JP2015192031A - Iron core for three-phase transformer - Google Patents

Iron core for three-phase transformer Download PDF

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JP2015192031A
JP2015192031A JP2014068334A JP2014068334A JP2015192031A JP 2015192031 A JP2015192031 A JP 2015192031A JP 2014068334 A JP2014068334 A JP 2014068334A JP 2014068334 A JP2014068334 A JP 2014068334A JP 2015192031 A JP2015192031 A JP 2015192031A
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leg
iron core
electromagnetic steel
legs
yoke
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亮岐 西村
Ryoki Nishimura
亮岐 西村
豪 西村
Takeshi Nishimura
豪 西村
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To reduce a power loss while suppressing heating of legs in an iron core.SOLUTION: The iron core includes a plurality of electromagnetic steel plates 113 and 114 for legs which are laminated to form the legs; and a plurality of electromagnetic steel plates 111 and 112 for yokes which are laminated to form yokes. In each of layers, junctions of the electromagnetic steel plate 113 for the leg and the electromagnetic sheet plates 111 and 112 for the yokes cross an arrangement direction of the legs and an extension direction of the legs and are positioned over a full width of the electromagnetic steel plate 113 for the leg in the arrangement direction of the legs and full widths of the electromagnetic steel plates 111 and 112 for the yokes in the extension direction of the legs. In the legs, the plurality of electromagnetic steel plates 113 and 114 for the legs are laminated while being deviated from each other in the arrangement direction of the legs, thereby forming ruggedness in the legs.

Description

本発明は、三相変圧器用鉄心に関し、特に、電力変圧器用の鉄心に関する。   The present invention relates to an iron core for a three-phase transformer, and more particularly to an iron core for a power transformer.

変圧器の積層鉄心の構成を開示した先行文献として、特開平６−５４５１号公報(特許文献１)がある。特許文献１に記載された変圧器の積層鉄心においては、横方向の継鉄部と縦方向の外側脚部の接合部の対角線と平行な接合位置を、継鉄部の長さ方向の両外側に複数枚の鋼板を順次３箇所以上ずらして接合して１ブロックとし、このブロックの複数個を順次繰り返して積層している。   Japanese Patent Laid-Open No. 6-5451 (Patent Document 1) is a prior document disclosing the structure of a laminated core of a transformer. In the laminated core of the transformer described in Patent Document 1, the joint positions parallel to the diagonal line of the joint portion of the transverse yoke portion and the longitudinal outer leg portion are arranged on both outer sides in the length direction of the yoke portion. A plurality of steel plates are sequentially shifted and joined at three or more locations to form one block, and a plurality of these blocks are sequentially stacked.

特開平６−５４５１号公報JP-A-6-5451

鉄心の脚部は、発熱して高温になることがある。また、脚部を構成する鋼板と、継鉄部を構成する鋼板との接合部が小さくなるに従って、接合部における電力損失が増加する。   The iron leg may generate heat and become hot. Moreover, the power loss in a junction part increases as the junction part of the steel plate which comprises a leg part, and the steel plate which comprises a yoke part becomes small.

本発明は上記の問題点に鑑みてなされたものであって、鉄心において脚部の発熱を抑制しつつ電力損失を低減できる、三相変圧器用鉄心を提供することを目的とする。   This invention is made | formed in view of said problem, Comprising: It aims at providing the iron core for three-phase transformers which can reduce an electric power loss, suppressing the heat_generation | fever of a leg part in an iron core.

本発明に基づく三相変圧器用鉄心は、互いに間隔を置いて並んで延在する３つの脚部、および、脚部の延在方向の端部同士を接続して閉磁路を構成する継鉄部を含む三相変圧器用鉄心である。三相変圧器用鉄心は、積層されて脚部を構成する複数の脚部用電磁鋼板と、積層されて継鉄部を構成する複数の継鉄部用電磁鋼板とを備える。各層において、脚部用電磁鋼板と継鉄部用電磁鋼板との接合部は、脚部の並ぶ方向および上記延在方向の各々と交差して、脚部の並ぶ方向における脚部用電磁鋼板の全幅、かつ、上記延在方向における継鉄部用電磁鋼板の全幅に亘って位置している。各脚部において、複数の脚部用電磁鋼板が、脚部の並ぶ方向に互いにずれて積層されていることにより、脚部に凹凸が形成されている。   An iron core for a three-phase transformer according to the present invention includes three leg portions extending side by side at intervals, and a yoke portion that constitutes a closed magnetic circuit by connecting ends in the extending direction of the leg portions. This is an iron core for a three-phase transformer including The iron core for a three-phase transformer includes a plurality of electromagnetic steel plates for legs that are stacked to form a leg portion, and a plurality of electromagnetic steel plates for a yoke portion that are stacked to configure a yoke portion. In each layer, the joint between the electrical steel sheet for leg portions and the electrical steel sheet for yoke portions intersects each of the direction in which the leg portions are aligned and the extending direction, and the electrical steel sheet for leg portions in the direction in which the leg portions are aligned. It is located over the entire width and the entire width of the electromagnetic steel sheet for a yoke part in the extending direction. In each leg, a plurality of leg steel sheets are laminated so as to deviate from each other in the direction in which the legs are arranged, whereby irregularities are formed in the legs.

本発明によれば、鉄心において脚部の発熱を抑制しつつ電力損失を低減できる。   According to the present invention, it is possible to reduce power loss while suppressing heat generation of the legs in the iron core.

三相変圧器の一例の構成を示す斜視図である。It is a perspective view which shows the structure of an example of a three-phase transformer. 比較形態１に係る鉄心を積層方向の一方側から見た図である。It is the figure which looked at the iron core which concerns on the comparison form 1 from the one side of the lamination direction. 図２の鉄心を矢印ＩＩＩ方向から見た図である。It is the figure which looked at the iron core of FIG. 2 from the arrow III direction. 図２の鉄心を矢印ＩＶ方向から見た図である。It is the figure which looked at the iron core of FIG. 2 from the arrow IV direction. 図２の鉄心をＶ−Ｖ線矢印方向から見た断面図である。It is sectional drawing which looked at the iron core of FIG. 2 from the VV arrow direction. 比較形態２に係る鉄心を積層方向の一方側から見た図である。It is the figure which looked at the iron core which concerns on the comparison form 2 from the one side of the lamination direction. 図６の鉄心を矢印ＶＩＩ方向から見た図である。It is the figure which looked at the iron core of FIG. 6 from the arrow VII direction. 図６の鉄心を矢印ＶＩＩＩ方向から見た図である。It is the figure which looked at the iron core of FIG. 6 from the arrow VIII direction. 図６の鉄心をＩＸ−ＩＸ線矢印方向から見た断面図である。It is sectional drawing which looked at the iron core of FIG. 6 from the IX-IX line arrow direction. 本発明の実施形態１に係る鉄心を積層方向の一方側から見た図である。It is the figure which looked at the iron core which concerns on Embodiment 1 of this invention from the one side of the lamination direction. 図１０の鉄心を矢印ＸＩ方向から見た図である。It is the figure which looked at the iron core of FIG. 10 from the arrow XI direction. 図１０の鉄心を矢印ＸＩＩ方向から見た図である。It is the figure which looked at the iron core of FIG. 10 from the arrow XII direction. 図１０の鉄心をＸＩＩＩ−ＸＩＩＩ線矢印方向から見た断面図である。It is sectional drawing which looked at the iron core of FIG. 10 from the XIII-XIII line arrow direction. 比較形態１，２に係る鉄心における磁束の流れを示す図である。It is a figure which shows the flow of the magnetic flux in the iron core which concerns on the comparison forms 1 and 2. FIG. 本発明の実施形態１に係る鉄心における磁束の流れを示す図である。It is a figure which shows the flow of the magnetic flux in the iron core which concerns on Embodiment 1 of this invention. 本発明の実施形態２に係る鉄心を積層方向の一方側から見た図である。It is the figure which looked at the iron core which concerns on Embodiment 2 of this invention from the one side of the lamination direction. 図１６の鉄心を矢印ＸＶＩＩ方向から見た図である。It is the figure which looked at the iron core of Drawing 16 from arrow XVII. 図１６の鉄心を矢印ＸＶＩＩＩ方向から見た図である。It is the figure which looked at the iron core of FIG. 16 from the arrow XVIII direction. 図１６の鉄心をＸＩＸ−ＸＩＸ線矢印方向から見た断面図である。It is sectional drawing which looked at the iron core of FIG. 16 from the XIX-XIX line arrow direction.

以下、本発明の各実施形態および比較形態に係る三相変圧器用鉄心について図面を参照して説明する。以下の実施形態および比較形態の説明においては、図中の同一または相当部分には同一符号を付して、その説明は繰り返さない。   Hereinafter, an iron core for a three-phase transformer according to each embodiment and a comparative embodiment of the present invention will be described with reference to the drawings. In the description of the following embodiments and comparative embodiments, the same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

まず、三相変圧器の一例について説明する。図１は、三相変圧器の一例の構成を示す斜視図である。図１に示す三相変圧器１００は、いわゆる内鉄形変圧器である。図１に示すように、三相変圧器１００は、鉄心１１０と、鉄心１１０の脚部に巻き回された巻線１２０とを含む。   First, an example of a three-phase transformer will be described. FIG. 1 is a perspective view showing a configuration of an example of a three-phase transformer. A three-phase transformer 100 shown in FIG. 1 is a so-called inner iron type transformer. As shown in FIG. 1, the three-phase transformer 100 includes an iron core 110 and a winding 120 wound around a leg portion of the iron core 110.

鉄心１１０は、互いに間隔を置いて並んで延在する３つの脚部、および、脚部の延在方向の端部同士を接続して閉磁路を構成する継鉄部を含む。脚部の並ぶ方向と脚部の延在方向とは、略直交している。   The iron core 110 includes three leg portions extending side by side at intervals, and a yoke portion that forms a closed magnetic circuit by connecting ends in the extending direction of the leg portions. The direction in which the legs are arranged and the extending direction of the legs are substantially orthogonal.

３つの脚部のうちの中央に位置する中央脚部は、複数の脚部用電磁鋼板１１４が積層されて構成されている。３つの脚部のうちの中央脚部以外の２つの外側脚部の各々は、複数の脚部用電磁鋼板１１３が積層されて構成されている。継鉄部は、複数の継鉄部用電磁鋼板１１１，１１２が積層されて構成されている。なお、図１においては、継鉄部用電磁鋼板１１１，１１２を１枚ずつのみ図示している。   The center leg part located in the center of the three leg parts is configured by laminating a plurality of leg-use electromagnetic steel plates 114. Each of the two outer legs other than the central leg of the three legs is configured by laminating a plurality of leg steel sheets 113. The yoke part is formed by laminating a plurality of yoke steel sheets 111 and 112. In FIG. 1, only one piece of the electromagnetic steel sheets 111 and 112 for the yoke part is shown.

以下、鉄心の構成について詳細に説明する。まず、比較形態１に係る鉄心の構成について説明する。   Hereinafter, the structure of the iron core will be described in detail. First, the structure of the iron core according to Comparative Example 1 will be described.

(比較形態１)
図２は、比較形態１に係る鉄心を積層方向の一方側から見た図である。図３は、図２の鉄心を矢印ＩＩＩ方向から見た図である。図４は、図２の鉄心を矢印ＩＶ方向から見た図である。図５は、図２の鉄心をＶ−Ｖ線矢印方向から見た断面図である。 (Comparative form 1)
FIG. 2 is a view of the iron core according to comparative embodiment 1 as viewed from one side in the stacking direction. FIG. 3 is a view of the iron core of FIG. 2 as viewed from the direction of arrow III. 4 is a view of the iron core of FIG. 2 as viewed from the direction of arrow IV. FIG. 5 is a cross-sectional view of the iron core of FIG. 2 as viewed from the direction of arrows VV.

図２〜５に示すように、比較形態１に係る鉄心１１０ａにおいては、中央脚部は、平行四辺形の外形を有する脚部用電磁鋼板１１４が交互に反転した状態で積層されることにより、構成されている。脚部用電磁鋼板１１４には、鉄心締めつけ用の孔１１４ｈが設けられている。   As shown in FIGS. 2 to 5, in the iron core 110 a according to the comparative example 1, the central leg is laminated in a state where the magnetic steel plates 114 for legs having a parallelogram outline are alternately inverted, It is configured. The leg magnetic steel sheet 114 is provided with a hole 114h for fastening the iron core.

外側脚部は、台形の外形を有する脚部用電磁鋼板１１３が脚部の延在方向において互いにずれて積層されることにより、構成されている。本比較形態においては、脚部用電磁鋼板１１３は、１層毎交互にずれて積層されている。脚部用電磁鋼板１１３には、鉄心締めつけ用の孔１１３ｈが設けられている。脚部用電磁鋼板１１３の積層後の孔１１３ｈの位置を揃えるために、孔１１３ｈの形成位置が互いに異なる２種類の脚部用電磁鋼板１１３が交互に積層されている。   The outer leg portion is configured by laminating the electromagnetic steel plate for leg portion 113 having a trapezoidal outer shape and deviating from each other in the extending direction of the leg portion. In this comparative form, the electromagnetic steel plates for legs 113 are laminated so as to be alternately shifted for each layer. The leg electromagnetic steel sheet 113 is provided with a hole 113h for fastening the iron core. In order to align the positions of the holes 113h after the lamination of the leg-use electromagnetic steel plates 113, two types of leg-use electromagnetic steel plates 113 having different formation positions of the holes 113h are alternately laminated.

本比較形態においては、３つの脚部の各々は、直方体状の外形を有している。すなわち、脚部に凹凸は形成されていない。   In this comparative form, each of the three legs has a rectangular parallelepiped outer shape. In other words, no irregularities are formed on the legs.

継鉄部は、台形の外形を有する継鉄部用電磁鋼板１１１，１１２が、交互に入れ替わって積層されることにより、構成されている。継鉄部用電磁鋼板１１１には、鉄心締めつけ用の孔１１１ｈが設けられている。継鉄部用電磁鋼板１１２には、鉄心締めつけ用の孔１１２ｈが設けられている。   The yoke part is formed by alternately switching and laminating electromagnetic steel plates 111 and 112 for a yoke part having a trapezoidal outer shape. The electromagnetic steel plate 111 for the yoke part is provided with a hole 111h for fastening the iron core. The yoke steel sheet 112 is provided with an iron core fastening hole 112h.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と交差している。本比較形態においては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と４５°の角度で交差している。   In each layer, the joint portion between the leg portion electromagnetic steel sheet 113 and the yoke portion electromagnetic steel sheets 111 and 112 intersects each of the direction in which the leg portions are aligned and the direction in which the leg portions extend. In this comparative embodiment, the joint portion between the leg portion electromagnetic steel sheet 113 and the yoke portion electromagnetic steel sheets 111 and 112 intersects each of the direction in which the leg portions are aligned and the direction in which the leg portions extend at an angle of 45 °. ing.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向における脚部用電磁鋼板１１３の全幅の一部に位置している。また、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の延在方向における継鉄部用電磁鋼板１１１，１１２の全幅の一部に位置している。   In each layer, the joint between the leg electromagnetic steel sheet 113 and the yoke magnetic steel sheets 111 and 112 is located at a part of the entire width of the leg electromagnetic steel sheet 113 in the direction in which the legs are arranged. In addition, the joint between the electromagnetic steel plate for leg portion 113 and the electromagnetic steel plate for yoke portion 111, 112 is located at a part of the entire width of the electromagnetic steel plate for yoke portion 111, 112 in the extending direction of the leg portion. .

すなわち、本比較形態においては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２とが接合していない非接合部３０，３１，４０，４１が形成されている。脚部用電磁鋼板１１３において非接合部３０となる部分は、鉄心１１０ａの外形において、脚部の延在方向に突出している。   That is, in this comparative form, the non-joining parts 30, 31, 40, 41 in which the leg steel sheet 113 and the yoke steel sheet 111, 112 are not joined are formed. The part which becomes the non-joining part 30 in the electromagnetic steel sheet 113 for the leg protrudes in the extending direction of the leg in the outer shape of the iron core 110a.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部の位置が層毎にずれていることにより、鉄心１１０ａの分解を防止する機能を有するオーバーラップ部２０が形成されている。   The position of the joint between the electromagnetic steel plate for legs 113 and the electromagnetic steel plates for yokes 111 and 112 is shifted from layer to layer, thereby forming an overlap portion 20 having a function of preventing decomposition of the iron core 110a. Yes.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部によって閉磁路が構成され、たとえば、図２に示すように主磁束１０が閉磁路を通過する。なお、主磁束１０が閉磁路を通過する方向は、逆でもよい。   A closed magnetic circuit is formed by the joint between the leg steel sheet 113 and the yoke steel sheet 111, 112. For example, as shown in FIG. 2, the main magnetic flux 10 passes through the closed circuit. The direction in which the main magnetic flux 10 passes through the closed magnetic path may be reversed.

次に、比較形態２に係る鉄心の構成について説明する。比較形態２に係る鉄心は、いわゆるステップラップ接合された鉄心である。   Next, the structure of the iron core according to Comparative Example 2 will be described. The iron core according to comparative form 2 is a so-called step lap joined iron core.

(比較形態２)
図６は、比較形態２に係る鉄心を積層方向の一方側から見た図である。図７は、図６の鉄心を矢印ＶＩＩ方向から見た図である。図８は、図６の鉄心を矢印ＶＩＩＩ方向から見た図である。図９は、図６の鉄心をＩＸ−ＩＸ線矢印方向から見た断面図である。 (Comparison 2)
FIG. 6 is a view of the iron core according to Comparative Example 2 as viewed from one side in the stacking direction. FIG. 7 is a view of the iron core of FIG. 6 as seen from the direction of arrow VII. FIG. 8 is a view of the iron core of FIG. 6 as viewed from the direction of arrow VIII. FIG. 9 is a cross-sectional view of the iron core of FIG. 6 as viewed from the direction of arrows IX-IX.

図６〜９に示すように、比較形態２に係る鉄心１１０ｂにおいては、中央脚部は、脚部の並ぶ方向の一方向に順次ずれて積層されている６角形の外形を有する脚部用電磁鋼板１１４からなる脚部用電磁鋼板群が繰り返し積層されることにより、構成されている。本比較形態においては、中央脚部における１つの脚部用電磁鋼板群は、６枚の脚部用電磁鋼板１１４からなる。   As shown in FIGS. 6 to 9, in the iron core 110 b according to the comparative example 2, the center leg portion has a hexagonal outer shape that is sequentially shifted and laminated in one direction in which the legs are arranged. It is configured by repeatedly laminating a group of electromagnetic steel plates for legs composed of steel plates 114. In this comparative embodiment, one leg magnetic steel sheet group in the central leg portion is composed of six leg magnetic steel sheets 114.

脚部用電磁鋼板１１４には、鉄心締めつけ用の孔１１４ｈが設けられている。脚部用電磁鋼板１１４の積層後の孔１１４ｈの位置を揃えるために、孔１１４ｈの形成位置が互いに異なる６種類の脚部用電磁鋼板１１４が順次ずれて積層されている。   The leg magnetic steel sheet 114 is provided with a hole 114h for fastening the iron core. In order to align the positions of the holes 114h after the lamination of the leg-use electromagnetic steel plates 114, the six types of leg-use electromagnetic steel plates 114 having different formation positions of the holes 114h are sequentially shifted and laminated.

外側脚部は、脚部の延在方向の一方向に順次ずれて積層されている台形の外形を有する脚部用電磁鋼板１１３からなる脚部用電磁鋼板群が繰り返し積層されることにより、構成されている。本比較形態においては、外側脚部における１つの脚部用電磁鋼板群は、６枚の脚部用電磁鋼板１１３からなる。   The outer leg portion is constituted by repeatedly laminating a group of leg-use electrical steel plates composed of leg-use electrical steel plates 113 having a trapezoidal outer shape that is sequentially shifted in one direction in the extending direction of the leg portions. Has been. In this comparative embodiment, one leg magnetic steel sheet group in the outer leg portion is composed of six leg magnetic steel sheets 113.

脚部用電磁鋼板１１３には、鉄心締めつけ用の孔１１３ｈが設けられている。脚部用電磁鋼板１１３の積層後の孔１１３ｈの位置を揃えるために、孔１１３ｈの形成位置が互いに異なる６種類の脚部用電磁鋼板１１３が順次ずれて積層されている。   The leg electromagnetic steel sheet 113 is provided with a hole 113h for fastening the iron core. In order to align the positions of the holes 113h after the lamination of the leg-use electromagnetic steel plates 113, six types of leg-use electromagnetic steel plates 113 having different formation positions of the holes 113h are sequentially shifted and laminated.

本比較形態においては、３つの脚部の各々は、直方体状の外形を有している。すなわち、脚部に凹凸は形成されていない。   In this comparative form, each of the three legs has a rectangular parallelepiped outer shape. In other words, no irregularities are formed on the legs.

継鉄部は、脚部の並ぶ方向の一方向に順次ずれて積層されている台形の外形を有する継鉄部用電磁鋼板１１１および５角形の外形を有する継鉄部用電磁鋼板１１２からなる継鉄部用電磁鋼板群が繰り返し積層されることにより、構成されている。本比較形態においては、継鉄部における１つの継鉄部用電磁鋼板群は、６枚の継鉄部用電磁鋼板１１１および６枚の継鉄部用電磁鋼板１１２からなる。   The yoke portion is composed of a yoke-shaped electromagnetic steel plate 111 having a trapezoidal shape and sequentially laminated in one direction in which the legs are arranged, and a yoke-shaped electromagnetic steel plate 112 having a pentagonal shape. It is comprised by repeatedly laminating | stacking the electrical steel sheet group for iron parts. In this comparative embodiment, one yoke part electromagnetic steel sheet group in the yoke part is composed of six yoke part electromagnetic steel sheets 111 and six yoke part electromagnetic steel sheets 112.

継鉄部用電磁鋼板１１１には、鉄心締めつけ用の孔１１１ｈが設けられている。継鉄部用電磁鋼板１１１の積層後の孔１１１ｈの位置を揃えるために、孔１１１ｈの形成位置が互いに異なる６種類の継鉄部用電磁鋼板１１１が順次ずれて積層されている。   The electromagnetic steel plate 111 for the yoke part is provided with a hole 111h for fastening the iron core. In order to align the positions of the holes 111h after the lamination of the electromagnetic steel sheets 111 for the yoke part, the six types of electromagnetic steel sheets 111 for the yoke parts having different formation positions of the holes 111h are sequentially shifted and laminated.

継鉄部用電磁鋼板１１２には、鉄心締めつけ用の孔１１２ｈが設けられている。継鉄部用電磁鋼板１１２の積層後の孔１１２ｈの位置を揃えるために、孔１１２ｈの形成位置が互いに異なる６種類の継鉄部用電磁鋼板１１２が順次ずれて積層されている。   The yoke steel sheet 112 is provided with an iron core fastening hole 112h. In order to align the positions of the holes 112h after the lamination of the electromagnetic steel sheets 112 for the yoke part, six types of electromagnetic steel sheets 112 for the yoke parts having different formation positions of the holes 112h are sequentially shifted and laminated.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と交差している。本比較形態においては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と４５°の角度で交差している。   In each layer, the joint portion between the leg portion electromagnetic steel sheet 113 and the yoke portion electromagnetic steel sheets 111 and 112 intersects each of the direction in which the leg portions are aligned and the direction in which the leg portions extend. In this comparative embodiment, the joint portion between the leg portion electromagnetic steel sheet 113 and the yoke portion electromagnetic steel sheets 111 and 112 intersects each of the direction in which the leg portions are aligned and the direction in which the leg portions extend at an angle of 45 °. ing.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向における脚部用電磁鋼板１１３の全幅の一部に位置している。また、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の延在方向における継鉄部用電磁鋼板１１１，１１２の全幅の一部に位置している。   In each layer, the joint between the leg electromagnetic steel sheet 113 and the yoke magnetic steel sheets 111 and 112 is located at a part of the entire width of the leg electromagnetic steel sheet 113 in the direction in which the legs are arranged. In addition, the joint between the electromagnetic steel plate for leg portion 113 and the electromagnetic steel plate for yoke portion 111, 112 is located at a part of the entire width of the electromagnetic steel plate for yoke portion 111, 112 in the extending direction of the leg portion. .

すなわち、本比較形態においては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２とが接合していない非接合部３０，３１，４０，４１が形成されている。脚部用電磁鋼板１１３において非接合部３０となる部分は、鉄心１１０ｂの外形において、脚部の延在方向に突出している。また、脚部用電磁鋼板１１４と継鉄部用電磁鋼板１１１，１１２とが接合していない非接合部５１が形成されている。   That is, in this comparative form, the non-joining parts 30, 31, 40, 41 in which the leg steel sheet 113 and the yoke steel sheet 111, 112 are not joined are formed. The part which becomes the non-joining part 30 in the electromagnetic steel plate 113 for the leg protrudes in the extending direction of the leg in the outer shape of the iron core 110b. Moreover, the non-joining part 51 in which the electromagnetic steel sheet for legs 114 and the electromagnetic steel sheets for yoke parts 111 and 112 are not joined is formed.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部の位置が層毎にずれていることにより、鉄心１１０ｂの分解を防止する機能を有するステップラップ部２０が形成されている。   The step lap part 20 having the function of preventing the iron core 110b from being decomposed is formed by shifting the position of the joint between the leg steel sheet 113 and the yoke steel sheet 111, 112 for each layer. Yes.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部によって閉磁路が構成され、たとえば、図６に示すように主磁束１０が閉磁路を通過する。なお、主磁束１０が閉磁路を通過する方向は、逆でもよい。   A closed magnetic circuit is formed by the joint between the leg steel sheet 113 and the yoke steel sheet 111, 112. For example, as shown in FIG. 6, the main magnetic flux 10 passes through the closed circuit. The direction in which the main magnetic flux 10 passes through the closed magnetic path may be reversed.

次に、本発明の実施形態１に係る鉄心の構成について説明する。
(実施形態１)
図１０は、本発明の実施形態１に係る鉄心を積層方向の一方側から見た図である。図１１は、図１０の鉄心を矢印ＸＩ方向から見た図である。図１２は、図１０の鉄心を矢印ＸＩＩ方向から見た図である。図１３は、図１０の鉄心をＸＩＩＩ−ＸＩＩＩ線矢印方向から見た断面図である。 Next, the structure of the iron core according to the first embodiment of the present invention will be described.
(Embodiment 1)
FIG. 10 is a view of the iron core according to the first embodiment of the present invention as viewed from one side in the stacking direction. FIG. 11 is a view of the iron core of FIG. 10 as viewed from the direction of arrow XI. 12 is a view of the iron core of FIG. 10 as viewed from the direction of arrow XII. FIG. 13 is a cross-sectional view of the iron core of FIG. 10 as viewed from the direction of arrows XIII-XIII.

図１０〜１３に示すように、本発明の実施形態１に係る鉄心１１０ｃにおいては、中央脚部は、平行四辺形の外形を有する脚部用電磁鋼板１１４が交互に反転しつつ脚部の並ぶ方向において交互にずれた状態で積層されることにより、構成されている。脚部用電磁鋼板１１４には、鉄心締めつけ用の孔１１４ｈが設けられている。   As shown in FIGS. 10 to 13, in the iron core 110 c according to the first embodiment of the present invention, the leg portions are arranged at the center leg portion while the leg electromagnetic steel plates 114 having a parallelogram outline are alternately inverted. It is configured by being laminated in a state of being alternately shifted in the direction. The leg magnetic steel sheet 114 is provided with a hole 114h for fastening the iron core.

外側脚部は、台形の外形を有する脚部用電磁鋼板１１３が脚部の並ぶ方向において互いにずれて積層されることにより、構成されている。本実施形態においては、脚部用電磁鋼板１１３は、１層毎交互にずれて積層されている。脚部用電磁鋼板１１３には、鉄心締めつけ用の孔１１３ｈが設けられている。脚部用電磁鋼板１１３の積層後の孔１１３ｈの位置を揃えるために、孔１１３ｈの形成位置が互いに異なる２種類の脚部用電磁鋼板１１３が交互に積層されている。   The outer leg portion is configured by laminating the electromagnetic steel plates for leg portion 113 having a trapezoidal outer shape and deviating from each other in the direction in which the leg portions are arranged. In this embodiment, the electromagnetic steel plates for legs 113 are laminated so as to be alternately shifted for each layer. The leg electromagnetic steel sheet 113 is provided with a hole 113h for fastening the iron core. In order to align the positions of the holes 113h after the lamination of the leg-use electromagnetic steel plates 113, two types of leg-use electromagnetic steel plates 113 having different formation positions of the holes 113h are alternately laminated.

本実施形態においては、中央脚部にて、複数の脚部用電磁鋼板１１４が、脚部の並ぶ方向に互いにずれて積層されていることにより、脚部に凹凸が形成されている。また、外側脚部にて、複数の脚部用電磁鋼板１１３が、脚部の並ぶ方向に互いにずれて積層されていることにより、脚部に凹凸６０が形成されている。   In the present embodiment, at the central leg portion, the plurality of leg steel plates 114 are laminated so as to be shifted from each other in the direction in which the leg portions are arranged, whereby the irregularities are formed on the leg portions. In addition, the plurality of leg-use electrical steel sheets 113 are stacked so as to be shifted from each other in the direction in which the leg portions are arranged at the outer leg portion, whereby the unevenness 60 is formed on the leg portion.

継鉄部は、台形の外形を有する継鉄部用電磁鋼板１１１，１１２が、交互に入れ替わりつつ脚部の並ぶ方向において交互にずれた状態で積層されることにより、構成されている。   The yoke portion is formed by stacking the yoke portion electromagnetic steel plates 111 and 112 having a trapezoidal outer shape in a state of being alternately displaced in the direction in which the legs are arranged while being alternately replaced.

継鉄部用電磁鋼板１１１には、鉄心締めつけ用の孔１１１ｈが設けられている。継鉄部用電磁鋼板１１１の積層後の孔１１１ｈの位置を揃えるために、孔１１１ｈの形成位置が互いに異なる２種類の継鉄部用電磁鋼板１１１が積層されている。   The electromagnetic steel plate 111 for the yoke part is provided with a hole 111h for fastening the iron core. In order to align the positions of the holes 111h after the lamination of the electromagnetic steel sheet 111 for the yoke part, two types of electromagnetic steel sheets 111 for the yoke part that are different from each other are formed.

継鉄部用電磁鋼板１１２には、鉄心締めつけ用の孔１１２ｈが設けられている。継鉄部用電磁鋼板１１２の積層後の孔１１２ｈの位置を揃えるために、孔１１２ｈの形成位置が互いに異なる２種類の継鉄部用電磁鋼板１１２が積層されている。   The yoke steel sheet 112 is provided with an iron core fastening hole 112h. In order to align the positions of the holes 112h after the lamination of the electromagnetic steel sheets 112 for the yoke part, two types of electromagnetic steel sheets 112 for the yoke parts different from each other are formed.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と交差している。本実施形態においては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と４５°の角度で交差している。   In each layer, the joint portion between the leg portion electromagnetic steel sheet 113 and the yoke portion electromagnetic steel sheets 111 and 112 intersects each of the direction in which the leg portions are aligned and the direction in which the leg portions extend. In the present embodiment, the joint portion between the leg electromagnetic steel sheet 113 and the yoke electromagnetic steel sheets 111 and 112 intersects each of the leg line-up direction and the leg extension direction at an angle of 45 °. ing.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と交差して、脚部の並ぶ方向における脚部用電磁鋼板１１３の全幅、かつ、脚部の延在方向における継鉄部用電磁鋼板１１１，１１２の全幅に亘って位置している。すなわち、本実施形態に係る鉄心１１０ｃにおいては、比較形態１，２に係る鉄心１１０ａ，１１０ｂにおける非接合部３０，３１，４０，４１が形成されていない。   In each layer, the joint between the leg steel sheet 113 and the yoke steel sheet 111, 112 intersects each of the leg line-up direction and the leg extension direction in the leg line-up direction. It is located over the full width of the leg steel sheet 113 and the full width of the yoke steel sheets 111 and 112 in the extending direction of the leg part. That is, in the iron core 110c which concerns on this embodiment, the non-joining part 30, 31, 40, 41 in the iron core 110a, 110b which concerns on the comparison forms 1 and 2 is not formed.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部の位置が層毎にずれていることにより、鉄心１１０ｃの分解を防止する機能を有するオーバーラップ部２０が形成されている。   Since the position of the joint between the electromagnetic steel plate for legs 113 and the electromagnetic steel plates for yokes 111 and 112 is shifted for each layer, the overlap portion 20 having a function of preventing the decomposition of the iron core 110c is formed. Yes.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部によって閉磁路が構成され、たとえば、図１０に示すように主磁束１０が閉磁路を通過する。なお、主磁束１０が閉磁路を通過する方向は、逆でもよい。   A closed magnetic circuit is formed by the joint between the leg steel sheet 113 and the yoke steel sheets 111 and 112. For example, as shown in FIG. 10, the main magnetic flux 10 passes through the closed circuit. The direction in which the main magnetic flux 10 passes through the closed magnetic path may be reversed.

上記のように、本実施形態に係る鉄心１１０ｃにおいては、脚部に凹凸６０が形成されている。この凹凸６０は、放熱フィンとして機能する。そのため、鉄心１１０ｃにおいて脚部の発熱を抑制することができる。   As described above, in the iron core 110c according to the present embodiment, the projections and depressions 60 are formed on the legs. The unevenness 60 functions as a heat radiating fin. Therefore, the heat generation of the legs can be suppressed in the iron core 110c.

また、本実施形態に係る鉄心１１０ｃにおいては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向における脚部用電磁鋼板１１３の全幅、かつ、脚部の延在方向における継鉄部用電磁鋼板１１１，１１２の全幅に亘って位置している。これにより、鉄心１１０ｃにおいては、電力損失を低減できる。その理由を以下に説明する。   Further, in the iron core 110c according to the present embodiment, the joint portion between the leg electromagnetic steel sheet 113 and the yoke electromagnetic steel sheets 111 and 112 has a full width of the leg electromagnetic steel sheet 113 in the direction in which the legs are aligned, and The yoke steel sheet 111, 112 is located over the entire width in the extending direction of the legs. Thereby, in the iron core 110c, power loss can be reduced. The reason will be described below.

図１４は、比較形態１，２に係る鉄心における磁束の流れを示す図である。図１５は、本実施形態に係る鉄心における磁束の流れを示す図である。   FIG. 14 is a diagram showing the flow of magnetic flux in the iron cores according to comparative embodiments 1 and 2. FIG. 15 is a diagram illustrating the flow of magnetic flux in the iron core according to the present embodiment.

上記のように、比較形態１，２に係る鉄心１１０ａ，１１０ｂにおいては、非接合部３０，３１，４０，４１が形成されている。たとえば、図１４に示すように、継鉄部用電磁鋼板１１１を流れる磁束１１ａ，１１ｂ，１１ｃのうち、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１との接合部に到達した磁束１１ｂ，１１ｃは、９０°向きを変えて磁束１３ｂ，１３ｃとなって脚部用電磁鋼板１１３を流れる。   As described above, in the iron cores 110a and 110b according to the first and second comparative examples, the non-joined portions 30, 31, 40, and 41 are formed. For example, as shown in FIG. 14, among the magnetic fluxes 11 a, 11 b, and 11 c flowing through the yoke electromagnetic steel plate 111, the magnetic flux 11 b reaching the joint between the leg electromagnetic steel plate 113 and the yoke electromagnetic steel plate 111. , 11c change the direction of 90 ° to become magnetic fluxes 13b, 13c and flow through the leg electromagnetic steel sheet 113.

一方、非接合部４０に到達した磁束１１ａは、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１との接合部に近づくように向きを変えて磁束１３ａとなって脚部用電磁鋼板１１３を流れる。その結果、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１との接合部の周囲において、磁束１３ａ、１３ｂが流れる領域Ｘでは、磁束が集中することにより磁気抵抗が高くなって、局部加熱が発生する。この局部加熱により、比較形態１，２に係る鉄心１１０ａ，１１０ｂにおいて電力損失が生ずる。   On the other hand, the magnetic flux 11a that has reached the non-joined portion 40 changes its direction so as to approach the joined portion between the leg-use electromagnetic steel plate 113 and the yoke-use electromagnetic steel plate 111 and becomes a magnetic flux 13a to become the leg-use electromagnetic steel plate 113. Flowing. As a result, in the region X where the magnetic fluxes 13a and 13b flow around the joint portion between the leg-use electromagnetic steel plate 113 and the yoke-use electromagnetic steel plate 111, the magnetic resistance is increased due to the concentration of the magnetic flux, and local heating is performed. Will occur. This local heating causes power loss in the iron cores 110a and 110b according to the first and second comparative embodiments.

本実施形態に係る鉄心１１０ｃにおいては、非接合部３０，３１，４０，４１が形成されていない。そのため、図１５に示すように、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１との接合部における磁束の流れの乱れを少なくできる。その結果、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１との接合部の周囲において局部加熱が発生することを抑制して、鉄心１１０ｃの電力損失を低減できる。   In the iron core 110c according to the present embodiment, the non-joining portions 30, 31, 40, and 41 are not formed. Therefore, as shown in FIG. 15, it is possible to reduce the disturbance of the flow of magnetic flux at the joint between the leg steel sheet 113 and the yoke steel sheet 111. As a result, it is possible to suppress local heating from occurring around the joint between the leg steel sheet 113 and the yoke steel sheet 111, thereby reducing the power loss of the iron core 110c.

また、本実施形態に係る鉄心１１０ｃにおいては、比較形態１，２に係る鉄心１１０ａ，１１０ｂの外形にて脚部の延在方向に突出した部分(脚部用電磁鋼板１１３の突出部)が存在しない。そのため、脚部の延在方向における鉄心１１０ｃの外形を小さくすることができる。   Moreover, in the iron core 110c which concerns on this embodiment, the part (protrusion part of the electromagnetic steel plate 113 for legs) which protruded in the extension direction of a leg part exists in the external shape of the iron cores 110a and 110b which concern on the comparison forms 1 and 2 exists. do not do. Therefore, the outer shape of the iron core 110c in the extending direction of the legs can be reduced.

次に、本発明の実施形態２に係る鉄心の構成について説明する。実施形態２に係る鉄心は、いわゆるステップラップ接合された鉄心である。   Next, the configuration of the iron core according to the second embodiment of the present invention will be described. The iron core according to the second embodiment is a so-called step-lap joined iron core.

(実施形態２)
図１６は、本発明の実施形態２に係る鉄心を積層方向の一方側から見た図である。図１７は、図１６の鉄心を矢印ＸＶＩＩ方向から見た図である。図１８は、図１６の鉄心を矢印ＸＶＩＩＩ方向から見た図である。図１９は、図１６の鉄心をＸＩＸ−ＸＩＸ線矢印方向から見た断面図である。 (Embodiment 2)
FIG. 16 is a view of an iron core according to Embodiment 2 of the present invention as viewed from one side in the stacking direction. FIG. 17 is a view of the iron core of FIG. 16 as viewed from the direction of arrow XVII. 18 is a view of the iron core of FIG. 16 as viewed from the direction of the arrow XVIII. 19 is a cross-sectional view of the iron core of FIG. 16 as viewed from the direction of the arrow XIX-XIX.

図１６〜１９に示すように、本発明の実施形態２に係る鉄心１１０ｄにおいては、中央脚部は、脚部の並ぶ方向の一方向に順次ずれて積層されている６角形の外形を有する脚部用電磁鋼板１１４からなる脚部用電磁鋼板群が繰り返し積層されることにより、構成されている。本実施形態においては、中央脚部における１つの脚部用電磁鋼板群は、６枚の脚部用電磁鋼板１１４からなる。   As shown in FIGS. 16 to 19, in the iron core 110 d according to the second embodiment of the present invention, the center leg has a hexagonal outer shape that is sequentially shifted in one direction in which the legs are arranged. It is configured by repeatedly laminating a group of electrical steel sheets for legs composed of electrical steel sheets for parts 114. In the present embodiment, one leg magnetic steel sheet group in the central leg portion is composed of six leg magnetic steel sheets 114.

脚部用電磁鋼板１１４には、鉄心締めつけ用の孔１１４ｈが設けられている。脚部用電磁鋼板１１４の積層後の孔１１４ｈの位置を揃えるために、孔１１４ｈの形成位置が互いに異なる６種類の脚部用電磁鋼板１１４が順次ずれて積層されている。   The leg magnetic steel sheet 114 is provided with a hole 114h for fastening the iron core. In order to align the positions of the holes 114h after the lamination of the leg-use electromagnetic steel plates 114, the six types of leg-use electromagnetic steel plates 114 having different formation positions of the holes 114h are sequentially shifted and laminated.

外側脚部は、脚部の並ぶ方向の一方向に順次ずれて積層されている台形の外形を有する脚部用電磁鋼板１１３からなる脚部用電磁鋼板群が繰り返し積層されることにより、構成されている。本実施形態においては、外側脚部における１つの脚部用電磁鋼板群は、６枚の脚部用電磁鋼板１１３からなる。   The outer leg portion is configured by repeatedly laminating the leg portion electrical steel plate group composed of the leg portion electrical steel plates 113 having a trapezoidal outer shape that is sequentially shifted in one direction in which the legs are arranged. ing. In the present embodiment, one leg magnetic steel sheet group in the outer leg portion is composed of six leg magnetic steel sheets 113.

脚部用電磁鋼板１１３には、鉄心締めつけ用の孔１１３ｈが設けられている。脚部用電磁鋼板１１３の積層後の孔１１３ｈの位置を揃えるために、孔１１３ｈの形成位置が互いに異なる６種類の脚部用電磁鋼板１１３が順次ずれて積層されている。   The leg electromagnetic steel sheet 113 is provided with a hole 113h for fastening the iron core. In order to align the positions of the holes 113h after the lamination of the leg-use electromagnetic steel plates 113, six types of leg-use electromagnetic steel plates 113 having different formation positions of the holes 113h are sequentially shifted and laminated.

本実施形態においては、中央脚部にて、複数の脚部用電磁鋼板１１４が、脚部の並ぶ方向に互いにずれて積層されていることにより、脚部に凹凸が形成されている。また、外側脚部にて、複数の脚部用電磁鋼板１１３が、脚部の並ぶ方向に互いにずれて積層されていることにより、脚部に凹凸６０が形成されている。   In the present embodiment, at the central leg portion, the plurality of leg steel plates 114 are laminated so as to be shifted from each other in the direction in which the leg portions are arranged, whereby the irregularities are formed on the leg portions. In addition, the plurality of leg-use electrical steel sheets 113 are stacked so as to be shifted from each other in the direction in which the leg portions are arranged at the outer leg portion, whereby the unevenness 60 is formed on the leg portion.

継鉄部は、脚部の並ぶ方向の一方向に順次ずれて積層されている台形の外形を有する継鉄部用電磁鋼板１１１および５角形の外形を有する継鉄部用電磁鋼板１１２からなる継鉄部用電磁鋼板群が繰り返し積層されることにより、構成されている。本実施形態においては、継鉄部における１つの継鉄部用電磁鋼板群は、６枚の継鉄部用電磁鋼板１１１および６枚の継鉄部用電磁鋼板１１２からなる。   The yoke portion is composed of a yoke-shaped electromagnetic steel plate 111 having a trapezoidal shape and sequentially laminated in one direction in which the legs are arranged, and a yoke-shaped electromagnetic steel plate 112 having a pentagonal shape. It is comprised by repeatedly laminating | stacking the electrical steel sheet group for iron parts. In this embodiment, one yoke part electromagnetic steel sheet group in the yoke part is composed of six yoke part electromagnetic steel sheets 111 and six yoke part electromagnetic steel sheets 112.

継鉄部用電磁鋼板１１１には、鉄心締めつけ用の孔１１１ｈが設けられている。継鉄部用電磁鋼板１１１の積層後の孔１１１ｈの位置を揃えるために、孔１１１ｈの形成位置が互いに異なる６種類の継鉄部用電磁鋼板１１１が順次ずれて積層されている。   The electromagnetic steel plate 111 for the yoke part is provided with a hole 111h for fastening the iron core. In order to align the positions of the holes 111h after the lamination of the electromagnetic steel sheets 111 for the yoke part, the six types of electromagnetic steel sheets 111 for the yoke parts having different formation positions of the holes 111h are sequentially shifted and laminated.

継鉄部用電磁鋼板１１２には、鉄心締めつけ用の孔１１２ｈが設けられている。継鉄部用電磁鋼板１１２の積層後の孔１１２ｈの位置を揃えるために、孔１１２ｈの形成位置が互いに異なる６種類の継鉄部用電磁鋼板１１２が順次ずれて積層されている。   The yoke steel sheet 112 is provided with an iron core fastening hole 112h. In order to align the positions of the holes 112h after the lamination of the electromagnetic steel sheets 112 for the yoke part, six types of electromagnetic steel sheets 112 for the yoke parts having different formation positions of the holes 112h are sequentially shifted and laminated.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と交差している。本実施形態においては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と４５°の角度で交差している。   In each layer, the joint portion between the leg portion electromagnetic steel sheet 113 and the yoke portion electromagnetic steel sheets 111 and 112 intersects each of the direction in which the leg portions are aligned and the direction in which the leg portions extend. In the present embodiment, the joint portion between the leg electromagnetic steel sheet 113 and the yoke electromagnetic steel sheets 111 and 112 intersects each of the leg line-up direction and the leg extension direction at an angle of 45 °. ing.

各層において、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向および脚部の延在方向の各々と交差して、脚部の並ぶ方向における脚部用電磁鋼板１１３の全幅、かつ、脚部の延在方向における継鉄部用電磁鋼板１１１，１１２の全幅に亘って位置している。すなわち、本実施形態に係る鉄心１１０ｄにおいては、比較形態１，２に係る鉄心１１０ａ，１１０ｂにおける非接合部３０，３１，４０，４１が形成されていない。   In each layer, the joint between the leg steel sheet 113 and the yoke steel sheet 111, 112 intersects each of the leg line-up direction and the leg extension direction in the leg line-up direction. It is located over the full width of the leg steel sheet 113 and the full width of the yoke steel sheets 111 and 112 in the extending direction of the leg part. That is, in the iron core 110d according to the present embodiment, the non-joined portions 30, 31, 40, and 41 in the iron cores 110a and 110b according to the comparative embodiments 1 and 2 are not formed.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部の位置が層毎にずれていることにより、鉄心１１０ｄの分解を防止する機能を有するステップラップ部２０が形成されている。   The step lap portion 20 having a function of preventing the iron core 110d from being decomposed is formed by shifting the position of the joint portion between the leg portion electromagnetic steel plate 113 and the yoke portion electromagnetic steel plates 111 and 112 for each layer. Yes.

脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部によって閉磁路が構成され、たとえば、図１６に示すように主磁束１０が閉磁路を通過する。なお、主磁束１０が閉磁路を通過する方向は、逆でもよい。   A closed magnetic circuit is formed by the joint between the leg steel sheet 113 and the yoke steel sheets 111 and 112. For example, as shown in FIG. 16, the main magnetic flux 10 passes through the closed circuit. The direction in which the main magnetic flux 10 passes through the closed magnetic path may be reversed.

上記のように、本実施形態に係る鉄心１１０ｄにおいては、脚部に凹凸６０が形成されている。この凹凸６０は、放熱フィンとして機能する。そのため、鉄心１１０ｄにおいて脚部の発熱を抑制することができる。   As described above, in the iron core 110d according to the present embodiment, the projections and depressions 60 are formed on the legs. The unevenness 60 functions as a heat radiating fin. Therefore, the heat generation of the legs can be suppressed in the iron core 110d.

また、本実施形態に係る鉄心１１０ｄにおいては、脚部用電磁鋼板１１３と継鉄部用電磁鋼板１１１，１１２との接合部は、脚部の並ぶ方向における脚部用電磁鋼板１１３の全幅、かつ、脚部の延在方向における継鉄部用電磁鋼板１１１，１１２の全幅に亘って位置している。これにより、鉄心１１０ｄにおいては、電力損失を低減できる。   In addition, in the iron core 110d according to the present embodiment, the joint portion between the leg electromagnetic steel sheet 113 and the yoke electromagnetic steel sheets 111 and 112 has the full width of the leg electromagnetic steel sheet 113 in the direction in which the legs are aligned, and The yoke steel sheet 111, 112 is located over the entire width in the extending direction of the legs. Thereby, power loss can be reduced in the iron core 110d.

さらに、本実施形態に係る鉄心１１０ｄにおいては、比較形態１，２に係る鉄心１１０ａ，１１０ｂの外形において脚部の延在方向に突出した部分(脚部用電磁鋼板１１３の突出部)が存在しない。そのため、脚部の延在方向における鉄心１１０ｄの外形を小さくすることができる。   Furthermore, in the iron core 110d according to the present embodiment, there is no portion protruding in the extending direction of the leg portion (the protruding portion of the leg electromagnetic steel sheet 113) in the outer shape of the iron cores 110a and 110b according to the first and second comparative embodiments. . Therefore, the outer shape of the iron core 110d in the extending direction of the leg portion can be reduced.

なお、今回開示した上記実施形態はすべての点で例示であって、限定的な解釈の根拠となるものではない。したがって、本発明の技術的範囲は、上記した実施形態のみによって解釈されるものではなく、特許請求の範囲の記載に基づいて画定される。また、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。   In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It does not become a basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims. Further, all modifications within the meaning and scope equivalent to the scope of the claims are included.

１０ 主磁束、１１ａ，１１ｂ，１１ｃ，１３ａ，１３ｂ，１３ｃ 磁束、２０ オーバーラップ部、ステップラップ部、３０，３１，４０，４１、５１ 非接合部、６０ 凹凸、１００ 三相変圧器、１１０，１１０ａ，１１０ｂ，１１０ｃ，１１０ｄ 鉄心、１１１，１１２ 継鉄部用電磁鋼板、１１１ｈ，１１２ｈ，１１３ｈ，１１４ｈ 孔、１１３，１１４ 脚部用電磁鋼板、１２０ 巻線。   10 main magnetic flux, 11a, 11b, 11c, 13a, 13b, 13c magnetic flux, 20 overlap part, step lap part, 30, 31, 40, 41, 51 non-joined part, 60 unevenness, 100 three-phase transformer, 110, 110a, 110b, 110c, 110d Iron core, 111, 112 yoke steel sheet, 111h, 112h, 113h, 114h hole, 113, 114 leg steel sheet, 120 windings.

Claims (3)

互いに間隔を置いて並んで延在する３つの脚部、および、該脚部の延在方向の端部同士を接続して閉磁路を構成する継鉄部を含む三相変圧器用鉄心であって、
積層されて前記脚部を構成する複数の脚部用電磁鋼板と、
積層されて前記継鉄部を構成する複数の継鉄部用電磁鋼板とを備え、
各層において、前記脚部用電磁鋼板と前記継鉄部用電磁鋼板との接合部は、前記脚部の並ぶ方向および前記延在方向の各々と交差して、前記脚部の並ぶ方向における前記脚部用電磁鋼板の全幅、かつ、前記延在方向における前記継鉄部用電磁鋼板の全幅に亘って位置し、
各前記脚部において、前記複数の脚部用電磁鋼板が、前記脚部の並ぶ方向に互いにずれて積層されていることにより、前記脚部に凹凸が形成されている、三相変圧器用鉄心。 An iron core for a three-phase transformer including three leg portions extending side by side at a distance from each other, and a yoke portion connecting end portions in the extending direction of the leg portions to form a closed magnetic circuit ,
A plurality of electrical steel sheets for legs that are laminated to form the legs, and
Comprising a plurality of electromagnetic steel sheets for the yoke part that are laminated to constitute the yoke part,
In each layer, the joint between the electromagnetic steel plate for legs and the electromagnetic steel plate for yokes intersects each of the direction in which the legs are arranged and the extending direction, and the legs in the direction in which the legs are arranged Located across the entire width of the electromagnetic steel sheet for the yoke part in the extending direction,
An iron core for a three-phase transformer, in which the leg portions are formed with irregularities in the leg portions by laminating the plurality of leg-use electrical steel sheets in a direction in which the leg portions are arranged. 前記脚部が、前記脚部の並ぶ方向において前記脚部用電磁鋼板が交互にずれて積層されて構成されている、請求項１に記載の三相変圧器用鉄心。   2. The iron core for a three-phase transformer according to claim 1, wherein the leg portion is configured by laminating and laminating the leg steel plate in the direction in which the leg portions are arranged. 3. 前記脚部が、前記脚部の並ぶ方向の一方向に順次ずれて積層されている前記脚部用電磁鋼板からなる脚部用電磁鋼板群が繰り返し積層されて構成されている、請求項１に記載の三相変圧器用鉄心。   The leg part is configured by repeatedly laminating a group of leg steel sheets made of the leg steel sheet in which the leg parts are sequentially shifted in one direction in which the legs are arranged. The three-phase transformer core described.
JP2014068334A 2014-03-28 2014-03-28 Iron core for three-phase transformer Pending JP2015192031A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200488717Y1 (en) 2017-07-24 2019-03-11 주식회사 한강기전 Transformer core

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200488717Y1 (en) 2017-07-24 2019-03-11 주식회사 한강기전 Transformer core

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