JPH069465Y2 - 2 story iron core transformer - Google Patents
2 story iron core transformerInfo
- Publication number
- JPH069465Y2 JPH069465Y2 JP16809588U JP16809588U JPH069465Y2 JP H069465 Y2 JPH069465 Y2 JP H069465Y2 JP 16809588 U JP16809588 U JP 16809588U JP 16809588 U JP16809588 U JP 16809588U JP H069465 Y2 JPH069465 Y2 JP H069465Y2
- Authority
- JP
- Japan
- Prior art keywords
- story
- winding
- iron core
- yoke
- intermediate yoke
- 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.)
- Expired - Lifetime
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- Coils Of Transformers For General Uses (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は工業用の直流電源として用いられる多相整流
器用の２階建鉄心形変圧器、ことにその２階建巻線の支
持構造に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a two-story iron-core transformer for a multiphase rectifier used as an industrial DC power source, and particularly to a support structure for the two-story winding. .
電気分解や電気製鋼等に用いられる例えば直流アーク炉
は一般に数百ボルト以下の低電圧で数万アンペアといっ
た大電流を必要とするために、整流器用降圧変圧器で三
相交流を６相，１２相などの低電圧多相交流に変換した
後、多相整流器を介して直流側で並列接続することによ
り、低次の高周波成分の少い低圧大電流の直流電流を得
るようにした直流電源装置が知られており、１台の降圧
変圧器で１２相などの多相交流を得るために、２階建鉄
心形変圧器が用いられる。For example, a DC arc furnace used for electrolysis or electric steelmaking generally requires a large current of tens of thousands of amperes at a low voltage of several hundreds of volts or less. DC power supply device that obtains low-voltage and large-current DC current with few low-order high-frequency components by connecting in parallel on the DC side via a multiphase rectifier after converting to low-voltage multiphase AC such as phase Is known, a double-decker iron core transformer is used to obtain multi-phase alternating current such as 12-phase with one step-down transformer.
第３図は一般的な２階建変圧器の中身を示す概略側面
図、第４図はその巻線接続図である。第３図において、
２回建鉄心１は上下一対の継鉄３Ａ，３Ｂによって磁気
的に結合された３相鉄心の鉄心脚2u,2v,2w等２は、その
中間部分が中間継鉄４によって相互に磁気的に結合さ
れ、鉄心窓部が中間継鉄４によって下段の鉄心窓部５Ａ
と上段の鉄心窓部５Ｂとに画成される。また、１０は鉄
心脚2u,2v,2wの中間継鉄４より下側部分に巻装された下
段巻線組，２０は上段巻線組であり、巻線組１０および
２０が第４図に示すように三角結線された一次巻線１１
および２１を持ち、それぞれの二次巻線１２，１３およ
び２２，２３が開放星形および開放三角形に巻装され、
図示しない整流器を介して各相巻線が同相逆並列接続さ
れることにより、２階建変圧器１台と整流器とで１２相
整流回路が構成される。FIG. 3 is a schematic side view showing the contents of a general two-story transformer, and FIG. 4 is a winding connection diagram thereof. In FIG.
The double-decker iron core 1 is magnetically coupled by a pair of upper and lower yokes 3A, 3B, and the core legs 2u, 2v, 2w, etc. 2 of the three-phase iron core have their intermediate portions magnetically mutually magnetized by the intermediate yoke 4. The core window part is connected and the core part window part 5A of the lower stage is connected by the intermediate yoke
And the upper iron core window portion 5B. Further, 10 is a lower winding set wound around the lower portion of the intermediate yoke 4 of the iron core legs 2u, 2v, 2w, 20 is an upper winding set, and the winding sets 10 and 20 are shown in FIG. Primary winding 11 with triangular connection as shown
And 21, each of the secondary windings 12, 13 and 22, 23 wound in an open star and open triangle,
By connecting the windings of each phase in parallel and in-phase via a rectifier (not shown), a two-phase transformer and a rectifier form a 12-phase rectifier circuit.
第５図は第３図におけるＡ−Ａ方向の断面図，第６図は
第５図におけるＢ−Ｂ位置の断面図であり、巻線の支持
構造を示したものである。図において、二つの巻線に簡
略化して示す下段巻線組１０および上段巻線組２０は、
個々の巻線の軸方向端面を絶縁材７を介して環状に覆う
プレスリング１５，１６または２５，２６を備え、中間
継鉄４を挾んでその上下に対向する中間プレスリング１
６と２６の間には中間継鉄４を挾んでその両側に複数分
割された絶縁間隔材8A,8B,8C,8D等８と、9A,9B,9C,9D等
９とが配され、絶縁間隔材８および９の高さＨが中間継
鉄の高さｈより大きく形成されることにより、２階建巻
線１０および２０が上下一対のフレーム５Ａ，５Ｂ間に
中間継鉄４に拘束されることなく挾持され、押しねじ等
によって巻線軸方向に締付荷重Ｗが加えられることによ
って巻線と鉄心が一体化した２階建鉄心形変圧器の中身
が完成する。FIG. 5 is a sectional view taken along the line AA in FIG. 3, and FIG. 6 is a sectional view taken along the line BB in FIG. 5, showing a support structure for the windings. In the figure, the lower winding set 10 and the upper winding set 20 which are simply shown as two windings are
The intermediate press ring 1 is provided with press rings 15, 16 or 25, 26 that annularly cover the axial end faces of the individual windings with the insulating material 7 interposed therebetween, and sandwich the intermediate yoke 4 and oppose it vertically.
Insulation spacers 8A, 8B, 8C, 8D, etc. 8 and 9A, 9B, 9C, 9D, etc. 9 are arranged between 6 and 26, with the intermediate yoke 4 sandwiched between them and divided into a plurality of parts. By forming the height H of the spacers 8 and 9 to be greater than the height h of the intermediate yoke, the two-story windings 10 and 20 are restrained by the intermediate yoke 4 between the pair of upper and lower frames 5A and 5B. It is held without any force, and a tightening load W is applied in the winding axial direction by a push screw or the like to complete the contents of a two-story iron-core transformer in which the winding and the iron core are integrated.
従来構造においては、中間継鉄４の磁性鋼板の積み厚Ｔ
が鉄心脚２のそれと同じ寸法となっているために、絶縁
間隔片８と９との間に鉄心の積み厚Ｔを超える間隔が存
在する。したがって、２階建巻線組１０および２０に直
列に締付荷重Ｗを加えたとき、中間プレスリング１６と
２６が中間継鉄４を挾んで上下に対向する部分では幅Ｔ
にわたって軸方向締付力を伝達する絶縁間隔片が存在し
ないことになり、中間プレスリング１６，２６がこの部
分で中間継鉄４側にたわんでしまい、これが原因で巻線
に加わる軸方向締付力が局部的に不足するという問題が
発生する。巻線の軸方向締付力は巻線に作用する電磁機
械力による巻線の変形やくずれを防ぐために所定の値を
保持する必要があるので、従来構造においては中間プレ
スリング１６および２６の厚みを増して軸方向締付力を
所定の範囲に保持する対策がとられている。In the conventional structure, the stacking thickness T of the magnetic steel plate of the intermediate yoke 4 is T
Has the same size as that of the iron core leg 2, so that there is a space between the insulating space pieces 8 and 9 that exceeds the thickness T of the iron core. Therefore, when a tightening load W is applied in series to the two-storied winding groups 10 and 20, the width T at the portion where the intermediate press rings 16 and 26 face each other vertically across the intermediate yoke 4.
Since there is no insulating spacing piece that transmits the axial tightening force, the intermediate press rings 16 and 26 are bent toward the intermediate yoke 4 side at this portion, which causes axial tightening applied to the winding. There is a problem that the power is locally insufficient. Since the axial tightening force of the winding must be kept at a predetermined value in order to prevent the winding from being deformed or broken by the electromagnetic mechanical force acting on the winding, in the conventional structure, the thickness of the intermediate press rings 16 and 26 can be reduced. Is taken to keep the axial tightening force within a predetermined range.
近年プレスリングのうず流損を低減するために、プレス
リングを積層木材や積層プレスボード，あるいは繊維強
化プラスチックス(FRP)などの絶縁材を環状に切削加工
して製作するケースが多くなっており、これが中間プレ
スリングの厚みの増加に拍車をかけるという問題もあ
る。また、中間プレスリングの厚みの増加に比例して端
材の量も増加するので経済的不利益をもたらす欠点があ
る。In recent years, in order to reduce the eddy current loss of the press ring, there are many cases where the press ring is manufactured by cutting an insulating material such as laminated wood, laminated pressboard, or fiber reinforced plastics (FRP) into an annular shape. However, there is also the problem that this increases the thickness of the intermediate press ring. In addition, the amount of scrap material increases in proportion to the increase in the thickness of the intermediate press ring, which is disadvantageous in that it causes an economic disadvantage.
この考案の目的は、中間プレスリングを強化することな
く均等な巻線締付力が得られる２階建鉄心形変圧器の巻
線締付構造を得ることにある。An object of the present invention is to obtain a winding tightening structure for a two-story iron-core transformer that can obtain uniform winding tightening force without strengthening the intermediate press ring.
上記課題を解決するために、この考案によれば、中間継
鉄を有する２階建鉄心が複数の鉄心脚それぞれに中間継
鉄を挾んで互いに同軸状に巻装された上下段一対の巻線
組を備え、各組の巻線それぞれがその軸方向両端面を絶
縁材を介して覆う一対のプレスリングを持ち、このプレ
スリングのうち中間継鉄を挾んで互いに対向する中間プ
レスリング間に介装された絶縁間隔材を介して２階建巻
線が上下一対のフレーム間に押圧支持されたものにおい
て、前記鉄心脚より小さい積層方向寸法を有する中間継
鉄と、この中間継鉄をその積層方向の両側に挾むよう前
記中間プレスリング間に介装されて中間継鉄と一対の中
間プレスリングとの間に間隙を保持する絶縁間隔材とを
備えてなるものとする。According to the present invention, in order to solve the above-mentioned problems, a pair of upper and lower windings in which a two-story iron core having an intermediate yoke is coaxially wound around each of a plurality of iron core legs with the intermediate yoke sandwiched therebetween. Each of the windings of the set has a pair of press rings that cover both axial end surfaces thereof with an insulating material interposed between the intermediate press rings that sandwich the intermediate yoke and face each other. In a structure in which a two-story winding wire is pressed and supported between a pair of upper and lower frames via an installed insulating spacing member, an intermediate yoke having a stacking dimension smaller than that of the iron core leg, and the intermediate yoke Insulating spacers are interposed between the intermediate press rings so as to be sandwiched between the intermediate press rings so as to be sandwiched between the intermediate press rings and the pair of intermediate press rings.
上記手段において、中間継鉄の積み厚を鉄心脚の積み厚
より小さくし、この中間継鉄をその積層方向に挾んでそ
の両側に配される絶縁間隔材相互の距離を短縮するよう
構成したことにより、中間継鉄を挾んで上下に対向する
中間プレスリング間に介装し得る絶縁間隔材の中間プレ
スリングとの接触面積を増すことが可能となり、したが
って中間プレスリングに作用する曲げ応力を低減でき
る。したがって、中間プレスリングの厚みを増すことな
く２階建巻線に直列に均等な巻線締付力を与えることが
可能となり、巻線に作用する電磁機械力に安定して耐え
る強固な巻線支持構造を有する２階建鉄心形変圧器を得
ることができる。In the above means, the stacking thickness of the intermediate yoke is made smaller than the stacking thickness of the iron core leg, and the intermediate yokes are sandwiched in the stacking direction so as to shorten the distance between the insulating spacers arranged on both sides thereof. This makes it possible to increase the contact area of the insulating spacing material that can be interposed between the intermediate press rings sandwiching the intermediate yoke with the intermediate press ring, and thus reduce the bending stress acting on the intermediate press ring. it can. Therefore, a uniform winding tightening force can be applied in series to the two-story winding without increasing the thickness of the intermediate press ring, and a strong winding that stably withstands the electromagnetic mechanical force acting on the winding. A two-story iron-core transformer having a supporting structure can be obtained.
以下この考案を実施例に基づいて説明する。 The present invention will be described below based on embodiments.
第１図はこの考案の実施例構造を示す側断面図、第２図
は第１図におけるＣ−Ｃ位置における要部の断面図であ
り、従来構造と同じ部分には同一参照符号を用いること
により詳細な説明を省略する。図において、４４は磁性
鋼板の積み厚が鉄心脚２の積み厚Ｔより小さい寸法ｔに
形成された２階建鉄心４０の中間継鉄であり、鉄心脚の
中間部に例えば３角ノッチ形の接合部を介して磁気的に
結合かつ支持される。３６は下段巻線組１０側に各巻線
に対応して設けられた中間プレスリング、４６は上段巻
線組２０の各巻線に対応して設けられた中間プレスリン
グであり、両中間プレスリング３６と４６の間には中間
継鉄４４をその積み厚ｔ方向に挾んで38A,38B,38C,38D
等に分割された絶縁間隔材３８と、39A,39B,39C,39D等
に分割された絶縁間隔材３９とが介装され、絶縁間隔材
３８および３９の高さＨ２が中間継鉄４４の高さｈ２よ
り大きく形成されることにより、２階建巻線組１０およ
び２０が上下一対のフレーム5A,5B間に軸方向に直列に
挾持され、中間継鉄４４に拘束されることなく締付荷重
Ｗが加えられる。FIG. 1 is a side sectional view showing a structure of an embodiment of the present invention, and FIG. 2 is a sectional view of a main part at a position C-C in FIG. 1, and the same reference numerals are used for the same parts as the conventional structure. Therefore, detailed description will be omitted. In the figure, reference numeral 44 denotes an intermediate yoke of a two-story iron core 40 in which a stacking thickness of magnetic steel plates is formed to a dimension t smaller than the stacking thickness T of the iron core leg 2. Magnetically coupled and supported via the joint. 36 is an intermediate press ring provided corresponding to each winding on the lower winding set 10 side, and 46 is an intermediate press ring provided corresponding to each winding of the upper winding set 20. The intermediate yoke 44 is sandwiched in the direction of the stacking thickness t between 38 and 46 and 38A, 38B, 38C, 38D.
The insulating spacing member 38 divided into equal parts and the insulating spacing member 39 divided into 39A, 39B, 39C, 39D etc. are interposed, and the height H 2 of the insulating spacing members 38 and 39 is equal to that of the intermediate yoke 44. By being formed larger than the height h 2 , the two-storied winding groups 10 and 20 are sandwiched in series in the axial direction between the pair of upper and lower frames 5A and 5B, and are tightened without being restrained by the intermediate yoke 44. Applied load W is applied.
このように構成された実施例構造においては、中間継鉄
４４の積み厚ｔが鉄心脚２の積み厚Ｔより小さく形成さ
れた分、絶縁間隔材３８と３９の間の間隔を縮小するこ
とができるので、絶縁間隔材３８，３９と中間プレスリ
ング３６，４６との接触面積を従来構造のそれより広げ
ることが可能となり、逆に中間継鉄４４の上下に間隙を
保持して対向する部分の幅が縮小するので、締付荷重Ｗ
によってこの部分の中間プレスリングに作用する曲げ応
力が減り、中間プレスリングの厚みを従来構造のように
増すことなく２階建巻線組１０および２０の電磁機械力
に耐えるに必要な軸方向締付力を均等に分布して与える
ことが可能になる。In the embodiment structure thus configured, the gap between the insulating spacers 38 and 39 can be reduced by the amount that the pile thickness t of the intermediate yoke 44 is formed smaller than the pile thickness T of the iron core leg 2. As a result, the contact area between the insulating spacing members 38, 39 and the intermediate press rings 36, 46 can be made wider than that of the conventional structure, and conversely, the gap between the upper and lower portions of the intermediate yoke 44 can be maintained to oppose each other. Since the width is reduced, tightening load W
The bending stress acting on the intermediate press ring in this portion is reduced by this, and the axial tightening required to withstand the electromagnetic mechanical force of the two-story winding set 10 and 20 without increasing the thickness of the intermediate press ring as in the conventional structure. It is possible to evenly distribute the applied force.
なお、中間継鉄４４はその積み厚ｔが縮小された分その
高さｈ２が従来より大きくなるが、中間継鉄４４には下
段巻線組１０の発生磁束と上段巻線組２０の発生磁束の
差に相当する鉄心脚２に比べて少い磁束しか通らないの
で、もともと中間継鉄の継面積は鉄心脚のそれより小さ
く、その高さｈの増大は中空プレスリング３６，４６の
厚みの減少によって吸収され、２階建鉄心４０の高さに
はほとんど影響を及ぼさない。逆に、中間継鉄の積み厚
の縮小は鉄心積み作業を簡単化できる利点をもたらす。
また、絶縁間隔材３８，３９の厚みが増加するが、絶縁
間隔材３８および３９はそれぞれ複数分割されてその切
断加工で生ずる端材の発生量が中間プレスリング３６，
４６におけるそれに比べて大幅に少いので、中間プレス
リングの厚みを増すのに比べて使用する絶縁材の無駄を
排除できる利点が得られる。The height h 2 of the intermediate yoke 44 is larger than that of the conventional one because the stacking thickness t is reduced. However, in the intermediate yoke 44, the magnetic flux generated by the lower winding set 10 and the generation of the upper winding set 20 are generated. Since only a small amount of magnetic flux passes through the iron core leg 2 corresponding to the difference in magnetic flux, the joint area of the intermediate yoke is originally smaller than that of the iron core leg, and its height h is increased by the thickness of the hollow press rings 36, 46. Is absorbed by the decrease in the height of the double-decker iron core 40, and the height of the double-decker iron core 40 is hardly affected. On the contrary, the reduction of the stacking thickness of the intermediate yoke brings the advantage that the core loading work can be simplified.
Further, although the thickness of the insulating spacers 38, 39 increases, the insulating spacers 38, 39 are each divided into a plurality of parts, and the amount of the end material generated by the cutting process is reduced by the intermediate press ring 36, 39.
Since it is significantly less than that of 46, there is the advantage of eliminating wasted insulating material as compared to increasing the thickness of the intermediate press ring.
この考案は前述のように、２階建鉄心の中間継鉄の積み
厚を鉄心脚のそれより小さくし、中間継鉄をその積み厚
方向に挾むよう上下の中間プレスリング間に介装された
絶縁間隔材相互の間隔を縮小するよう構成した。その結
果、締付荷重の伝達部材である絶縁間隔材と中間プレス
リングとの接触面積が増すので、絶縁間隔材が存在しな
い部分で中間プレスリングがたわむという従来構造の問
題点が大幅に改善され、したがって中間プレスリングの
厚みを増すことなく２階建巻線に必要な軸方向締付力を
均等に分布して与えることが可能となり、巻線に作用す
る電磁機械力等に安定して耐える強固な巻線締付構造を
有する２階建鉄心形変圧器を提供することができる。ま
た、中間プレスリングの厚みを増すことによって生ずる
端材の増加など経済的不利益が排除されるとともに、中
間継鉄の組立作業における磁性鋼板の積層板数が減る分
鉄心組立作業を省力化できる利点が得られる。As described above, this invention makes the stacking thickness of the intermediate yoke of the two-story iron core smaller than that of the core leg, and is interposed between the upper and lower intermediate press rings so as to sandwich the intermediate yoke in the stacking thickness direction. It is configured to reduce the distance between the insulating spacers. As a result, the contact area between the insulating spacer, which is a member for transmitting the tightening load, and the intermediate press ring increases, so that the problem of the conventional structure in which the intermediate press ring bends in the portion where the insulating spacer does not exist is greatly improved. Therefore, the axial tightening force required for the two-story winding can be evenly distributed and applied without increasing the thickness of the intermediate press ring, and the electromagnetic mechanical force acting on the winding can be stably endured. It is possible to provide a two-story iron-core transformer having a strong winding tightening structure. In addition, economic disadvantages such as increase of scraps caused by increasing the thickness of the intermediate press ring are eliminated, and the core core assembly work can be saved because the number of laminated magnetic steel plates in the assembly work of the intermediate yoke is reduced. Benefits are obtained.
第１図はこの考案の実施例を示す側断面図、第２図は第
１図におけるＣ−Ｃ位置における断面図、第３図および
第４図は２階建変圧器の一般的構造を示す側面図および
その巻線接続図、第５図は従来構造を示す側断面図、第
６図は第５図におけるＢ−Ｂ位置の断面図である。 １，４０……２階建鉄心、２……鉄心脚、３Ａ，３Ｂ…
…継鉄、４，４４……中間継鉄、５Ａ，５Ｂ……フレー
ム、８，９，３８，３９……絶縁間隔材、１０……下段
巻線組、１５，２５……プレスリング、１６，２６，３
６，４６……中間プレスリング、２０……上段巻線組、
ｈ，ｈ２……中間継鉄の高さ、Ｔ，ｔ……鉄心の積み
厚、Ｈ，Ｈ２……絶縁間隔材の高さ。1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line CC in FIG. 1, and FIGS. 3 and 4 show a general structure of a two-story transformer. FIG. 5 is a side view and a winding connection diagram thereof, FIG. 5 is a side sectional view showing a conventional structure, and FIG. 6 is a sectional view taken along line BB in FIG. 1,40 …… 2 story iron core, 2 …… iron core legs, 3A, 3B…
… Yoke iron, 4,44 …… Intermediate yoke, 5A, 5B …… Frame, 8, 9, 38, 39 …… Insulation spacing material, 10 …… Lower winding assembly, 15, 25 …… Press ring, 16 , 26, 3
6,46 ... Intermediate press ring, 20 ... Upper winding set,
h, h 2 ... height of intermediate yoke, T, t ... stacking thickness of iron core, H, H 2 ... height of insulating spacer.
Claims (1)
脚それぞれに中間継鉄を挾んで互いに同軸状に巻装され
た上下段一対の巻線組を備え、各組の巻線それぞれがそ
の軸方向両端面を絶縁材を介して覆う一対のプレスリン
グを持ち、このプレスリングのうち中間継鉄を挾んで互
いに対向する中間プレスリング間に介装された絶縁間隔
材を介して２階建巻線が上下一対のフレーム間に押圧支
持されたものにおいて、前記鉄心脚より小さい積層方向
寸法を有する中間継鉄と、この中間継鉄をその積層方向
の両側に挾むよう前記中間プレスリング間に介装されて
中間継鉄と一対の中間プレスリングとの間に間隙を保持
する絶縁間隔材とを備えてなることを特徴とする２階建
鉄心形変圧器。1. A two-story iron core having an intermediate yoke comprises a pair of upper and lower winding groups in which a plurality of core legs are sandwiched with the intermediate yoke and wound coaxially with each other. Each has a pair of press rings that cover both axial ends of the press rings with an insulating material interposed between them, and an insulating spacing member interposed between the intermediate press rings facing each other with the intermediate yoke sandwiched therebetween. In a case where a two-story winding is pressed and supported between a pair of upper and lower frames, an intermediate yoke having a dimension in the laminating direction smaller than that of the iron core leg, and the intermediate press so as to sandwich the intermediate yoke on both sides in the laminating direction. A two-story iron-core transformer, characterized in that it is provided with an intermediate spacing iron and an insulating spacing material that maintains a spacing between a pair of intermediate press rings, which is interposed between the rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16809588U JPH069465Y2 (en) | 1988-12-26 | 1988-12-26 | 2 story iron core transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16809588U JPH069465Y2 (en) | 1988-12-26 | 1988-12-26 | 2 story iron core transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0288220U JPH0288220U (en) | 1990-07-12 |
| JPH069465Y2 true JPH069465Y2 (en) | 1994-03-09 |
Family
ID=31456973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16809588U Expired - Lifetime JPH069465Y2 (en) | 1988-12-26 | 1988-12-26 | 2 story iron core transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069465Y2 (en) |
-
1988
- 1988-12-26 JP JP16809588U patent/JPH069465Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0288220U (en) | 1990-07-12 |
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