetic steel sheet formed in the coil opening is inserted into the U-shaped electromagnetic steel sheet, the linear part of the electromagnetic steel sheet is inserted into the coil opening. The risk of dielectric breakdown due to narrowing of the gap is reduced. However, since the U-shaped electromagnetic steel plate legs are wrapped with the pair of U-shaped electromagnetic steel plate legs, the number of laps is one in the one-turn cut method, but there are two in the U-shaped method. Iron loss worsens. Furthermore, the U-shaped electromagnetic steel sheet wrap portion is hidden by a coil and cannot be visually recognized, and there is a demerit that gap management becomes difficult.

特許文献１には、ワンターンカット形の継目部分を有する内側巻鉄心と、この内側巻鉄心の外周に配置され、２つの脚部に傾斜面の継目部分を有する外側巻鉄心と、から構成されている巻鉄心変圧器が開示されているが、特許文献１記載の巻鉄心変圧器は、位置決め用鉄心枠の機能をワンターンカット形の内側巻鉄心で兼ねさせて、巻鉄心の大型化を防止するもので、ワンターンカット方式の利点とコの字形方式の利点を共に備えるものではない。   Patent Document 1 is composed of an inner wound core having a one-turn cut type seam portion, and an outer wound core disposed on the outer periphery of the inner wound core and having an inclined surface joint portion on two legs. However, the wound core transformer disclosed in Patent Document 1 has the function of the positioning core frame combined with the one-turn cut inner wound core to prevent an increase in the size of the wound core. However, it does not have both the advantages of the one-turn cut method and the U-shaped method.

本発明は、ラップ方式の巻鉄心に於いて、コイル間口でのギャップが狭くなっても電磁鋼板の挿入作業を可能とし、電磁鋼板の変形を無くするとともに、ラップ箇所を少なくし、鉄損悪化を低減できる変圧器を提供することを目的とする。   The present invention enables a magnetic steel sheet to be inserted even when the gap at the coil opening is narrowed in a wrap-type wound iron core, eliminates deformation of the magnetic steel sheet, reduces the number of lap locations, and deteriorates iron loss. An object of the present invention is to provide a transformer that can reduce power consumption.

本発明は上記課題を解決する為に、ラップ方式の巻鉄心を備える変圧器に於いて、ワンターンカット方式の電磁鋼板を内側に配し、コの字形方式の電磁鋼板を外側に配してコイルに組込むものである。   In order to solve the above-mentioned problems, the present invention provides a coil having a one-turn cut type electromagnetic steel sheet arranged inside and a U-shaped type electromagnetic steel sheet arranged outside in a transformer having a wrap type wound core. It is to be incorporated into.

本発明の代表的な「変圧器」の一例を挙げるならば、コイルと、ラップ方式の巻鉄心を備える変圧器であって、前記巻鉄心は、内側に配したワンターンカット方式の電磁鋼板で形成される内側鉄心と、外側に配したコの字形方式の電磁鋼板で形成される外側鉄心とを備え、前記ワンターンカット方式の電磁鋼板の積層厚さが、前記コの字形方式の電磁鋼板の積層厚さよりも厚いことを特徴とするものである。   An example of a typical “transformer” of the present invention is a transformer including a coil and a wrap type wound core, and the wound core is formed of a one-turn cut type electromagnetic steel sheet disposed inside. An inner iron core that is formed and an outer iron core that is formed of a U-shaped electromagnetic steel sheet disposed on the outer side, and the lamination thickness of the one-turn cut type electromagnetic steel sheet is equal to that of the U-shaped electromagnetic steel sheet. It is characterized by being thicker than the thickness.

また、本発明の代表的な「変圧器の製造方法」の一例を挙げるならば、コイルと、ラップ方式の巻鉄心を備える変圧器の製造方法であって、前記コイルの間口に、ワンターンカット方式の電磁鋼板を順次挿入して、内側鉄心を形成する工程と、前記内側鉄心と前記コイルとのギャップに、コの字形方式の電磁鋼板を挿入して外側鉄心を形成する工程とを備え、前記ワンターンカット方式の電磁鋼板の積層厚さが、前記コの字形方式の電磁鋼板の積層厚さよりも厚いことを特徴とするものである。   In addition, if one example of a typical “method for manufacturing a transformer” of the present invention is given, it is a method for manufacturing a transformer including a coil and a wrap-type wound iron core, and a one-turn cut method is provided at the opening of the coil. Sequentially inserting the electromagnetic steel sheets to form an inner iron core, and inserting a U-shaped electromagnetic steel sheet into a gap between the inner iron core and the coil to form an outer iron core, The laminated thickness of the one-turn cut type electromagnetic steel sheet is thicker than the laminated thickness of the U-shaped electromagnetic steel sheet.

本発明によれば、ラップ方式の巻鉄心に於いて、内側にワンターンカット方式の電磁鋼板を配し、外側にコの字形方式の電磁鋼板を配する組合せにすることで、コイルと、コイル間口に挿入後の電磁鋼板とのギャップが徐々に狭くなっても、挿入作業が可能になる。また、巻鉄心を全てコの字形方式を用いてコイルに組込むより、ラップ箇所を少なくできる為、鉄損悪化を低減できる。   According to the present invention, in a wrap type wound core, a combination of a one-turn cut type electromagnetic steel sheet on the inside and a U-shaped type electromagnetic steel sheet on the outside, Even if the gap with the magnetic steel sheet after the insertion is gradually reduced, the insertion operation can be performed. In addition, since all the wound iron cores are incorporated into the coil using the U-shaped method, the number of wraps can be reduced, so that the deterioration of iron loss can be reduced.

その結果、コイル間口の幅を広く取り、電磁鋼板挿入作業のスペース確保を行う必要が無い為、変圧器の中身の小型化が可能となる。   As a result, it is not necessary to increase the width of the coil opening and secure the space for inserting the electromagnetic steel sheet, so that the size of the transformer can be reduced.

本発明の実施例１の巻鉄心の構造を示す概略図である。It is the schematic which shows the structure of the wound iron core of Example 1 of this invention. 本発明の実施例１の変圧器の構造を示す図である。It is a figure which shows the structure of the transformer of Example 1 of this invention. 本発明の実施例の、ワンターンカット方式とコの字形方式の電磁鋼板を用いた巻鉄心の製造方法を示す図である。It is a figure which shows the manufacturing method of the wound iron core using the electromagnetic steel plate of the one turn cut system and the U-shaped system of the Example of this invention. 本発明の実施例の、ワンターンカット方式とコの字形方式の電磁鋼板を用いた巻鉄心の製造方法を示す図である。It is a figure which shows the manufacturing method of the wound iron core using the electromagnetic steel plate of the one turn cut system and the U-shaped system of the Example of this invention. 本発明の実施例２の巻鉄心の構造を示す概略図である。It is the schematic which shows the structure of the wound iron core of Example 2 of this invention. 本発明の実施例３の巻鉄心の構造を示す概略図である。It is the schematic which shows the structure of the wound iron core of Example 3 of this invention. 本発明の実施例４の巻鉄心の構造を示す概略図である。It is the schematic which shows the structure of the wound iron core of Example 4 of this invention. 変圧器の中身構成を示す概略図である。It is the schematic which shows the content structure of a transformer. ワンターンカット方式の電磁鋼板を用いた巻鉄心の構造を示す概略図である。It is the schematic which shows the structure of the wound iron core using the electromagnetic steel plate of a one turn cut system. ワンターンカット方式の電磁鋼板を用いた巻鉄心の製造方法を示す図である。It is a figure which shows the manufacturing method of the wound iron core using the electromagnetic steel plate of a one turn cut system. ワンターンカット方式の電磁鋼板を用いた巻鉄心の製造方法を示す図である。It is a figure which shows the manufacturing method of the wound iron core using the electromagnetic steel plate of a one turn cut system. コの字形方式の電磁鋼板を用いた巻鉄心の構造を示す概略図である。It is the schematic which shows the structure of the wound iron core using the U-shaped electromagnetic steel plate.

本発明の実施の形態の説明に先立って、従来の変圧器の鉄心構造を説明する。
図７に変圧器中身構成の一例の概略図を示す。変圧器は、巻鉄心１０と、巻鉄心に巻回したコイル２０から構成されている。符号３０は、巻鉄心１０を外側から締め付けるバンドを示す。 Prior to the description of the embodiment of the present invention, a conventional iron core structure of a transformer will be described.
FIG. 7 shows a schematic diagram of an example of the configuration of the transformer. The transformer includes a wound iron core 10 and a coil 20 wound around the wound iron core. Reference numeral 30 denotes a band for fastening the wound core 10 from the outside.

図８にワンターンカット方式の電磁鋼板を用いた巻鉄心の構造を示し、図９Ａおよび図９Ｂに、ワンターンカット方式の電磁鋼板を用いた巻鉄心の製造方法を示す。図８において、符号１３はワンターンカット方式の電磁鋼板を表し、符号１３ａはワンターンカット方式の電磁鋼板のラップ部分を表す。ワンターンカット方式の電磁鋼板を積層して巻鉄心１０が形成されている。   FIG. 8 shows the structure of a wound core using a one-turn cut type electromagnetic steel sheet, and FIGS. 9A and 9B show a method of manufacturing a wound core using a one-turn cut type electromagnetic steel sheet. In FIG. 8, reference numeral 13 denotes a one-turn cut type electromagnetic steel sheet, and reference numeral 13a denotes a one-turn cut type electromagnetic steel sheet. The wound iron core 10 is formed by laminating one-turn cut type electromagnetic steel sheets.

図９Ａおよび図９Ｂに示すように、ラップ方式では、予め電磁鋼板の切断箇所を互いにずらして巻鉄心の形に成形し、コイル間口に、成形した電磁鋼板１３を形を調整しながら幾度かに分けて挿入していく。
電磁鋼板１３を挿入していくにつれ、コイル２０と、コイル間口に挿入後の電磁鋼板１３とのギャップ２５が、徐々に狭くなる。ラップ方式のうち、ワンターンカット方式では、狭いギャップ２５に、成形した電磁鋼板１３を挿入することが困難であり、無理に挿入すると電磁鋼板がコイル内側の絶縁を傷つけ、絶縁破壊につながる危険性がある。
更に、電磁鋼板１３が変形し、特性が悪化する恐れもある為、コイル間口の幅を広く取り、電磁鋼板挿入作業スペースを確保すると、変圧器中身の幅が大きくなってしまう。 As shown in FIG. 9A and FIG. 9B, in the lap method, the cut portions of the electromagnetic steel sheet are preliminarily shifted from each other and formed into the shape of a wound core, and the formed electromagnetic steel sheet 13 is adjusted several times while adjusting the shape at the coil opening. I will insert it separately.
As the electromagnetic steel sheet 13 is inserted, the gap 25 between the coil 20 and the electromagnetic steel sheet 13 after being inserted into the coil gap gradually decreases. Among the lapping methods, in the one-turn cut method, it is difficult to insert the formed electrical steel sheet 13 into the narrow gap 25. If it is forcibly inserted, the electrical steel sheet may damage the insulation inside the coil, leading to a risk of dielectric breakdown. is there.
Furthermore, since the electromagnetic steel sheet 13 may be deformed and the characteristics may be deteriorated, if the width of the coil opening is widened to secure a work space for inserting the electromagnetic steel sheet, the width of the transformer will be increased.

図１０に、コの字形方式の電磁鋼板を用いた巻鉄心を示す。コの字形方式の電磁鋼板１５は、コイル間口に成形した電磁鋼板を挿入する際、コイル間口に、電磁鋼板の直線部分が挿入される為、電磁鋼板の挿入が容易であり、また、コイル２０と、コイル間口に挿入後の電磁鋼板１５とのギャップが狭くなることに依る絶縁破壊の危険性は減少する。しかし、コの字形方式の電磁鋼板脚部を対になるコの字形に成形した電磁鋼板の脚部とラップさせる為、ラップ箇所１５ａがワンターンカット方式の１箇所に対し、コの字形方式では２箇所になり鉄損悪化を生じる。更に、コの字形方式の電磁鋼板ラップ部分１５ａは、コイル２０で隠れて見えず、ギャップ管理が困難であるというデメリットがある。   FIG. 10 shows a wound iron core using a U-shaped electromagnetic steel sheet. The U-shaped electromagnetic steel sheet 15 is easy to insert the electromagnetic steel sheet because the linear part of the electromagnetic steel sheet is inserted into the coil opening when the electromagnetic steel sheet formed in the coil opening is inserted. In addition, the risk of dielectric breakdown due to the narrow gap with the electromagnetic steel sheet 15 after being inserted into the coil opening is reduced. However, in order to wrap the U-shaped electromagnetic steel plate legs with the corresponding U-shaped electromagnetic steel plate legs, the wrap location 15a is 2 in the one-turn cut method and 2 in the U-shaped method. It becomes a place and iron loss worsens. Further, the U-shaped electromagnetic steel sheet wrap portion 15a is hidden by the coil 20 and is not visible, and there is a demerit that gap management is difficult.

本発明は、ラップ方式の巻鉄心に於いて、コイル間口でのギャップが狭くなっても電磁鋼板の挿入作業を可能とし、電磁鋼板の変形を無くするとともに、ラップ箇所を少なくし、鉄損悪化を低減できる変圧器を提供する。   The present invention enables a magnetic steel sheet to be inserted even when the gap at the coil opening is narrowed in a wrap-type wound iron core, eliminates deformation of the magnetic steel sheet, reduces the number of lap locations, and deteriorates iron loss. A transformer capable of reducing the voltage is provided.

以下、本発明の実施例を図面を用いて説明する。なお、実施例を説明するための各図において、同一の機能を有する要素には同一の名称、符号を付して、その繰り返しの説明を省略する。   Embodiments of the present invention will be described below with reference to the drawings. In each drawing for explaining the embodiment, elements having the same function are given the same name and reference numeral, and repeated explanation thereof is omitted.

図１は、本発明の実施例１の巻鉄心を示す概略図である。電磁鋼板等の磁性体で形成される巻鉄心１０の構成として、先ず内側にワンターンカット方式の電磁鋼板１３を配しラップ部１３ａで端部を接続して、内側鉄心１２を形成する。次にその外側にコの字形方式の電磁鋼板１５を配し２カ所のラップ部１５ａで電磁鋼板を接続して、外側鉄心１４を形成する。   FIG. 1 is a schematic view showing a wound iron core according to Example 1 of the present invention. As a configuration of the wound core 10 formed of a magnetic material such as an electromagnetic steel plate, first, an inner steel core 12 is formed by arranging a one-turn cut type electromagnetic steel plate 13 on the inner side and connecting ends with a lap portion 13a. Next, a U-shaped electromagnetic steel plate 15 is arranged on the outside, and the magnetic steel plates are connected by two lap portions 15a to form the outer iron core.

図２に、実施例１の変圧器を示し、図２（ａ）は巻鉄心を、図２（ｂ）はコイルを、図２（ｃ）は巻鉄心−コイル組立図を示す。それぞれの図において、下側の図は正面図であり、上側の図は上面図である。図２（ａ）に示すように巻鉄心１０は、内側のワンターンカット方式の電磁鋼板１３で形成した内側鉄心１２と、外側のコの字形方式の電磁鋼板１５で形成した外側鉄心１４とを組み合わせて構成されている。図２（ｂ）に示されるコイル２０は、巻き回された２つのコイルで構成されている。図２（ｃ）に示されるように、巻鉄心１０はコイル２０の間口に挿入されて、変圧器を構成する。   FIG. 2 shows the transformer of Example 1, FIG. 2 (a) shows the wound iron core, FIG. 2 (b) shows the coil, and FIG. 2 (c) shows the wound iron core-coil assembly drawing. In each figure, the lower figure is a front view, and the upper figure is a top view. As shown in FIG. 2 (a), the wound iron core 10 is a combination of an inner iron core 12 formed of an inner one-turn cut type electromagnetic steel sheet 13 and an outer iron core 14 formed of an outer U-shaped electromagnetic steel sheet 15. Configured. A coil 20 shown in FIG. 2B is composed of two wound coils. As shown in FIG. 2 (c), the wound core 10 is inserted into the gap of the coil 20 to constitute a transformer.

図３Ａおよび図３Ｂに、ワンターンカット方式とコの字形方式とを組み合わせた実施例の変圧器の製造方法を示す。図３Ａの（ａ）に示すように巻き回したコイル２０を準備し、（ｂ）に示すように一端を切り開いたワンターンカット方式の電磁鋼板１３をコイルの間口に挿入して取り付ける。（ｃ）に示すように電磁鋼板１３を順次挿入してラップ部１３ａで重ねて接合し、内側鉄心１２を形成する。次に、電磁鋼板１３とコイルとのギャップ部に、上下からコの字形方式の電磁鋼板１５を挿入し、図３Ｂの（ｅ）に示すようにラップ部分１５ａで重ねて接合して、外側鉄心１４を形成する。さらに（ｆ）に示すように、コの字形方式の電磁鋼板の外側にワンターンカット方式の電磁鋼板１９を１枚または数枚挿入し、変圧器を組み立てる（ｇ）。なお、（ｆ）の工程は、実施例３を示すもので、実施例１では必須のものではない。   FIG. 3A and FIG. 3B show a method of manufacturing a transformer according to an embodiment combining a one-turn cut method and a U-shaped method. A coil 20 wound as shown in FIG. 3A (a) is prepared, and a one-turn cut type electromagnetic steel sheet 13 with one end opened as shown in FIG. As shown in (c), the electromagnetic steel plates 13 are sequentially inserted and overlapped and joined at the lap portion 13a to form the inner iron core 12. Next, a U-shaped electromagnetic steel sheet 15 is inserted into the gap between the electromagnetic steel sheet 13 and the coil from above and below, and overlapped and joined at the wrap portion 15a as shown in FIG. 14 is formed. Further, as shown in (f), one or several one-turn cut type electromagnetic steel sheets 19 are inserted outside the U-shaped electromagnetic steel sheet to assemble a transformer (g). In addition, the process of (f) shows Example 3, and is not essential in Example 1.

本実施例に於いて、ワンターンカット方式の電磁鋼板１２の積層厚さ（内側鉄心の厚さ）をコの字形方式の電磁鋼板１５の積層厚さ（外側鉄心の厚さ）よりも厚くする。また、ワンターンカット方式の電磁鋼板１３の積層厚さ（内側鉄心の厚さ）を巻鉄心の全厚さの５割よりも厚く、より好ましくは８割以上とし、コの字形状方式の電磁鋼板１５の積層厚さ（外側鉄心の厚さ）を巻鉄心の全厚さの５割未満、より好ましくは２割未満とすればよい。
In this embodiment, the laminated thickness of the one-turn cut type electromagnetic steel sheet 12 (thickness of the inner iron core) is made thicker than the laminated thickness of the U-shaped electromagnetic steel sheet 15 (thickness of the outer iron core). The laminated thickness of the one-turn cut type electromagnetic steel sheet 13 (thickness of the inner iron core) is thicker than 50% of the total thickness of the wound iron core, more preferably 80% or more. The laminated thickness of 15 (thickness of the outer core) may be less than 50%, more preferably less than 20% of the total thickness of the wound core.

この構成に依り、コイルと、コイル間口に挿入後の電磁鋼板とのギャップが徐々に狭くなっても、巻鉄心外側では、コの字形方式の電磁鋼板の直線部分がコイル間口に挿入される為、ワンターンカット方式の電磁鋼板のみを使用するより、狭いギャップでの挿入作業が容易になり、電磁鋼板の変形の恐れが無く、コイル内側の絶縁破壊の危険性が減少する。また、ワンターンカット方式の積層厚さをコの字形方式の積層厚さよりも厚くする、或いは、ワンターンカット方式の電磁鋼板１３の積層厚さを巻鉄心の全厚さの５割よりも厚くすることにより、巻鉄心を全てコの字形方式で構成する場合に比べて、ラップ箇所を少なくできる為、鉄損悪化を低減することができる。 Because of this configuration, even if the gap between the coil and the magnetic steel sheet after insertion into the coil opening gradually narrows, the linear part of the U-shaped electromagnetic steel sheet is inserted into the coil opening outside the wound core. Compared with the use of the one-turn cut type electromagnetic steel sheet alone, the insertion work in a narrow gap becomes easier, there is no risk of deformation of the electromagnetic steel sheet, and the risk of dielectric breakdown inside the coil is reduced. Also, the one-turn cut type laminated thickness is made thicker than the U-shaped type laminated thickness, or the one-turn cut type electromagnetic steel sheet 13 is made thicker than 50 % of the total thickness of the wound core. Therefore, compared with the case where the wound iron core is entirely configured by a U-shaped system, the number of lap locations can be reduced, so that deterioration of iron loss can be reduced.

尚、本発明は上記した実施例に限定されるものではなく、さまざまな変形例が含まれる。上記実施例は本発明をわかりやすく詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。例えば、巻鉄心に使用する電磁鋼板の幅を２種類以上とし、階段状にする構造など、巻鉄心の内側にワンターンカット方式の電磁鋼板１３を配し、外側にコの字形状の電磁鋼板１５を配する構成であれば、電磁鋼板等の磁性体で形成される巻鉄心の形状は問わない。   In addition, this invention is not limited to an above-described Example, Various modifications are included. The above-described embodiments describe the present invention in detail in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. For example, a one-turn cut type electromagnetic steel sheet 13 is arranged on the inner side of the wound iron core, such as a structure in which two or more types of electromagnetic steel sheets used for the wound iron core are formed in a staircase shape. If it is the structure which arrange | positions, the shape of the wound iron core formed with magnetic bodies, such as an electromagnetic steel plate, does not ask | require.

図４に、本発明の実施例２の巻鉄心の概略図を示す。実施例１の構成に加えて、巻鉄心１０の最内周において、ワンターンカット方式の電磁鋼板１８を少なくとの１枚配し、電磁鋼板のラップ部分１８ａを、ワンターンカット方式の電磁鋼板１３のラップ部分１３ａとは反対側でラップする。この構成により、ワンターンカット方式の電磁鋼板１３のラップ部分１３ａが内側へ変形することを防ぐことができ、また、最内周に設けた電磁鋼板１８の端部を合わせることで鉄心内側のギャップ管理を容易にできる。   In FIG. 4, the schematic of the wound iron core of Example 2 of this invention is shown. In addition to the configuration of the first embodiment, at least one one-turn cut type electromagnetic steel plate 18 is arranged on the innermost circumference of the wound core 10, and the lap portion 18 a of the electromagnetic steel plate is placed on the one turn cut type electromagnetic steel plate 13. Wrap on the opposite side to the wrap portion 13a. With this configuration, the wrap portion 13a of the one-turn cut type electromagnetic steel sheet 13 can be prevented from being deformed inward, and the gap management inside the iron core can be achieved by matching the end portions of the electromagnetic steel sheet 18 provided on the innermost periphery. Can be easily done.

図５に、本発明の実施例３の巻鉄心の概略図を示す。実施例１の構成に加えて、巻鉄心１０の最外周において、ワンターンカット方式の電磁鋼板１９を少なくとも１枚配する。巻鉄心外側の電磁鋼板１９をワンターンカット方式とすることで、コの字形方式の電磁鋼板１５のラップ部分１５ａが外側に変形することを防ぐことができ、また、巻鉄心外側の電磁鋼板ラップ部分１９ａを視認することができる為、コの字形方式を使うデメリットであったギャップ管理が容易になる。   In FIG. 5, the schematic of the wound iron core of Example 3 of this invention is shown. In addition to the structure of the first embodiment, at least one one-turn cut type electromagnetic steel sheet 19 is disposed on the outermost periphery of the wound core 10. By adopting the one-turn cut method for the electromagnetic steel sheet 19 outside the wound core, the wrap portion 15a of the U-shaped electromagnetic steel sheet 15 can be prevented from being deformed outward, and the electromagnetic steel sheet wrap portion outside the wound core. Since 19a can be visually recognized, gap management, which is a disadvantage of using the U-shaped method, is facilitated.

図６に、本発明の実施例４の巻鉄心の概略図を示す。実施例４は、上記実施例１、実施例２、実施例３の構成を全て含んだ巻鉄心である。   In FIG. 6, the schematic of the wound iron core of Example 4 of this invention is shown. Example 4 is a wound iron core that includes all the configurations of Example 1, Example 2, and Example 3.

実施例１の構成に加えて、巻鉄心１０の最内周において、ワンターンカット方式の電磁鋼板１８を少なくとも１枚配し、電磁鋼板のラップ部分１８ａを、ワンターンカット方式の電磁鋼板１３のラップ部分１３ａとは反対側でラップする。また、巻鉄心１０の最外周において、ワンターンカット方式の電磁鋼板１９を少なくとも１枚配する。   In addition to the configuration of the first embodiment, at least one one-turn cut type electromagnetic steel plate 18 is arranged in the innermost circumference of the wound core 10, and a lap portion 18 a of the electromagnetic steel plate is used as a lap portion of the one turn cut type electromagnetic steel plate 13. Wrap on the opposite side to 13a. Further, at least one one-turn cut type electromagnetic steel sheet 19 is disposed on the outermost periphery of the wound iron core 10.

本実施例によれば、実施例１の効果に加えて、ワンターンカット方式の電磁鋼板１３のラップ部分１３ａが内側へ変形することを防ぐことができ、また、最内周に設けた電磁鋼板１８の端部を合わせることで鉄心内側のギャップ管理を容易にできる。また、巻鉄心外側の電磁鋼板１９をワンターンカット方式とすることで、コの字形方式の電磁鋼板１５のラップ部分１５ａが外側に変形することを防ぐことができ、また、巻鉄心外側の電磁鋼板ラップ部分１９ａを視認することができる為、コの字形方式を使うデメリットであったギャップ管理が容易になる。   According to the present embodiment, in addition to the effects of the first embodiment, the wrap portion 13a of the one-turn cut type electromagnetic steel sheet 13 can be prevented from being deformed inward, and the electromagnetic steel sheet 18 provided on the innermost periphery. The gap inside the core can be easily managed by aligning the ends of the cores. Moreover, by making the electromagnetic steel sheet 19 outside the wound iron core into a one-turn cut method, it is possible to prevent the wrap portion 15a of the U-shaped electromagnetic steel sheet 15 from being deformed to the outside, and the electromagnetic steel sheet outside the wound iron core. Since the lap portion 19a can be visually recognized, the gap management, which is a disadvantage of using the U-shaped method, is facilitated.

１０ 巻鉄心
１２ 内側鉄心
１３ ワンターンカット方式の電磁鋼板
１３ａ ワンターンカット方式の電磁鋼板のラップ部分
１４ 外側鉄心
１５ コの字形方式の電磁鋼板
１５ａ コの字形方式の電磁鋼板のラップ部分
１８ 巻鉄心の最内周に配したワンターンカット方式の電磁鋼板
１８ａ 巻鉄心の最内周に配したワンターンカット方式の電磁鋼板のラップ部分
１９ 巻鉄心の最外周に配したワンターンカット方式の電磁鋼板
１９ａ 巻鉄心の最外周に配したワンターンカット方式の電磁鋼板のラップ部分
２０ コイル
２５ コイルと、コイル間口に挿入後の電磁鋼板とのギャップ
３０ バンド 10 Iron core 12 Inner iron core 13 One-turn cut type magnetic steel sheet 13a One-turn cut type magnetic steel sheet wrap part 14 Outer iron core 15 U-shaped electromagnetic steel sheet 15a U-shaped magnetic steel sheet wrap part 18 One-turn cut type electromagnetic steel sheet 18a arranged on the inner circumference Lapping part 19 of a one-turn cut type electromagnetic steel sheet arranged on the innermost circumference of the wound core 19 One-turn cut type electromagnetic steel sheet 19a arranged on the outermost circumference of the wound core Lap portion 20 of a one-turn cut type electromagnetic steel sheet disposed on the outer periphery 20 Coil 25 A gap between the coil and the electromagnetic steel sheet after being inserted into the coil opening 30 band

Claims (4)

コイルと、ラップ方式の巻鉄心を備える変圧器であって、
前記巻鉄心は、内側に配したワンターンカット方式の電磁鋼板で形成される内側鉄心と、外側に配したコの字形方式の電磁鋼板で形成される外側鉄心とを備え、
前記ワンターンカット方式の電磁鋼板の積層厚さが、前記コの字形方式の電磁鋼板の積層厚さよりも厚く、
前記巻鉄心は、最内周にワンターンカット方式の電磁鋼板を少なくとも１枚備え、当該最内周のワンターンカット方式の電磁鋼板のラップ部分を、前記内側に配したワンターンカット方式の電磁鋼板のラップ部分とは反対側に配置したことを特徴とする変圧器。 A transformer comprising a coil and a wrap-type wound core;
The wound iron core includes an inner iron core formed of a one-turn cut type electromagnetic steel sheet disposed inside, and an outer iron core formed of a U-shaped electromagnetic steel sheet disposed outside,
The laminated thickness of the one-turn cut type electromagnetic steel sheet is thicker than the laminated thickness of the U-shaped electromagnetic steel sheet,
The wound iron core is provided with at least one one-turn cut type electromagnetic steel sheet on the innermost circumference, and a one-turn cut type electromagnetic steel sheet wrap provided with a lap portion of the innermost one-turn cut type electromagnetic steel sheet on the inner side. A transformer characterized by being arranged on the opposite side of the part. コイルと、ラップ方式の巻鉄心を備える変圧器であって、
前記巻鉄心は、内側に配したワンターンカット方式の電磁鋼板で形成される内側鉄心と、外側に配したコの字形方式の電磁鋼板で形成される外側鉄心とを備え、
前記ワンターンカット方式の電磁鋼板の積層厚さが、前記コの字形方式の電磁鋼板の積層厚さよりも厚く、
前記巻鉄心は、前記外側に配したコの字形方式の電磁鋼板の外側に、ワンターンカット方式の電磁鋼板を少なくとも１枚備えることを特徴とする変圧器。 A transformer comprising a coil and a wrap-type wound core;
The wound iron core includes an inner iron core formed of a one-turn cut type electromagnetic steel sheet disposed inside, and an outer iron core formed of a U-shaped electromagnetic steel sheet disposed outside,
The laminated thickness of the one-turn cut type electromagnetic steel sheet is thicker than the laminated thickness of the U-shaped electromagnetic steel sheet,
The wound iron core is provided with at least one one-turn cut type electromagnetic steel sheet on the outside of the U-shaped electromagnetic steel sheet disposed on the outside. コイルと、ラップ方式の巻鉄心を備える変圧器の製造方法であって、
前記コイルの間口に、ワンターンカット方式の電磁鋼板を順次挿入して、内側鉄心を形成する工程と、
前記内側鉄心と前記コイルとのギャップに、コの字形方式の電磁鋼板を挿入して外側鉄心を形成する工程とを備え、
前記ワンターンカット方式の電磁鋼板の積層厚さが、前記コの字形方式の電磁鋼板の積層厚さよりも厚いものであり、更に、
前記巻鉄心の最内周にワンターンカット方式の電磁鋼板を少なくとも１枚設け、当該最内周のワンターンカット方式の電磁鋼板のラップ部分を、前記内側鉄心の電磁鋼板のラップ部分とは反対側に配置する工程を備えることを特徴とする変圧器の製造方法。 A method of manufacturing a transformer comprising a coil and a wrap-type wound core,
A step of sequentially inserting a one-turn cut type electromagnetic steel sheet into the opening of the coil to form an inner iron core;
A step of inserting a U-shaped electromagnetic steel sheet into the gap between the inner iron core and the coil to form an outer iron core,
The laminated thickness of the one-turn cut type electromagnetic steel sheet is thicker than the laminated thickness of the U-shaped electromagnetic steel sheet ,
At least one one-turn cut type electromagnetic steel sheet is provided on the innermost circumference of the wound iron core, and the lap portion of the innermost one-turn cut type electromagnetic steel sheet is placed on the opposite side of the inner steel core from the lap portion of the electromagnetic steel sheet. The manufacturing method of the transformer characterized by including the process to arrange | position. コイルと、ラップ方式の巻鉄心を備える変圧器の製造方法であって、
前記コイルの間口に、ワンターンカット方式の電磁鋼板を順次挿入して、内側鉄心を形成する工程と、
前記内側鉄心と前記コイルとのギャップに、コの字形方式の電磁鋼板を挿入して外側鉄心を形成する工程とを備え、
前記ワンターンカット方式の電磁鋼板の積層厚さが、前記コの字形方式の電磁鋼板の積層厚さよりも厚いものであり、更に、
前記外側鉄心の電磁鋼板の外側に、ワンターンカット方式の電磁鋼板を少なくとも１枚設ける工程を備えることを特徴とする変圧器の製造方法。 A method of manufacturing a transformer comprising a coil and a wrap-type wound core,
A step of sequentially inserting a one-turn cut type electromagnetic steel sheet into the opening of the coil to form an inner iron core;
A step of inserting a U-shaped electromagnetic steel sheet into the gap between the inner iron core and the coil to form an outer iron core,
The laminated thickness of the one-turn cut type electromagnetic steel sheet is thicker than the laminated thickness of the U-shaped electromagnetic steel sheet ,
A method of manufacturing a transformer, comprising a step of providing at least one one-turn cut type electromagnetic steel sheet outside the electromagnetic steel sheet of the outer iron core.
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