JPS6394608A - Wound core for low iron-loss transformer - Google Patents
Wound core for low iron-loss transformerInfo
- Publication number
- JPS6394608A JPS6394608A JP61239371A JP23937186A JPS6394608A JP S6394608 A JPS6394608 A JP S6394608A JP 61239371 A JP61239371 A JP 61239371A JP 23937186 A JP23937186 A JP 23937186A JP S6394608 A JPS6394608 A JP S6394608A
- Authority
- JP
- Japan
- Prior art keywords
- core
- wound
- iron loss
- steel plate
- curvature
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000004804 winding Methods 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 83
- 229910052742 iron Inorganic materials 0.000 abstract description 33
- 238000005452 bending Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 10
- 238000000137 annealing Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 11
- 238000005096 rolling process Methods 0.000 description 11
- 230000004907 flux Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910000976 Electrical steel Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
柱上変圧器などの鉄心として用いられる鉄損の低い変圧
器用巻き鉄心の改良に関連する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to the improvement of a wound core for a transformer with low iron loss, which is used as the core of a pole-mounted transformer.
周知のように変圧器は、主に一方向性電磁鋼板を鉄心に
用いているが、その鉄心の構成によって積み変圧器と巻
き変圧器とに大別される。As is well known, transformers mainly use unidirectional electrical steel sheets for their cores, and are broadly classified into stacked transformers and wound transformers depending on the configuration of the core.
すなわち積み変圧器は所望の形状に切断した鋼板を積層
することによって鉄心が形成されたものであるのに対し
、巻き変圧器は所望の巾にスリットされた銅帯を巻き重
ねることにより鉄心が形成されたものである。In other words, a stacked transformer has an iron core formed by laminating steel plates cut into a desired shape, whereas a wound transformer has an iron core formed by stacking copper strips slit to the desired width. It is what was done.
所望の形状に切断した鋼板を1枚ずつ積層しなければな
らない積鉄心では鉄心の組立に大きな労力を必要とし、
また鉄心の接合部では磁束が圧延方向以外の方向に流れ
るため、鉄心としての特性は素材の特性よりも劣化する
傾向にある。これに対し、巻き鉄心では磁束はほとんど
圧延方向にしか通らないため、素材の特性がよく鉄心に
生かされる。Stacked cores require a lot of effort to assemble the core, which requires cutting steel plates into the desired shape and stacking them one by one.
Furthermore, since magnetic flux flows in a direction other than the rolling direction at the joints of the iron core, the characteristics of the iron core tend to deteriorate more than the characteristics of the material. On the other hand, in a wound core, almost all magnetic flux passes only in the rolling direction, so the characteristics of the material can be effectively utilized in the core.
したがって、柱上変圧器等比較的小型の変圧器では主と
して巻き鉄心が用いられている。Therefore, wound cores are mainly used in relatively small transformers such as pole transformers.
巻き鉄心は所定巾・長さにスリットした銅帯を所定厚み
に巻き重ねたのちプレス成形し、加工歪を除(ため70
0〜900℃で歪取り焼鈍し、そののち鉄心にコイルを
挿入して製造される。The wound core is made by rolling copper strips slit to a specified width and length to a specified thickness, then press-forming them to remove processing distortion (to remove 70%
It is manufactured by stress relief annealing at 0 to 900°C, and then inserting a coil into the iron core.
ところで変圧器鉄心用材料としては主として一方向性電
磁鋼板が用いられるが鉄心として使用した際のエネルギ
ー損失即ち鉄損が低いことが重要である。Incidentally, unidirectional electrical steel sheets are mainly used as materials for transformer cores, but it is important that energy loss, that is, iron loss, be low when used as the core.
近年のエネルギー事情の悪化から特に鉄損の低い電磁鋼
板に対する要求は一段と高まりつつある。Due to the deterioration of the energy situation in recent years, the demand for electrical steel sheets with particularly low iron loss is increasing further.
(従来の技術)
ところで鉄損を減少させるために、これまでに冶金学的
手段或いは人為的磁区細分化等種々の試みがなされた。(Prior Art) Various attempts have been made to reduce iron loss, including metallurgical means and artificial domain subdivision.
これらの方法の中で現在実用化され、極めて低鉄損が得
られる方法として仕上焼純情の方向性電磁鋼板にパルス
レーザ−光を照射する方法が特公昭57−2252号公
報に開示されている。Among these methods, Japanese Patent Publication No. Sho 57-2252 discloses a method of irradiating a finish-sintered grain-oriented electrical steel sheet with pulsed laser light, which is currently in practical use and provides extremely low iron loss. .
この方法により板厚0.3On+の鋼板の場合W 1?
150値で1.OOW/kg以下の低鉄損方向性電磁鋼
板の製造が可能となった。(ここでW 1?150値は
磁束密度1.7T、周波数50 Hzにおける鉄損であ
る。)ところが、この方法は歪取り焼鈍により鉄損の劣
化を来すという問題があり、巻鉄心用材料としては用い
られていない。Using this method, in the case of a steel plate with a thickness of 0.3 On+, W 1?
150 value is 1. It has become possible to manufacture grain-oriented electrical steel sheets with low core loss of OOW/kg or less. (Here, the W 1 - 150 value is the iron loss at a magnetic flux density of 1.7 T and a frequency of 50 Hz.) However, this method has the problem that iron loss deteriorates due to strain relief annealing, and the material for the wound core is It is not used as such.
これに対して発明者らは先に、特開昭59−19752
0号公報において最終仕上焼鈍工程より前に鋼板に線状
の溝を導入することにより高温での歪取り焼鈍後も鉄損
の劣化しない低鉄損一方向性電磁鋼板を製造する方法を
提案した。In contrast, the inventors previously proposed
In Publication No. 0, we proposed a method for producing a low core loss unidirectional electrical steel sheet that does not deteriorate in core loss even after strain relief annealing at high temperatures by introducing linear grooves into the steel sheet before the final finish annealing process. .
さらに、また、特開昭61−117218号公報では仕
上焼純情鋼板に溝を形成したのち750℃以上の温度で
熱処理する方法が開示されている。Furthermore, JP-A-61-117218 discloses a method in which grooves are formed in a finish-hardened pure steel sheet and then heat treated at a temperature of 750 DEG C. or higher.
これらの従来の技術は、溝の導入時期及び鉄損低減の原
理は異なるが、いずれも鋼板に溝を導入することにより
鉄損の減少をはかるものである。Although these conventional techniques differ in the timing of groove introduction and the principle of reducing iron loss, they all aim to reduce iron loss by introducing grooves into a steel plate.
溝の導入された鋼板を変圧器用巻き鉄心に応用する場合
、巻き方によっては素材の特性が十分鉄心に生かされな
いことを発明者らは知見し、先に特開昭61−1530
9号公報に開示した。即ち、片表面に線状の疵(溝)を
付けた一方向性電磁鋼板を線状疵(溝)が外巻き側とな
るように巻き重ねた変圧器用巻鉄心である。When applying a steel plate with grooves to a wound core for a transformer, the inventors found that depending on the winding method, the characteristics of the material could not be fully utilized in the core.
This was disclosed in Publication No. 9. That is, it is a wound core for a transformer, which is made by winding unidirectional electrical steel sheets with linear flaws (grooves) on one surface so that the linear flaws (grooves) are on the outer winding side.
(発明が解決しようとする問題点)
しかしながら、その後さらに調査を進めたところ、線状
疵(溝)を外巻き側とするよりむしろ内奏き側とした方
が良い場合があることが判明した。(Problem to be solved by the invention) However, further investigation revealed that there are cases in which it is better to place the linear flaws (grooves) on the inward side rather than on the outward side. .
発明者らはこのような現象が何に起因して生ずるのかを
鋭意実験、検討を重ねた結果、鉄心最内側の曲げ加工部
の曲げ径がある一定値よりも小さい場合には線状の溝を
内奏き側となるように巻いた方が良いことを新たに知見
し、この発明を成すにいたったのである。The inventors conducted extensive experiments and studies to find out what causes this phenomenon, and found that if the bending diameter of the innermost bending part of the core is smaller than a certain value, a linear groove is formed. He discovered that it is better to wind the winding so that it is on the inner playing side, which led him to create this invention.
(問題点を解決するための手段)
この発明は片表面に線状の溝を形成した一方向性電磁鋼
板を巻き重ねて成る巻き鉄心にして、該線状の溝が内奏
き側に面し、かつ最内側の曲げ加工部の曲率半径が30
寵以下であることを特徴とする鉄損の低い変圧器用巻き
鉄心である。(Means for Solving the Problems) This invention provides a wound core made by winding unidirectional electrical steel sheets with linear grooves formed on one surface, so that the linear grooves face the inner side. and the radius of curvature of the innermost bent part is 30
This is a wound core for transformers with a low iron loss.
以下この発明について具体的に説明する。This invention will be explained in detail below.
通常の製法により製造した板厚0.23mmの方向性電
磁鋼板を第1図に示すような種々の曲率半径(R)をも
つ型枠に巻きつけることにより鉄心最内側の曲げ加工部
の曲率半径が異なる巻鉄心(A)を作成した。The radius of curvature of the innermost bending part of the core is determined by winding a grain-oriented electrical steel sheet with a thickness of 0.23 mm manufactured using a conventional manufacturing method around formworks having various radii of curvature (R) as shown in Figure 1. A wound core (A) with different values was created.
また、(A)と同一組成でありかつ、片表面に圧延方向
とほぼ直角方向に巾100μm1深さ15μm、圧延方
向の間隔7龍にて線状の漢を付した板rg−O。Also, a plate rg-O which has the same composition as (A) and has a linear hook on one surface in a direction substantially perpendicular to the rolling direction, having a width of 100 μm and a depth of 15 μm, and an interval of 7 dragons in the rolling direction.
231mmの方向性電磁鋼板を(A)と同様の型枠に線
状の溝が外巻となるように巻いた鉄心(B)、ならびに
線状の溝が内奏となるように巻いた鉄心(c)を作成し
た。An iron core (B) is made by winding a 231 mm grain-oriented electrical steel sheet in a formwork similar to (A) so that the linear grooves are on the outer side, and an iron core (B) is wound so that the linear grooves are on the inner side. c) was created.
巻き厚はいずれの鉄心も、40mとした。また素材特性
は線状の溝を有しない鋼板が81゜値1.92T、W
1?150値0.90W/kgであり、綿状の溝を付し
た鋼板はB111値1.91T、 W1?150値0.
81W/ kgであり、線状の溝を付した鋼板の方が同
一組成であっても低鉄損値を示す。The winding thickness of both cores was 40 m. In addition, the material properties of the steel plate without linear grooves are 81° value 1.92T, W
1?150 value is 0.90W/kg, and the steel plate with cotton grooves has a B111 value of 1.91T and a W1?150 value of 0.
81 W/kg, and the steel plate with linear grooves shows a lower iron loss value even if the composition is the same.
ここでB、。値とは磁化力1000 A/n+における
磁束密度であり、W17150値についてはすでに述べ
た。Here B. The value is the magnetic flux density at a magnetizing force of 1000 A/n+, and the W17150 value has already been described.
次に上記の鉄心を加工歪を除くため800℃×2hrs
% Nz中の歪除去焼鈍を実施したのち、巻線を施し
、磁気特性を測定した。Next, the above iron core was heated to 800°C x 2hrs to remove processing distortion.
% Nz, and then winding was performed and the magnetic properties were measured.
第2図に鉄心最内側の曲げ加工部曲率半径と巻鉄心の鉄
損の関係を示す。Figure 2 shows the relationship between the radius of curvature of the innermost bent portion of the core and the core loss of the wound core.
第2図より線状の溝を有する鋼板を用いた鉄心(B)
(C)はいずれも溝のない通常の鋼板を用いた鉄心(A
)よりも鉄損が低く、線状の溝導入による素材の鉄損改
善効果がよく鉄心に反映されている。From Figure 2, iron core using a steel plate with linear grooves (B)
(C) are iron cores made of ordinary steel plates without grooves (A
), and the iron loss improvement effect of the material by introducing linear grooves is well reflected in the iron core.
一方、(B) (C)の間で比較すると曲げ加工部の曲
率半径が301農を越えて大きい場合には線状の溝が外
巻となるように巻いた鉄心(B)の方が内巻となるよう
に巻いた鉄心(C)よりも低鉄損であるが、曲げ加工部
曲率半径が3Qmm以下の場合には内巻(C)の方が低
鉄損となる。On the other hand, when comparing between (B) and (C), if the radius of curvature of the bent part is larger than 301 mm, the core (B) wound so that the linear grooves are wound on the outside is better. Although the iron loss is lower than that of the iron core (C) wound as a winding, when the radius of curvature of the bent portion is 3Q mm or less, the inner winding (C) has a lower iron loss.
したがって鉄心最内側の曲げ加工部が曲率半径30m以
下の加工径で曲げられた変圧器用巻鉄心においては、片
表面に線状の溝を有する一方向性電磁鋼板を線状の溝が
内巻き側となるように巻き重ねることにより、これまで
になく鉄損の低い変圧器用巻き鉄心の製造が可能となっ
たのである。Therefore, in a wound core for a transformer in which the innermost bending part of the core is bent with a radius of curvature of 30 m or less, a unidirectional electrical steel sheet having a linear groove on one surface is used, and the linear groove is on the inner winding side. By winding the core in such a way, it became possible to manufacture a wound core for transformers with the lowest iron loss ever.
(作 用)
曲げ加工部曲率半径が小さい場合に線状の溝を内巻きに
巻き重ねた方が低鉄損となり、曲げ加工部曲率半径が大
きい場合には線状の溝を外巻きに巻き重ねた方が低鉄損
となる理由は次のように推測される。(Function) When the radius of curvature of the bent part is small, it is better to wrap the linear groove inwardly to reduce core loss, and when the radius of curvature of the bent part is large, it is better to wrap the linear groove outwardly. The reason why the iron loss is lower when stacked is assumed to be as follows.
曲げ加工部曲率半径が大きく、溝内奏の場合、磁束は溝
の周辺で隣接する鋼板に渡るため板厚方向の磁束が生じ
鉄損は劣化する。ところが溝外巻の場合、曲げ加工部で
は溝は広がるため板厚方向の磁束が生ずる割合は内巻の
場合に比べて小さい。If the radius of curvature of the bending part is large and the groove is internal, the magnetic flux will pass to the adjacent steel plate around the groove, so magnetic flux will occur in the plate thickness direction and the iron loss will deteriorate. However, in the case of outer groove winding, the groove widens at the bent portion, so the rate of magnetic flux generated in the plate thickness direction is smaller than in the case of inner winding.
一方、曲げ加工部曲率半径が小さい場合には溝内奏のと
き、溝はせまくなるため磁束の流れは内巻、外巻ともに
ほぼ同等となると考えられる。On the other hand, when the radius of curvature of the bent portion is small, the groove becomes narrower when the groove is wound internally, so that the flow of magnetic flux is considered to be approximately the same for both the internal and external windings.
ところが、巻鉄心の曲げ加工部では通常、外面には引張
応力、内面には圧縮応力が加わるが、内面に溝がある場
合、その圧縮応力が緩和され、したがって、溝外巻の場
合よりも低鉄損になるものと推察される。However, in the bending part of a wound core, tensile stress is usually applied to the outer surface and compressive stress is applied to the inner surface, but if there is a groove on the inner surface, the compressive stress is relaxed, and therefore the stress is lower than in the case of outer groove winding. It is presumed that this will result in iron loss.
第2図において曲げ加工部曲率半径が小さい場合の方が
低鉄損となるのは曲げ加工部曲率半径が大きい場合には
曲げ加工による歪が加わる部分の比率が大きく、これが
鉄損を劣化させる原因となることによるものと考えられ
る。In Figure 2, the reason why the iron loss is lower when the radius of curvature of the bent part is small is that when the radius of curvature of the bent part is large, the proportion of the part that is subjected to strain due to bending is large, and this deteriorates the iron loss. This is thought to be due to the cause.
次に本発明の変圧器用巻鉄心に供する材料が具備すべき
線状の溝の形状については、特開昭59−197520
号公報に示した通り、巾300μm以下、深さ100μ
m以下、圧延方向における溝中心線間間隔1 xvr以
上とし、圧延方向にほぼ直角な方向とするのが好ましく
、各範囲を逸れるときには素材の鉄損低減の効果が十分
に得られない。とくに、線状の溝の中30〜150μm
、深さ10〜30μm、圧延方向の間隔3〜20mm、
圧延方向との角度30°以上の場合にW17150値で
0.05W/kg以上の大きな鉄損低減効果がある。Next, regarding the shape of the linear groove that should be provided in the material used in the wound core for a transformer of the present invention, please refer to Japanese Patent Application Laid-Open No. 59-197520.
As shown in the publication, width 300μm or less, depth 100μm
It is preferable that the distance between the groove center lines in the rolling direction be 1 xvr or more, and be in a direction substantially perpendicular to the rolling direction.If the distance is outside of each range, the effect of reducing iron loss of the material will not be sufficiently obtained. In particular, 30 to 150 μm inside the linear groove.
, depth 10 to 30 μm, spacing in the rolling direction 3 to 20 mm,
When the angle with the rolling direction is 30° or more, there is a large iron loss reduction effect of 0.05 W/kg or more in W17150 value.
また溝は線状とすることが必要で、線状の形は直線、曲
線、波線、破線、点線のいずれであってもかまわない。Further, the groove must be linear, and the linear shape may be a straight line, a curved line, a wavy line, a broken line, or a dotted line.
さらに、鋼板はりん酸塩系の上塗りコーティングが施さ
れていてもいなくてもかまわない。Furthermore, the steel plate may be provided with or without a phosphate-based top coating.
(実施例) 次にこの発明の実施例について説明する。(Example) Next, embodiments of the invention will be described.
1、 0.2:3++m厚みに圧延した7種類の含けい
素鋼冷延板に巾100μm、深さ12μmの線状の溝を
圧延方向に直角な方向に8mm間隔で導入し、残り半分
はそのまま通常の製造工程により製品とした。このとき
、溝のある鋼板の磁気特性はB1゜値1.91T、 W
1?150値0.78W/kgであり溝のない鋼板は1
3to値1.92T、 W17150値0.89W/k
gであった。1. Linear grooves with a width of 100 μm and a depth of 12 μm were introduced at 8 mm intervals in a direction perpendicular to the rolling direction into seven types of cold-rolled silicon-containing steel plates rolled to a thickness of 0.2:3++ m, and the remaining half The product was made into a product using the normal manufacturing process. At this time, the magnetic properties of the grooved steel plate are B1° value 1.91T, W
1?150 value is 0.78W/kg and the steel plate without groove is 1
3to value 1.92T, W17150 value 0.89W/k
It was g.
次にこの鋼板を線状の溝を導入したものとしないものに
2分割し、それぞれを10on巾の銅帯にスリットし、
これを巻き厚40龍になるまで巻き取ったのちプレス成
形した。この時、鉄心最内側の曲げ加工部曲率半径が表
1に示す種々の径となるように調整し、また、線状の溝
を有する鋼板については鉄心巻き方は線状の溝が内巻き
の場合、外巻きの場合の2通りとした。Next, this steel plate was divided into two, one with linear grooves and one without, and each was slit into a 10-inch wide copper strip.
This was rolled up to a thickness of 40 mm and then press-molded. At this time, adjust the radius of curvature of the innermost bending part of the core to be the various diameters shown in Table 1. Also, for steel plates with linear grooves, the core winding method is such that the linear grooves are inwardly wound. In this case, there were two cases: externally wound.
更に、これらの鉄心は加工歪を除くために820℃X
2hrs、 N、中で歪取り焼鈍した。Furthermore, these cores were heated to 820°C to remove processing strain.
Strain relief annealing was performed in N for 2 hrs.
この時の鉄心の鉄損特性を、線状の溝のない鋼板を使用
した場合と比較して表1に示す。曲げ加工部曲率半径は
鉄心最内側の曲げ加工部曲率半径を示す。The iron loss characteristics of the core at this time are shown in Table 1 in comparison with the case where a steel plate without linear grooves is used. The radius of curvature of the bent portion indicates the radius of curvature of the innermost bent portion of the core.
表 1
表1に示した通り、線状の溝を導入した鋼板を用いた巻
鉄心はいずれの曲げ加工部曲率半径においても溝のない
鋼板を用いた巻鉄心よりも低鉄損を呈するが、鉄心最内
側の曲げ加工部が曲率半径30mm以下の巻鉄心におい
ては線状の溝が内巻き側になるように巻き重ねることに
より、素材の著しい鉄損低減効果が鉄心に十分反映され
、より低鉄損の巻鉄心の製造が可能となった。Table 1 As shown in Table 1, the wound core using a steel plate with linear grooves exhibits lower core loss than the wound core using a steel plate without grooves at any bending radius of curvature. For wound cores in which the innermost bending part has a radius of curvature of 30 mm or less, by wrapping the core so that the linear grooves are on the inward winding side, the significant iron loss reduction effect of the material is fully reflected in the core, resulting in even lower core losses. It became possible to manufacture wound cores with low iron loss.
2、 0.30mm厚みの仕上焼純情一方向性電磁鋼板
コイルに、半分は中120μm1深さ15μmの線状の
溝を圧延方向と直角な方向に511間隔で導入したのち
このコイルを線状の溝を導入したものとしないものに2
分割した。このとき溝を導入した鋼板の磁気特性はB1
゜値、1.91T、 W17150値0.92W/kg
であり、溝のない鋼板はB10値、1.92T、 W1
7150値1.03W/kgであった。2. Linear grooves of 120 μm in diameter and 15 μm in depth were introduced into a 0.30 mm thick finish-hardened unidirectional magnetic steel sheet coil in the direction perpendicular to the rolling direction, and then this coil was 2 with and without grooves
Divided. At this time, the magnetic properties of the steel plate with grooves introduced are B1
° value, 1.91T, W17150 value 0.92W/kg
The steel plate without grooves has B10 value, 1.92T, W1
7150 value was 1.03 W/kg.
次にそれぞれの分割コイルを100 *m巾の銅帯にス
リットし、これを巻き厚401重になるまで巻き取った
のちプレス成形した。この時、鉄心最内側の曲げ加工部
曲率半径が表2に示す種々の径となるように調整し、ま
た、綿状の溝を有する鋼板については鉄心の巻き方は線
状の溝が内巻きの場合、外巻きの場合の2通りとした。Next, each split coil was slit into a 100*m wide copper strip, which was wound up to a thickness of 401 layers and then press-molded. At this time, adjust the radius of curvature of the innermost bending part of the core to the various diameters shown in Table 2. Also, for steel plates with cotton-like grooves, the method of winding the core is such that the linear grooves are wound inward. In the case of , there were two cases: external winding.
更に、これらの鉄心は加工歪を除くために850°CX
2hrs 、 N、中で歪取り焼鈍した。Furthermore, these cores were heated at 850°CX to remove processing distortion.
Strain relief annealing was performed in N for 2 hrs.
この時の鉄心の鉄損特性を線状の溝のない鋼板を使用し
た場合と比較して表2に示す。曲げ加工部曲率半径は鉄
心最内側の曲げ加工部曲率半径を示す。Table 2 shows the iron loss characteristics of the core in this case in comparison with the case where a steel plate without linear grooves was used. The radius of curvature of the bent portion indicates the radius of curvature of the innermost bent portion of the core.
表2
表2に示した通り、線状の溝を導入した鋼板を用いた巻
鉄心はいずれの曲げ加工部曲率半径においても溝のない
鋼板を用いた巻鉄心よりも低鉄損を示したが、鉄心最内
側の曲げ加工部が曲率半径30龍以下の巻鉄心において
線状の溝が内巻き側となるように巻き重ねることにより
素材の著るしい鉄損低減効果が鉄心に十分反映され、よ
り低鉄…の巻鉄心の製造が可能となった。Table 2 As shown in Table 2, the wound core using a steel plate with linear grooves showed lower core loss than the wound core using a steel plate without grooves at any bending radius of curvature. By winding the core so that the linear groove is on the inward winding side in a wound core where the innermost bent part has a radius of curvature of 30 dragons or less, the remarkable iron loss reduction effect of the material is fully reflected in the core. It has become possible to manufacture wound cores with lower iron content.
(発明の効果)
この発明により著るしく低鉄損の変圧器用巻き鉄心の製
造が可能となり、省エネルギーに寄与できる。(Effects of the Invention) This invention makes it possible to manufacture a wound core for a transformer with significantly low iron loss, contributing to energy saving.
第1図は巻鉄心を作る型枠を示す説明図、第2図は巻鉄
心の鉄心最内側の曲げ加工部曲率半径と巻鉄心の鉄損W
1?150 (W/kg)の関係を示す比較図である
。Figure 1 is an explanatory diagram showing the formwork for making the core, and Figure 2 is the radius of curvature of the innermost bent part of the core and the iron loss W of the core.
It is a comparative diagram showing the relationship between 1 and 150 (W/kg).
Claims (1)
き重ねて成る巻き鉄心にして、該線状の溝が内巻き側に
面し、かつ最内側の曲げ加工部の曲率半径が30mm以
下であることを特徴とする鉄損の低い変圧器用巻き鉄心
。1. The core is made by winding unidirectional electromagnetic steel sheets with linear grooves formed on one surface, and the linear grooves face the inward winding side, and the radius of curvature of the innermost bent part A wound core for a transformer with low core loss, characterized in that the core is 30 mm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61239371A JPH0622179B2 (en) | 1986-10-09 | 1986-10-09 | Winding iron core for transformer with low iron loss |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61239371A JPH0622179B2 (en) | 1986-10-09 | 1986-10-09 | Winding iron core for transformer with low iron loss |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6394608A true JPS6394608A (en) | 1988-04-25 |
JPH0622179B2 JPH0622179B2 (en) | 1994-03-23 |
Family
ID=17043774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61239371A Expired - Fee Related JPH0622179B2 (en) | 1986-10-09 | 1986-10-09 | Winding iron core for transformer with low iron loss |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0622179B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0357357A1 (en) * | 1988-08-29 | 1990-03-07 | General Electric Company | Core and coil assembly for a transformer having an amorphous steel core and method of making said assembly |
JP2011233731A (en) * | 2010-04-28 | 2011-11-17 | Nissan Motor Co Ltd | Non-oriented magnetic steel sheet, laminate of non-oriented magnetic steel sheet, and stator core of electric motor made of the laminate |
JP2017157806A (en) * | 2016-03-04 | 2017-09-07 | 新日鐵住金株式会社 | Wound core and method of manufacturing wound core |
JP2018148036A (en) * | 2017-03-06 | 2018-09-20 | 新日鐵住金株式会社 | Wound core |
JP2019024039A (en) * | 2017-07-24 | 2019-02-14 | 新日鐵住金株式会社 | Wound iron core |
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EP2915889B1 (en) | 2012-10-30 | 2019-06-19 | JFE Steel Corporation | Method of manufacturing grain-oriented electrical steel sheet exhibiting low iron loss |
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US20240233991A1 (en) | 2021-05-31 | 2024-07-11 | Jfe Steel Corporation | Grain-oriented electrical steel sheet |
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-
1986
- 1986-10-09 JP JP61239371A patent/JPH0622179B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0357357A1 (en) * | 1988-08-29 | 1990-03-07 | General Electric Company | Core and coil assembly for a transformer having an amorphous steel core and method of making said assembly |
JP2011233731A (en) * | 2010-04-28 | 2011-11-17 | Nissan Motor Co Ltd | Non-oriented magnetic steel sheet, laminate of non-oriented magnetic steel sheet, and stator core of electric motor made of the laminate |
JP2017157806A (en) * | 2016-03-04 | 2017-09-07 | 新日鐵住金株式会社 | Wound core and method of manufacturing wound core |
JP2018148036A (en) * | 2017-03-06 | 2018-09-20 | 新日鐵住金株式会社 | Wound core |
JP2019024039A (en) * | 2017-07-24 | 2019-02-14 | 新日鐵住金株式会社 | Wound iron core |
Also Published As
Publication number | Publication date |
---|---|
JPH0622179B2 (en) | 1994-03-23 |
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