JPH09246067A - Sheet wound transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transformer capable of preventing mixture and removing foreign matters, highly reliable in eliminating a very small gap, and capable of its size reduction. SOLUTION: A ring 6 made of plastic sponge with its triangle section is fitted to the upper and located to a high voltage coil side, of a low voltage coil of a sheet coil transformer, and to the upper part of an electrostatic shield 5 fitted to the upper end of the inside and outside of the high voltage coil, and binds the coil fast. This structure not only prevents the area between the coil insulation 9 and the electrostatic shield 5 from getting mixed with foreign matters, but also eliminates a very small gap and makes it easy to remove foreign matters.

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、シート巻線変圧器
に係り、特に、シート巻線変圧器の静電シールド部の構
造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet winding transformer, and more particularly to a structure of an electrostatic shield portion of the sheet winding transformer.

【０００２】[0002]

【従来の技術】従来、シート巻線変圧器は、金属シート
の両端部に絶縁物製のフィラー（金属シートと同一の厚
さ、または同一の厚さに重ねた絶縁物）を配置し、この
金属シートと絶縁シートとを重ねて巻回したシート巻の
低圧巻線と高圧巻線を鉄心脚に巻装し、低圧巻線の高圧
巻線側の上下端部と高圧巻線の内側の上下端部および外
側の上下端部に、それぞれ静電シールドを配設して金属
シート端部の電界を緩和している。2. Description of the Related Art Conventionally, in a sheet winding transformer, fillers made of an insulating material (insulating material having the same thickness as the metallic sheet or laminated with the same thickness) are arranged at both ends of the metallic sheet. Sheet-winding low-voltage winding and high-voltage winding, which are made by stacking a metal sheet and an insulating sheet, are wound around the iron core legs. Electrostatic shields are provided at the end and the upper and lower ends of the outside, respectively, to reduce the electric field at the end of the metal sheet.

【０００３】図３は従来のシート巻線変圧器の構造を示
す要部断面図で、図３に示すように、鉄心脚１１の外側
の絶縁筒１２に、金属シート１３の両端部に絶縁物製の
フィラー１４を配置し、この金属シート１３と絶縁シー
ト１５とを重ねて巻回して外側に絶縁筒１６を巻き付け
たシート巻の低圧巻線１７が形成されている。この低圧
巻線１７の外側には、絶縁筒１８に、金属シート１９の
両端部に絶縁物製のフィラー２０を配置し、この金属シ
ート１９と絶縁シート２１とを重ねて巻回して外側に絶
縁筒２２を巻き付けた高圧巻線２３が形成されている。FIG. 3 is a sectional view showing the structure of a conventional sheet winding transformer. As shown in FIG. 3, an insulating cylinder 12 is provided outside the iron core leg 11 and an insulating material is provided at both ends of the metal sheet 13. A sheet-wound low-voltage winding 17 is formed by disposing a filler 14 made of metal, winding the metal sheet 13 and the insulating sheet 15 in an overlapping manner, and winding an insulating tube 16 around the outer side. Outside the low-voltage winding 17, an insulating cylinder 18 is provided with fillers 20 made of an insulating material at both ends of the metal sheet 19, and the metal sheet 19 and the insulating sheet 21 are superposed and wound to insulate the outside. A high voltage winding 23 around which the cylinder 22 is wound is formed.

【０００４】低圧巻線１７の高圧巻線側の上下端部にそ
れぞれ静電シールド２４および２５が配設されている。
高圧巻線２３の内側の上下端部にそれぞれ静電シールド
２６および２７が配設され、高圧巻線２３の外側の上下
端部にそれぞれ静電シールド２８および２９が配設され
て、金属シート端部の電界を緩和している。Electrostatic shields 24 and 25 are provided at the upper and lower ends of the low voltage winding 17 on the high voltage winding side, respectively.
Electrostatic shields 26 and 27 are provided at the upper and lower ends of the inside of the high voltage winding 23, and electrostatic shields 28 and 29 are provided at the upper and lower ends of the outside of the high voltage winding 23, respectively. The electric field of the part is relaxed.

【０００５】図４は従来のシート巻線変圧器の巻線の構
造の詳細を示す要部断面図で、高圧巻線２３の内側の上
部を示している。図４に示すように、絶縁筒１８に、金
属シート１９の両端部に絶縁物製のフィラー２０を配置
し、この金属シート１９と絶縁シート２１とを重ねて巻
回して高圧巻線２３が形成されている。高圧巻線２３の
内側の上端部には静電シールド２６が配設されている。FIG. 4 is a sectional view showing the details of the winding structure of a conventional sheet winding transformer, showing the upper part inside the high voltage winding 23. As shown in FIG. 4, a filler 20 made of an insulating material is arranged in both ends of the metal sheet 19 in the insulating cylinder 18, and the metal sheet 19 and the insulating sheet 21 are overlapped and wound to form a high-voltage winding 23. Has been done. An electrostatic shield 26 is arranged at the upper end inside the high-voltage winding 23.

【０００６】[0006]

【発明が解決しようとする課題】従来の技術で述べたシ
ート巻線変圧器の巻線の静電シールド部分の構造では、
静電シールドの曲率部とフィラーの間に微小の空隙が形
成される。SUMMARY OF THE INVENTION In the structure of the electrostatic shield portion of the winding of the sheet winding transformer described in the prior art,
A minute void is formed between the curved portion of the electrostatic shield and the filler.

【０００７】そこで、鉄心のヨーク積み作業やリード線
の結線作業中に、金属性の微小切粉がこの空隙に入る可
能性が考えられる。通常、これらの作業後には掃除機等
によりこのような切粉は取り除かれるが、この空隙に混
入した異物は取りにくい。Therefore, it is conceivable that fine metallic chips may enter the voids during the work of stacking the yokes of the iron core and the work of connecting the lead wires. After such work, such chips are usually removed by a vacuum cleaner or the like, but it is difficult to remove the foreign matter mixed in the voids.

【０００８】絶縁シート２１およびフィラー２０からな
る巻線絶縁物と高電圧部である静電シールド２６の間に
金属性異物３０があると、変圧器の試験や運転中にコロ
ナ放電や絶縁破壊を発生する危険性がある、という問題
点を有していた。If there is a metallic foreign object 30 between the winding insulator consisting of the insulating sheet 21 and the filler 20 and the electrostatic shield 26 which is the high voltage part, corona discharge or dielectric breakdown may occur during the test or operation of the transformer. There was a problem that there is a risk of occurrence.

【０００９】本発明は、従来の技術の有するこのような
問題点に鑑みてなされたもので、異物の混入防止や除去
が容易になり、微小ギャップをなくし、機器の縮小化が
可能なシート巻線変圧器を提供することを目的とする。The present invention has been made in view of the above problems of the prior art, and facilitates prevention and removal of foreign matter, eliminates minute gaps, and makes it possible to reduce the size of the device. The purpose is to provide a line transformer.

【００１０】[0010]

【課題を解決するための手段】本発明において、上記の
課題を解決するための手段は、低圧巻線の高圧巻線側の
上端部と高圧巻線の内側の上端部および外側の上端部に
配設された各静電シールドの上部に、断面が三角形状の
プラスチックスポンジ製のリングを配設して、巻線のフ
ィラーと絶縁シートからなる巻線絶縁部と静電シールド
の間の空隙を埋めるようにしたものである。Means for Solving the Problems In the present invention, means for solving the above problems are provided in the upper end of the low voltage winding on the high voltage winding side, the inner upper end of the high voltage winding, and the outer upper end thereof. A plastic sponge ring with a triangular cross section is placed on top of each of the electrostatic shields that are placed, and a gap is created between the electrostatic shield and the winding insulation part consisting of the filler and insulating sheet of the winding. It was designed to be filled.

【００１１】このように低圧巻線の高圧巻線側の上端部
と高圧巻線の内側の上端部および外側の上端部に配設さ
れた各静電シールドの上部に、断面が三角形状のプラス
チックスポンジ製のリングを配設することにより、異物
の混入防止や除去が容易になり、微小ギャップをなく
し、機器の縮小化を可能にしたものである。In this way, a plastic having a triangular cross section is formed on the upper ends of the low-voltage windings on the high-voltage winding side and on the upper ends of the inner and outer upper ends of the high-voltage windings. By disposing the sponge ring, it is possible to easily prevent or remove foreign matter, eliminate a minute gap, and reduce the size of the device.

【００１２】[0012]

【発明の実施の形態】以下、本発明を図面に示す実施の
形態に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings.

【００１３】図１は本発明のシート巻線変圧器の実施の
形態の圧縮前の状態を示す要部断面図で、図１に示すよ
うに、金属シート１の両端部に絶縁物製のフィラー２を
配置してこの金属シート１と絶縁シート３とを重ねて巻
回したシート巻きの巻線４の内側または外側の上端部に
配設された静電シールド５の上部に、それぞれ断面が三
角形状のプラスチックスポンジ製のリング６（帯状のも
のを巻き付けて両端を接着してリング状に形成しても良
い）と、その上にプラスチック製（リング６と同一の材
質のものでも良いし、一体のものでも良い）の押さえリ
ング７を配設して、巻線部を締め付ける。８は巻線４の
絶縁筒である。FIG. 1 is a cross-sectional view of an essential part of a sheet winding transformer according to an embodiment of the present invention before compression. As shown in FIG. 1, both ends of a metal sheet 1 are made of an insulating filler. 2 is arranged and the cross section is triangular at the upper part of the electrostatic shield 5 disposed at the upper end portion inside or outside the sheet winding 4 in which the metal sheet 1 and the insulating sheet 3 are wound in a superposed manner. Shaped plastic sponge ring 6 (a band-shaped material may be wound around and both ends may be adhered to form a ring shape), and a plastic shape (the same material as the ring 6 may be used, or it may be integrated. The pressing ring 7) may be provided, and the winding portion is tightened. Reference numeral 8 is an insulating cylinder of the winding 4.

【００１４】なお、巻線の構造は、図３に示す従来の構
造とほぼ同じで、絶縁筒に、金属シートの両端部に絶縁
物製のフィラーを配置し、この金属シートと絶縁シート
とを重ねて巻回して外側に絶縁筒が配設されたシート巻
の低圧巻線が形成され、この低圧巻線の外側の絶縁筒
に、金属シートの両端部に絶縁物製のフィラーを配置
し、この金属シートと絶縁シートを重ねて巻回して外側
に絶縁筒が配設された高圧巻線が形成されている。そし
て、低圧巻線の高圧巻線側の上下端部にそれぞれ静電シ
ールドが配設されている。The structure of the winding is almost the same as the conventional structure shown in FIG. 3, in which fillers made of an insulating material are arranged at both ends of the metal sheet in the insulating cylinder, and the metal sheet and the insulating sheet are connected to each other. A sheet-wound low-voltage winding is formed in which an insulating cylinder is arranged on the outside by stacking and winding, and an insulating cylinder on the outer side of this low-voltage winding is provided with an insulating filler at both ends of the metal sheet, The metal sheet and the insulating sheet are overlapped and wound to form a high-voltage winding having an insulating cylinder arranged outside. Then, electrostatic shields are respectively arranged at the upper and lower ends of the low voltage winding on the high voltage winding side.

【００１５】また、高圧巻線の内側の上下端部にそれぞ
れ静電シールドが配設され、高圧巻線の外側の上下端部
にそれぞれ静電シールドが配設されて金属シート端部の
電界を緩和している。このように、巻線上部の静電シー
ルドの上部に断面が三角形状のプラスチックスポンジ製
のリング６とプラスチック製の円板状の押さえリング７
を配置するものである。Further, electrostatic shields are respectively arranged at upper and lower ends of the inside of the high-voltage winding, and electrostatic shields are respectively arranged at upper and lower ends of the outside of the high-voltage winding so that an electric field at the end of the metal sheet is prevented. Has eased. In this way, a plastic sponge ring 6 having a triangular cross section and a plastic disc-shaped pressing ring 7 are provided on the electrostatic shield above the winding.
Is placed.

【００１６】図２は本発明のシート巻線変圧器の実施の
形態の圧縮後の状態を示す要部断面図で、巻線４を締め
付けるために上部より加圧（支持）すると、図２に示す
ように、プラスチックスポンジ製のリング６は圧縮さ
れ、巻線４のフィラー２と絶縁シート３で形成される巻
線絶縁部９と静電シールド５との間の隙間がリング６に
よって埋められるので微小ギャップが無くなり、異物１
０の混入を防止できる。また、仮に異物１０がリング
６、または押さえリング７の上に落ちても、掃除機等に
より除去が容易でき、絶縁の信頼性が向上し機器の小形
化が可能になる。FIG. 2 is a cross-sectional view of an essential part showing a state after compression of the embodiment of the sheet winding transformer of the present invention. When pressure (support) is applied from above to tighten the winding 4, FIG. As shown, the ring 6 made of plastic sponge is compressed, and the gap between the winding insulating portion 9 formed of the filler 2 of the winding 4 and the insulating sheet 3 and the electrostatic shield 5 is filled by the ring 6. Foreign matter 1
Mixing of 0 can be prevented. Further, even if the foreign matter 10 falls on the ring 6 or the pressing ring 7, it can be easily removed by a vacuum cleaner or the like, the insulation reliability is improved, and the device can be downsized.

【００１７】ここで、図１および図２は高圧巻線の内側
の上端部の場合を示しているが、低圧巻線の高圧巻線側
の上端部の場合や高圧巻線の外側の上端部の場合も、ほ
ぼ同様な構造である。Here, FIGS. 1 and 2 show the case of the upper end on the inner side of the high-voltage winding, but the case of the upper end on the high-voltage winding side of the low-voltage winding and the upper end on the outer side of the high-voltage winding. In the case of, the structure is almost the same.

【００１８】[0018]

【発明の効果】本発明のシート巻線変圧器は、低圧巻線
の高圧巻線側の上端部と高圧巻線の内側の上端部および
外側の上端部に配設された各静電シールドの上部に、断
面が三角形状のプラスチックスポンジ製のリングを配設
して構成されているので、次に記載する効果を奏する。The sheet winding transformer of the present invention includes the electrostatic shields disposed at the upper end of the low voltage winding on the high voltage winding side, the inner upper end of the high voltage winding, and the outer upper end thereof. Since a plastic sponge ring having a triangular cross section is arranged on the upper portion, the following effects are obtained.

【００１９】（１）仮に作業中に異物が生じてもリング
の表面に落下するのみで、掃除機等により容易に異物を
除去できる。(1) Even if a foreign substance is generated during the work, the foreign substance can be easily removed by a vacuum cleaner or the like simply by dropping it on the surface of the ring.

【００２０】（２）最も電圧が高く、電界も大きい静電
シールド表面の異物混入が阻止できることにより、機器
としての信頼性が向上する。(2) The reliability of the device is improved by preventing foreign matter from entering the surface of the electrostatic shield having the highest voltage and the highest electric field.

【００２１】（３）さらに、リング材に低誘電率材質の
ものを使用することで、絶縁強度の弱点であった微小ガ
スギャップを無くすことができ、機器の縮小化が可能と
なる。(3) Furthermore, by using a low dielectric constant material for the ring material, it is possible to eliminate the minute gas gap, which was a weak point of the insulation strength, and it is possible to downsize the device.

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

【図１】本発明のシート巻線変圧器の実施の形態の圧縮
前の状態を示す要部断面図。FIG. 1 is a cross-sectional view of essential parts showing a state before compression of an embodiment of a sheet winding transformer of the present invention.

【図２】本発明のシート巻線変圧器の実施の形態の圧縮
後の状態を示す要部断面図。FIG. 2 is a cross-sectional view of essential parts showing a state after compression of the embodiment of the sheet winding transformer of the present invention.

【図３】従来のシート巻線変圧器の構造を示す要部断面
図。FIG. 3 is a cross-sectional view of essential parts showing the structure of a conventional sheet winding transformer.

【図４】従来のシート巻線変圧器の構造の詳細を示す要
部断面図。FIG. 4 is a cross-sectional view of a main part showing details of the structure of a conventional sheet winding transformer.

【符号の説明】[Explanation of symbols]

１…金属シート ２…フィラー ３…絶縁シート ４…巻線 ５…静電シールド ６…リング ７…押さえリング ８…絶縁筒 ９…巻線絶縁部 １０…異物 DESCRIPTION OF SYMBOLS 1 ... Metal sheet 2 ... Filler 3 ... Insulation sheet 4 ... Winding 5 ... Electrostatic shield 6 ... Ring 7 ... Pressing ring 8 ... Insulation cylinder 9 ... Winding insulation part 10 ... Foreign matter

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 金属シートの両端部に絶縁物製のフィラ
ーを配置し、この金属シートと絶縁シートとを重ねて巻
回したシート巻の低圧巻線と高圧巻線を鉄心脚に巻装
し、低圧巻線の高圧巻線側の上下端部と高圧巻線の内側
の上下端部および外側の上下端部に、それぞれ静電シー
ルドを配設してなるシート巻線変圧器において、前記低
圧巻線の高圧巻線側の上端部と高圧巻線の内側の上端部
および外側の上端部に配設された各静電シールドの上部
に、断面が三角形状のプラスチックスポンジ製のリング
を配設して巻線部を締め付けたことを特徴とするシート
巻線変圧器。1. A low-voltage winding and a high-voltage winding of sheet winding, in which fillers made of an insulating material are arranged at both ends of a metal sheet, and the metal sheet and the insulating sheet are superposed and wound around an iron core leg. A sheet-winding transformer having electrostatic shields at the upper and lower ends of the low-voltage winding on the high-voltage winding side, and the upper and lower end portions inside and outside the high-voltage winding, respectively. A plastic sponge ring with a triangular cross section is placed on the upper end of the high voltage winding side of the high voltage winding and on the top of each electrostatic shield on the inner and outer upper ends of the high voltage winding. A sheet winding transformer characterized in that the winding portion is tightened.