JP2019040907A - Wound core - Google Patents

Wound core Download PDF

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JP2019040907A
JP2019040907A JP2017159461A JP2017159461A JP2019040907A JP 2019040907 A JP2019040907 A JP 2019040907A JP 2017159461 A JP2017159461 A JP 2017159461A JP 2017159461 A JP2017159461 A JP 2017159461A JP 2019040907 A JP2019040907 A JP 2019040907A
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soft magnetic
magnetic band
band
winding direction
shape
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JP7150418B2 (en
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新井　聡
Satoshi Arai
聡 新井
雅人 溝上
Masahito Mizogami
雅人 溝上
崇人 水村
Takahito Mizumura
崇人 水村
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Nippon Steel Corp
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Nippon Steel and Sumitomo Metal Corp
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Abstract

To suppress concentration of a magnetic flux at an end in a winding direction of a soft magnetic band constituting a wound core.SOLUTION: A wound core 100 having a wound soft magnetic band has a first end and a second end facing each other in a winding direction of the wound soft magnetic band. Shapes of the first end and the second end when viewed along a direction perpendicular to a band plane of the soft magnetic band have at least one of a bending portion and a curved portion. Furthermore, shapes of the first end and the second end when viewed along a direction perpendicular to the band plane of the soft magnetic band have at least one of V-shaped and arc-shaped ones.SELECTED DRAWING: Figure 1

Description

本発明は、巻鉄心に関する。   The present invention relates to a wound iron core.

近年、ＣＯ2の排出量の削減や、省エネルギー化のために、電気機器の高効率化が求められている。そこで、変圧器やリアクトル等の電気機器で使用される巻鉄心の鉄損を低減することが求められている。そこで、巻鉄心を構成する方向性電磁鋼板等の軟磁性材料自体の鉄損を低減する技術の開発が精力的に進められている。しかしながら、このような素材の低鉄損化のみでは、電気機器における最終的な損失を十分に低減することができない。このため、巻鉄心としての低損失化が強く求められている。 In recent years, there has been a demand for higher efficiency of electrical equipment in order to reduce CO 2 emissions and save energy. Therefore, it is required to reduce the iron loss of the wound core used in electrical equipment such as a transformer and a reactor. Therefore, development of a technique for reducing the iron loss of the soft magnetic material itself such as the grain-oriented electrical steel sheet constituting the wound iron core has been energetically advanced. However, it is not possible to sufficiently reduce the final loss in electrical equipment only by reducing the iron loss of such a material. For this reason, low loss as a wound iron core is strongly demanded.

巻鉄心の損失を低減するための技術として特許文献１、２に記載の技術がある。
特許文献１、２には、片方の表面に線状の溝を形成した一方向性電磁鋼板を、当該溝が外巻き側または内巻き側に位置するように巻き重ねて構成された巻鉄心が開示されている。 As techniques for reducing the loss of the wound core, there are techniques described in Patent Documents 1 and 2.
In Patent Documents 1 and 2, there is a wound iron core formed by winding a unidirectional electrical steel sheet in which a linear groove is formed on one surface so that the groove is positioned on the outer winding side or the inner winding side. It is disclosed.

特開昭６１−１５３０９号公報Japanese Patent Laid-Open No. 61-15309 特公平６−２２１７９号公報Japanese Patent Publication No. 6-22179 特開２００８−１６６６３６号公報JP 2008-166636 A

ところで、巻鉄心には、励磁巻線等のコイルを巻鉄心に挿入すること等を目的として、突き合わせ部が形成される。突き合わせ部は、軟磁性帯（帯状の軟磁性体）を巻き回して歪み取り焼鈍を行った後、軟磁性帯をその厚み方向に切断することにより形成される、軟磁性帯の巻回方向の端部である。コイルを挿入した後、突き合わせ部同士が突き合わされて巻鉄心が構成される。突き合わせ部同士が突き合わさる部分には空隙が生じ、この空隙の部分の透磁率は軟磁性帯の透磁率よりも小さい。このため、突き合わせ部（軟磁性帯の巻回方向の端部）では、磁束の集中が起こりやすい。
しかしながら、特許文献１、２に記載の技術では、突き合わせ部（軟磁性帯の巻回方向の端部）における磁束の集中を考慮していない。従って、鉄心の鉄損を十分に低減することが容易ではない。 By the way, a butt portion is formed in the wound core for the purpose of inserting a coil such as an excitation winding into the wound core. The butt portion is formed by winding a soft magnetic band (strip-shaped soft magnetic body) and performing strain relief annealing, and then cutting the soft magnetic band in the thickness direction thereof. It is an end. After inserting the coil, the butted parts are butted together to form a wound iron core. An air gap is generated at a portion where the abutting portions abut each other, and the magnetic permeability of the air gap portion is smaller than the magnetic permeability of the soft magnetic band. For this reason, the concentration of magnetic flux tends to occur at the abutting portion (the end portion in the winding direction of the soft magnetic band).
However, the techniques described in Patent Documents 1 and 2 do not consider the concentration of magnetic flux at the butt portion (the end portion in the winding direction of the soft magnetic band). Therefore, it is not easy to sufficiently reduce the iron loss of the iron core.

本発明は、以上のような問題点に鑑みてなされたものであり、巻鉄心を構成する軟磁性帯の巻回方向の端部における磁束の集中を抑制することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to suppress the concentration of magnetic flux at the end in the winding direction of the soft magnetic band constituting the wound core.

本発明の巻鉄心は、巻回された軟磁性帯を有する巻鉄心であって、前記巻回された前記軟磁性帯の巻回方向に、相互に対向する第１の端部および第２の端部を有し、前記軟磁性帯の帯面に対して垂直な方向に沿って見た場合の前記第１の端部および前記第２の端部の形状は、屈曲部および湾曲部の少なくとも何れか一方を少なくとも一つ有する形状であることを特徴とする。   The wound core of the present invention is a wound core having a wound soft magnetic band, and a first end and a second end facing each other in the winding direction of the wound soft magnetic band. The shape of the first end and the second end when viewed along a direction perpendicular to the band surface of the soft magnetic band is at least one of a bent portion and a curved portion. It is a shape having at least one of either one.

本発明によれば、巻鉄心を構成する軟磁性帯の巻回方向の端部における磁束の集中を抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, the concentration of the magnetic flux in the edge part of the winding direction of the soft-magnetic band which comprises a wound iron core can be suppressed.

図１は、巻鉄心の構成の一例を示す図である。FIG. 1 is a diagram illustrating an example of a configuration of a wound iron core. 図２は、軟磁性帯の巻回方向の端部を、軟磁性帯の短手方向に沿って見た図である。FIG. 2 is a view of an end portion in the winding direction of the soft magnetic band as viewed along the short direction of the soft magnetic band. 図３は、軟磁性帯の巻回方向の端部を、軟磁性帯の帯面に対して垂直な方向に沿って見た図である。FIG. 3 is a view of an end portion in the winding direction of the soft magnetic band along a direction perpendicular to the band surface of the soft magnetic band. 図４は、軟磁性帯の巻回方向の端部を突き合わせる様子の一例を示す斜視図である。FIG. 4 is a perspective view showing an example of a state in which end portions in the winding direction of the soft magnetic band are abutted. 図５は、軟磁性帯の端部の形状の比較例を示す図であり、軟磁性帯の巻回方向の端部を、軟磁性帯の帯面に対して垂直な方向に沿って見た図である。FIG. 5 is a view showing a comparative example of the shape of the end portion of the soft magnetic band, and the end portion in the winding direction of the soft magnetic band is viewed along a direction perpendicular to the band surface of the soft magnetic band. FIG. 図６は、軟磁性帯の巻回方向の端部の形状の比較例を示す図であり、軟磁性帯の端部の形状を示す斜視図である。FIG. 6 is a view showing a comparative example of the shape of the end of the soft magnetic band in the winding direction, and is a perspective view showing the shape of the end of the soft magnetic band. 図７は、軟磁性帯の巻回方向の端部の形状の第１の変形例を示す図であり、軟磁性帯の端部を、軟磁性帯の帯面に対して垂直な方向に沿って見た図である。FIG. 7 is a diagram showing a first modification of the shape of the end portion in the winding direction of the soft magnetic band, and the end portion of the soft magnetic band extends along a direction perpendicular to the surface of the soft magnetic band. FIG. 図８は、軟磁性帯の巻回方向の端部の形状の第２の変形例を示す図であり、軟磁性帯の端部を、軟磁性帯の短手方向に沿って見た図である。FIG. 8 is a diagram illustrating a second modification of the shape of the end portion in the winding direction of the soft magnetic band, and is a view of the end portion of the soft magnetic band as viewed along the short direction of the soft magnetic band. is there. 図９は、軟磁性帯の巻回方向の端部の形状の第２の変形例を示す図であり、軟磁性帯の巻回方向の端部を突き合わせる様子の一例を示す斜視図である。FIG. 9 is a diagram showing a second modification of the shape of the end portion in the winding direction of the soft magnetic band, and is a perspective view showing an example of a state in which the end portion in the winding direction of the soft magnetic band is abutted. .

以下、図面を参照しながら、本発明の一実施形態を説明する。尚、各図において、Ｘ軸、Ｙ軸、Ｚ軸は、各図における向きの関係を示すものである。○の中に●を付したものは、紙面の奥側から手前側に向く方向を示し、○の中に×を付したものは、紙面の手前側から奥側に向く方向を示す。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, the X-axis, Y-axis, and Z-axis indicate the relationship of orientation in each figure. A circle with ● indicates a direction from the back side to the near side of the paper, and a circle with cross indicates a direction from the near side to the back side of the paper.

図１は、巻鉄心１００の構成の一例を示す図である。
図１において、本実施形態の巻鉄心１００は、所定の幅にスリット剪断された軟磁性帯（帯状の軟磁性体）を芯金に巻き回して中空のトラック状にし、中空のトラック状にした軟磁性帯に対して歪み取り焼鈍を行った後、当該中空のトラック状の軟磁性帯が一カ所で分離される（巻回方向において分断される）ように、各軟磁性帯を切断することにより構成される。そうすると、各軟磁性帯には、その巻回方向（周方向）において、相互に対向する２つの端部（第１の端部および第２の端部）が形成される。図１では、領域Ａ内に示す縦線（Ｚ軸方向に延びる線）と、最外周の軟磁性帯の帯面上に示す線（Ｖ字状の線）とが、軟磁性帯の巻回方向の端部を示す部分である。 FIG. 1 is a diagram illustrating an example of the configuration of the wound core 100.
In FIG. 1, a wound iron core 100 according to the present embodiment is formed into a hollow track by winding a soft magnetic band (strip-shaped soft magnetic material) slit-sheared to a predetermined width around a cored bar. After performing strain relief annealing on the soft magnetic band, each soft magnetic band is cut so that the hollow track-shaped soft magnetic band is separated at one place (divided in the winding direction). Consists of. Then, two end portions (first end portion and second end portion) facing each other are formed in each soft magnetic band in the winding direction (circumferential direction). In FIG. 1, the vertical line (line extending in the Z-axis direction) shown in the region A and the line (V-shaped line) shown on the outermost soft magnetic band are the winding of the soft magnetic band. It is a part which shows the edge part of a direction.

尚、巻鉄心１００を構成する軟磁性帯は、方向性電磁鋼帯、無方向性電磁鋼帯、アモルファス磁性材料等、巻鉄心として使用可能なものであれば、どのようなものであってもよい。また、巻鉄心の形状は、トラック状に限定されず、円環状やドーナツ状等、巻軸に沿う方向の両端が開口する中空形状であれば、どのような形状であってもよい。また、本実施形態の巻鉄心１００は、例えば、変圧器やリアクトル等、巻鉄心を使用する電気機器であれば、どのような電気機器であっても適用することができる。また、本実施形態では、軟磁性帯の巻回方向において相互に対向する２つの端部（第１の端部および第２の端部）が一箇所において形成される場合を例に挙げて説明する。しかしながら、軟磁性帯の巻回方向において相互に対向する２つの端部（第１の端部および第２の端部）が二箇所において形成されていてもよい。この場合、軟磁性帯の巻回方向において相互に対向する２つの端部に関する以下の説明は、これら二箇所のうちの少なくとも何れか一方において適用することができる。   The soft magnetic strip constituting the wound core 100 may be any directional electromagnetic steel strip, non-directional electromagnetic steel strip, amorphous magnetic material, etc., as long as it can be used as a wound core. Good. Further, the shape of the wound iron core is not limited to a track shape, and may be any shape as long as it is a hollow shape in which both ends in the direction along the winding axis are open, such as an annular shape or a donut shape. The wound core 100 of the present embodiment can be applied to any electrical device as long as it is an electrical device that uses a wound core, such as a transformer or a reactor. Further, in the present embodiment, a case where two end portions (a first end portion and a second end portion) facing each other in the winding direction of the soft magnetic band are formed at one place will be described as an example. To do. However, two end portions (first end portion and second end portion) that face each other in the winding direction of the soft magnetic band may be formed at two locations. In this case, the following description regarding the two end portions facing each other in the winding direction of the soft magnetic band can be applied to at least one of these two locations.

図２は、図１の領域Ａの部分を拡大して示す図であり、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊを、軟磁性帯の短手方向に沿って見た図である。尚、軟磁性帯の短手方向は、Ｙ軸方向であり、軟磁性帯の巻回方向（図２ではＸ軸方向）と、軟磁性帯の帯面に垂直な方向（図２ではＺ軸方向）とに垂直な方向である。図３は、軟磁性帯の巻回方向の端部２０１ａを、軟磁性帯の帯面に対して垂直な方向に沿って見た図である。図４は、軟磁性帯の巻回方向の端部を突き合わせる様子の一例を示す斜視図である。尚、図３では、軟磁性帯の巻回方向の端部２０１ａのみを示すが、その他の端部２０１ｂ〜２０１ｊについても、軟磁性帯の帯面に対して垂直な方向に沿って見たときの形状は、図３に示す端部２０１ａの形状と同じである。   FIG. 2 is an enlarged view of a region A in FIG. 1, and is a view of end portions 201a to 201j in the winding direction of the soft magnetic band as viewed along the short direction of the soft magnetic band. . The short direction of the soft magnetic band is the Y-axis direction, and the winding direction of the soft magnetic band (X-axis direction in FIG. 2) and the direction perpendicular to the surface of the soft magnetic band (Z-axis in FIG. 2). Direction). FIG. 3 is a view of the end portion 201a in the winding direction of the soft magnetic band as viewed along a direction perpendicular to the band surface of the soft magnetic band. FIG. 4 is a perspective view showing an example of a state in which end portions in the winding direction of the soft magnetic band are abutted. FIG. 3 shows only the end portion 201a in the winding direction of the soft magnetic band, but the other end portions 201b to 201j are also viewed along the direction perpendicular to the band surface of the soft magnetic band. The shape of is the same as the shape of the end 201a shown in FIG.

図４に示すように、巻回方向において相互に対向する一方の端部と他方の端部（第１の端部および第２の端部）は、白抜きの矢印線で示す方向に接近し、突き合わされる。このようにして突き合わされた軟磁性帯の各層において、巻回方向（周方向）の一方の端部と他方の端部（第１の端部および第２の端部）は、相互に対向する。尚、巻回方向において相互に対向する２つの端部（第１の端部および第２の端部）の間にできる空隙が可及的に小さくなるように当該２つの端部を密着させるのが好ましい。巻回方向において相互に対向する２つの端部の間の磁気抵抗を小さくすることができるからである。尚、図２および図３では、巻回方向において相互に対向する２つの端部（第１の端部および第２の端部）を纏めて端部２０１ａ〜２０１ｊと表記している（以下の説明では、これら巻回方向において相互に対向する２つの端部を必要に応じて端部と総称する）。   As shown in FIG. 4, one end and the other end (the first end and the second end) facing each other in the winding direction approach the direction indicated by the white arrow line. Butt. In each of the layers of the soft magnetic bands that are butted in this way, one end in the winding direction (circumferential direction) and the other end (the first end and the second end) face each other. . In addition, the two end portions are brought into close contact so that a gap formed between two end portions (the first end portion and the second end portion) facing each other in the winding direction becomes as small as possible. Is preferred. This is because the magnetic resistance between the two ends facing each other in the winding direction can be reduced. 2 and 3, two end portions (first end portion and second end portion) facing each other in the winding direction are collectively referred to as end portions 201a to 201j (hereinafter referred to as “end portions 201a to 201j”). In the description, these two end portions facing each other in the winding direction are collectively referred to as end portions as necessary).

図１、図２、および図４に示すように、本実施形態では、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの接合（突き合わせ）の方式がステップラップ接合である場合を例に挙げて説明する。図１、図２、及び図４に示すように、ステップラップ接合は、軟磁性帯の短手方向（軟磁性帯の巻回方向および厚み方向に垂直な方向）に沿って軟磁性帯を見た場合（即ち、軟磁性帯の厚み部分を見た場合）に、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの位置が、周期的に階段状にずれるように軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊを配置することにより実現される。図１、図２、および図４に示す例では、軟磁性帯の短手方向に沿って軟磁性帯を見た場合に、軟磁性帯の厚み方向で隣接する５つの軟磁性帯毎に、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊのそれぞれの位置が、周期的に階段状にずれるようにする場合を示す。尚、図１、図２、および図４に示す例では、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの位置を、１つの軟磁性帯毎にずらす場合を示すが、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの位置を、複数の軟磁性帯毎にずらすようにしてもよい。   As shown in FIGS. 1, 2, and 4, in this embodiment, the case where the joining (butting) method of the end portions 201 a to 201 j in the winding direction of the soft magnetic band is step lap joining is taken as an example. I will explain. As shown in FIG. 1, FIG. 2, and FIG. 4, in step lap joining, the soft magnetic band is observed along the short direction of the soft magnetic band (the direction perpendicular to the winding direction and the thickness direction of the soft magnetic band). When the soft magnetic band is wound (that is, when the thickness of the soft magnetic band is viewed), the positions of the ends 201a to 201j in the winding direction of the soft magnetic band are periodically shifted stepwise. This is realized by arranging the direction end portions 201a to 201j. In the example shown in FIG. 1, FIG. 2, and FIG. 4, when the soft magnetic band is viewed along the short direction of the soft magnetic band, every five soft magnetic bands adjacent in the thickness direction of the soft magnetic band, A case where the respective positions of the end portions 201a to 201j in the winding direction of the soft magnetic band are shifted periodically in a staircase shape is shown. 1, 2, and 4, the positions of the end portions 201 a to 201 j in the winding direction of the soft magnetic band are shifted for each soft magnetic band. The positions of the ends 201a to 201j in the winding direction may be shifted for each of the plurality of soft magnetic bands.

以上のようなステップラップ接合を採用することによって、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊを、軟磁性帯の短手方向に沿って見た場合に、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの位置が、徐々に変化するため、軟磁性帯の端部の厚み方向（図２ではＺ軸方向）の各位置における磁束の集中（即ち、軟磁性帯の端部の厚み方向において磁束が不均一になること）を抑制することができる。   By adopting the step lap joint as described above, when the end portions 201a to 201j in the winding direction of the soft magnetic band are viewed along the short direction of the soft magnetic band, the winding direction of the soft magnetic band Since the positions of the end portions 201a to 201j gradually change, the concentration of magnetic flux at each position in the thickness direction (Z-axis direction in FIG. 2) of the end portion of the soft magnetic band (that is, the end portion of the soft magnetic band) It is possible to suppress the magnetic flux from becoming nonuniform in the thickness direction.

また、本実施形態では、図１、図３、および図４に示すように、軟磁性帯の帯面に対して垂直な方向（図３ではＺ軸方向）に沿って軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊを見た場合の各軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの形状が、Ｖ字状となるようにする。そして、軟磁性帯の巻回方向の端部同士が対向し、当該端部を構成する面（Ｖ字状の部分の面）が相互に平行になるようにすることで、当該端部同士が嵌め合うようにする。このようにすることにより、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊを、軟磁性帯の帯面に対して垂直な方向に沿って見た場合に、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの位置が、徐々に変化する。また、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの面積を広くすることができる。従って、軟磁性帯の端部２０１ａ〜２０１ｊの厚み方向（図２ではＺ軸方向）のみでなく、軟磁性帯の端部２０１ａ〜２０１ｊの面内方向（Ｙ軸方向）の各位置における磁束の集中（磁束が不均一になること）を抑制することができる。よって、軟磁性帯の端部全体の磁束の集中を抑制することができる。尚、Ｖ字の頂点の角度（頂角）は任意である（即ち、鋭角であっても鈍角であっても直角であってもよい）。   Further, in this embodiment, as shown in FIGS. 1, 3, and 4, the winding of the soft magnetic band along the direction perpendicular to the band surface of the soft magnetic band (Z-axis direction in FIG. 3). When the end portions 201a to 201j in the direction are viewed, the shape of the end portions 201a to 201j in the winding direction of each soft magnetic band is V-shaped. And the ends in the winding direction of the soft magnetic band are opposed to each other, and the ends (surfaces of the V-shaped portion) constituting the ends are parallel to each other, so that the ends are Fit together. By doing in this way, when the end portions 201a to 201j in the winding direction of the soft magnetic band are viewed along the direction perpendicular to the band surface of the soft magnetic band, The positions of the end portions 201a to 201j are gradually changed. Further, the area of the end portions 201a to 201j in the winding direction of the soft magnetic band can be increased. Therefore, not only the thickness direction (Z-axis direction in FIG. 2) of the end portions 201a to 201j of the soft magnetic band but also the magnetic flux at each position in the in-plane direction (Y-axis direction) of the end portions 201a to 201j of the soft magnetic band. Concentration (magnetic flux becomes nonuniform) can be suppressed. Therefore, it is possible to suppress the concentration of magnetic flux in the entire end portion of the soft magnetic band. In addition, the angle (vertical angle) of the V-shaped apex is arbitrary (that is, it may be an acute angle, an obtuse angle, or a right angle).

本実施形態では、軟磁性帯の帯面に対して垂直な方向（図３、図４ではＺ軸方向）から見た場合の各軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの形状は同一である。このようにすることによって、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの形状を統一することができる。従って、軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊを形成する工程を容易にすることができる。ただし、軟磁性帯の帯面に対して垂直な方向から見た場合の各軟磁性帯の巻回方向の端部の少なくとも１つの形状が、その他の軟磁性帯の巻回方向の端部の形状と異なっていてもよい。本実施形態では、軟磁性帯の帯面に対して垂直な方向から見た場合の各軟磁性帯の巻回方向の端部の形状は、Ｖ字状であるので、Ｖ字の頂点の角度（頂角）や位置を異ならせてもよい。   In this embodiment, the shapes of the ends 201a to 201j in the winding direction of each soft magnetic band when viewed from the direction perpendicular to the band surface of the soft magnetic band (the Z-axis direction in FIGS. 3 and 4) are as follows. Are the same. By doing so, the shapes of the end portions 201a to 201j in the winding direction of the soft magnetic band can be unified. Therefore, the process of forming the ends 201a to 201j in the winding direction of the soft magnetic band can be facilitated. However, at least one shape of the winding direction end of each soft magnetic band when viewed from the direction perpendicular to the surface of the soft magnetic band is the end of the other soft magnetic band in the winding direction. It may be different from the shape. In this embodiment, since the shape of the end portion in the winding direction of each soft magnetic band when viewed from the direction perpendicular to the band surface of the soft magnetic band is V-shaped, the angle of the vertex of the V-shaped (Vertical angle) and position may be different.

（実施例）
次に、実施例を説明する。
本実施例では、厚みが０．２３［ｍｍ］の方向性電磁鋼帯を、幅１６０［ｍｍ］にスリット剪断したものを用いて、鉄心高さＨが６００［ｍｍ］、鉄心幅Ｗが４００［ｍｍ］、積層厚みＤが１００［ｍｍ］の巻鉄心を作製した（鉄心高さＨ、鉄心幅Ｗ、積層厚みＤについては、図１を参照）。また、軟磁性帯の端部の接合（突き合わせ）の方式をステップラップ接合とした。 (Example)
Next, examples will be described.
In this example, a directional electromagnetic steel strip having a thickness of 0.23 [mm] was slit sheared to a width of 160 [mm], and the core height H was 600 [mm] and the core width W was 400. A wound core having a thickness of [mm] and a stacking thickness D of 100 [mm] was produced (see FIG. 1 for the core height H, the core width W, and the stacking thickness D). Moreover, the method of joining (butting) the end portions of the soft magnetic bands was step lap joining.

発明例では、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部の形状を、頂角が９０°のＶ字状とした。比較例では、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部の形状を、軟磁性帯の帯幅方向（短手方向）に沿う直線状とした。図５および図６は、比較例を示す図である。図５は、軟磁性帯の巻回方向の端部５０１を、軟磁性帯の帯面に対して垂直な方向に沿って見た図である。図６は、軟磁性帯の巻回方向の端部を突き合わせる様子を示す斜視図である。図５は、図３に対応する図であり、図６は、図４に対応する図である。   In the example of the invention, the shape of the end portion in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band was a V-shape with an apex angle of 90 °. In the comparative example, the shape of the end in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is the width direction (short direction) of the soft magnetic band. It was made into the linear form along. 5 and 6 are diagrams showing a comparative example. FIG. 5 is a view of the end portion 501 in the winding direction of the soft magnetic band as viewed along a direction perpendicular to the band surface of the soft magnetic band. FIG. 6 is a perspective view showing how the end portions of the soft magnetic band in the winding direction are abutted. 5 is a diagram corresponding to FIG. 3, and FIG. 6 is a diagram corresponding to FIG.

発明例および比較例の巻鉄心のそれぞれに対し、その内部の磁束密度が１．６５［Ｔ］になるように、５０［Ｈｚ］の励磁周波数で励磁し、それぞれの巻鉄心の鉄損を測定した。その結果、比較例の巻鉄心の鉄損は２５０［Ｗ］であったのに対し、発明例の巻鉄心の鉄損は２２０［Ｗ］となり、方向性電磁鋼板の板面に対して垂直な方向に沿って見た場合の各軟磁性板の巻回方向の端部の形状を三角形にすることにより、鉄損を改善することができた。   Each of the wound cores of the inventive example and the comparative example is excited at an excitation frequency of 50 [Hz] so that the magnetic flux density inside is 1.65 [T], and the iron loss of each wound core is measured. did. As a result, the iron loss of the wound core of the comparative example was 250 [W], whereas the iron loss of the wound core of the invention example was 220 [W], which was perpendicular to the plate surface of the grain-oriented electrical steel sheet. The iron loss could be improved by making the shape of the end of each soft magnetic plate in the winding direction triangular when viewed along the direction.

（まとめ）
以上のように本実施形態では、軟磁性帯を用いて巻鉄心１００を構成するに際し、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部２０１ａ〜２０１ｊの形状をＶ字状にする。従って、軟磁性帯の巻回方向の端部の面内方向の各位置における磁束の集中を抑制することができる。よって、巻鉄心を構成する軟磁性帯の巻回方向の端部における磁束の集中を低減することができる。これにより、巻鉄心の損失（鉄損）を低減することができ、低損失、低騒音の巻鉄心を実現することができる。 (Summary)
As described above, in the present embodiment, when the wound core 100 is configured using the soft magnetic band, the winding direction of each soft magnetic band when viewed along the direction perpendicular to the band surface of the soft magnetic band. The end portions 201a to 201j are V-shaped. Therefore, the concentration of magnetic flux at each position in the in-plane direction of the end portion in the winding direction of the soft magnetic band can be suppressed. Therefore, the concentration of the magnetic flux at the end portion in the winding direction of the soft magnetic band constituting the wound iron core can be reduced. Thereby, the loss (iron loss) of the wound core can be reduced, and a wound core with low loss and low noise can be realized.

（変形例）
＜第１の変形例＞
本実施形態では、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部の形状をＶ字状にする場合を例に挙げて説明した。しかしながら、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部の形状が、屈曲部および湾曲部の少なくとも何れか一方を少なくとも一つ有する形状であれば、軟磁性帯の帯面に対して垂直な方向から見た場合の各軟磁性帯の巻回方向の端部の形状はＶ字状に限定されない。 (Modification)
<First Modification>
In the present embodiment, the case where the shape of the end portion in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is V-shaped will be described as an example. did. However, the shape of the end portion in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is at least one of a bent part and a curved part. If it has the shape which has, the shape of the edge part of the winding direction of each soft magnetic belt | band | zone when it sees from the direction perpendicular | vertical with respect to the surface of a soft magnetic belt | band | zone is not limited to V shape.

図７は、軟磁性帯の巻回方向の端部の形状の第１の変形例を示す図であり、軟磁性帯の巻回方向の端部を、軟磁性帯の帯面に対して垂直な方向に沿って見た図である。図７は、図３に対応する図である。
図７（ａ）に示すように、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部７０１の形状は、Ｗ字状であってもよい。Ｗ字の頂点の角度（頂角）は任意である。また、図７（ｂ）に示すように、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部７０２の形状は、円弧状であってもよい。また、図７（ｃ）に示すように、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部７０３の形状は、軟磁性帯の短手方向（Ｙ軸方向）に複数の円弧を並べた形状であってもよい。また、図７（ｄ）に示すように、軟磁性帯の帯面に対して垂直な方向に沿って見た場合の各軟磁性帯の巻回方向の端部７０４の形状は、Ｖ字と円弧を並べた形状であってもよい。 FIG. 7 is a diagram showing a first modification of the shape of the end of the soft magnetic band in the winding direction, and the end of the soft magnetic band in the winding direction is perpendicular to the surface of the soft magnetic band. It is the figure seen along the various directions. FIG. 7 is a diagram corresponding to FIG.
As shown in FIG. 7A, the shape of the end 701 in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is W-shaped. May be. The angle (vertical angle) of the apex of the W character is arbitrary. In addition, as shown in FIG. 7B, the shape of the end 702 in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is an arc shape. There may be. Further, as shown in FIG. 7C, the shape of the end 703 in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is the soft magnetic band. A shape in which a plurality of arcs are arranged in the short direction (Y-axis direction) may be used. In addition, as shown in FIG. 7D, the shape of the end 704 in the winding direction of each soft magnetic band when viewed along the direction perpendicular to the surface of the soft magnetic band is V-shaped. The shape which arranged the circular arc may be sufficient.

＜第２の変形例＞
本実施形態のように、軟磁性帯の巻回方向の端部の接合（突き合わせ）の方式をステップラップ接合とすれば、軟磁性帯の厚み方向で磁束が集中する（不均一になる）ことを抑制することができるので好ましい。しかしながら、軟磁性帯の巻回方向の端部の接合（突き合わせ）の方式は、ステップラップ接合に限定されない。 <Second Modification>
If the method of joining (butting) the end portions in the winding direction of the soft magnetic band is a step lap joint as in this embodiment, the magnetic flux concentrates (becomes uneven) in the thickness direction of the soft magnetic band. Can be suppressed, which is preferable. However, the method of joining (butting) the end portions in the winding direction of the soft magnetic band is not limited to step lap joining.

図８は、軟磁性帯の巻回方向の端部の形状の第２の変形例を示す図であり、軟磁性帯の巻回方向の端部を、軟磁性帯の短手方向に沿って見た図である。図９は、軟磁性帯の端部の形状の第２の変形例を示す図であり、軟磁性帯の巻回方向の端部を突き合わせる様子を示す斜視図である。図８は、図２に対応する図であり、図９は、図４に対応する図である。   FIG. 8 is a diagram showing a second modification of the shape of the end of the soft magnetic band in the winding direction, and the end of the soft magnetic band in the winding direction along the short direction of the soft magnetic band. FIG. FIG. 9 is a diagram showing a second modification of the shape of the end portion of the soft magnetic band, and is a perspective view showing how the end portions of the soft magnetic band in the winding direction are abutted. FIG. 8 is a diagram corresponding to FIG. 2, and FIG. 9 is a diagram corresponding to FIG.

図８および図９に示すように、軟磁性帯の端部の接合（突き合わせ）の方式は、コンベンショナル接合であってもよい。コンベンショナル接合は、軟磁性帯の短手方向に沿って軟磁性帯の厚み部分を見た場合に、軟磁性帯の巻回方向の端部８０１ａ〜８０１ｊの位置が、第１の位置および第２の位置の２つの位置に交互に配置されるようにすることにより実現される。図８および図９に示す例では、軟磁性帯の短手方向に沿って軟磁性帯の厚み部分を見た場合に、軟磁性帯の厚み方向で隣接する２つの軟磁性帯毎に、軟磁性帯の巻回方向の端部（突き合わせ部）の位置が、第１の位置および第２の位置の２つの位置に交互に配置されるようにする場合を示す。第１の位置および第２の位置は、軟磁性帯の巻回方向（周方向）における位置であり、相互に異なる位置である。このように、巻回された軟磁性帯の各層のそれぞれについて、軟磁性帯の巻回方向の端部の、軟磁性帯の巻回方向における位置は、その他の少なくとも１つの層の軟磁性帯の巻回方向における端部の、軟磁性帯の巻回方向における位置と異なるようにすることができる。   As shown in FIGS. 8 and 9, the method of joining (butting) the end portions of the soft magnetic band may be conventional joining. In the conventional joining, when the thickness portion of the soft magnetic band is viewed along the short direction of the soft magnetic band, the positions of the end portions 801a to 801j in the winding direction of the soft magnetic band are the first position and the second position. This is realized by alternately arranging at two positions. In the example shown in FIG. 8 and FIG. 9, when the thickness of the soft magnetic band is viewed along the short direction of the soft magnetic band, the soft magnetic band is softened every two soft magnetic bands adjacent in the thickness direction of the soft magnetic band. The case where the positions of the end portions (butting portions) in the winding direction of the magnetic band are alternately arranged at two positions of the first position and the second position is shown. The first position and the second position are positions in the winding direction (circumferential direction) of the soft magnetic band, and are positions different from each other. Thus, for each of the layers of the wound soft magnetic band, the position of the end portion in the winding direction of the soft magnetic band in the winding direction of the soft magnetic band is the soft magnetic band of at least one other layer. The end portion in the winding direction can be different from the position in the winding direction of the soft magnetic band.

＜その他の変形例＞
以上説明した本発明の実施形態は、何れも本発明を実施するにあたっての具体化の例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならないものである。すなわち、本発明はその技術思想、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 <Other variations>
Each of the embodiments of the present invention described above is merely an example of actualization in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. is there. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

１００：巻鉄心、２０１ａ〜２０１ｊ、７０１〜７０４、８０１ａ〜８０１ｊ：端部   100: wound iron core, 201a-201j, 701-704, 801a-801j: end

Claims (3)

巻回された軟磁性帯を有する巻鉄心であって、
前記巻回された前記軟磁性帯の巻回方向に、相互に対向する第１の端部および第２の端部を有し、
前記軟磁性帯の帯面に対して垂直な方向に沿って見た場合の前記第１の端部および前記第２の端部の形状は、屈曲部および湾曲部の少なくとも何れか一方を少なくとも一つ有する形状であることを特徴とする巻鉄心。 A wound core having a wound soft magnetic band,
In the winding direction of the wound soft magnetic band, it has a first end and a second end facing each other,
The shape of the first end and the second end when viewed along a direction perpendicular to the surface of the soft magnetic band is at least one of a bent part and a curved part. A wound iron core characterized by having a shape. 前記軟磁性帯の帯面に対して垂直な方向に沿って見た場合の前記第１の端部および前記第２の端部の形状は、Ｖ字状および円弧状のうち、少なくとも何れか一方を含む形状であることを特徴とする請求項１に記載の巻鉄心。   The shape of the first end portion and the second end portion when viewed along a direction perpendicular to the surface of the soft magnetic band is at least one of a V shape and an arc shape. The wound iron core according to claim 1, wherein the wound iron core has a shape including 前記第１の端部および前記第２の端部の、前記軟磁性帯の巻回方向における位置は、前記第１の端部および前記第２の端部を前記軟磁性帯の巻回方向および厚み方向に垂直な方向に沿って見た場合に、階段状にずれていることを特徴とする請求項１または２に記載の巻鉄心。   The positions of the first end and the second end in the winding direction of the soft magnetic band are the same as the winding direction of the soft magnetic band and the first end and the second end. 3. The wound core according to claim 1, wherein when viewed in a direction perpendicular to the thickness direction, the wound core is displaced in a stepped manner.
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Publication number Priority date Publication date Assignee Title
KR20210115273A (en) * 2020-03-12 2021-09-27 주식회사 포스코 Wound core with a low no-load losses, wound core transformer and method for manufacturing the same

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Publication number Priority date Publication date Assignee Title
JPS4710014U (en) * 1971-02-24 1972-10-06
JP2005150507A (en) * 2003-11-18 2005-06-09 Toshiba Corp Wound iron core and transformer

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JPS4710014U (en) * 1971-02-24 1972-10-06
JP2005150507A (en) * 2003-11-18 2005-06-09 Toshiba Corp Wound iron core and transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210115273A (en) * 2020-03-12 2021-09-27 주식회사 포스코 Wound core with a low no-load losses, wound core transformer and method for manufacturing the same
KR102359769B1 (en) * 2020-03-12 2022-02-08 주식회사 포스코 Wound core with a low no-load losses, wound core transformer and method for manufacturing the same

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