JPH066495Y2 - Resin mold transformer - Google Patents
Resin mold transformerInfo
- Publication number
- JPH066495Y2 JPH066495Y2 JP12802688U JP12802688U JPH066495Y2 JP H066495 Y2 JPH066495 Y2 JP H066495Y2 JP 12802688 U JP12802688 U JP 12802688U JP 12802688 U JP12802688 U JP 12802688U JP H066495 Y2 JPH066495 Y2 JP H066495Y2
- Authority
- JP
- Japan
- Prior art keywords
- air gap
- windings
- winding
- insulating
- resin
- 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、一次巻線と二次巻線が互いに別体に樹脂モ
ールドされ、両巻線間が空気ギャップで絶縁された樹脂
モールド変圧器、ことに前記空気ギャップの保持構造に
関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a resin-molded transformer in which a primary winding and a secondary winding are resin-molded separately from each other, and both windings are insulated by an air gap. In particular, it relates to the air gap holding structure.
第３図および第４図は樹脂モールド変圧器の従来構造を
示す正面図および一部破砕側面図である。図において、
１は巻鉄心であり、その二つの脚部にはそれぞれ互いに
別体に樹脂モールドされた同筒状の内側巻線２および外
側巻線３がギャップ長Ｇなる空気ギャップ４を保持して
互いに同軸状に装着され、両巻線２および３の軸方向両
端部がゴム弾性を有する絶縁支持材５および強化樹脂ブ
ロックからなる絶縁支持材６を介して上下一対のフレー
ム７Ａ，７Ｂ間に所定の締付荷重を保持して挟持される
ことにより、一体化された樹脂モールド変圧器が形成さ
れる。また、絶縁支持材５は空気ギャップ４側に凸部５
Ｂを持ち、この絶縁支持材が巻線の周方向に放射状に複
数個配されることにより、両巻線間の空気ギャップ長Ｇ
が必要な耐電圧性能を保持するに必要な寸法に保持さ
れ、かつ両巻線が互いに同軸状に支持される。さらに、
絶縁支持材６の厚みを調整することにより、巻線端面と
鉄心との間の空気ギャップ長Ｈが必要な耐電圧性能を保
持するに必要な寸法に保持される。3 and 4 are a front view and a partially crushed side view showing a conventional structure of a resin mold transformer. In the figure,
Reference numeral 1 denotes a wound iron core, and two cylindrical inner and outer windings 2 and 3 which are resin-molded separately from each other, have an air gap 4 having a gap length G and are coaxial with each other. In a predetermined shape, and both ends of both windings 2 and 3 in the axial direction are clamped between the pair of upper and lower frames 7A and 7B through an insulating support material 5 having rubber elasticity and an insulating support material 6 made of a reinforced resin block. An integrated resin-molded transformer is formed by being sandwiched while holding the applied load. In addition, the insulating support member 5 has a convex portion 5 on the air gap 4 side.
By having a plurality of insulating support members radially arranged in the circumferential direction of the winding, the air gap length G between both windings is
Are held to the dimensions necessary to maintain the required withstand voltage performance, and both windings are supported coaxially with each other. further,
By adjusting the thickness of the insulating support material 6, the air gap length H between the winding end surface and the iron core is maintained at a dimension required to maintain the required withstand voltage performance.
上述の樹脂モールド変圧器の組立作業は、巻線２および
３を横倒しにした状態で、鉄心窓８を包囲するロ字状に
あらかじめ形成された巻鉄心１を斜め切断部１Ａでコ字
状に開き、これを横倒しされた内側巻線２の中空部に逐
次挿入した後、斜め切断部１Ａを再び結合するという手
順で行われるが、その際二つの巻線がゴム弾性を有する
絶縁支持材５の凸部５Ｂによって同軸状に保持されなけ
ればならない。したがって、凸部５Ｂの突き出し長さを
ある程度大きくするとともに、支持材をその両側から巻
線に押し付ける治具を必要とするので、これらの部材や
治具が巻鉄心の組み込み作業を妨害するという問題が生
ずる。In the above-mentioned resin-molded transformer assembling work, the winding iron core 1 surrounding the iron core window 8 and having a pre-formed winding iron core 1 in the state in which the windings 2 and 3 are laid down is formed into a U-shape at the oblique cutting portion 1A. The procedure is performed by opening and sequentially inserting this into the hollow portion of the inner winding 2 which has been laid down, and then reconnecting the oblique cutting portion 1A. At that time, the two windings have an insulating support material 5 having rubber elasticity. Must be held coaxially by the convex portion 5B. Therefore, the protrusion length of the convex portion 5B must be increased to some extent, and a jig for pressing the support material against the winding from both sides thereof is required. Therefore, these members and jigs hinder the work of incorporating the winding core. Occurs.
一方二つの巻線２および３相互間に耐電圧性能は主とし
て空気ギャップ４の雷サージ電圧に対するフラッシオー
バ電圧で決まるが、絶縁支持材５の凸部５Ｂの突き出し
寸法を大きくすることによって、第５図に示すように樹
脂モールド層２Ｂ，３Ｂで覆われたコイル導体２Ａ，３
Ｂの端と凸部５Ｂとが互いにラップする状態になり、凸
部５Ｂの下面が巻線間の電界と並行する形となるため、
その面に沿ってフラッシオーバ１０５が生じやすくなる
という問題があり、ことに湾曲した樹脂モールド層と凸
部５Ｂとの間に微小ギャップｇが介在すると、誘電率の
大きい支持材５と空気との静電容量分圧の原理に基づい
て微小ギャップｇに電界が集中し、フラッシオーバ電圧
が一層低下する。On the other hand, the withstand voltage performance between the two windings 2 and 3 is mainly determined by the flashover voltage with respect to the lightning surge voltage of the air gap 4, but by increasing the protrusion size of the convex portion 5B of the insulating support material 5, As shown in the figure, coil conductors 2A, 3 covered with resin mold layers 2B, 3B
Since the end of B and the convex portion 5B are overlapped with each other, and the lower surface of the convex portion 5B is parallel to the electric field between the windings,
There is a problem that the flashover 105 is likely to occur along the surface, and especially when the minute gap g is interposed between the curved resin mold layer and the convex portion 5B, the support material 5 having a large dielectric constant and the air are formed. Based on the principle of electrostatic capacitance division, the electric field is concentrated in the minute gap g, and the flashover voltage is further reduced.
また、このような火花電圧の低下を防ぐために、巻線端
部の樹脂モールド層２Ｂ，３Ｂの厚みｄ１を第６図に示
すようにｄ２に増してコイル導体２Ａ，３Ａとのラップ
を防ぎ、凸部５Ｂの沿面方向の電界を緩和する方法も知
られているが、その分巻線２，３の軸方向寸法が増し、
変圧器が大型化するという問題を生ずる。Further, in order to prevent such a decrease in the spark voltage, the thickness d 1 of the resin mold layers 2B and 3B at the winding ends is increased to d 2 as shown in FIG. 6, so that the wrap with the coil conductors 2A and 3A is performed. There is also known a method of preventing and relaxing the electric field in the creeping direction of the convex portion 5B, but the axial dimension of the windings 2 and 3 is increased accordingly.
This causes a problem that the transformer becomes large.
この考案の目的は、二つの巻線間の空気ギャップの保持
構造の改善により、巻鉄心の組み込み作業を阻害せず、
かつ巻線寸法を大型化せずに必要な耐電圧性能を得るこ
とにある。The purpose of the present invention is to improve the structure for holding the air gap between the two windings, thereby not hindering the work of incorporating the winding core,
Moreover, it is to obtain the necessary withstand voltage performance without increasing the size of the winding.
上記課題を解決するために、この考案によれば、鉄心脚
部に互いに同軸状に所定の空気ギャップを保持して装着
されたそれぞれ樹脂モールドされた内側巻線および外側
巻線が、その軸方向両端部に放射状に複数個配された絶
縁支持材により上下一対のフレーム間に支持されたもの
において、前記空気ギャップ長に相応する長さの棒状の
ゴム弾性材からなり、その長さ方向の中間につば状の絶
縁バリヤ部を有する絶縁スペーサを前記空気ギャップ中
に複数個分布して備えてなるものとする。In order to solve the above problems, according to the present invention, resin-molded inner windings and outer windings that are mounted coaxially on an iron core leg portion with a predetermined air gap are provided in the axial direction. One supported by a pair of upper and lower frames by insulating support members radially arranged at both ends, and made of a rod-shaped rubber elastic material having a length corresponding to the air gap length, and an intermediate portion in the length direction. A plurality of insulating spacers each having a brim-shaped insulating barrier portion are distributed in the air gap.
上記手段において、棒状の両端面が内外樹脂モールド巻
線に密接し中間部につば状の絶縁バリヤ部を有するゴム
弾性材からなる絶縁スペーサを空気ギャップ内に分散し
て複数個設けて両巻線をギャップ長Ｇを維持して互いに
同軸状に結合するよう構成したことにより、巻線外部へ
の突出物が排除されて巻鉄心の組み込み作業が容易化さ
れるとともに、巻線をその両端部で支持する絶縁支持材
の凸部が排除されて空気ギャップの火花電圧の低下が阻
止され、かつ絶縁スペーサのつば状の絶縁バリヤ部が棒
状部の沿面放電を阻止するバリヤ効果を発揮することに
より、両巻線間の空気ギャップのフラッシオーバ電圧を
両巻線間に絶縁支持物が存在しない場合の空気ギャップ
の標準火花電圧に近づけることができる。In the above means, a plurality of insulating spacers made of a rubber elastic material having both ends of the rod shape in close contact with the inner and outer resin molded windings and having a brim-shaped insulating barrier portion in the middle are dispersed in the air gap to provide a plurality of windings. Since they are configured to be coaxially coupled to each other while maintaining the gap length G, protrusions to the outside of the winding are eliminated and the work of assembling the winding iron core is facilitated, and at the both ends of the winding. By eliminating the convex portion of the supporting insulating support material to prevent the reduction of the spark voltage of the air gap, and the brim-shaped insulating barrier portion of the insulating spacer exerts the barrier effect of preventing the creeping discharge of the rod portion, The flashover voltage of the air gap between the windings can be approximated to the standard spark voltage of the air gap in the absence of an insulating support between the windings.
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装置を示す一部破砕側面図、
第２図は実施例装置の要部を示す水平方向の断面図であ
り、従来装置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、２０はゴム
弾性材からなる絶縁スペーサであり、内外一対の樹脂モ
ールド巻線２および３相互間の空気ギャップ長Ｇに相応
する棒状部２１と、棒状部２１の中間につば状に突設さ
れた絶縁バリヤ部２２からなり、例えばエチレンプロピ
レンゴム（ＥＰラバー）の成形体または注型体として形
成される。このように形成された絶縁スペーサ２０は、
空気ギャップ４内に第１図に示すように上下方向に２個
所，周方向に少くとも３個所，合計６個以上分散して配
置することにより、空気ギャップ４は所定のギャップ長
Ｇに保持されるとともに、二つの巻線が互いに同軸状に
結合される。また、二つの巻線２および３の軸方向両端
部は、凸部を持たないゴム板１５と、ブロック状の絶縁
支持材６を介して上下一対のフレーム７Ａ，７Ｂ間に所
定の締付荷重を保持して挟持されることにより、巻鉄心
１と一体化された樹脂モールド変圧器を形成することが
できる。FIG. 1 is a partially crushed side view showing an apparatus according to an embodiment of the present invention,
FIG. 2 is a horizontal cross-sectional view showing the main part of the embodiment apparatus, and the same parts as those of the conventional apparatus are designated by the same reference numerals and detailed description thereof will be omitted. In the figure, reference numeral 20 denotes an insulating spacer made of a rubber elastic material, and has a bar-shaped portion 21 corresponding to the air gap length G between the pair of inner and outer resin-molded windings 2 and 3, and a collar-shaped protrusion in the middle of the bar-shaped portion 21. The insulating barrier portion 22 is provided, and is formed as, for example, a molded body or a cast body of ethylene propylene rubber (EP rubber). The insulating spacer 20 formed in this way is
As shown in FIG. 1, two air gaps 4 are arranged vertically in the air gap 4 and at least three air gaps in the circumferential direction, so that a total of six or more air gaps are arranged so that the air gap 4 is maintained at a predetermined gap length G. In addition, the two windings are coaxially coupled to each other. Further, both ends of the two windings 2 and 3 in the axial direction have a predetermined tightening load between the pair of upper and lower frames 7A and 7B via the rubber plate 15 having no convex portion and the block-shaped insulating support member 6. By holding and sandwiching, it is possible to form a resin-molded transformer integrated with the wound iron core 1.
このように形成された実施例変圧器では、二つの巻線
２，３を絶縁スペーサ２０で空気ギャップ長Ｇを保持し
た状態で横倒しにでき、かつ絶縁支持材６および１５を
取り外した状態で巻鉄心１の組み込み作業が行えるの
で、巻鉄心の組み込み作業を容易化することができる。
また、絶縁スペーサ２０がゴム弾性材で形成されて空気
ギャップ４に挿入した際、その端面が二つの樹脂モール
ド巻線２および３の外周面および内周面に密着して微小
な隙き間ｇ（第５図参照）が排除されるので、棒状部２
１の沿面放電の低下が軽減され、かつこの沿面放電のス
トリーマが電界に直交する方向の二つの面を持つつば状
の絶縁バリヤ部２２によりその進展が阻止されるので、
火花電圧を絶縁バリヤ部２２を持たない棒状部だけのそ
れに比べて高めることができる。In the embodiment transformer thus formed, the two windings 2 and 3 can be laid down sideways with the insulating spacer 20 maintaining the air gap length G, and wound with the insulating support members 6 and 15 removed. Since the work of incorporating the iron core 1 can be performed, the work of incorporating the wound iron core can be facilitated.
Further, when the insulating spacer 20 is formed of a rubber elastic material and is inserted into the air gap 4, the end surface thereof is in close contact with the outer peripheral surface and the inner peripheral surface of the two resin mold windings 2 and 3, and a minute gap g (See FIG. 5) is eliminated, so that the rod-shaped portion 2
The decrease in creeping discharge of No. 1 is reduced, and the streamer of this creeping discharge is prevented from progressing by the brim-shaped insulating barrier portion 22 having two surfaces in the direction orthogonal to the electric field.
The spark voltage can be increased as compared with that of only the rod-shaped portion having no insulating barrier portion 22.
ちなみに、最大直径３００mmのロゴウスキー電極を用
い、棒状部２１の直径３０mm，その長さ３０mm，絶縁バ
リヤ部２２の直径５０mm，厚み１０mmのＥＰラバーを用
いて一体成形された絶縁スペーサ２０を上記電極間に挟
み、標準波形（１×４０μｓ）のインパルス電圧を印加
してフラッシオーバ電圧を求め、ギャップ長３０mmの平
等電界大気圧空気ギャップの標準火花電圧と比較した結
果、実施例絶縁スペーサのフラッシオーバ電圧は標準火
花電圧の９３％以上であることがわかった。また実施例
絶縁スペーサ２０の絶縁バリヤ部を削り取り、直径３０
mmの棒状部２１のみとした比較例スペーサについフラッ
シオーバ電圧を求めたところ、標準火花電圧の７５％程
度の値を示し、実施例絶縁スペーサがそのバリヤ効果に
より、空気ギャップ４の耐電圧性能の向上に有効に機能
することが実証された。By the way, using a Rogowski electrode having a maximum diameter of 300 mm, an insulating spacer 20 integrally molded using EP rubber having a rod portion 21 having a diameter of 30 mm, a length thereof of 30 mm, an insulating barrier portion 22 having a diameter of 50 mm and a thickness of 10 mm is provided between the electrodes. , The impulse voltage of the standard waveform (1 × 40 μs) was applied to obtain the flashover voltage, and the result was compared with the standard spark voltage of the uniform electric field atmospheric pressure air gap with a gap length of 30 mm. Was found to be 93% or more of the standard spark voltage. Further, the insulating barrier portion of the insulating spacer 20 of the embodiment was scraped off to obtain a diameter 30
The flashover voltage was calculated for the comparative spacer having only the mm-shaped bar portion 21. As a result, the flashover voltage was about 75% of the standard spark voltage. It was proved that it works effectively for improvement.
なお、実施例スペーサは二つの樹脂モールド巻線の両端
部からかなり軸方向中心側に寄った位置に配されるの
で、従来の絶縁支持材５の突部のようにコイル導体とラ
ップすることによるフラッシオーバ電圧の低下（第５図
参照）を生じないので、第６図のように巻線両端部の樹
脂モールド層の厚みｄ２を厚くする必要もなく、したが
って巻線高さが増大することによる変圧器の大型化を回
避することができる。Since the spacer of the embodiment is arranged at a position considerably closer to the center side in the axial direction from both ends of the two resin mold windings, it is possible to wrap it with the coil conductor like the protrusion of the conventional insulating support material 5. Since the flashover voltage does not decrease (see FIG. 5), it is not necessary to increase the thickness d 2 of the resin mold layer at both ends of the winding as shown in FIG. 6, and therefore the winding height increases. It is possible to prevent the transformer from becoming large due to.
この考案は前述のように、二つの樹脂モールド巻線間の
空気ギャップ長を、空気ギャップ長に相応する長さの棒
状部とつば状の絶縁バリヤ部とが一体化成形されたゴム
弾性材からなる絶縁スペーサ複数個によって保持するよ
う構成した。その結果、巻線を横倒しにして巻鉄心の組
み込み作業を行う際、巻線外部への突出物が排除される
ことによって作業が容易化され、また空気ギャップのフ
ラッシオーバ電圧がゴム弾性を有することによる巻線へ
の密着性および絶縁バリヤ部のストリーマの進展阻止作
用とによって絶縁スペーサのフラッシオーバ電圧を平等
電界空気ギャップの標準火花電圧に極めて近いレベルに
まで向上でき、かつ従来装置のように巻線端部の樹脂モ
ールド層の厚みを増す必要もないので、巻鉄心の組み込
みが容易で、かつ内外巻線間の耐雷サージ電圧強度の高
い樹脂モールド変圧器を、小形かつ安価に提供すること
ができる。As described above, this invention uses the rubber elastic material in which the air gap length between the two resin mold windings is integrally formed with the rod-shaped portion having the length corresponding to the air gap length and the brim-shaped insulating barrier portion. It is configured to be held by a plurality of insulating spacers. As a result, when the winding iron is installed sideways by assembling the winding core, the work is facilitated by eliminating the protrusions to the outside of the winding, and the flashover voltage of the air gap has rubber elasticity. The adhesion to the winding and the action of the streamer on the insulation barrier to prevent the insulation spacer from flashing can improve the flashover voltage of the insulating spacer to a level very close to the standard spark voltage of the air gap of the uniform electric field, and, like the conventional device, Since there is no need to increase the thickness of the resin mold layer at the wire end, it is possible to provide a resin molded transformer that is easy to assemble a winding core and has a high strength against lightning surge voltage between the inner and outer windings, and is compact and inexpensive. it can.
第１図はこの考案の実施例変圧器を示す一部破砕側面
図、第２図は実施例装置の要部を示す水平方向の断面
図、第３図および第４図は従来の変圧器を示す正面図お
よび側面図、第５図は従来変圧器の要部を示す断面図、
第６図は異なる従来の変圧器の要部を示す断面図であ
る。 １……巻鉄心、２……内側樹脂モールド巻線、３……外
側樹脂モールド巻線、４……空気ギャップ、５，６……
絶縁支持材、５Ｂ……凸部、７Ａ，７Ｂ……フレーム、
１５凸部のない絶縁支持材、２０……絶縁スペーサ、２
１……棒状部、２２……絶縁バリヤ部、Ｇ，Ｈ……空気
ギャップ長、ｇ……微小な隙間。FIG. 1 is a partially crushed side view showing a transformer according to an embodiment of the present invention, FIG. 2 is a horizontal sectional view showing a main part of a device according to the present invention, and FIGS. 3 and 4 show a conventional transformer. FIG. 5 is a front view and a side view, and FIG. 5 is a sectional view showing a main part of a conventional transformer.
FIG. 6 is a sectional view showing a main part of a different conventional transformer. 1 ... Winding iron core, 2 ... Inner resin mold winding, 3 ... Outer resin mold winding, 4 ... Air gap, 5, 6 ...
Insulating support material, 5B ... convex portion, 7A, 7B ... frame,
15 Insulating support material without protrusions, 20 ... Insulating spacer, 2
1 ... Rod-shaped part, 22 ... Insulation barrier part, G, H ... Air gap length, g ... Minute gap.
Claims (1)
ップを保持して装着されたそれぞれ樹脂モールドされた
内側巻線および外側巻線が、その軸方向両端部に放射状
に複数個配された絶縁支持材により上下一対のフレーム
間に支持されたものにおいて、前記空気ギャップ長に相
応する長さの棒状のゴム弾性材からなり，その長さ方向
の中間につば状の絶縁バリヤ部を有する絶縁スペーサを
前記空気ギャップ中に複数個分布して備えてなることを
特徴とする樹脂モールド変圧器。1. A plurality of resin-molded inner windings and outer windings, which are mounted coaxially on an iron core leg while holding a predetermined air gap, are radially arranged at both axial ends thereof. Supported by a pair of upper and lower frames by an insulating support member, which is made of a rod-shaped rubber elastic member having a length corresponding to the air gap length, and has a brim-shaped insulating barrier portion in the middle in the length direction. A resin-molded transformer comprising a plurality of insulating spacers distributed in the air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12802688U JPH066495Y2 (en) | 1988-09-30 | 1988-09-30 | Resin mold transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12802688U JPH066495Y2 (en) | 1988-09-30 | 1988-09-30 | Resin mold transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0249113U JPH0249113U (en) | 1990-04-05 |
| JPH066495Y2 true JPH066495Y2 (en) | 1994-02-16 |
Family
ID=31380978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12802688U Expired - Lifetime JPH066495Y2 (en) | 1988-09-30 | 1988-09-30 | Resin mold transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066495Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9160818B2 (en) | 1999-09-21 | 2015-10-13 | Sony Corporation | Communication system and its method and communication apparatus and its method |
-
1988
- 1988-09-30 JP JP12802688U patent/JPH066495Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9160818B2 (en) | 1999-09-21 | 2015-10-13 | Sony Corporation | Communication system and its method and communication apparatus and its method |
| US9380112B2 (en) | 1999-09-21 | 2016-06-28 | Sony Corporation | Communication system and its method and communication apparatus and its method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0249113U (en) | 1990-04-05 |
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