JP3869768B2 - Transformer - Google Patents
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- Publication number
- JP3869768B2 JP3869768B2 JP2002210326A JP2002210326A JP3869768B2 JP 3869768 B2 JP3869768 B2 JP 3869768B2 JP 2002210326 A JP2002210326 A JP 2002210326A JP 2002210326 A JP2002210326 A JP 2002210326A JP 3869768 B2 JP3869768 B2 JP 3869768B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- electrical steel
- oriented electrical
- transformer
- steel plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【０００１】
【発明の属する技術分野】
本発明は、鋼板を複数枚、厚さ方向に積層・固定して用いる変圧器に関する。具体的には、変圧用コイルを巻き付ける積層体に電磁鋼板を用いた変圧器に関する。
【０００２】
【従来の技術】
変圧器は、鋼板を複数枚、厚さ方向に積層・固定し、その周囲にコイルを巻き付けた構造となっている。従来の変圧器は、鉄損を低減するために無方向性電磁鋼板（ＮＯ）または方向性電磁鋼板（ＧＯ）を積層することにより作られていた。
無方向性電磁鋼板は、図５に示すように、鋼板表面のどの方向にも一様な比透磁率を有する鋼板であって、比較的鉄損の小さい材料として広く用いられているが、長時間連続運転する変圧器に用いる材料としては十分な磁気特性が得られていなかった。
【０００３】
一方、方向性電磁鋼板は、図６に示すように、特定の方向の磁気特性に優れた鋼板であって、この方向性電磁鋼板を用いた従来の変圧器の構造を図２に示す。変圧器を構成する鋼板を図２のように分割し、矢印で示した方向を磁化容易方向とする方向性電磁鋼板としていた。しかし、鋼板のＬ字型のコーナー部には２方向に磁束が流れるが、そのどちらか１方に方向性電磁鋼板の磁化容易方向を合わせる必要があり、このＬ字型のコーナー部における鉄損が大きいという問題点があった。
【０００４】
【発明が解決しようとする課題】
本発明は、前記のような従来技術の問題点を解決し、鉄損が少なく、製造コストを低減できる変圧器を提供することを課題とする。
【０００５】
【課題を解決するための手段】
本発明は、変圧器を構成する鋼板に二方向性電磁鋼板を用いることにより、鉄損が少ない変圧器を提供するものであり、その要旨は特許請求の範囲に記載した通りの下記内容である。
鋼板を複数枚、厚さ方向に積層・固定して用いる変圧器であって、該鋼板の直線部が方向性電磁鋼板からなり、該鋼板のＬ字型のコーナー部が二方向性電磁鋼板からなることを特徴とする変圧器。
【０００６】
【発明の実施の形態】
本発明の実施の形態を、図１を用いて詳細に説明する。
図１は、本発明における変圧器の実施形態を示す図である。図１に示すように、この実施形態では、変圧器を構成する鋼板の直線部が方向性電磁鋼板からなり、鋼板のＬ字型のコーナー部が二方向性電磁鋼板からなっている。図１において、交差している矢印が二方向性電磁鋼板の磁化容易方向を示し、交差していない矢印が方向性電磁鋼板の磁化容易方向を示す。
【０００７】
鋼板のＬ字型のコーナー部には２方向の磁束が流れるが、このＬ字型のコーナー部に二方向性電磁鋼板を用いることにより、磁束の方向と電磁鋼板の磁化容易方向を一致させることができるので、鉄損を著しく低減することができる。
図３は、方向性電磁鋼板および二方向性電磁鋼板の磁化容易方向の説明図である。方向性電磁鋼板は圧延方向であるＲＤ（Ｒｏｌｌｉｎｇ Ｄｉｒｅｃｔｉｏｎ）が磁化容易方向となる。
【０００８】
一方、二方向性電磁鋼板は、圧延方向を二方向とし、さらに必要な熱処理を施すことにより磁化容易方向を二方向とした鋼板であり、通常は、圧延方向に加えて、これと直角方向であるＴＤ（Ｔｒａｎｓｖｅｒｓｅ Ｄｉｒｅｃｔｉｏｎ）が磁化容易方向となる。
図４は、方向性電磁鋼板および二方向性電磁鋼板の磁気特性を示す図である。図４の横軸は磁界Ｈ、縦軸は磁束密度Ｂであり鋼板の磁気特性の指標となる比透磁率はμ＝Ｂ／Ｈとして表され、図４のグラフの傾きに相当する。方向性電磁鋼板はθ＝０（ＲＤ方向）の磁気特性がよく、二方向性電磁鋼板はθ＝０（ＲＤ方向）およびθ＝９０（ＴＤ方向）の磁気特性がよい。
【０００９】
図５は、無方向性電磁鋼板の比透磁率（μ）の特性を示す図である。無方向性電磁鋼板は、どの方向にも等しい磁気特性を有するが、方向性電磁鋼板および二方向性電磁鋼板に比べて比透磁率（μ）の値は低い。図６は、方向性電磁鋼板の比透磁率（μ）の特性を示す図である。方向性電磁鋼板は、圧延方向の比透磁率（μR）の値が大きく、その他の方向は無方向性電磁鋼板と同等である。図７ は、二方向性電磁鋼板の比透磁率（μ） の特性を示す図である。二方向性電磁鋼板は、圧延方向の比透磁率（μR）および圧延方向と直角方向の比透磁率（μT）の値が大きく、その他の方向は無方向性電磁鋼板と同等である。
【００１０】
【発明の効果】
本発明によれば、変圧器を構成する鋼板のＬ字型のコーナー部に二方向性電磁鋼板を用いることにより、磁束の方向と鋼板の磁化容易方向を一致させることができるので、鉄損を著しく低減でき三相交流を取り出し易くなるなど、産業上有用な著しい効果を奏する。
【図面の簡単な説明】
【図１】本発明における変圧器の実施形態を示す図である。
【図２】従来の変圧器の構造を示す図である。
【図３】方向性電磁鋼板および二方向性電磁鋼板の磁化容易方向の説明図である。
【図４】方向性電磁鋼板および二方向性電磁鋼板の磁気特性を示す図である。
【図５】無方向性電磁鋼板の比透磁率（μ）の特性を示す図である。
【図６】方向性電磁鋼板の比透磁率（μ）の特性を示す図である。
【図７】二方向性電磁鋼板の比透磁率（μ）の特性を示す図である。
【符号の説明】
１ ： 鋼板
２ ： 直線部
３ ： Ｌ字型のコーナー部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transformer used by laminating and fixing a plurality of steel plates in the thickness direction. Specifically, the present invention relates to a transformer using an electromagnetic steel plate in a laminated body around which a coil for transforming is wound.
[0002]
[Prior art]
The transformer has a structure in which a plurality of steel plates are laminated and fixed in the thickness direction, and a coil is wound around them. Conventional transformers have been made by laminating non-oriented electrical steel sheets (NO) or directional electrical steel sheets (GO) in order to reduce iron loss.
As shown in FIG. 5 , a non-oriented electrical steel sheet is a steel sheet having a uniform relative permeability in any direction on the surface of the steel sheet, and is widely used as a material having a relatively small iron loss. Sufficient magnetic properties have not been obtained as a material used for transformers that operate continuously for hours.
[0003]
On the other hand, as shown in FIG. 6 , the grain-oriented electrical steel sheet is a steel sheet having excellent magnetic characteristics in a specific direction, and FIG. 2 shows the structure of a conventional transformer using the grain-oriented electrical steel sheet. The steel plate which comprises a transformer was divided | segmented like FIG. 2 , and it was set as the directional electrical steel plate which makes the direction shown by the arrow the easy magnetization direction. However, although the corner portion of the L-shaped steel plates the magnetic flux flows in two directions, it is necessary to align the easy magnetization direction of the grain-oriented electrical steel sheet on either one 1-way, the iron at the corner portion of the L-shaped There was a problem that the loss was large.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-described problems of the prior art, and to provide a transformer that has less iron loss and can reduce manufacturing costs.
[0005]
[Means for Solving the Problems]
The present invention, by using a bi-directional magnetic steel sheet in the steel sheet constituting the transformer, there is provided a transformers iron loss is not small and has as its gist the following content of as described in the appended claims There is .
A plurality of steel plates, a transformer be laminated and fixed in the thickness direction, becomes the linear portion of the steel plate from oriented electrical steel sheet, the corner portion of the L-shaped steel plate are two oriented electrical steel sheet A transformer characterized by comprising.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The embodiments of the present invention will be described in detail with reference to FIG.
Figure 1 is a diagram showing an implementation form of the transformer of the present invention. As shown in FIG. 1 , in this embodiment, the straight part of the steel plate which comprises a transformer consists of a directional electromagnetic steel plate, and the L-shaped corner part of a steel plate consists of a bidirectional magnetic steel plate. In FIG. 1 , the intersecting arrows indicate the easy magnetization direction of the bidirectional magnetic steel sheet, and the non-intersecting arrows indicate the easy magnetization direction of the directional electromagnetic steel sheet.
[0007]
The corner portion of the L-shaped steel flows flux of two directions, by using a bi-directional magnetic steel sheet in a corner portion of the L-shaped, to match the easy magnetization direction of the magnetic flux in the direction and the electromagnetic steel sheets Therefore, the iron loss can be remarkably reduced.
FIG. 3 is an explanatory diagram of the easy magnetization direction of the grain-oriented electrical steel sheet and the bidirectional magnetic steel sheet. In a grain-oriented electrical steel sheet, RD (Rolling Direction), which is a rolling direction, is an easy magnetization direction.
[0008]
On the other hand, a bi-directional electrical steel sheet is a steel sheet in which the rolling direction is set to two directions and the easy magnetization direction is set to two directions by performing necessary heat treatment. Usually, in addition to the rolling direction, A certain TD (Transverse Direction) is the direction of easy magnetization.
FIG. 4 is a diagram showing the magnetic properties of the grain-oriented electrical steel sheet and the bidirectional magnetic steel sheet. 4, the horizontal axis magnetic field H, the vertical axis represents relative permeability as an index of the magnetic properties of it steel magnetic flux density B is expressed as mu = B / H, which corresponds to the slope of the graph of FIG. The grain-oriented electrical steel sheet has good magnetic characteristics of θ = 0 (RD direction), and the bidirectional magnetic steel sheet has good magnetic characteristics of θ = 0 (RD direction) and θ = 90 (TD direction).
[0009]
FIG. 5 is a diagram showing the characteristic of relative permeability (μ) of the non-oriented electrical steel sheet. The non-oriented electrical steel sheet has the same magnetic characteristics in any direction, but the value of relative permeability (μ) is lower than that of the directional electrical steel sheet and the bidirectional magnetic steel sheet. FIG. 6 is a diagram showing the characteristic of relative permeability (μ) of the grain-oriented electrical steel sheet. The grain-oriented electrical steel sheet has a large value of relative permeability (μ R ) in the rolling direction, and the other directions are the same as the non-oriented electrical steel sheet. FIG. 7 is a diagram showing the characteristic of relative permeability (μ) of the bi-directional electrical steel sheet. The bi-directional electrical steel sheet has a large value of relative permeability (μ R ) in the rolling direction and relative permeability (μ T ) in the direction perpendicular to the rolling direction, and the other directions are the same as the non-oriented electrical steel sheet.
[0010]
【The invention's effect】
According to the present invention, by using a bi-directional magnetic steel sheet in a corner portion of the L-shaped steel plate constituting the transformers, it is possible to match the easy magnetization direction of the magnetic flux direction and the steel plate, the iron loss a easier to take out a three-phase alternating current can significantly reduce Runado exhibits the industrially useful remarkable effect.
[Brief description of the drawings ]
1 is a diagram showing an implementation form of the transformer of the present invention.
FIG. 2 is a diagram showing the structure of a conventional transformer.
FIG. 3 is an explanatory diagram of easy magnetization directions of grain-oriented electrical steel sheets and bi-directional electrical steel sheets.
FIG. 4 is a diagram showing the magnetic properties of grain-oriented electrical steel sheets and bi-directional electrical steel sheets.
FIG. 5 is a diagram showing the characteristic of relative permeability (μ) of a non-oriented electrical steel sheet.
FIG. 6 is a graph showing the characteristic of relative permeability (μ) of grain-oriented electrical steel sheet.
FIG. 7 is a graph showing the characteristic of relative permeability (μ) of a bi-directional electrical steel sheet.
[Explanation of symbols]
1: Steel plate 2: Straight line part 3: L-shaped corner
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002210326A JP3869768B2 (en) | 2002-07-19 | 2002-07-19 | Transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002210326A JP3869768B2 (en) | 2002-07-19 | 2002-07-19 | Transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004055773A JP2004055773A (en) | 2004-02-19 |
| JP3869768B2 true JP3869768B2 (en) | 2007-01-17 |
Family
ID=31933852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002210326A Expired - Lifetime JP3869768B2 (en) | 2002-07-19 | 2002-07-19 | Transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3869768B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006237030A (en) * | 2005-02-22 | 2006-09-07 | Sht Corp Ltd | Core and its production process |
| JP5418311B2 (en) * | 2009-03-23 | 2014-02-19 | 新日鐵住金株式会社 | Single-phase reactor core with gap |
| DE112010005642T5 (en) * | 2010-06-10 | 2013-03-21 | Schaffner Emv Ag | Magnetic interphase device for the removal of harmonics |
| DE102011014521A1 (en) * | 2011-03-18 | 2012-09-20 | Georg Duschl-Graw | Device for inductive transmission of electrical energy |
| JP5923908B2 (en) * | 2011-09-22 | 2016-05-25 | 富士電機株式会社 | Reactor |
| CN105304284A (en) * | 2015-09-23 | 2016-02-03 | 沈群华 | Powder transformer |
| CN105632732A (en) * | 2016-04-09 | 2016-06-01 | 高彰 | Star transformer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63114015U (en) * | 1987-01-19 | 1988-07-22 | ||
| JPH06251966A (en) * | 1993-02-23 | 1994-09-09 | Kawasaki Steel Corp | Three-phase laminated iron core transformer of low iron loss |
| JPH09232164A (en) * | 1996-02-22 | 1997-09-05 | Meidensha Corp | Triangularly arranged tripod-core type three-phase transformer |
| JP4092791B2 (en) * | 1998-10-06 | 2008-05-28 | 住友金属工業株式会社 | Low loss and low noise iron core and manufacturing method thereof |
| JP2001291608A (en) * | 2000-04-06 | 2001-10-19 | Nippon Steel Corp | Iron core for energy conversion equipment |
-
2002
- 2002-07-19 JP JP2002210326A patent/JP3869768B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004055773A (en) | 2004-02-19 |
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