JP2001244126A - Static induction electrical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a static induction electrical apparatus in which the height of winding does not increase, even if a shield is applied for insulation at the end part of the winding, incapable of triple junction causing concentration of field, and manufacturing cost is reduced. SOLUTION: A shield 8 is applied to a disc coil 4a at the endmost part, a space part 8x is formed between the side face part 8b and a linear spacer 15, an oil gap 8f is formed by bringing a protrusion 8e at the side face part 8b into contact with the linear spacer 15 to close a part of the space part 8x, and concentration of field is relaxed by separating the oil gap 8f from a curved part 8c, where the field is concentrated the most.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、特に巻線端部絶縁
構造を改良した静止誘導電器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction device with an improved winding end insulation structure.

【０００２】[0002]

【従来の技術】一般に変圧器、リアクトル等の静止誘導
電器の一部を構成する円板コイルは、絶縁筒の間にコイ
ル状に巻回した電線の複数個を配置して形成されてい
る。巻線を構成する電線は断面が矩形形状である。この
電線の端部は角張っている。そのため、円板コイルの端
部も角張っており、この端部の角部に電界が集中して絶
縁耐力が低くなる。そこで、従来は角部に丸みを付けた
シールドを巻線端部に配置して巻線端部における電界の
集中を緩和し、絶縁耐力の向上を図ってきた。2. Description of the Related Art Generally, a disc coil constituting a part of a stationary induction device such as a transformer or a reactor is formed by arranging a plurality of electric wires wound in a coil shape between insulating cylinders. The electric wire constituting the winding has a rectangular cross section. The ends of the wires are angular. Therefore, the end of the disc coil is also angular, and the electric field is concentrated on the corner of this end, so that the dielectric strength is reduced. Therefore, conventionally, a shield having a rounded corner is disposed at the end of the winding to reduce the concentration of the electric field at the end of the winding, thereby improving the dielectric strength.

【０００３】近年、絶縁研究が進み、このような巻線端
部構造における絶縁状の弱点がシールドと、それに接す
る巻線を支持するための巻線支持絶縁材との間のくさび
状の油間隙にあることが分かってきた。この部分では巻
線を支持する支持絶縁材、シールドの絶縁被覆及び油の
三者が接しており、巻線支持絶縁材やシールドの絶縁被
覆の誘電率に比べて油の誘電率が小さいため、油に電界
が集中する所謂トリプルジャンクションを形成している
ため、及び油の絶縁強度が巻線支持絶縁材や絶縁被覆の
絶縁強度よりも遥かに小さいためである。In recent years, research on insulation has progressed, and an insulating weak point in such a winding end structure is a wedge-shaped oil gap between a shield and a winding supporting insulating material for supporting a winding in contact therewith. Has been found to be. In this part, the support insulating material that supports the winding, the insulating coating of the shield, and the oil are in contact, and the dielectric constant of the oil is smaller than the dielectric constant of the insulating material of the winding supporting insulating material and the shield, This is because a so-called triple junction in which an electric field is concentrated on the oil is formed, and the insulating strength of the oil is much smaller than the insulating strength of the winding supporting insulating material and the insulating coating.

【０００４】それを改良したものとして、例えば特開平
８−３７１１６号公報に記載されているように、シール
ドの表面にエラストマ絶縁物を密着させてシールドと巻
線支持絶縁物との間にできるくさび状の油間隙の電界を
緩和し、巻線端部の絶縁耐力の向上を図ったものや、特
開平６−２６７７６１号公報に記載されているように、
シールドの側面にエラストマ絶縁物を取付けて直線スペ
ーサとの間のくさび状の油間隙をなくし、巻線端部の絶
縁耐力の向上を図ったものがある。As an improvement, as described in, for example, JP-A-8-37116, a wedge formed between a shield and a winding supporting insulator by bringing an elastomer insulator into close contact with the surface of a shield. As described in Japanese Patent Application Laid-Open No. 6-267661, the one in which the electric field in the oil gap is relaxed and the dielectric strength of the winding end is improved.
There is a method in which an elastomer insulator is attached to the side surface of the shield to eliminate a wedge-shaped oil gap between the shield and the linear spacer, thereby improving the dielectric strength at the winding end.

【０００５】[0005]

【発明が解決しようとする課題】特開平８−３７１１６
号公報に記載の構造の場合、シールドの厚さの分だけ巻
線の高さが増えるという問題がある。また、特開平６−
２６７７６１号公報に記載の構造の場合、最端部の円板
コイルのかなりの部分がシールドで占められてシールド
を側面に配置した効果が小さく、上記の場合と同様にシ
ールドの厚さに近い分巻線の高さが増えるという問題が
ある。両者ともシールド部材の角部を丸めるために機械
加工したり、テープ巻で分厚く絶縁被覆したり、トリプ
ルジャンクションができないようにエラストマ絶縁体を
取付けるなどの作業があり、製作コストが掛かるという
問題もある。Problems to be Solved by the Invention Japanese Patent Laid-Open No. 8-37116
In the case of the structure described in Japanese Patent Application Laid-Open Publication No. H10-209, there is a problem that the height of the winding is increased by the thickness of the shield. In addition, Japanese Unexamined Patent Publication No.
In the case of the structure described in Japanese Patent No. 267761, a considerable portion of the endmost disk coil is occupied by the shield, and the effect of disposing the shield on the side surface is small. There is a problem that the height of the winding increases. In both cases, there are operations such as machining to round the corners of the shield member, thickly insulating coating with tape winding, and attaching an elastomer insulator so that triple junctions cannot be performed. .

【０００６】本発明の目的は、シールドを配置しても円
板コイルの高さを増すことがない小型化された静止誘導
電器を提供することにある。It is an object of the present invention to provide a miniaturized static induction device which does not increase the height of a disk coil even when a shield is arranged.

【０００７】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明では、シルードは導電性部材からなる薄板と
これを絶縁被覆で被覆したシルード板により形成し、こ
のシルード板の両端部を円板コイル側に折り曲げ、一方
向に伸びる側面部と、折り曲げ部に所定の曲率でなる曲
面部とからなるＵ字型形状のシルードを形成し、上記側
面部の端部を直線スペーサ側に傾斜するようになし、こ
のシルードを端部の円板コイルに被せることを特徴とす
る。In order to achieve the above object, according to the present invention, the shield is formed by a thin plate made of a conductive member and a shield that is coated with an insulating coating. A U-shaped sillud is formed by bending the disk coil side and extending in one direction and a curved surface having a predetermined curvature at the bent portion. The end of the side surface is inclined toward the linear spacer. The feature is that this shield is put on the disk coil at the end.

【０００８】[0008]

【発明の実施の形態】以下、本発明の一実施例を図１な
いし図４により説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

【０００９】該図に示す本実施例では、導体１に絶縁被
覆２を施した電線３を円形に複数回巻いて円板コイル４
ａ，４ｂ，４ｃを形成する。各円板コイル４ａ，４ｂ，
４ｃを絶縁筒１４の軸方向に積み重ね、各円板コイル４
ａと円板コイル４ｂの間にコイル間スペーサ５を交互に
複数段積重ねて円板巻線４を構成している。円板巻線４
は絶縁筒１４の間に配置され、円板巻線４と絶縁筒１４
の間に周方向に沿って複数本の直線スペーサ１５を配置
している。絶縁筒１４の内周側には図示していないが鉄
心が配置されている。最端部の円板コイル４ａはシール
ド８により覆われている。また図示しないがシールド８
と最端部の円板コイル４ａを導線で接続し同電位にして
いる。In this embodiment shown in FIG. 1, a wire 3 having a conductor 1 coated with an insulating coating 2 is wound a plurality of times in a circular shape to form a disc coil 4.
a, 4b and 4c are formed. Each disk coil 4a, 4b,
4c are stacked in the axial direction of the insulating tube 14, and each disk coil 4
The disk windings 4 are formed by alternately stacking a plurality of inter-coil spacers 5 between a and the disk coil 4b. Disc winding 4
Is disposed between the insulating cylinders 14, and the disk winding 4 and the insulating cylinder 14
A plurality of linear spacers 15 are arranged along the circumferential direction. Although not shown, an iron core is arranged on the inner peripheral side of the insulating cylinder 14. The endmost disk coil 4 a is covered with a shield 8. Although not shown, the shield 8
And the endmost disk coil 4a are connected by a conducting wire to have the same potential.

【００１０】シールド８は導電性部材かなる薄板６に絶
縁被覆７を施したシルード板８ａを形成している。シル
ード板８ａの両端部を折り曲げると共に、側面部８ｂが
一方向に伸びている。折り曲げ部には所定の曲率でなる
曲面部８ｃを形成している。側面部８ｂの内側に開放口
８ｄを形成している。、開放口８ｄと反対側の側面部８
ｂの端部８ｅを直線スペーサ側に末広がりに傾斜するよ
うに形成し断面形状がＵ字型形状のシルード８を形成し
ている。側面部８ｂは円板コイル４ａと直線スペーサ１
５の間に配置されている。図３に示すように、側面部８
ｂと直線スペーサ１５の間に空間部８ｘを形成すると共
に、端部８ｅを直線スペーサ１５に接触して空間部８ｘ
の一部を塞いだ断面形状が三角形状のくさび型の油間隙
８ｆを形成している。The shield 8 is formed as a shield 8a in which an insulating coating 7 is applied to a thin plate 6 made of a conductive material. Both ends of the shield plate 8a are bent, and side surfaces 8b extend in one direction. A curved surface portion 8c having a predetermined curvature is formed in the bent portion. An opening 8d is formed inside the side surface 8b. , The side portion 8 opposite to the opening 8d
The end 8e of b is formed so as to be inclined toward the linear spacer side so as to expand toward the end, forming a U-shaped cross section. The side surface portion 8b includes the disk coil 4a and the linear spacer 1
5 are arranged. As shown in FIG.
b and the linear spacer 15 to form a space 8x, and the end 8e contacts the linear spacer 15 to form the space 8x.
Are formed to form a wedge-shaped oil gap 8f having a triangular cross-section.

【００１１】詳細には、シールド８の両端部の数ｍｍを
内側に１８０度折り曲げ、角部近傍を丸みを帯びた曲率
でなる曲面部８ｃを形成し、曲面部８ｃの下端と連続し
ている側面部８ｂを円板コイル４ａ側に少し引込ませ、
円板コイル４ａと直線スペーサ１５の間に空間部８ｘを
形成し、端部８ｅの数ｍｍを直線スペーサ１５側に接触
させ空間部８ｘの一部を塞ぎ油間隙８ｆを形成する。更
に、図４に示したように、シールド板８ａの頂部には穴
９を開けておく。More specifically, several millimeters at both ends of the shield 8 are bent inward by 180 degrees to form a curved surface portion 8c having a rounded curvature near a corner portion, which is continuous with the lower end of the curved surface portion 8c. The side part 8b is slightly drawn into the disk coil 4a side,
A space 8x is formed between the disc coil 4a and the linear spacer 15, and several mm of the end 8e is brought into contact with the linear spacer 15 to partially close the space 8x to form an oil gap 8f. Further, as shown in FIG. 4, a hole 9 is formed at the top of the shield plate 8a.

【００１２】このように最端部の円板コイル４ａの上に
スペーサ１０を配置し、シルード８の開放口８ｄを円板
コイル４ａと直線スペーサ１５の間に挿入し、シルード
８をスペーサ１０及び円板コイル４ａを被せ、シルード
８の上にスペーサ１２、支持絶縁物１３を配置し、これ
らを絶縁筒内に挿入し、円板コイル４ａに隣接するスペ
ーサ１０と直線スペーサ１５の間に側面部８ｂを配置
し、側面部８ｂは一部がスペーサ１０に接触している。
絶縁筒１４とこの内部に配置された円板巻線４等の中身
を図示しない油の中に浸して油入の静止誘導電器１６が
構成される。またシルード８を直接円板コイル４ａに被
せてもよい。As described above, the spacer 10 is arranged on the endmost disk coil 4a, the opening 8d of the shield 8 is inserted between the disk coil 4a and the linear spacer 15, and the shield 8 is inserted into the spacer 10 and the linear spacer 15. The disk coil 4a is covered, the spacer 12 and the supporting insulator 13 are arranged on the shield 8, and these are inserted into the insulating cylinder, and the side portion between the spacer 10 and the linear spacer 15 adjacent to the disk coil 4a is inserted. 8b is arranged, and a part of the side surface portion 8b is in contact with the spacer 10.
The insulating cylinder 14 and the contents of the disk winding 4 and the like disposed inside the insulating cylinder 14 are immersed in oil (not shown) to form an oil-filled stationary induction device 16. Further, the shield 8 may be directly put on the disk coil 4a.

【００１３】この実施例によれば、薄板のシルード板８
ａを成形加工し、所定形状のシルード８を容易に製作す
ることができる。また電界集中の一番厳しい曲面部８ｃ
より離して油間隙８ｆを形成したので、油間隙８ｆでの
電界集中は緩和される。電界集中が緩和されたぶん絶縁
被覆７を薄くできる。この結果、導電部材からなる薄板
６に絶縁被覆７を施したシルード板８ａを成形加工し、
所定形状のシルード８を容易に作製できる。このシルー
ド８を最端部の円板コイル４ａに配置しても、円板巻線
４の厚さが数ｍｍしかならず、従来のシルードを使用し
たのに比べて円板巻線４の高さが縮小出来るようにな
り、静止誘導電器１６を小型化できる。According to this embodiment, the thin silled plate 8
a can be easily formed to form a shield 8 having a predetermined shape. In addition, curved surface portion 8c where electric field concentration is the most severe
Since the oil gap 8f is formed further apart, the electric field concentration in the oil gap 8f is reduced. The insulating coating 7 can be made thinner as electric field concentration is eased. As a result, a thin plate 8a in which an insulating coating 7 is applied to a thin plate 6 made of a conductive member is formed and processed.
The shield 8 having a predetermined shape can be easily manufactured. Even if this shield 8 is arranged on the endmost disk coil 4a, the thickness of the disk winding 4 is only several millimeters, and the height of the disk winding 4 is higher than that of a conventional shield. Can be reduced, and the stationary induction device 16 can be downsized.

【００１４】その結果、従来のシールドは電界集中の一
番厳しい曲面部に油間隙を形成したので、絶縁被覆の厚
さが例えば３０ｍｍ程度あったに対して、本発明では油
間隙８ｆでの電界集中を緩和したぶんだけ絶縁被覆７を
薄くできるので、円板巻線４の高さを低減し、円板巻線
４を小型化できる。また電界集中が緩和されたぶん絶縁
被覆７を薄くできるので、導電性部材かなる薄板６に絶
縁被覆７を施した薄板状のシルード板８ａを成形加工す
る場合、所定形状のシルード８を容易に製作することが
できる。As a result, the conventional shield has an oil gap formed on the curved surface where electric field concentration is most severe, so that the thickness of the insulating coating is, for example, about 30 mm, whereas the present invention provides an electric field in the oil gap 8f. Since the insulating coating 7 can be made thinner as much as the concentration is reduced, the height of the disk winding 4 can be reduced, and the disk winding 4 can be downsized. In addition, since the insulating coating 7 can be made thinner by alleviating the electric field concentration, when forming a thin sheet-like plate 8a in which the insulating coating 7 is applied to the thin plate 6 made of a conductive member, the predetermined shape of the shield 8 can be easily manufactured. can do.

【００１５】尚、実機では、円板巻線４の上、下両端部
にシールド８を配置する場合が多いので、結局、円板巻
線の高さを合計６０ｍｍ程度に低減できる。また、鎖線
円１７ａ及び１７ｂで囲んだシールド８の電界の高い角
部近傍は、直線スペーサ１５との間に油間隙８ｆができ
ないので、電界集中の原因となるトリプルジャンクショ
ンができない。したがって、従来と同程度の電界緩和が
できる。In the actual machine, the shields 8 are often arranged at both upper and lower ends of the disk winding 4, so that the total height of the disk winding can be reduced to about 60 mm. In the vicinity of the high electric field corner of the shield 8 surrounded by the dashed circles 17a and 17b, an oil gap 8f cannot be formed between the shield 8 and the linear spacer 15, so that a triple junction causing electric field concentration cannot be formed. Therefore, the electric field can be relaxed to the same degree as in the related art.

【００１６】又、導電部材の薄板６の尖った縁端部は電
界の加わらない内側に折り込んだので、縁端部で電界集
中が生じることがない。また、スペーサ１０，１１によ
って最端部の円板コイル４ａとシールド８間に間隙がで
きており、そこを通って穴９から抜ける経路で油が流れ
るので、シールド８で覆われても円板コイル４ａが過熱
することがない。Since the sharp edge of the thin plate 6 of the conductive member is folded inward without applying an electric field, no electric field concentration occurs at the edge. Also, a gap is formed between the disk coil 4a at the extreme end and the shield 8 by the spacers 10 and 11, and the oil flows through the hole 9 through the hole 9, so that even if the disk 8 is covered with the shield 8, The coil 4a does not overheat.

【００１７】シールド８の導電性の薄板６の材料として
は、非磁性の銅，アルミ，ステンレスが漏洩磁束による
損失が少なく好適である。これらの材料から成る厚さ１
ｍｍ程度の薄板を予め作った型に合わせてプレス加工、
または絞り加工、或いは板金加工することによって、簡
単に所定の形状に整形できるので、従来に比べて製作工
数を１／２以下にできると共に、材料も従来に比べて安
価である。As a material of the conductive thin plate 6 of the shield 8, non-magnetic copper, aluminum, and stainless steel are suitable because they have little loss due to leakage magnetic flux. Thickness 1 made of these materials
Pressing a thin plate of about mm to the mold made in advance,
Alternatively, since it can be easily formed into a predetermined shape by drawing or sheet metal processing, the number of manufacturing steps can be reduced to half or less as compared with the related art, and the material is inexpensive as compared with the related art.

【００１８】また、シールド８の絶縁被覆７としては、
エポキシ樹脂等の絶縁物の粉体の流動床に導電性薄板６
を浸漬することによって形成できる皮膜、所謂ＦＢＣ
や、同じく絶縁物の粉体を静電塗装することによって形
成できる皮膜がシールド８の形状に関係なく、簡単に製
作できるので好適である。特にＦＢＣが厚さ１〜２ｍｍ
程度の厚い絶縁被覆７が形成できるので最も好適であ
る。このように製作法が簡単なのでＦＢＣの場合、従来
のテーピングによる絶縁被覆に比べて製作工数が１／２
以下になる。As the insulating coating 7 of the shield 8,
Conductive thin plate 6 on fluidized bed of powder of insulating material such as epoxy resin
Film that can be formed by immersion of so-called FBC
Also, a film that can be formed by electrostatically coating a powder of an insulating material is preferable because it can be easily manufactured regardless of the shape of the shield 8. Especially FBC is 1-2mm thick
This is most preferable because a thick insulating coating 7 can be formed. As described above, since the manufacturing method is simple, in the case of FBC, the number of manufacturing steps is 製作 compared to the conventional insulating coating by taping.
It becomes below.

【００１９】このように導電性の薄板６及び絶縁被覆７
とも製作工数を従来の１／２以下に低減でき、かつ材料
も安価であることから、結局シールド８全体としては製
作コストを従来の１／２以下にできる。Thus, the conductive thin plate 6 and the insulating coating 7
In both cases, the number of manufacturing steps can be reduced to １ ／ or less of the conventional one and the material is inexpensive, so that the manufacturing cost of the shield 8 as a whole can be reduced to １ ／ or less of the conventional.

【００２０】シールド８の絶縁被覆７として、この他に
製作に時間が掛るがパルプモールドが可能である。スペ
ーサ１０，１１の材料としては、従来より用いられてい
るプレスボードが安価で絶縁性能がよいので好適であ
る。As the insulating coating 7 of the shield 8, pulp molding is possible, although it takes a long time to manufacture. As a material of the spacers 10 and 11, a conventionally used press board is preferable because it is inexpensive and has good insulation performance.

【００２１】以下、本発明の他の実施例を図５ないし図
７により説明する。Hereinafter, another embodiment of the present invention will be described with reference to FIGS.

【００２２】図５のシールド８はシールド８ｕ，８ｖに
２分割し、また図６はシールド８ｕ，８ｖ，８ｗと３分
割し、図示しないがそれらを導線で接続したものであ
る。これにより電気的には一体のシールド８と変わらな
い。このようにすると、一つ一つの部品の形状が単純に
なり、製作がより簡単になるという利点がある。大形の
シールドを作る場合に好適である。The shield 8 in FIG. 5 is divided into two shields 8u and 8v, and FIG. 6 is divided into three shields 8u, 8v and 8w, and they are connected by conductors (not shown). Thereby, it is electrically the same as the integral shield 8. This has the advantage that the shape of each part is simplified and the manufacture is simpler. It is suitable for making large shields.

【００２３】また図７はシールド８を円周方向で８ｇ，
８ｈ，８ｊ，８ｋ，８ｍ，８ｎ……のように複数に分割
し、図示しないがそれらを導線で接続したものである。
これにより電気的には一体のシールド８と変わらない。
このようにすると、部品が小さくなり、ＦＢＣで絶縁被
覆を形成する際、流動床が小さくて済むという利点があ
る。大形のシールド８を作る場合に好適である。FIG. 7 shows that the shield 8 is 8 g in the circumferential direction.
.. Are divided into plural parts such as 8h, 8j, 8k, 8m, 8n,...
Thereby, it is electrically the same as the integral shield 8.
This has the advantage that the components are smaller and the fluidized bed can be smaller when forming the insulation coating with FBC. This is suitable for making a large shield 8.

【００２４】[0024]

【発明の効果】以上のように本発明によれば、円板巻線
の高さが縮小し、静止誘導電器を小型化することができ
る。As described above, according to the present invention, the height of the disk winding can be reduced, and the stationary induction device can be downsized.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施例である静止誘導電器の断面図
である。FIG. 1 is a sectional view of a stationary induction device according to an embodiment of the present invention.

【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図３】図２の要部を拡大した部分断面図である。FIG. 3 is an enlarged partial sectional view of a main part of FIG. 2;

【図４】図１ないし３に使用したシールドの斜視図であ
る。FIG. 4 is a perspective view of the shield used in FIGS.

【図５】本発明の他の実施例である静止誘導電器巻線の
断面図である。FIG. 5 is a sectional view of a stationary induction winding according to another embodiment of the present invention.

【図６】本発明の他の実施例である静止誘導電器巻線の
断面図である。FIG. 6 is a sectional view of a stationary induction winding according to another embodiment of the present invention.

【図７】本発明の他の実施例であるシールドを上から見
た平面図である。FIG. 7 is a top plan view of a shield according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１…導体、２…絶縁皮膜、３…電線、４…円板巻線、４
ａ，４ｂ，４ｃ…円板コイル、５…コイル間スペーサ、
６…薄板、７…絶縁被覆、８…シールド、８ａ…シール
ド板、８ｂ…側面部、８ｃ…曲面部、８ｄ…開放口、８
ｅ…端部、９…穴、１０，１１…スペーサ、１５…直線
スペーサ、１６…静止誘導電器。DESCRIPTION OF SYMBOLS 1 ... Conductor, 2 ... Insulation film, 3 ... Electric wire, 4 ... Disc winding, 4
a, 4b, 4c: disk coil, 5: spacer between coils,
6: thin plate, 7: insulating coating, 8: shield, 8a: shield plate, 8b: side surface, 8c: curved surface, 8d: open port, 8
e: end portion, 9: hole, 10, 11: spacer, 15: linear spacer, 16: stationary induction device.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮尾 博 茨城県日立市大みか町七丁目２番１号 株 式会社日立製作所電力・電機開発研究所内 (72)発明者 伊賀 尚 茨城県日立市大みか町七丁目２番１号 株 式会社日立製作所電力・電機開発研究所内 (72)発明者 河村 憲一 茨城県日立市国分町一丁目１番１号 株式 会社日立製作所国分事業所内 Ｆターム(参考） 5E043 AA05 AB02 BA01 DB05 5E044 DA04 5E058 CC13  ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Miyao 7-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside Power and Electricity Research Laboratory, Hitachi, Ltd. (72) Inventor Takashi Iga Omika-cho, Hitachi City, Ibaraki Prefecture 7-2-1, Hitachi, Ltd. Electric Power and Electrical Development Laboratory (72) Inventor Kenichi Kawamura 1-1-1, Kokubuncho, Hitachi, Ibaraki F-term in Hitachi, Ltd. Kokubu Office 5E043 AA05 AB02 BA01 DB05 5E044 DA04 5E058 CC13

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 鉄心の外周側に配置された絶縁筒と、該
絶縁筒間にコイル状に巻回した電線の複数個を配置した
円板コイルとを備え、この円板コイルの複数個を絶縁筒
の軸方向に積重ね、絶縁筒と円板コイルの間に周方向に
沿って複数の直線スペーサを配置し、端部の円板コイル
にシルードを配置した静止誘導電器において、前記シル
ードは、導電性部材からなる薄板とこれを絶縁被覆で被
覆したシルード板により形成されると共に、前記シルー
ド板の両端部を円板コイル側に折り曲げ、一方向に伸び
る側面部と、折り曲げ部に所定の曲率を有する曲面部と
から成るＵ字型形状のシルードを形成し、その側面部の
端部を直線スペーサ側に末広がりに傾斜するようにな
し、上記シルードを端部の円板コイルに被せることを特
徴とする静止誘導電器。1. An insulating cylinder disposed on an outer peripheral side of an iron core, and a disk coil in which a plurality of electric wires wound in a coil shape are disposed between the insulating cylinders. Stacked in the axial direction of the insulating cylinder, arrange a plurality of linear spacers along the circumferential direction between the insulating cylinder and the disk coil, in a stationary induction device in which a sillud is arranged on the end disk coil, the sillud is It is formed of a thin plate made of a conductive member and a siled plate coated with an insulating coating, and both ends of the silled plate are bent toward the disk coil side, and a side portion extending in one direction and a predetermined curvature are formed on the bent portion. A curved surface portion having a U-shaped shape is formed, and the end of the side surface portion is inclined so as to diverge toward the linear spacer side, and the above-mentioned siludo is covered on the disk coil at the end portion. Static induction device . 【請求項２】 鉄心の外周側に配置された絶縁筒と、該
絶縁筒の間にコイル状に巻回した電線の複数個を配置し
た円板コイルとを備え、前記円板コイルの複数個を絶縁
筒の軸方向に積重ね、絶縁筒と円板コイルの間に周方向
に沿って複数の直線スペーサを配置し、端部の円板コイ
ルにシルードを配置した静止誘導電器において、前記シ
ルードは導電性部材からなる薄板とこれを絶縁被覆で被
覆したシルード板により形成されると共に、前記シルー
ド板の両端部を円板コイル側に折り曲げ、一方向に伸び
る側面部と、折り曲げ部に所定の曲率でなる曲面部とか
ら成るＵ字型形状のシルードを形成し、その側面部の端
部を直線スペーサ側に末広がりに傾斜するようになし、
上記シルードを端部の円板コイルに被せ、上記側面部を
円板コイルと直線スペーサの間に配置し、前記側面部と
直線スペーサの間に空間部を形成し、この空間部の一部
を塞いで断面形状が三角形状の油間隙を形成するように
上記突起部を直線スペーサに接触させることを特徴とす
る静止誘導電器。2. An insulated cylinder disposed on an outer peripheral side of an iron core, and a disc coil in which a plurality of electric wires wound in a coil shape are arranged between the insulating cylinders, wherein a plurality of the disc coils are provided. Are stacked in the axial direction of the insulating cylinder, a plurality of linear spacers are arranged along the circumferential direction between the insulating cylinder and the disc coil, and a stationary inductor is arranged on the disc coil at the end. It is formed of a thin plate made of a conductive member and a siled plate coated with an insulating coating, and both ends of the silled plate are bent toward the disk coil side, and a side portion extending in one direction and a predetermined curvature are formed on the bent portion. A U-shaped shaped sild consisting of a curved surface portion is formed, and the end of the side portion is inclined so as to diverge toward the linear spacer side,
The above-mentioned siludo is put on the disk coil at the end, the side part is arranged between the disk coil and the linear spacer, a space is formed between the side part and the linear spacer, and a part of this space is formed. A stationary induction electric appliance characterized in that the protrusion is brought into contact with a linear spacer so as to form an oil gap having a triangular cross section when closed. 【請求項３】 上記絶縁被覆をＦＢＣで形成したことを
特徴とする請求項１又は２に記載の静止誘導電器。3. The static induction device according to claim 1, wherein said insulating coating is formed of FBC.