JPH01107508A - Transformer - Google Patents

Transformer

Info

Publication number
JPH01107508A
JPH01107508A JP63235143A JP23514388A JPH01107508A JP H01107508 A JPH01107508 A JP H01107508A JP 63235143 A JP63235143 A JP 63235143A JP 23514388 A JP23514388 A JP 23514388A JP H01107508 A JPH01107508 A JP H01107508A
Authority
JP
Japan
Prior art keywords
winding
windings
partial windings
partial
transformer
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.)
Pending
Application number
JP63235143A
Other languages
Japanese (ja)
Inventor
Drahoslav Dipl Ing Zdarek
ドラホスラフ・ツダレク
Walter Dipl Ing Goseberg
ヴアルター・ゴーゼベルク
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EWD ELECTRON WERKE DEUTSCHE GmbH
Original Assignee
EWD ELECTRON WERKE DEUTSCHE GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EWD ELECTRON WERKE DEUTSCHE GmbH filed Critical EWD ELECTRON WERKE DEUTSCHE GmbH
Publication of JPH01107508A publication Critical patent/JPH01107508A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2823Wires

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Detergent Compositions (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Power Conversion In General (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE: To prevent the generation of a balanced current in a parallel circuit by shifting plural partial windings of both winding parts mutually in reverse directions about the radial direction of a transformer core so that the levels of voltage induced in both the winding parts by a magnetic field are mutually equal. CONSTITUTION: The windings of a transformer connected between terminals A, B are constituted of the 1st winding part having partial widings 1a, 1b and the 2nd winding part having partial windings 2a, 2b. Both the winding parts 1a, 1b and 2a, 2b are connected in parallel and the partial windings 1a, 2b have a large interval from the core K and the partial windings 2a, 1b have a small interval. Halves of the whole number of times of winding of one winding part are respectively distributed to both the partial windings. Namely both the winding parts or wire materials connected in parallel are equivalent about positions in the magnetic field applied by the transformer and voltage levels induced in both the winding parts are made equal. Consequently a balanced current is not allowed to flow into the parallel circuit and a loss due to the balanced current is not generated.

Description

【発明の詳細な説明】 本発明は請求項1の上位概f示された、例えばスイッチ
ング電源用のトランスに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transformer for, for example, a switching power supply.

従来の技術 主としてテレビジョン受像機、ビデオレコーダ等に用い
られるスイッチング電源は、受像機回路を電源から直流
的に絶縁し、かつ2次側では整流回路を介して異なる電
圧値および波形の作動電圧を供給するトランスを必要と
する。スイッチング電源をテレビジョン受像機の水平周
波数と同期させることは公知である。この場合にこのス
イッチング電源は約16 KHzの周波数で動作する。
Conventional technology A switching power supply mainly used in television receivers, video recorders, etc. isolates the receiver circuit from the power supply in a direct current manner, and on the secondary side, operates voltages of different voltage values and waveforms through a rectifier circuit. Requires a transformer to be supplied. It is known to synchronize switching power supplies with the horizontal frequency of a television receiver. In this case, this switching power supply operates at a frequency of approximately 16 KHz.

高解像度のテレビジョンシステムへ移行スる場合に、3
2KHzのオーダーの水平周波数が使用される。スイッ
チング電源がこの高められた周波数で動作する場合、表
皮効果が障害として一層高い損失の形式で顕著になる。
When moving to a high-definition television system, there are three
Horizontal frequencies on the order of 2 KHz are used. When switching power supplies operate at this increased frequency, the skin effect becomes more pronounced as a disturbance in the form of higher losses.

この損失は銅に対するよシ高い費用を用いて低減させな
ければならない。表皮効果を回避するために巻線用の線
材としてリンツ線を用いることは公知である。しかしり
ツツ線は自動装置による巻線の製造の場合に著しい困難
を伴なう。何故ならばリンツ線は、中味のつまった銅線
に比較して、剛性が劣シそのため扱かいにくいからであ
る。
This loss must be reduced with higher costs for copper. It is known to use Lindt wire as wire material for windings in order to avoid skin effects. However, slit wires present considerable difficulties in the production of windings by automatic equipment. This is because Lindt wire is less rigid than solid copper wire and is therefore difficult to handle.

さらに−層大きい巻線スペースが必要とされる。Additionally, a larger winding space is required.

表皮効果を回避するために、並列に接続された複数本の
線材から成る各巻線を、例えば2つの巻線部またはパイ
ファイラー巻線として形成することは公知である。この
種の解決手段の場合、両方の巻線部または複数本の線材
は必然的に、トランスの磁界に対して等しい位置を有す
ることがない。このことは両巻線部に誘起される電圧が
完全には等しくならないことを意味する。この誘起され
る電圧の相異のため、両方の巻線部の並列接続内にバラ
ンス化電流が流れるようになり、そのため不所望の損失
電力が生ずる。
In order to avoid skin effects, it is known to form each winding of a plurality of wires connected in parallel, for example as two winding sections or a pie filer winding. In solutions of this type, the two windings or wires necessarily do not have an equal position with respect to the magnetic field of the transformer. This means that the voltages induced in both windings are not completely equal. This induced voltage difference causes a balancing current to flow in the parallel connection of both windings, which results in undesired power losses.

発明の解決すべき問題点 本発明の課題は、表皮効果を除去するために巻線を、並
列に接続された複数本の巻線部または線材から構成する
場合に、前述の並列回路にバランス化電流が生じないよ
うにすることである。
Problems to be Solved by the Invention An object of the present invention is to balance the aforementioned parallel circuit when the winding is composed of a plurality of winding parts or wires connected in parallel in order to eliminate the skin effect. The goal is to prevent current from occurring.

問題点を解決するための手段 この課題は請求項1に示された本発明によシ解決されて
いる・へ匈鴫布稲硼曳呵庵硼(晃禾9鷺魂籾惺城貧肯鴬
末痺T負渇2 発明の利点 本発明による解決手段によシ次の利点が得られる。即ち
並列に接続された両方の巻線部または線材は、トランス
の作用磁界に対する位置に関して等価となシ、そのため
両巻線部中に誘起される電圧が等しくなる。これらの電
圧が等しいと、両巻線部または線材の並列回路内にバラ
ンス化電流が流れなくなシ、そのためこのバランス化電
流に起因する損失も生じなくなる。部分巻線の最適の配
置は例えば次のようにして経験的に求められる。即ちこ
の並列回路を区分けしてさらにトランスの所定の磁界に
対して、両方の巻線部中に誘起される電圧が等しくなる
ようにして、求められる。
Means for Solving the Problem This problem has been solved by the present invention as set forth in claim 1. ADVANTAGES OF THE INVENTION The solution according to the invention provides the following advantages: both windings or wires connected in parallel are of equal size with respect to their position with respect to the acting magnetic field of the transformer. , so the voltages induced in both windings become equal. When these voltages are equal, no balancing current flows in both windings or in the parallel circuit of the wires, and therefore the voltage induced in both windings becomes equal. The optimum arrangement of the partial windings can be determined empirically, for example, as follows: This parallel circuit is divided into sections, and for a given magnetic field of the transformer, the optimal arrangement of the partial windings is determined empirically. It is determined so that the voltages induced in both are equal.

本発明は個室コイル体と組み合わせると著しく有利であ
る。この場合はコイル体の軸方向へ相続く部分巻線が個
室コイル体の個々の室の中に収容される。
The invention is particularly advantageous when combined with a single-chamber coil body. In this case, partial windings successive in the axial direction of the coil body are accommodated in individual chambers of the private coil body.

実施例の説明 第1図において、端子AとBの間に設けられているトラ
ンスの巻線は、部分巻線1aおよび1bを有する第1巻
線部と、部分巻線2aおよび2bを有する第2巻線部と
を有する。両方の巻線部1a、1bおよび2a、  2
1:+は並列に接続されている。部分巻線1aおよび2
bはコアKからの大きい間隔を有し、部分巻線2aおよ
び1bは小さい間隔を有する。1つの巻線部の全部の巻
回数はそれぞれ半分ずつ両方の部分巻線へ配分されてい
る。図示されているように両方の巻線部1a、、1bお
よび2a、2bは、それらのコアKにおよび磁界に対す
る位置に関して等価である。各々の巻線部はその一方の
半部がコアにの近傍に設けられ、他方の半部はコアから
遠い位置に設けられる。コアKに対するこれらの等測的
な幾何学位置によシ、両方の巻線部中に誘起される電圧
も等しくなる。その結果、巻線1 at  1 b、 
 2 b+  2 aによシ形成される閉回路中に、バ
ランス化電流が流れることがなくなる。
DESCRIPTION OF THE EMBODIMENTS In FIG. 1, the windings of the transformer provided between terminals A and B are divided into a first winding portion having partial windings 1a and 1b, and a first winding portion having partial windings 2a and 2b. It has two winding parts. Both windings 1a, 1b and 2a, 2
1:+ are connected in parallel. Partial windings 1a and 2
b has a large spacing from the core K, and the partial windings 2a and 1b have a small spacing. The total number of turns of a winding section is distributed in half to the two partial windings. As shown, both windings 1a, 1b and 2a, 2b are equivalent with respect to their core K and position relative to the magnetic field. Each winding has one half proximate to the core and the other half remote from the core. Due to their isometric geometrical position relative to the core K, the voltages induced in both windings are also equal. As a result, winding 1 at 1 b,
No balancing current flows in the closed circuit formed by 2 b + 2 a.

第2図において第1巻線部は3つの部分巻線Ia、1b
tlCを有し、第2巻線部も3つの部分巻線2a、  
2b、2Cを有する。両方の巻線部の部分巻線も、第1
図における様にコアに対して互い違いに配置されている
ため、磁界に対するそれらの位置に関して等価となる。
In Fig. 2, the first winding section has three partial windings Ia and 1b.
tlC, and the second winding part also has three partial windings 2a,
2b, 2C. The partial windings of both winding sections are also
Since they are staggered with respect to the core as in the figure, they are equivalent with respect to their position with respect to the magnetic field.

巻線部1は一方の半部が即ち部分巻線1bがコアに密に
おかれ、他の半分が即ち部分巻線1aおよび1cはコア
Kから遠くに設けられる。同様に第2巻線部2も半部が
即ち部分巻線2aおよび2cがコアに密に設けられ、半
部が即ち部分巻線2bがコアKから遠くに設けられる。
One half of the winding 1, namely the partial winding 1b, is located close to the core, and the other half, namely the partial windings 1a and 1c, are arranged far from the core K. Similarly, in the second winding section 2, one half, namely the partial windings 2a and 2c, are provided close to the core, and one half, namely the partial winding 2b, is provided far from the core K.

第3図は各巻線部ごとに5つの部分巻線を有する場合の
相応の配置を示す。巻線部1はこの巻線部の全巻回数の
各6分の1を有する部分巻、線1a、lcおよび1eが
、即ち全巻回数の半分がコアから遠くに設けられ、さら
に全巻回数の各4分の1を有する1bおよび1dが即ち
全巻回数のそれぞれ4分の1が、即ち同様に半分がコア
に密に設けられる。同様に巻回数の各4分の1を有する
部分巻線2bおよび2dは即ち巻回数の半分はコアから
遠くに設けられ、全巻回数の各6分の1を有する部分巻
線2a、2Cおよび2eは即ち全巻回数の半分はコアに
密に設けられる。そのため両方の巻線部la、lb。
FIG. 3 shows a corresponding arrangement with five partial windings for each winding section. Winding part 1 has partial windings, wires 1a, lc and 1e, each having one-sixth of the total number of turns of this winding part, i.e. half of the total number of turns is provided far from the core, and in addition each of four of the total number of turns. 1b and 1d with a quarter, ie a quarter of the total number of turns, ie likewise a half, are arranged tightly on the core. Similarly, the partial windings 2b and 2d each have a quarter of the number of turns, i.e. half of the turns are located far from the core, and the partial windings 2a, 2C and 2e each have a sixth of the total number of turns. That is, half of the total number of turns is densely provided on the core. Therefore, both winding sections la, lb.

lc、 1’d、 ieおよび2a、 2b、 2c。lc, 1'd, ie and 2a, 2b, 2c.

2d、2eは、コアおよび磁界に対する位置が等価とな
る。
2d and 2e have equivalent positions relative to the core and the magnetic field.

第4図は1次巻線Pおよび2次巻線Sに対する個室コイ
ル体の実施例を示す。相続く全部で11の個室は交番的
にそれぞれ1次巻線の部分巻線Pおよび2次巻線の部分
巻線Sを有する。
FIG. 4 shows an embodiment of the private coil body for the primary winding P and the secondary winding S. A total of 11 successive compartments alternately each have a subwinding P of the primary winding and a subwinding S of the secondary winding.

全部の部分巻線PおよびSは第1図〜第6図におけるよ
うに配置される、即ち全部の部分巻線は交番的にコアか
ら遠い間隔および近い間隔で設けられる。各6つの部分
巻線を有する2つの巻線部から形成される1次巻線Pは
、接続端子AおよびBを有する。各5つの部分巻線を有
する2つの巻線部から形成される2次巻線Sは、接続端
子CおよびDを有する。スイッチング電源用の個室コイ
ル体形式のこの種の、1次巻線および2次巻線の個別化
配置は公知であシ、ドイツ連邦共和国特許出願第312
9381号公報に詳述されている。
All subwindings P and S are arranged as in FIGS. 1 to 6, ie all subwindings are alternately spaced far and near the core. The primary winding P, which is formed from two winding sections each with six partial windings, has connection terminals A and B. The secondary winding S, which is formed from two winding parts each with five partial windings, has connection terminals C and D. A separate arrangement of primary and secondary windings of this kind in the form of a single-chamber coil body for switching power supplies is known, and is described in German Patent Application No. 312 of the Federal Republic of Germany.
It is detailed in the 9381 publication.

例えば巻線全体は第4図に示されているように、個室コ
イル体の形式で設けられる。このことは、軸方向に相続
く、1次巻線Pおよび2次巻線Sの部分巻線が、個室コ
イル体の複数個の個室の中に収容されることを意味する
。そのため第4図における、部分巻HpおよびSの間の
垂直線はそれぞれ、個室コイル体の個室を形成する隔壁
を示す。
For example, the entire winding is provided in the form of a single-chamber coil, as shown in FIG. This means that axially successive partial windings of the primary winding P and the secondary winding S are accommodated in a plurality of compartments of the compartment coil body. Therefore, in FIG. 4, the vertical lines between the partial turns Hp and S each indicate the partitions forming the cells of the cell coil body.

前述のように、直列に接続された複数個の部分巻線をそ
れぞれ有する、並列に接続された複数個の巻線部1,2
を備えた巻線を有するトランスにおいて、両巻線部の複
数個の部分巻i余、’磁界によシ両巻線部に誘起される
電圧が実質的に等しくなるように、トランスコアKに対
して、半径方向で相互に逆方向にすらし゛て設けた構成
を実施するために、第1コイル部の、軸方向に相続く部
分巻線la、ibが交番的にトランスコアにへの第1の
半径方向距離ないし第2の半径方向距離を有するように
し、さらに前記部分巻線に対して相補的に相続く、第2
コイル部の部分巻線2a、2bがトランスコアにへの前
記の第2の半径方向距離ないし第1の半径方向距離を有
するようにすることができる。
As mentioned above, a plurality of winding sections 1, 2 connected in parallel each have a plurality of partial windings connected in series.
In a transformer having a winding with On the other hand, in order to implement an arrangement in which the windings are arranged in mutually opposite directions in the radial direction, the axially successive partial windings la, ib of the first coil part are alternately connected to the transformer core. a second radial distance from one to a second radial distance, and further complementary to the partial winding.
It can be provided that the partial windings 2a, 2b of the coil part have the aforementioned second radial distance or first radial distance to the transformer core.

さらにトランスコアの軸方向に相続く3つの部分巻線1
a−c、1a−cにおいて、巻線部ごとに、端子側の両
方の部分巻線ia、1c;2a、2cが、1つの巻線部
の全巻回数の4分の1をそれぞれ有するようにし、さら
に中間の部分巻線1b、2bが2分の1をそれぞれ有す
るようにすることができる。
Furthermore, three partial windings 1 are successively arranged in the axial direction of the transformer core.
a-c, 1a-c, for each winding section, both partial windings ia, 1c; 2a, 2c on the terminal side each have a quarter of the total number of turns of one winding section; , furthermore, the intermediate partial windings 1b, 2b can each have a half.

さらに軸方向へ相続く、巻線部の部分巻線が個室コイル
体の個室の中に設けられるようにすることができる。
Furthermore, it is possible for partial windings of the winding section that follow each other in the axial direction to be arranged in the individual chambers of the individual chamber coil body.

発明の効果 本発明により、高められた周波数で作動されるスイッチ
ング電源用のトランスにおける、障害となる表皮効果を
低減するための複数個の巻線部の並列接続において、損
失電力の原因となるバランス化電流が流れなくなるよう
にした構成が提供される。
Effects of the Invention According to the present invention, in a transformer for a switching power supply operated at an increased frequency, in parallel connection of several winding sections in order to reduce the disturbing skin effect, the balance which causes power loss can be improved. A configuration is provided in which no current flows.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は各2つの部分巻線を有する2つの巻線部による
本発明による解決手段の基本構成図、第2図は各巻線部
毎に3つの部分巻線を有するようにした、第1図の装置
の変形実施例の構成図、第3図は各巻線部毎に5つの部
分巻線を有する場合の構成図、第4図は1次巻線および
2次巻線を個室巻線として構成した巻線の構成図を示す
。 1a、1b、1c、ld、le、2a、2b。 2C,2d、2e・・・部分巻線、P・・・1次巻線、
S・・・2次巻線、A、B、C,D・・・端子、K・・
・コア
1 shows the basic construction of the solution according to the invention with two winding sections each having two partial windings; FIG. A configuration diagram of a modified example of the device shown in the figure, Figure 3 is a configuration diagram in which each winding section has five partial windings, and Figure 4 shows the primary winding and secondary winding as private windings. A configuration diagram of the configured winding is shown. 1a, 1b, 1c, ld, le, 2a, 2b. 2C, 2d, 2e... partial winding, P... primary winding,
S... Secondary winding, A, B, C, D... terminal, K...
·core

Claims (1)

【特許請求の範囲】[Claims] 1.直列に接続された複数個の部分巻線をそれぞれ有す
る、並列に接続された複数個の巻線部(1,2)を備え
た巻線を有するトランスにおいて、両巻線部の複数個の
部分巻線を、磁界により両巻線部に誘起される電圧が実
質的に等しくなるように、トランスコア(K)に対して
、半径方向で相互に逆方向にずらして設けたことを特徴
とするトランス。
1. In a transformer having a winding comprising a plurality of winding parts (1, 2) connected in parallel, each of which has a plurality of partial windings connected in series, the plurality of parts of both winding parts The windings are radially shifted from each other in opposite directions with respect to the transformer core (K) so that the voltages induced in both windings by the magnetic field are substantially equal. Trance.
JP63235143A 1987-09-26 1988-09-21 Transformer Pending JPH01107508A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873732558 DE3732558A1 (en) 1987-09-26 1987-09-26 TRANSFORMER, ESPECIALLY FOR A SWITCHING POWER SUPPLY
DE3732558.2 1987-09-26

Publications (1)

Publication Number Publication Date
JPH01107508A true JPH01107508A (en) 1989-04-25

Family

ID=6337002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63235143A Pending JPH01107508A (en) 1987-09-26 1988-09-21 Transformer

Country Status (8)

Country Link
EP (1) EP0309837B1 (en)
JP (1) JPH01107508A (en)
KR (1) KR970004571B1 (en)
AT (1) ATE83334T1 (en)
DE (2) DE3732558A1 (en)
ES (1) ES2036644T3 (en)
FI (1) FI884385A (en)
GR (1) GR3007255T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545304A1 (en) * 1995-12-05 1997-06-12 Bosch Gmbh Robert Split primary winding transformer in a flyback supply circuit
JP3367427B2 (en) * 1998-08-11 2003-01-14 株式会社高岳製作所 Single-phase three-wire transformer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107217A (en) * 1979-02-08 1980-08-16 Toshiba Corp Large current transformer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971291C (en) * 1941-10-28 1959-01-08 Telefunken Gmbh High frequency transformer for short waves
US4004251A (en) * 1975-11-03 1977-01-18 General Electric Company Inverter transformer
US4259716A (en) * 1978-02-06 1981-03-31 General Electric Company Transformer for use in a static inverter
DE3129381A1 (en) * 1981-07-25 1983-02-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt POWER SUPPLY TRANSFORMER, ESPECIALLY FOR A TELEVISION RECEIVER
DE3147984A1 (en) * 1981-12-04 1983-06-16 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt TRANSFORMER, ESPECIALLY FOR A SWITCHING POWER SUPPLY IN A TELEVISION RECEIVER
DE3515706A1 (en) * 1985-05-02 1986-11-06 Newek Neue Elektronik Werke GmbH, 3000 Hannover Transformer for a switched-mode power supply

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55107217A (en) * 1979-02-08 1980-08-16 Toshiba Corp Large current transformer

Also Published As

Publication number Publication date
FI884385A0 (en) 1988-09-23
DE3876575D1 (en) 1993-01-21
EP0309837A1 (en) 1989-04-05
ATE83334T1 (en) 1992-12-15
KR890005778A (en) 1989-05-17
DE3732558A1 (en) 1989-04-06
EP0309837B1 (en) 1992-12-09
GR3007255T3 (en) 1993-07-30
KR970004571B1 (en) 1997-03-29
FI884385A (en) 1989-03-27
ES2036644T3 (en) 1993-06-01

Similar Documents

Publication Publication Date Title
US4500833A (en) Switched mode power supply transformer
US20060123621A1 (en) Method of manufacturing stator of rotating electric machine
GB1335634A (en) Production of magnetic coils for the creation of intense fields
US5034717A (en) Stationary electromagnetic induction unit
US4247889A (en) High-voltage-secondary transformer, particularly television line transformer
US4417388A (en) Method of making a multiple open turn lap wound dynamoelectric machine
JPH01107508A (en) Transformer
US1644729A (en) Stationary induction apparatus
ES8700798A1 (en) Method of manufacturing a saddle-shaped deflection coil for a picture display tube and deflection system having saddle-shaped deflection coils.
US5917396A (en) Wideband audio output transformer with high frequency balanced winding
GB1217703A (en) Electrical winding structures
US2901713A (en) High current transformer
US3538473A (en) Stranded winding for high current electric apparatus
US4470006A (en) Transformer
US343602A (en) Sest available cop
US1235081A (en) Reactance-coil.
RU2004109701A (en) METHOD OF RIAA-CORRECTION OF THE SIGNAL OF THE SOUND FREQUENCY USING A TRANSFORMER
JPS592572A (en) High voltage generator
JPH06151213A (en) Twist thin type voltage converter and its use
US2949590A (en) Plural-layer winding with cooling slits
SU1226368A1 (en) Three-component standard of magnetic induction
JPH0210707A (en) Method of winding coil for producing magnetic field
SU864352A1 (en) Transformer helical winding
JPS6297236A (en) Deflection yoke
JP2000184684A (en) Linear motor