EP0523588B1 - Transformatorwicklung bestehend aus einem Isolierband mit elektrisch leitfähigen Mustern zum Parallelschalten von den Mustern beim zickzackförmigen Falten dieses Isolierbandes - Google Patents

Transformatorwicklung bestehend aus einem Isolierband mit elektrisch leitfähigen Mustern zum Parallelschalten von den Mustern beim zickzackförmigen Falten dieses Isolierbandes Download PDF

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Publication number
EP0523588B1
EP0523588B1 EP92111885A EP92111885A EP0523588B1 EP 0523588 B1 EP0523588 B1 EP 0523588B1 EP 92111885 A EP92111885 A EP 92111885A EP 92111885 A EP92111885 A EP 92111885A EP 0523588 B1 EP0523588 B1 EP 0523588B1
Authority
EP
European Patent Office
Prior art keywords
patterns
pattern
winding
turns
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.)
Expired - Lifetime
Application number
EP92111885A
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English (en)
French (fr)
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EP0523588A1 (de
Inventor
Pierre-Yves Boitard
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.)
Harmer and Simmons France SAS
Original Assignee
Alcatel Converters SA
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Filing date
Publication date
Application filed by Alcatel Converters SA filed Critical Alcatel Converters SA
Publication of EP0523588A1 publication Critical patent/EP0523588A1/de
Application granted granted Critical
Publication of EP0523588B1 publication Critical patent/EP0523588B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/041—Printed circuit coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H01F2027/2861—Coil formed by folding a blank

Definitions

  • the field of the invention is that of transformer windings and more precisely that of windings formed by strips of electrically conductive material included on an insulating tape.
  • miniature electric windings in particular those used in high-frequency transformers used in switching power supplies, are generally made from copper ribbons whose thickness is close to the depth of penetration of electric currents in the conductors, that is to say the thickness of the skin.
  • These copper tapes are arranged on a sheet of insulating material, the folding of which accordions allows winding to be obtained.
  • the secondary if the secondary consists of 8 turns in parallel, the current circulating in each turn is no more than 1 ampere, a much more reasonable value, while the secondary voltage is always 6 volts.
  • connection wires as shown in FIG. 1. This figure was taken from the review ELECTRONICS OF POWER n ° 36 p. 46.
  • Figure 1 shows the principle of connection of primary and secondary turns of a transformer.
  • the patterns 10 to 17 of the transformer consist of a continuous strip of copper. These patterns are in series and folding allows four turns to be obtained in series.
  • the patterns 10 and 17 constitute the ends and a primary voltage V1 can be applied to them.
  • the transformer secondary consists of unit turns 19 to 22. Each of the transformer turns is crossed by a magnetic circuit, the axis of which is referenced 18.
  • the secondary turns of the transformer thus produced are connected in parallel using portions of wires 23, 24 to reduce the current flowing in the turns 19 to 22.
  • a voltage V2 is thus obtained at the secondary when the primary and secondary turns are nested one inside the other.
  • the main drawback of this type of transformer is that the secondary turns are connected in parallel by welding and therefore limits the high-frequency performance.
  • a wire connection also leads to heterogeneity in the secondary current flows.
  • the parallel connection of the turns secondary is difficult to achieve, given the size of these turns and the distance between them once the insulating sheet is folded and fixed in the carcass of the magnetic circuit.
  • This heterogeneous connection principle is also found in transformers made up of open turns mounted in a box constituting the magnetic core, the connections of the turns being carried out using conductive tracks of an electronic card on which the magnetic core is fixed.
  • the part of turns produced by the printed circuit is not in the same plane as the rest of the turn and the yield is therefore affected. Connecting one turn to the other further increases the length of the transformer secondary connections.
  • the present invention aims in particular to overcome these drawbacks.
  • one of the objectives of the invention is to provide a transformer winding which allows the turns of this winding to be simply paralleled, which reduces the connection lengths outside the useful zones of the turns, these connections can be homogeneously, that is to say without additional soldering or connections.
  • Another object of the invention is to simplify the manufacturing process of such a winding and therefore of a transformer using such a winding.
  • An additional objective is to limit the volumes of insulator of such a transformer, in order to reduce its size, while ensuring optimal nesting of the primary and secondary turns.
  • a transformer winding of the type consisting of an insulating tape comprising on one of its sides patterns consisting of strips of electrically conductive material, the ribbon insulator being folded in an accordion, to constitute the winding, according to equidistant separation lines delimiting faces of the insulating tape, each pattern included between two separation lines constituting a turn of the winding, this winding being characterized in that this side of the tape comprises alternately a face with a pattern and a face without a pattern, each pattern comprising two paralleling legs extending each of its ends beyond a dividing line to extend over the face without a pattern so that the matching legs parallel of each pattern come into electrical contact with the ends of the neighboring pattern when the insulating tape is folded in accordion, so as to achieve a parallelization of the patterns.
  • the invention also relates to a transformer winding consisting of an insulating tape alternately comprising two faces carrying a group of two patterns in series and two non-patterned faces comprising connecting tabs of the groups of patterns, the connecting tabs extending from on either side of the dividing line delimiting the two faces without pattern, each group of patterns comprising two parallel tabs extending each of its ends beyond the dividing line located between the two patterns of the group, the lugs for paralleling each group of patterns coming into electrical contact with the ends of the group of neighboring patterns by means of the connecting lugs when the insulating tape is folded in accordion fashion, so as to bring the groups of motives.
  • one of the windings as identified above constitutes one of the windings of a transformer, the other side of the insulating tape comprising patterns constituting the other winding of the transformer when the insulating tape is folded in accordion. This provides optimal nesting of primary and secondary and minimized footprint.
  • the invention also relates to a transformer produced from such a winding.
  • FIG. 2 represents an insulating tape comprising, on one of its sides, patterns made of electrically conductive material, according to an embodiment of the invention.
  • An insulating tape 25, of which only a part is shown, has on one of its sides patterns 26, 27 of electrically conductive material. These patterns are for example produced by a chemical etching process.
  • the insulating tape 25 is for example in capton and the patterns 26, 27 in copper.
  • the ribbon 25 is intended to be folded along equidistant separation lines P1, P2, P3. Each pattern 26, 27 corresponds to a turn of the winding produced by folding the ribbon 25, as will be explained below.
  • paralleling tabs 28, 29, 30, 31 each extend patterns 26, 27 of the ribbon 25, this extension being carried out up to beyond the separation lines P1 and P3, so that the paralleling tabs 28 and 29, extending the ends of the pattern 26, come into contact after folding the ribbon 25 with the ends 32 and 33 of the pattern 27.
  • This comparison of the patterns will be better understood on reading the following description of FIG. 3.
  • FIG. 3 represents the folding in accordion of the ribbon of FIG. 2.
  • Accordion folding of the insulating tape 25 is carried out according to the folds P1 to P3, each folding being carried out in the opposite direction to the previous one.
  • the face 34 comprises the turn 26, the face 35 the paralleling lugs 28, 29 of the turn 26, the face 36 the turn 27 and the face 37 the paralleling lugs 30, 31 of the turn 27.
  • the faces 34, 36 comprising patterns are alternated with faces 35, 37 without pattern.
  • the legs 30 and 31 for paralleling the turn 27 likewise come into contact with the ends of a turn situated on a face with which the face 37 comes into contact by folding. It is thus possible to bring in parallel a large number of unitary turns of a transformer winding.
  • Figure 4 is a side view of the insulating tape of Figures 2 and 3 fully folded.
  • the folding accordion ensures the parallelization of the turns 26 and 27. Access to the windings of the winding is easy, since at the folds P1 and P3 the conductive tracks are visible.
  • the turns of the ribbon can either be kept in contact by pressure in a transformer, or welded after folding to ensure optimal contact between the turns.
  • the insulating tape is in capton and measures between 50 and 75 ⁇ m in thickness and the copper has a thickness of approximately 75 ⁇ m.
  • FIG. 5 is an exemplary embodiment of a grouping of groups of two turns in series.
  • the insulating tape 25 comprises screen-printed patterns consisting of two turns in series.
  • the faces 50, 51, 54 and 55 each have a turn, respectively referenced 56, 57, 58 and 59.
  • the turns 56 and 57 are in series, as well as the neighboring turns 58 and 59, this placing of the turns in series being provided by conductive tracks.
  • the faces 52 and 53 of the ribbon 25 only comprise connecting lugs 60, 61 extending on either side of the fold P6.
  • the turns 56 and 57 form a group of turns whose ends are extended by paralleling lugs 62 and 63 extending beyond the fold P4 in opposite directions.
  • the paralleling tab 62 comes into contact with the part of the connecting tab 60 located on the face 52 and the part of the connecting tab 60 located on the face 53 comes into contact with the end of the coil 58.
  • the paralleling tab 65 of the face 54 which comes into contact with the end of the coil 57 through the connecting tab 61.
  • the number of series turns in a group is not limited to two. Different configurations of the turns allow paralleling of groups made up of a large number of turns in series.
  • the insulations between the turns are also automatically obtained by accordion-folding of the ribbon, since the faces 52 and 53 do not include a pattern constituting a turn.
  • the non-referenced holes drilled in the center of each face allow the passage of a magnetic circuit. These orifices are also present, but not shown in the first embodiment (fig. 2 and 3).
  • the protrusion of the fold by lugs in parallel can also be used for the series of turns.
  • This embodiment also allows a reduction in the lengths of the conductors. The reasons present more complex forms, however. It is then necessary to isolate certain copper surfaces to avoid short circuits, resulting in a more complex winding.
  • the ribbon 25 comprising the patterns constituting turns is intended to be nested with another ribbon.
  • This other strip may for example comprise turns in series, and constitute the primary of a transformer, the secondary being produced by placing turns in parallel in accordance with the invention.
  • This known embodiment however has the disadvantage of having a variable yield, depending on whether the interweaving of the ribbons is more or less well performed.
  • the primary and secondary of the transformer are preferably made on the same insulating tape.
  • One side of the insulating tape comprises the turns constituting the primary winding and the other side those constituting the secondary winding.
  • Figures 6 and 7 show the two sides of such an insulating tape.
  • the patterns are placed in series by extending the conductive tracks from one pattern to another.
  • Each pattern consists of a turn which will be crossed by a cylindrical bar constituting the magnetic circuit.
  • the ribbon 25 is intended to be folded according to the folds P10 to P15.
  • the opposite side of the ribbon 25 includes the patterns shown in Figure 7. These patterns are intended to be connected in parallel by folding and consist of unitary turns.
  • the folds P10 to P15 produced allow the paralleling tabs to extend beyond the ends of the patterns in FIG. 7.
  • the patterns of FIG. 7 are opposite a pattern, each of the two patterns in FIG. 6.
  • the folds P10, P12, P13 and P15 are accessible from the outside of the transformer, in particular for carrying out a welding operation of the turns if the tape is not sufficient compressed, to ensure sufficient and permanent contact of the superimposed turns.
  • the transformer winding according to the invention therefore allows a maximum reduction in the lengths of the conductors, essential when the working frequencies are high, an absence of solder connections when the folded ribbon is sufficiently compressed, a simplification of the transformer assembly and limitation of insulation volumes.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Organic Insulating Materials (AREA)
  • Insulated Conductors (AREA)
  • Insulating Of Coils (AREA)

Claims (4)

  1. Transformatorwicklung aus einem Isolierband (25), das auf einer seiner Seiten Motive (26, 27) aus Bändern elektrisch leitenden Materials trägt und entlang Trennlinien (P1-P3) gleichen Abstands, die Teilflächen des Isolierbands (25) begrenzen, zickzackförmig gefaltet ist, um die Wicklung zu bilden, wobei jedes zwischen zwei Trennlinien (P2, P3) liegende Motiv (26, 27) eine Windung der Wicklung bildet, dadurch gekennzeichnet, daß diese Seite des Bands abwechselnd eine Teilfläche (34; 36) mit Motiv (26; 27) und eine Teilfläche (35; 37) ohne Motiv aufweist und daß jedes Motiv (26, 27) zwei Ansätze (28, 29; 30, 31) zur Parallelschaltung besitzt, die jedes Ende eines Motivs über eine Trennlinie (P1, P3) hinaus verlängern und auf die Teilfläche (35; 37) ohne Motiv überstehen, so daß die Ansätze (28, 29; 30, 31) zur Parallelschaltung jedes Motivs (26; 27) mit den Enden des nächstfolgenden Motivs (26, 27) in elektrischen Kontakt gelangen, wenn das Isolierband (25) zickzackförmig gefaltet wird, um so eine Parallelschaltung der Motive (26, 27) herzustellen.
  2. Transformatorwicklung aus einem Isolierband (25), das auf einer seiner Seiten Motive (56, 57, 58, 59) aus Bändern aus elektrisch leitenden Materials trägt, wobei die Wicklung erhalten wird, indem das Isolierband (25) entlang Trennlinien (P4-P9) gleichen Abstands, die die Teilflächen (50-55) des Isolierbands (25) begrenzen, zickzackförmig gefaltet wird, wobei jedes zwischen zwei Trennlinien (P4-P9) liegende Motiv (56, 57, 58, 59) eine Windung der Wicklung bildet, dadurch gekennzeichnet, daß die Seite abwechselnd zwei Teilflächen (50, 51; 54, 55) mit einer Gruppe von zwei Motiven (56, 57; 58, 59) in Reihe und zwei Teilflächen (52, 53) ohne Motiv nur mit Ansätzen (60, 61) zur Verbindung der Gruppen von Motiven (56, 57; 58, 59) besitzt, daß die Ansätze (60, 61) sich zu beiden Seiten der Trennlinie (P6) erstrecken, die sich zwischen zwei Teilflächen (52, 53) ohne Motiv befindet, daß jede Gruppe von Motiven (56, 57; 58, 59) zwei Ansätze (62, 63; 64, 65) für die Parallelschaltung aufweist, die jedes Ende eines Motivs über die Trennlinie (P4; P8) hinaus verlängern, die sich zwischen den beiden Motiven (56, 57; 58, 59) der Gruppe befindet, daß die Ansätze (62, 63; 64, 65) jeder Motivgruppe mit den Enden der benachbarten Motivgruppe (56, 57; 58, 59) über die Verbindungsansätze (60, 61) in elektrischen Kontakt treten, wenn das Isolierband (25) zickzackförmig gefaltet wird, um eine Parallelschaltung der Motivgruppen (56, 57; 58, 59) zu erhalten.
  3. Wicklung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß sie eine der Wicklungen eines Transformators bildet, wobei die andere Seite des Isolierbands (25) Motive aufweist, die die andere Wicklung des Transformators bilden, wenn das Isolierband (25) zickzackförmig gefaltet wird.
  4. Transformator, dadurch gekennzeichnet, daß er eine Wicklung gemäß einem der Ansprüche 1 bis 3 aufweist.
EP92111885A 1991-07-17 1992-07-13 Transformatorwicklung bestehend aus einem Isolierband mit elektrisch leitfähigen Mustern zum Parallelschalten von den Mustern beim zickzackförmigen Falten dieses Isolierbandes Expired - Lifetime EP0523588B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109037 1991-07-17
FR9109037A FR2679374B1 (fr) 1991-07-17 1991-07-17 Bobinage de transformateur constitue d'un ruban isolant comportant des motifs electriquement conducteurs.

Publications (2)

Publication Number Publication Date
EP0523588A1 EP0523588A1 (de) 1993-01-20
EP0523588B1 true EP0523588B1 (de) 1996-12-11

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EP92111885A Expired - Lifetime EP0523588B1 (de) 1991-07-17 1992-07-13 Transformatorwicklung bestehend aus einem Isolierband mit elektrisch leitfähigen Mustern zum Parallelschalten von den Mustern beim zickzackförmigen Falten dieses Isolierbandes

Country Status (9)

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US (1) US5276421A (de)
EP (1) EP0523588B1 (de)
JP (1) JP2518777B2 (de)
AT (1) ATE146298T1 (de)
DE (1) DE69215777T2 (de)
DK (1) DK0523588T3 (de)
ES (1) ES2094854T3 (de)
FR (1) FR2679374B1 (de)
IE (1) IE77516B1 (de)

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JP2773617B2 (ja) * 1993-12-17 1998-07-09 株式会社村田製作所 バルントランス
US5381124A (en) * 1993-12-29 1995-01-10 General Electric Company Multi-turn z-foldable secondary winding for a low-profile, conductive film transformer
US5477204A (en) * 1994-07-05 1995-12-19 Motorola, Inc. Radio frequency transformer
DE4428732C1 (de) * 1994-08-15 1996-01-04 Angewandte Digital Elektronik Mehrlagige Chipkartenspulen für kontaktfreie Chipkarten
US5570074A (en) * 1995-05-30 1996-10-29 General Electric Company Very low leakage inductance, single-laminate transformer
WO1997021231A1 (en) * 1995-12-05 1997-06-12 Smith's Industries Aerospace & Defense Systems, Inc. Flexible lead electromagnetic coil assembly
US6087922A (en) * 1998-03-04 2000-07-11 Astec International Limited Folded foil transformer construction
GB0027007D0 (en) * 2000-11-04 2000-12-20 Profec Technologies Oy Inductive components
DE60101325D1 (de) * 2001-06-21 2004-01-08 Magnetek Spa Kreisförmige Flachspulen sowie induktives Bauelement, welches mit einer oder mehreren dieser Spulen hergestellt wird
FI20012052A0 (fi) * 2001-10-23 2001-10-23 Mika Matti Sippola Menetelmä monikerrosrakenteen valmistamiseksi
US6831835B2 (en) * 2002-12-24 2004-12-14 Ault, Inc. Multi-layer laminated structures, method for fabricating such structures, and power supply including such structures
US20040120129A1 (en) * 2002-12-24 2004-06-24 Louis Soto Multi-layer laminated structures for mounting electrical devices and method for fabricating such structures
US7193307B2 (en) * 2004-03-25 2007-03-20 Ault Incorporated Multi-layer FET array and method of fabricating
GB0523969D0 (en) * 2005-11-25 2006-01-04 Zarlink Semiconductor Ltd Inductivwe component
JP5139685B2 (ja) * 2007-01-26 2013-02-06 パナソニック株式会社 積層素子
CN101647183B (zh) * 2007-03-29 2013-04-24 弗莱克斯电子有限责任公司 一种电源设备及其调节方法
CN102194565A (zh) * 2010-03-11 2011-09-21 康舒科技股份有限公司 变压器的绕组结构
DE102011003754A1 (de) * 2011-02-08 2012-08-09 Bolzenschweißtechnik Heinz Soyer GmbH Transformator und Wicklungselement zum Bilden eines Wicklungspakets hierfür
US20140347154A1 (en) * 2013-05-21 2014-11-27 Coherent, Inc. Interleaved planar pcb rf transformer
US20180268986A1 (en) * 2017-03-20 2018-09-20 Thomas Karl Marchese Construction of an inductor/ transformer using flexible interconnect
JP2019009327A (ja) * 2017-06-27 2019-01-17 イビデン株式会社 コイル
JP2020145370A (ja) * 2019-03-08 2020-09-10 イビデン株式会社 プレーナトランス
FR3103625B1 (fr) * 2019-11-22 2021-11-12 Zodiac Aero Electric Bobinage, procédé de réalisation correspondant et aéronef comportant un tel bobinage

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Also Published As

Publication number Publication date
EP0523588A1 (de) 1993-01-20
DK0523588T3 (da) 1997-03-03
JPH06188129A (ja) 1994-07-08
IE922321A1 (en) 1993-01-27
DE69215777D1 (de) 1997-01-23
FR2679374B1 (fr) 1993-12-31
JP2518777B2 (ja) 1996-07-31
ES2094854T3 (es) 1997-02-01
IE77516B1 (en) 1997-12-17
ATE146298T1 (de) 1996-12-15
DE69215777T2 (de) 1997-04-03
FR2679374A1 (fr) 1993-01-22
US5276421A (en) 1994-01-04

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