JP5152839B2 - Circular iron core for stationary electromagnetic equipment - Google Patents
Circular iron core for stationary electromagnetic equipment Download PDFInfo
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- JP5152839B2 JP5152839B2 JP2007276163A JP2007276163A JP5152839B2 JP 5152839 B2 JP5152839 B2 JP 5152839B2 JP 2007276163 A JP2007276163 A JP 2007276163A JP 2007276163 A JP2007276163 A JP 2007276163A JP 5152839 B2 JP5152839 B2 JP 5152839B2
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- magnetic steel
- iron core
- circular iron
- steel plate
- circular
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 40
- 229910000831 Steel Inorganic materials 0.000 claims description 56
- 239000010959 steel Substances 0.000 claims description 56
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Soft Magnetic Materials (AREA)
Description
本発明は、変圧器やリアクトルなどの静止型電磁機器の円形鉄心に関するものである。 The present invention relates to a circular iron core of a stationary electromagnetic device such as a transformer or a reactor.
変圧器やリアクトルなどの静止型電磁機器において、鉄心に巻装するコイル導線の長さを短くするなどの理由から、鉄心を円形に形成する場合がある。この場合の鉄心として、平坦な磁性鋼板を放射状に積層して円形に構成するもの、幅寸法が僅かづつ異なる平坦な磁性鋼板を積層して円形に構成するもの、平坦な磁性鋼板を積層し、これを丸めて円形に構成するものがある。
しかし、磁性鋼板を放射状に積層した円形鉄心では、内周部分は蜜であっても外周部分では隙間ができ、鉄心の有効面積が小さくなるといった問題があり、また、幅寸法が僅かづつ異なる平坦な磁性鋼板を積層した円形鉄心では、真円に近づけるには幅寸法が異なる平坦な磁性鋼板を用意しなければならず、その組み立ても手数がかかるといった問題があり、さらには、積層した磁性鋼板を丸めた鉄心では、鋼板の平面部が外周に露出し、漏れ磁束の貫通による渦電流が発生することで鉄損が大幅に増加するといった問題があつた。 However, a circular iron core in which magnetic steel plates are laminated radially has a problem that even if the inner peripheral portion is nectar, there is a gap in the outer peripheral portion, and the effective area of the iron core is reduced, and the width dimension is slightly different and flat. In a circular iron core with laminated magnetic steel plates, there is a problem that flat magnetic steel plates with different width dimensions must be prepared in order to approach a perfect circle, and the assembly is time consuming. In the iron core rounded, the flat portion of the steel sheet is exposed to the outer periphery, and eddy currents are generated due to the penetration of leakage magnetic flux, resulting in a significant increase in iron loss.
発明が解決しようとする課題は、円形鉄心の断面全域の隙間を低減するとともに、外周面における漏れ磁束にともなう鉄損を抑制するようにし、斯かる問題を解消する点にある。 The problem to be solved by the invention is to reduce the gap in the entire cross section of the circular iron core and to suppress the iron loss caused by the leakage magnetic flux on the outer peripheral surface, thereby eliminating such a problem.
本発明は、静止型電磁機器の円形鉄心であって、前記円形鉄心を、一定の、湾曲部と、この湾曲部の内端に連続して形成された屈曲部を有し、径方向に対して直径の１／４幅以下とした多数の磁性鋼板を積み重ねて形成した円筒状の磁性鋼板ブロックの複数を同心で前記径方向に順次積層して構成してなることを特徴とする。 The present invention relates to a circular iron core of a stationary electromagnetic device, wherein the circular iron core has a constant curved portion and a bent portion formed continuously at an inner end of the curved portion, and is arranged in a radial direction. A plurality of cylindrical magnetic steel plate blocks formed by stacking a large number of magnetic steel plates having a width of ¼ or less of the diameter are stacked concentrically and sequentially in the radial direction.
本発明では、円形鉄心を、一定の、湾曲部と、この湾曲部の内端に連続して形成された屈曲部を有する多数の磁性鋼板を積み重ねて形成した円筒状の磁性鋼板ブロックを径方向に順次積層して構成するので、円形鉄心の外周部分の隙間が少なく、有効面積が大きく、かつ、磁性鋼板の平面部が外周に露出することがなく、鉄損の少ない鉄心が得られる。また、磁性鋼板ブロックを構成する磁性鋼板を径方向に対して直径の１／４幅以下とし、この磁性鋼板ブロックを同心で径方向に順次積層して構成するので、磁性鋼板ブロックの内周および外周がほぼ真円となり、これにより積み重ね易く断面積の大きい円形鉄心を簡単に得ることができる。 In the present invention, a cylindrical magnetic steel plate block formed by stacking a number of magnetic steel plates each having a circular iron core and having a constant curved portion and a bent portion formed continuously at the inner end of the curved portion is arranged in the radial direction. since constructed by sequentially stacking a less clearance in the peripheral section of the circular core, the effective area is large and, without flat portion of the magnetic steel plates are exposed to the outer periphery, the iron loss low Itetsu heart is obtained . Further, the following quarter the width of the diameter of magnetic steel plates which constitute the magnetic steel plates blocked for radial, so constituting the magnetic steel block by sequentially laminating concentrically in the radial direction, the inner periphery of the magnetic steel plates blocks and The outer periphery is almost a perfect circle, which makes it possible to easily obtain a circular iron core that is easy to stack and has a large cross-sectional area.
円形鉄心の断面全域の隙間を低減するとともに、外周面における漏れ磁束にともなう鉄損を抑制するようにする目的を、円形の径方向に一定の、湾曲部と、この湾曲部の内端に連続して形成された屈曲部を有し、その径方向に対して直径の１／４幅以下とした多数の磁性鋼板を積み重ねて円筒状の磁性鋼板ブロックを形成し、この磁性鋼板ブロックを同心で円形の径方向に順次積層することにより実現した。 The purpose is to reduce the clearance across the entire cross section of the circular iron core and to suppress iron loss due to leakage magnetic flux on the outer peripheral surface . The curved portion, which is constant in the radial direction of the circle, and the inner end of the curved portion are continuous. A cylindrical magnetic steel plate block is formed by stacking a large number of magnetic steel plates having a bent portion formed in the radial direction and having a width equal to or less than 1/4 of the diameter in the radial direction. This was realized by sequentially laminating in a circular radial direction.
図１は、本発明の実施例に係る静止型電磁機器の円形鉄心の斜視図、図２は図１に示す円形鉄心の部分拡大断面図、図３は１枚の磁性鋼板の断面図である。 1 is a perspective view of a circular iron core of a stationary electromagnetic device according to an embodiment of the present invention, FIG. 2 is a partially enlarged cross-sectional view of the circular iron core shown in FIG. 1, and FIG. 3 is a cross-sectional view of one magnetic steel plate. .
図１において、１は円形鉄心、Ａは円形鉄心１を構成する最内周の円筒状の磁性鋼板ブロック、Ｂは円形鉄心１を構成する中間の円筒状の磁性鋼板ブロック、Ｃは円形鉄心１を構成する最外周の円筒状の磁性鋼板ブロック、ＤおよびＥは絶縁層、２ａは磁性鋼板ブロックＡを構成する珪素鋼鈑からなる磁性鋼板、２ｂは磁性鋼板ブロックＢを構成する珪素鋼鈑からなる磁性鋼、板２ｃは磁性鋼板ブロックＣを構成する珪素鋼鈑からなる磁性鋼板である。
In FIG. 1, reference numeral 1 denotes a circular iron core, A denotes an innermost cylindrical magnetic steel plate block constituting the circular iron core 1, B denotes an intermediate cylindrical magnetic steel plate block constituting the circular iron core 1, and C denotes a circular iron core 1. The outermost cylindrical magnetic steel plate block constituting the steel plate, D and E are insulating layers, 2a is a magnetic steel plate made of a silicon steel plate constituting the magnetic steel plate block A, and 2b is a silicon steel plate constituting the magnetic steel plate block B. The
磁性鋼板２ａ、２ｂ、２ｃは、図３に示すように任意の曲率をもって湾曲された湾曲部３と、この湾曲部３の内端に連続して形成された屈曲部４とにより形成されている。湾曲部３の曲率は、その全体にわたって同じであってもよく、また、例えばインボリュート曲線のように連続した曲率のものであってもよい。
As shown in FIG. 3, the
屈曲部４の、湾曲部３に対する屈曲角θはたとえば３０度でよく、その長さはできるだけ短いほうがよく、たとえば磁性鋼板の厚さの３〜１０倍程度が望ましい。磁性鋼板２ａ、２ｂ、２ｃの長さ、つまり幅Ｌは、湾曲部を備える磁性鋼板を重ね易くするためできるだけ狭くし、所望の円形鉄心を得るには図２に示すように半径方向に連接する。実施例では３個の磁性鋼板を半径方向に連接して所望の円形鉄心を形成している。
The bending angle θ of the
具体的には、所定の外径の円柱（またはパイプ）を用意し、これを型としてその外周に屈曲部４の内端を当接させて、その外周に沿って順次重ねて円筒状の磁性鋼板ブロックＡを形成し、その外周面を絶縁紙やワニスなどで絶縁処理する。絶縁処理した円筒状の磁性鋼板ブロックＡの絶縁層Ｄの外周に屈曲部４の内端を当接させて、その外周に沿って順次重ねて円筒状の磁性鋼板ブロックＢを形成し、同様にその外周面を絶縁紙やワニスなどで絶縁処理する。絶縁処理した円筒状の磁性鋼板ブロックＢの絶縁層Ｅの外周に屈曲部４の内端を当接させて、その外周に沿って順次重ねて円筒状の磁性鋼板ブロックＣを形成し、円柱を抜き取り、磁性鋼板ブロックＣの外周に締め付け、歪取焼鈍後バンドを渡して全体を締め付けて形付けし、歪取焼鈍後ワニスを含浸して固定する。
Specifically, a cylindrical column (or pipe) having a predetermined outer diameter is prepared, and this is used as a mold so that the inner end of the
得られた円形鉄心は、これを構成している磁性鋼板が等価的に放射状に並べたものとなり、この円形鉄心の外周にコイルを巻装しても短絡電流が発生しないし、また漏洩磁束は、放射状鉄心と同様に磁性鋼板の内部を、その幅方向に沿って通るようになり、磁性鋼板をその厚さ方向に通ることはなくなる。これにより漏洩磁束による渦電流の発生が抑制される。また、鉄心の断面がほぼ真円となるので、巻装するコイル導線の長さをより短くすることができ、省資源を図ることができる。 The obtained circular iron core is equivalent to the magnetic steel plates constituting it arranged radially, and no short-circuit current is generated even if a coil is wound around the outer circumference of the circular iron core. Like the radial iron core, the magnetic steel sheet passes through the magnetic steel sheet along the width direction, and does not pass through the magnetic steel sheet in the thickness direction. Thereby, generation | occurrence | production of the eddy current by a leakage magnetic flux is suppressed. Further, since the cross section of the iron core is almost a perfect circle, the length of the coil conductor to be wound can be further shortened, and resource saving can be achieved.
なお、以上の実施例では、磁性鋼板ブロックＡ，Ｂ，Ｃのいずれも磁性鋼板の屈曲部を同方向に向けて積み重ねているが、各磁性鋼板ブロックの間で磁性鋼板の屈曲部を逆方向に向けて積み重ねるようにしてもよく、また、磁性鋼板ブロックは３個に限らず、より多くを径方向に積層するようにしてもよい。 In the above embodiments, all of the magnetic steel plate blocks A, B, and C are stacked with the bent portions of the magnetic steel plates oriented in the same direction, but the bent portions of the magnetic steel plates are reversed between the magnetic steel plate blocks. The number of magnetic steel plate blocks is not limited to three, and more may be stacked in the radial direction.
１ 円形鉄心
Ａ、Ｂ、Ｃ 円筒状の磁性鋼板ブロック
Ｄ、Ｅ 絶縁層
２ａ、２ｂ、２ｃ 磁性鋼板
３ 磁性鋼板の湾曲部
４ 磁性鋼板の屈曲部
DESCRIPTION OF SYMBOLS 1 Circular iron core A, B, C Cylindrical magnetic steel plate block D, E
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| JP2007276163A JP5152839B2 (en) | 2007-10-24 | 2007-10-24 | Circular iron core for stationary electromagnetic equipment |
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| JP5522658B2 (en) * | 2009-10-08 | 2014-06-18 | トクデン株式会社 | Static induction equipment |
| JP5317284B2 (en) * | 2009-10-09 | 2013-10-16 | トクデン株式会社 | Fluid heating device |
| JP5391096B2 (en) * | 2010-01-26 | 2014-01-15 | トクデン株式会社 | Annular iron core and iron core for stationary induction equipment |
| JP6282220B2 (en) * | 2013-12-20 | 2018-02-21 | トクデン株式会社 | Superheated steam generator |
| KR102195785B1 (en) | 2013-12-20 | 2020-12-28 | 토쿠덴 가부시기가이샤 | Power circuit, iron core for scott connected transformer, scott connected transformer and superheated steam generator |
| CN109063352B (en) * | 2018-08-10 | 2023-01-06 | 上海汽轮机厂有限公司 | Method for improving surface smoothness of turbine blade profile |
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| SE324404B (en) * | 1969-03-05 | 1970-06-01 | Asea Ab | |
| JPS5472455A (en) * | 1977-11-18 | 1979-06-09 | Nissin Electric Co Ltd | Core type reactor with gap |
| JPS55181322U (en) * | 1979-06-14 | 1980-12-26 | ||
| JPS60161603A (en) * | 1984-02-02 | 1985-08-23 | Toshiba Corp | Radial core |
| JP3756260B2 (en) * | 1996-08-07 | 2006-03-15 | トクデン株式会社 | Low frequency electromagnetic induction heater |
| JP2002305865A (en) * | 2001-03-30 | 2002-10-18 | Sanyo Denki Co Ltd | Cylindrical laminated core unit and cylindrical laminated core |
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