EP1293995A2 - Inductive electronic flat-type component, in particular planar transformer or planar inductor - Google Patents

Inductive electronic flat-type component, in particular planar transformer or planar inductor Download PDF

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Publication number
EP1293995A2
EP1293995A2 EP02020299A EP02020299A EP1293995A2 EP 1293995 A2 EP1293995 A2 EP 1293995A2 EP 02020299 A EP02020299 A EP 02020299A EP 02020299 A EP02020299 A EP 02020299A EP 1293995 A2 EP1293995 A2 EP 1293995A2
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EP
European Patent Office
Prior art keywords
winding elements
winding
insulation
electronic component
inductive electronic
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.)
Granted
Application number
EP02020299A
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German (de)
French (fr)
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EP1293995A3 (en
EP1293995B1 (en
Inventor
Christoph Gulden
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STS
Sts Spezial-Transformatoren-Stockach & Co GmbH
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STS
Sts Spezial-Transformatoren-Stockach & Co GmbH
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Publication of EP1293995A2 publication Critical patent/EP1293995A2/en
Publication of EP1293995A3 publication Critical patent/EP1293995A3/en
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Publication of EP1293995B1 publication Critical patent/EP1293995B1/en
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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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • 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
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • 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
    • H01F5/00—Coils
    • H01F5/06—Insulation of windings

Definitions

  • the invention relates to an inductive electronic component in Planar construction, in particular a planar transformer or a Planar coil, with a winding package, which one or more planar Has windings, the windings from each other lying, flat and conductive, by insulating foils from each other separate, winding elements are formed, which around a winding core to be ordered.
  • winding elements in planar transformers and coils are insulated one above the other, with those assigned to the individual windings Winding elements in series connection electrically conductive with each other are connected.
  • the winding elements each comprise two electrical connections.
  • transformers which are usually one Have primary winding and at least one secondary winding, the Connections of the primary and secondary windings opposite each other executed.
  • Transformers and coils of this type are used, for example, in Switching power supplies are used and at switching frequencies from a few tens to several hundred kilohertz. Due to the high switching frequencies the number of winding elements and the size of the transformer or the coil can be kept small.
  • planar transformer or planar coil important by the responsible security authorities, such as V.D.E. (Germany), U.L. (USA), C.S.A (Canada) Safety criteria regarding the minimum clearances and creepage distances as well Insulation thicknesses between the individual winding elements and the core observed.
  • the air and creepage distances as well as the insulation thicknesses depend on the Rated voltage. For example, at a rated voltage of 300 volts for a safe separation between the winding elements as well as the winding elements and the core air gaps of 5.5 mm and Adhere to creepage distances of 6 mm.
  • the insulation thickness between the individual winding elements must be fixed depending on the application Insulation 1.0 mm and for multi-layer (3-layer) insulation a total of 0.3 mm.
  • transformers therefore comprise winding elements from one insulating film on which electrically conductive tracks are applied. At least one of the windings is in a closed housing led to maintain the prescribed creepage distances. additionally the conductor tracks are at a sufficient distance from the edge of the insulating foils arranged.
  • This type of isolation is e.g. in EP-B-0 542,445.
  • the disadvantage here is that due to the housing and the Distance of the conductor tracks to the film edge actually for the conductor tracks available changing window width is not fully used can be.
  • the object of the invention is an inductive electronic Component in planar construction, in particular a planar transformer or a planar coil of the type mentioned, with an insulation system provided that the prescribed safety requirements and a compact design of the transformer or coil at high Power density allows.
  • the insulation foils are dimensioned in such a way that the insulation, air and creepage distances prescribed by the responsible safety authorities are observed.
  • the term "film” should not be viewed as restrictive.
  • the insulation foils can be made of any suitable insulation material, preferably plastics such as polyester, PEN, polyamide, Nomex, are used.
  • the choice of insulation material depends on the requirements of the component (temperature resistance, UL approval, price, etc.).
  • the advantage of the invention can be seen in the fact that the prescribed insulation criteria are met without the need for special coil formers which ensure the insulation. Furthermore, the existing changing window width can be fully used.
  • the Dimensions of the insulation films in some areas the dimensions of the Winding elements and go in the other areas over the Dimensions of the winding elements, i.e. they are in them Subareas over the outer edges of the winding elements.
  • Winding elements can e.g. the following adhesive tapes are used: Polyester adhesive tape, PEN adhesive tape (Kaladex 2000), polyimide adhesive tape (Kapton). These are common, in transformer and Spulenbau used insulation adhesive tapes.
  • the insulation foils can be constructed in one layer as well as consist of several individual foil layers. Multiple layers have the advantage that the total insulation thickness required is reduced.
  • the winding elements are designed as essentially rectangular or oval, open conductor loops, each with two long legs and two short legs. The insulation foils, in particular in the area of the short legs, extend beyond the outer dimensions of the winding elements and ensure compliance with the insulation and creepage distances.
  • Invention can be provided that the winding package in the long Leg of the winding elements with several layers of an insulation film is wrapped.
  • the winding elements preferably consist of conductor plates, in particular from copper sheet.
  • the winding elements can also be made of a flat insulator with an applied conductive layer.
  • Figure 1 shows a view of a typical winding element, which preferably consists of a copper sheet.
  • the winding element 1 is in the Essentially designed and possessed as a rectangular or oval conductor loop each two, approximately parallel long legs 2, 3 and two mutually parallel short legs 4, 5.
  • Each winding element has 1 connections 6, 7 for winding elements. When several winding elements are stacked on top of each other, they come Connections 6, 7 lie exactly one above the other and allow a simple one Contacting the winding elements 1 with each other. The connections of the other winding are carried out opposite.
  • an insulation film 9 is introduced, as shown in FIG. 3 is shown.
  • the shape of the insulation foil corresponds approximately to that Winding elements 1.
  • the areas 10 of the insulation film 9 are approximately like this broad as the long legs 2, 3 of the winding elements 1, wherein however, the areas 11 are wider and longer, and in particular in the area of the short legs 4, 5, over the outer edges of the Stand out winding elements 1.
  • FIG. 4 shows a winding element 1 flanged with adhesive tape 8, which is placed on an insulation film 9.
  • the Insulation film 9 z. B. at the edges 12, 13 and 14 of the winding element 1 protrudes beyond these edges by a distance s.
  • This supernatant forms again the prescribed creepage distance of 2 x s between two superimposed winding elements 1.
  • the winding core 15, the two, in cross-section approximately E-shaped, core halves, is between the introduced winding package consisting of several winding elements 1, so that two legs of the core left and right of the long legs 2, 3 of the winding package and the middle leg of the core 15 lies in the interior of the winding package.
  • the supernatant of the Insulation film 9 on the edges 12 and 14 of the winding element 1 is a Corresponding insulation distance of 1 x s to the core 15 and 2 x s between the winding elements 1 ensured.
  • FIG. 5 shows a cross section through a long leg 2 of the finished Winding package. You can see the one on top of the other Winding elements 1, between each of which an insulating film 9 is arranged is.
  • the winding elements 1 are provided with an adhesive film 8 on their outer edges umbördelt.
  • the insulation foils 9 have a certain thickness d to the prescribed insulation distance between the respective Ensure winding elements 1.
  • On the outer edges of the Winding elements 1 only the flanged adhesive film 8 acts as insulation. Out for this reason, the outer legs of the winding package are additional wrapped with several layers of insulation film 16.
  • FIG. 6 shows an assembly aid 17 for assembling the Winding package shown.
  • the assembly aid consists of a flat one Base plate and several, from the base plate vertically upwards standing assembly mandrels 18 to 20.
  • the inner assembly mandrels 18 are of this type arranged that they in the interior of the winding elements 1 and the Intervene insulation foils 9. This will make the one on top of the other Layers of winding elements 1 and insulating foils aligned with each other.
  • the mounting mandrels 19 are arranged so that they are in the solder holes Connections 6, 7 of the winding elements 1 engage and thus ensure a further precise alignment of the winding elements.
  • the assembly mandrels 20 are used to align winding elements 1 with different designs Connections and solder holes.
  • FIG. 7 finally shows a top view of an inventive Transformer, the upper half of the winding core 15 of the overview is not shown for the sake of it. That surrounding the winding core 15 Winding package 21 comprises connections 22 led out opposite one another, 23 for the respective primary and secondary windings.

Abstract

The inductive electronic component has a winding packet with one or windings with stacked flat conducting winding elements (1) separated by insulating foil and wound on a core. The edges of the winding elements are fully or partly beaded with insulating adhesive foil or the winding elements are essentially completely enclosed by insulating adhesive foil.

Description

Die Erfindung betrifft ein induktives elektronisches Bauelement in Planarbauweise, insbesondere einen Planartransformator oder eine Planarspule, mit einem Wicklungspaket, welches eine oder mehrere planare Wicklungen aufweist, wobei die Wicklungen jeweils aus übereinander liegenden, flachen und leitfähigen, durch Isolationsfolien voneinander getrennten, Wicklungselementen gebildet sind, welche um einen Wicklungskern angeordnet werden.The invention relates to an inductive electronic component in Planar construction, in particular a planar transformer or a Planar coil, with a winding package, which one or more planar Has windings, the windings from each other lying, flat and conductive, by insulating foils from each other separate, winding elements are formed, which around a winding core to be ordered.

Die Wicklungselemente bei planaren Transformatoren und Spulen liegen isoliert übereinander, wobei die den einzelnen Wicklungen zugeordneten Wicklungselemente in Serienschaltung elektrisch leitend miteinander verbunden sind. Hierzu umfassen die Wicklungselemente jeweils zwei elektrische Anschlüsse. Bei Transformatoren, die in der Regel eine Primärwicklung und mindestens eine Sekundärwicklung aufweisen, werden die Anschlüsse der Primär- und Sekundärwicklungen jeweils gegenüberliegend ausgeführt.The winding elements in planar transformers and coils are insulated one above the other, with those assigned to the individual windings Winding elements in series connection electrically conductive with each other are connected. For this purpose, the winding elements each comprise two electrical connections. For transformers, which are usually one Have primary winding and at least one secondary winding, the Connections of the primary and secondary windings opposite each other executed.

Transformatoren und Spulen dieser Bauart werden zum Beispiel in Schaltnetzteilen verwendet und bei Schaltfrequenzen von einigen zehn bis einigen hundert Kilohertz betrieben. Durch die hohen Schaltfrequenzen können die Anzahl der Wicklungselemente und die Baugröße des Transformators bzw. der Spule klein gehalten werden.Transformers and coils of this type are used, for example, in Switching power supplies are used and at switching frequencies from a few tens to several hundred kilohertz. Due to the high switching frequencies the number of winding elements and the size of the transformer or the coil can be kept small.

Insbesondere wenn hohe Spannungen verwendet werden, ist es bei der geringen Baugröße eines Planartransformators bzw. Planarspule wichtig, die von den jeweils zuständigen Sicherheitsbehörden, wie z.B. V.D.E. (Deutschland), U.L. (USA), C.S.A (Kanada), vorgeschriebenen Sicherheitskriterien betreffend die minimalen Luft- und Kriechstrecken sowie Isolationsdicken zwischen den einzelnen Wicklungselementen und dem Kern einzuhalten.Especially when high voltages are used, it is with the small size of a planar transformer or planar coil important by the responsible security authorities, such as V.D.E. (Germany), U.L. (USA), C.S.A (Canada) Safety criteria regarding the minimum clearances and creepage distances as well Insulation thicknesses between the individual winding elements and the core observed.

Die Luft- und Kriechstrecken sowie die Isolationsdicken sind abhängig von der Bemessungsspannung. Beispielsweise sind bei einer Bemessungsspannung von 300 Volt für eine sichere Trennung zwischen den Wicklungselementen sowie den Wicklungselementen und dem Kern Luftstrecken von 5,5 mm und Kriechstrecken von 6 mm einzuhalten. Die Isolationsdicke zwischen den einzelnen Wicklungselementen muss je nach Anwendung bei einer festen Isolation 1,0 mm und bei einer mehrlagigen (3-lagigen) Isolation insgesamt 0,3 mm betragen.The air and creepage distances as well as the insulation thicknesses depend on the Rated voltage. For example, at a rated voltage of 300 volts for a safe separation between the winding elements as well as the winding elements and the core air gaps of 5.5 mm and Adhere to creepage distances of 6 mm. The insulation thickness between the individual winding elements must be fixed depending on the application Insulation 1.0 mm and for multi-layer (3-layer) insulation a total of 0.3 mm.

Bekannte Transformatoren umfassen daher Wicklungselemente aus einer isolierenden Folie, auf die elektrisch leitende Bahnen aufgebracht sind. Mindestens eine der Wicklungen wird in einem geschlossenen Gehäuse geführt, um die vorgeschriebenen Kriechstrecken einzuhalten. Zusätzlich werden die Leiterbahnen in einem ausreichenden Abstand zum Rand der isolierenden Folien angeordnet. Diese Art der Isolation ist z.B. in der EP-B-0 542 445 offenbart. Nachteilig hierbei ist, dass aufgrund des Gehäuses und dem Abstand der Leiterbahnen zur Folienkante die für die Leiterbahnen eigentlich zur Verfügung stehende Wickelfensterbreite nicht vollständig ausgenutzt werden kann.Known transformers therefore comprise winding elements from one insulating film on which electrically conductive tracks are applied. At least one of the windings is in a closed housing led to maintain the prescribed creepage distances. additionally the conductor tracks are at a sufficient distance from the edge of the insulating foils arranged. This type of isolation is e.g. in EP-B-0 542,445. The disadvantage here is that due to the housing and the Distance of the conductor tracks to the film edge actually for the conductor tracks available changing window width is not fully used can be.

Eine andere Möglichkeit zur Einhaltung der Isolations- und Kriechstrecken sieht vor, spezielle Spulenkörper mit Isolationskammern zu verwenden, in welchen die Wicklungselemente aufgenommen sind. Dies ist in den Schriften EP-B-0 476 114 oder der EP-A-0 933 789 gezeigt. Bei dieser Lösung müssen spezielle Spulenkörper hergestellt werden, was höhere Kosten nach sich zieht. Zudem ist keine starke Verschachtelung der Wicklungselemente möglich, was zu Lasten der Baugröße geht. Another way to comply with the insulation and creepage distances propose to use special bobbins with isolation chambers in which the winding elements are included. This is in EP-B-0 476 114 or EP-A-0 933 789. This solution requires special Coil formers are produced, which entails higher costs. In addition is no strong nesting of the winding elements possible, which is a burden the size goes.

Die Aufgabe der Erfindung besteht darin, ein induktives elektronisches Bauelement in Planarbauweise, insbesondere einen Planartransformator oder eine Planarspule der eingangs genannten Art, mit einem Isolationssystem zu versehen, das die vorgeschriebenen Sicherheitsanforderungen erfüllt und eine kompakte Bauweise des Transformators bzw. der Spule bei hoher Leistungsdichte zulässt.The object of the invention is an inductive electronic Component in planar construction, in particular a planar transformer or a planar coil of the type mentioned, with an insulation system provided that the prescribed safety requirements and a compact design of the transformer or coil at high Power density allows.

Diese Aufgabe wird durch die im Patentanspruch 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in claim 1 solved.

Erfindungsgemäß ist vorgesehen, dass die Isolationsfolien derart dimensioniert sind, dass die von den zuständigen Sicherheitsbehörden vorgeschriebenen Isolations-, Luft- und Kriechstrecken eingehalten werden. Hierbei ist der Begriff "Folie" nicht beschränkend anzusehen. Die Isolationsfolien können aus jedem geeigneten Isolationsmaterial gefertigt sein, wobei vorzugsweise Kunststoffe, wie z.B. Polyester, PEN, Polyamid, Nomex, eingesetzt werden. Die Wahl des Isolationsmaterials richtet sich nach den Anforderungen des Bauteils (Temperaturbeständigkeit, UL-Zulassung, Preis, etc.).
Der Vorteil der Erfindung ist darin zu sehen, dass die vorgeschriebenen Isolationskriterien erfüllt werden, ohne dass spezielle Spulenkörper notwendig sind, welche die Isolation sicherstellen. Ferner kann die vorhandene Wickelfensterbreite voll ausgenutzt werden.According to the invention, it is provided that the insulation foils are dimensioned in such a way that the insulation, air and creepage distances prescribed by the responsible safety authorities are observed. The term "film" should not be viewed as restrictive. The insulation foils can be made of any suitable insulation material, preferably plastics such as polyester, PEN, polyamide, Nomex, are used. The choice of insulation material depends on the requirements of the component (temperature resistance, UL approval, price, etc.).
The advantage of the invention can be seen in the fact that the prescribed insulation criteria are met without the need for special coil formers which ensure the insulation. Furthermore, the existing changing window width can be fully used.

Zudem kann mit einer relativ dünnen Isolation gearbeitet werden, so dass eine hohe Verschachtelungstiefe und eine minimale Streuinduktivität erreicht wird und außerdem Stromverdrängungseffekte, insbesondere Skin- und Proximityeffekt, minimiert werden.In addition, you can work with a relatively thin insulation, so that a high nesting depth and minimal leakage inductance is achieved and also current displacement effects, especially skin and Proximity effect, can be minimized.

In einer bevorzugten Ausgestaltung der Erfindung entsprechen die Abmessungen der Isolationsfolien in Teilbereichen den Abmessungen der Wicklungselemente und gehen in den übrigen Teilbereichen über die Abmessungen der Wicklungselemente hinaus, d.h., sie stehen in diesen Teilbereichen über die Außenkanten der Wicklungselemente über.In a preferred embodiment of the invention, the Dimensions of the insulation films in some areas the dimensions of the Winding elements and go in the other areas over the Dimensions of the winding elements, i.e. they are in them Subareas over the outer edges of the winding elements.

Durch diese überstehenden Kanten der Isolationsfolie werden die benötigten Isolationsstrecken und Kriechstrecken in den entsprechenden Teilbereichen der Wicklungselemente sichergestellt.These protruding edges of the insulation film make the necessary ones Insulation distances and creepage distances in the corresponding sections of the Winding elements ensured.

Die Außenkanten der Teilbereiche der Wicklungselemente, an denen die Isolationsfolie nicht übersteht, werden erfindungsgemäß mit einer isolierenden Klebefolie umbördelt. Die entsprechenden Teilbereiche der Wicklungselemente können auch ganz mit Klebefolie umgeben werden. Zum Umbördeln der Wicklungselemente können z.B. folgende Klebebänder verwendet werden: Polyesterklebeband, PEN-Klebeband(Kaladex 2000), Polyimidklebeband (Kapton). Es handelt sich dabei um gängige, im Transformatoren- und Spulenbau verwendete Isolationsklebebänder.The outer edges of the sections of the winding elements on which the Insulation film does not survive, according to the invention with an insulating Flanged adhesive film. The corresponding sub-areas of the winding elements can also be completely surrounded with adhesive film. For flanging the Winding elements can e.g. the following adhesive tapes are used: Polyester adhesive tape, PEN adhesive tape (Kaladex 2000), polyimide adhesive tape (Kapton). These are common, in transformer and Spulenbau used insulation adhesive tapes.

Die Isolationsfolien können sowohl einlagig aufgebaut sein als auch aus mehreren einzelnen Folienlagen bestehen. Mehrere Lagen haben den Vorteil, dass sich die insgesamt notwendige Isolationsdicke verringert.
Die Wicklungselemente sind als im Wesentlichen rechteckige oder ovale, offene Leiterschleifen ausgebildet, mit jeweils zwei langen Schenkeln und zwei kurzen Schenkeln. Die Isolationsfolien stehen insbesondere im Bereich der kurzen Schenkel über die Außenabmessungen der Wicklungselemente hinaus und sorgen dort für die Einhaltung der Isolations- und Kriechstrecken.The insulation foils can be constructed in one layer as well as consist of several individual foil layers. Multiple layers have the advantage that the total insulation thickness required is reduced.
The winding elements are designed as essentially rectangular or oval, open conductor loops, each with two long legs and two short legs. The insulation foils, in particular in the area of the short legs, extend beyond the outer dimensions of the winding elements and ensure compliance with the insulation and creepage distances.

Da zwischen den Kanten der Wicklungselemente und dem Kern nur eine relativ dünne Isolierung vorhanden ist, kann in einer bevorzugten Ausgestaltung der Erfindung vorgesehen sein, dass das Wicklungspaket im Bereich der langen Schenkel der Wicklungselemente mit mehreren Lagen einer Isolationsfolie umwickelt ist. Since only one relative between the edges of the winding elements and the core thin insulation is present, can in a preferred embodiment Invention can be provided that the winding package in the long Leg of the winding elements with several layers of an insulation film is wrapped.

Die Wicklungselemente bestehen vorzugsweise aus Leitungsblechen, insbesondere aus Kupferblech. Die Wicklungselemente können aber auch aus einem flachen Isolator mit einer aufgebrachten leitfähigen Schicht bestehen.The winding elements preferably consist of conductor plates, in particular from copper sheet. The winding elements can also be made of a flat insulator with an applied conductive layer.

Ein Ausführungsbeispiel der Erfindung wird nun anhand der Zeichnungsfiguren beschrieben. Es kann sich dabei sowohl um einen Transformator als auch eine Spule handeln, da deren Aufbau sich grundsätzlich nicht wesentlich voneinander unterscheidet. Aus den Zeichnungen und deren Beschreibung ergeben sich weitere Merkmale, Vorteile und Ausgestaltungen der Erfindung.An embodiment of the invention will now be based on the drawing figures described. It can be both a transformer and a Act coil, because their structure is fundamentally not essential different from each other. From the drawings and their description there are further features, advantages and refinements of the invention.

Es zeigen:

Figur 1:
eine Draufsicht auf ein Wicklungselement des Wickelkörpers;
Figur 2:
ein Wicklungselement gemäß Figur 1 mit umbördelten (abgeklebten) Kanten;
Figur 3:
eine Draufsicht auf eine Isolationsfolie;
Figur 4:
ein auf eine Isolationsfolie aufgelegtes Wicklungselement mit umbördelten Kanten und eingelegtem Ferritkern;
Figur 5:
einen Querschnitt durch einen langen Schenkel eines fertigen Wicklungspakets;
Figur 6:
eine Draufsicht auf eine Montagehilfe zur Montage des Wicklungspakets mit eingelegter Isolationsfolie;
Figur 7:
den Aufbau eines planaren Transformators gemäß der Erfindung in einer Aufsicht.
Show it:
Figure 1:
a plan view of a winding element of the winding body;
Figure 2:
a winding element according to Figure 1 with flanged (taped) edges;
Figure 3:
a plan view of an insulation film;
Figure 4:
a winding element placed on an insulation film with flanged edges and inserted ferrite core;
Figure 5:
a cross section through a long leg of a finished winding package;
Figure 6:
a plan view of an assembly aid for assembling the winding package with inserted insulation film;
Figure 7:
the construction of a planar transformer according to the invention in a plan.

Figur 1 zeigt eine Ansicht eines typischen Wicklungselementes, welches vorzugsweise aus einem Kupferblech besteht. Das Wicklungselement 1 ist im Wesentlichen als rechteckige oder ovale Leiterschleife ausgebildet und besitzt jeweils zwei, in etwa zueinander parallele lange Schenkel 2, 3 und zwei zueinander parallele kurze Schenkel 4, 5. Zur Kontaktierung mit weiteren Wicklungselementen weist jedes Wicklungselement 1 Anschlüsse 6, 7 auf. Beim Übereinanderstapeln mehrerer Wicklungselemente kommen diese Anschlüsse 6, 7 genau übereinander zu liegen und erlauben eine einfache Kontaktierung der Wicklungselemente 1 untereinander. Die Anschlüsse der anderen Wicklung werden gegenüber ausgeführt.Figure 1 shows a view of a typical winding element, which preferably consists of a copper sheet. The winding element 1 is in the Essentially designed and possessed as a rectangular or oval conductor loop each two, approximately parallel long legs 2, 3 and two mutually parallel short legs 4, 5. For contacting others Each winding element has 1 connections 6, 7 for winding elements. When several winding elements are stacked on top of each other, they come Connections 6, 7 lie exactly one above the other and allow a simple one Contacting the winding elements 1 with each other. The connections of the other winding are carried out opposite.

In Figur 2 ist dargestellt, dass insbesondere die Außen- und Innenkanten der langen Schenkel 2, 3 des Wicklungselementes 1 mit einer Klebefolie 8 umklebt bzw. umbördelt sind. Die untere Kante des kurzen Schenkels 5 ist ebenfalls mit der Klebefolie 8 umbördelt. Diese Umbördelung um den Betrag s stellt die vorgeschriebene Kriechstrecke zwischen zwei aufeinander liegenden Wicklungselementen 1 sicher, wobei die Kriechstrecke zwei mal dem Betrag s entspricht. Die Kriechstrecke zum Wicklungskern entspricht dem Betrag s.In Figure 2 it is shown that in particular the outer and inner edges of the long legs 2, 3 of the winding element 1 with an adhesive film 8 or flanged. The lower edge of the short leg 5 is also with the adhesive film 8 flanged. This flanging by the amount s represents the prescribed creepage distance between two superimposed ones Winding elements 1 safe, the creepage distance twice the amount s equivalent. The creepage distance to the winding core corresponds to the amount s.

Zwischen zwei aufeinander liegenden Wicklungselementen 1 wird erfindungsgemäß eine Isolationsfolie 9 eingebracht, wie sie in Figur 3 dargestellt ist. Die Isolationsfolie entspricht in ihrer Formgebung in etwa den Wicklungselementen 1. Die Bereiche 10 der Isolationsfolie 9 sind in etwa so breit ausgebildet wie die langen Schenkel 2, 3 der Wicklungselemente 1, wobei die Bereiche 11 jedoch breiter bzw. länger ausgebildet sind und, insbesondere im Bereich der kurzen Schenkel 4, 5, über die Außenkanten der Wicklungselemente 1 hinausstehen.Between two superimposed winding elements 1 According to the invention, an insulation film 9 is introduced, as shown in FIG. 3 is shown. The shape of the insulation foil corresponds approximately to that Winding elements 1. The areas 10 of the insulation film 9 are approximately like this broad as the long legs 2, 3 of the winding elements 1, wherein however, the areas 11 are wider and longer, and in particular in the area of the short legs 4, 5, over the outer edges of the Stand out winding elements 1.

Figur 4 zeigt ein mit Klebeband 8 umbördeltes Wicklungselement 1, welches auf eine Isolationsfolie 9 aufgelegt ist. Man erkennt deutlich, dass die Isolationsfolie 9 z. B. an den Kanten 12, 13 und 14 des Wicklungselementes 1 über diese Kanten um eine Strecke s hinaussteht. Dieser Überstand bildet wiederum die vorgeschriebene Kriechstrecke von 2 x s zwischen zwei aufeinander liegenden Wicklungselementen 1. Der Wicklungskern 15, der aus zwei, im Querschnitt etwa E-förmigen, Kernhälften besteht, wird zwischen das aus mehreren Wicklungselementen 1 bestehende Wicklungspaket eingeführt, so dass zwei Schenkel des Kerns links und rechts der langen Schenkel 2, 3 des Wicklungspaketes zu liegen kommen und der mittlere Schenkel des Kerns 15 im Innenraum des Wicklungspaketes liegt. Durch den Überstand der Isolationsfolie 9 an den Kanten 12 und 14 des Wicklungselementes 1 wird ein entsprechender Isolationsabstand von 1 x s zum Kern 15 und 2 x s zwischen den Wicklungselementen 1 sichergestellt.FIG. 4 shows a winding element 1 flanged with adhesive tape 8, which is placed on an insulation film 9. One can clearly see that the Insulation film 9 z. B. at the edges 12, 13 and 14 of the winding element 1 protrudes beyond these edges by a distance s. This supernatant forms again the prescribed creepage distance of 2 x s between two superimposed winding elements 1. The winding core 15, the two, in cross-section approximately E-shaped, core halves, is between the introduced winding package consisting of several winding elements 1, so that two legs of the core left and right of the long legs 2, 3 of the winding package and the middle leg of the core 15 lies in the interior of the winding package. By the supernatant of the Insulation film 9 on the edges 12 and 14 of the winding element 1 is a Corresponding insulation distance of 1 x s to the core 15 and 2 x s between the winding elements 1 ensured.

Figur 5 zeigt einen Querschnitt durch einen langen Schenkel 2 des fertigen Wicklungspaketes. Man erkennt die übereinander liegenden Wicklungselemente 1, zwischen denen jeweils eine Isolationsfolie 9 angeordnet ist. Die Wicklungselemente 1 sind an ihren Außenkanten mit einer Klebefolie 8 umbördelt. Die Isolationsfolien 9 weisen eine bestimmte Dicke d auf, um den vorgeschriebenen Isolationsabstand zwischen den jeweiligen Wicklungselementen 1 sicherzustellen. An den Außenkanten der Wicklungselemente 1 wirkt nur die umbördelte Klebefolie 8 als Isolation. Aus diesem Grunde werden die Außenschenkel des Wicklungspaketes zusätzlich mit mehreren Lagen einer Isolationsfolie 16 umwickelt.Figure 5 shows a cross section through a long leg 2 of the finished Winding package. You can see the one on top of the other Winding elements 1, between each of which an insulating film 9 is arranged is. The winding elements 1 are provided with an adhesive film 8 on their outer edges umbördelt. The insulation foils 9 have a certain thickness d to the prescribed insulation distance between the respective Ensure winding elements 1. On the outer edges of the Winding elements 1 only the flanged adhesive film 8 acts as insulation. Out for this reason, the outer legs of the winding package are additional wrapped with several layers of insulation film 16.

In Figur 6 ist schließlich eine Montagehilfe 17 zur Montage des Wicklungspaketes dargestellt. Die Montagehilfe besteht aus einer flachen Grundplatte und mehreren, von der Grundplatte senkrecht nach oben stehenden Montagedornen 18 bis 20. Die inneren Montagedorne 18 sind derart angeordnet, dass sie in den Innenraum der Wicklungselemente 1 bzw. der Isolationsfolien 9 eingreifen. Dadurch werden die übereinander liegenden Lagen von Wicklungselementen 1 und Isolationsfolien gegenseitig ausgerichtet. Die Montagedorne 19 sind so angeordnet, dass sie in die Lötbohrungen der Anschlüsse 6, 7 der Wicklungselemente 1 eingreifen und sorgen somit für eine weitere lagengenaue Ausrichtung der Wicklungselemente. Die Montagedorne 20 dienen zur Ausrichtung von Wicklungselementen 1 mit anders gestalteten Anschlüssen und Lötbohrungen.Finally, FIG. 6 shows an assembly aid 17 for assembling the Winding package shown. The assembly aid consists of a flat one Base plate and several, from the base plate vertically upwards standing assembly mandrels 18 to 20. The inner assembly mandrels 18 are of this type arranged that they in the interior of the winding elements 1 and the Intervene insulation foils 9. This will make the one on top of the other Layers of winding elements 1 and insulating foils aligned with each other. The mounting mandrels 19 are arranged so that they are in the solder holes Connections 6, 7 of the winding elements 1 engage and thus ensure a further precise alignment of the winding elements. The assembly mandrels 20 are used to align winding elements 1 with different designs Connections and solder holes.

Figur 7 zeigt schließlich eine Aufsicht auf einen erfindungsgemäßen Transformator, wobei die obere Hälfte des Wicklungskerns 15 der Übersicht halber nicht dargestellt ist. Das den Wicklungskern 15 umgebende Wicklungspaket 21 umfasst gegenüberliegend herausgeführte Anschlüsse 22, 23 für die jeweiligen Primär- und Sekundärwicklungen. Figure 7 finally shows a top view of an inventive Transformer, the upper half of the winding core 15 of the overview is not shown for the sake of it. That surrounding the winding core 15 Winding package 21 comprises connections 22 led out opposite one another, 23 for the respective primary and secondary windings.

Zeichnungslegendedrawing Legend

11
Wicklungselementwinding element
22
Schenkel, langThigh, long
33
Schenkel, langThigh, long
44
Schenkel, kurzThigh, short
55
Schenkel, kurzThigh, short
66
Anschlussconnection
77
Anschlussconnection
88th
Umbördelungbeading
99
Isolationsfolieinsulation blanket
1010
BereichArea
1111
BereichArea
1212
Kanteedge
1313
Kanteedge
1414
Kanteedge
1515
Wicklungskernwinding core
1616
Isolationsfolieinsulation blanket
1717
Montagehilfemounting aid
1818
Dornmandrel
1919
Dornmandrel
2020
Dornmandrel
2121
Wicklungspaketwinding package
2222
Anschlüsseconnections
2323
Anschlüsseconnections

Claims (9)

Induktives elektronisches Bauelement in Planarbauweise, insbesondere Planartransformator oder Planarspule, mit einem Wicklungspaket, bestehend aus einer oder mehreren planaren Wicklungen, die jeweils aus übereinander liegenden, flachen und leitfähigen, durch Isolationsfolien (9) voneinander getrennten, Wicklungselementen (1) gebildet sind, welche um einen Wicklungskern (15) angeordnet werden, dadurch gekennzeichnet, dass die Kanten der Wicklungselemente (1) mindestens teilweise oder vollständig mit einer isolierenden Klebefolie (8) umbördelt sind oder die Wicklungselemente (1) im Wesentlichen vollständig mit einer isolierenden Klebefolie (8) umgeben sind, und dass die Isolationsfolien (9) zusammen mit den Umbördelungen/Einwicklungen der Wicklungselemente (1) mit Klebefolie (8) derart aufeinander abgestimmt dimensioniert sind, dass die von den zuständigen Sicherheitsbehörden vorgeschriebenen Isolations-, Luft- und Kriechstrecken (d; s) eingehalten werden.Inductive electronic component in planar construction, in particular planar transformer or planar coil, with a winding package, consisting of one or more planar windings, each of which is formed by superimposed, flat and conductive winding elements (1) separated from one another by insulation foils (9) a winding core (15) can be arranged, characterized in that the edges of the winding elements (1) are at least partially or completely flanged with an insulating adhesive film (8) or the winding elements (1) are essentially completely surrounded with an insulating adhesive film (8) , and that the insulation foils (9) together with the flanges / wraps of the winding elements (1) with adhesive foil (8) are dimensioned in such a way that the insulation, air and creepage distances (d; s) prescribed by the responsible safety authorities are complied with become. Induktives elektronisches Bauelement nach Anspruch 1, dadurch gekennzeichnet, dass die Abmessungen der Isolationsfolien (9) in Teilbereichen (10) den Abmessungen der Wicklungselemente (1) entsprechen und in den übrigen Teilbereichen (11) über die Abmessungen der Wicklungselemente hinausgehen.Inductive electronic component according to Claim 1, characterized in that the dimensions of the insulating foils (9) in partial areas (10) correspond to the dimensions of the winding elements (1) and in the remaining partial areas (11) go beyond the dimensions of the winding elements. Induktives elektronisches Bauelement nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die den erstgenannten Teilbereichen (10) zugeordneten Kanten der Wicklungselemente (1) mit einer isolierenden Klebefolie (8) umbördelt sind.Inductive electronic component according to one of claims 1 or 2, characterized in that the edges of the winding elements (1) assigned to the first-mentioned partial areas (10) are flanged with an insulating adhesive film (8). Induktives elektronisches Bauelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jede Isolationsfolie (9) aus mehreren einzelnen Folienlagen besteht. Inductive electronic component according to one of Claims 1 to 3, characterized in that each insulation film (9) consists of several individual film layers. Induktives elektronisches Bauelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Wicklungselemente (1) als im Wesentlichen rechteckige oder ovale, offene Leiterschleifen ausgebildet sind, mit jeweils zwei langen Schenkeln (2, 3) und zwei kurzen Schenkeln (4, 5).Inductive electronic component according to one of Claims 1 to 4, characterized in that the winding elements (1) are designed as essentially rectangular or oval, open conductor loops, each with two long legs (2, 3) and two short legs (4, 5 ). Induktives elektronisches Bauelement nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Isolationsfolien (9) überwiegend im Bereich der kurzen Schenkel (4, 5) über die Außenabmessungen der Wicklungselemente (1) hinausstehen.Inductive electronic component according to one of Claims 1 to 5, characterized in that the insulation foils (9) predominantly protrude in the region of the short legs (4, 5) beyond the outer dimensions of the winding elements (1). Induktives elektronisches Bauelement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Wicklungspaket im Bereich der langen Schenkel (2, 3) der Wicklungselemente (1) mit mehreren Lagen einer Isolationsfolie (16) umwickelt ist.Inductive electronic component according to one of claims 1 to 6, characterized in that the winding package is wrapped in the region of the long legs (2, 3) of the winding elements (1) with a plurality of layers of an insulation film (16). Induktives elektronisches Bauelement nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Wicklungselemente (1) aus Leitungsblechen bestehen.Inductive electronic component according to one of claims 1 to 7, characterized in that the winding elements (1) consist of conductor plates. Induktives elektronisches Bauelement nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Wicklungselemente (1) aus einem Isolator mit einer aufgebrachten leitfähigen Schicht bestehen.Inductive electronic component according to one of claims 1 to 8, characterized in that the winding elements (1) consist of an insulator with an applied conductive layer.
EP02020299A 2001-09-14 2002-09-11 Inductive electronic flat-type component, in particular planar transformer or planar inductor Expired - Lifetime EP1293995B1 (en)

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DE10145278A DE10145278A1 (en) 2001-09-14 2001-09-14 Flat design inductive electronic component, in particular planar transformer or planar coil
DE10145278 2001-09-14

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AT (1) ATE330322T1 (en)
CY (1) CY1105203T1 (en)
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WO2010035132A1 (en) * 2008-09-26 2010-04-01 Lincoln Global, Inc. Planar transformer and method of manufacturing
EP2400511A1 (en) * 2010-06-28 2011-12-28 ABB Technology AG Modular non-circular coil for transformers
US9620278B2 (en) 2014-02-19 2017-04-11 General Electric Company System and method for reducing partial discharge in high voltage planar transformers

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EP0608127A1 (en) * 1993-01-22 1994-07-27 AT&T Corp. Insulation system for magnetic windings having stacked planar conductors
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Publication number Priority date Publication date Assignee Title
WO2010035132A1 (en) * 2008-09-26 2010-04-01 Lincoln Global, Inc. Planar transformer and method of manufacturing
US8054154B2 (en) 2008-09-26 2011-11-08 Linclon Global, Inc. Planar transformer and method of manufacturing
EP2400511A1 (en) * 2010-06-28 2011-12-28 ABB Technology AG Modular non-circular coil for transformers
US9620278B2 (en) 2014-02-19 2017-04-11 General Electric Company System and method for reducing partial discharge in high voltage planar transformers
US10236113B2 (en) 2014-02-19 2019-03-19 General Electric Company System and method for reducing partial discharge in high voltage planar transformers

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DK1293995T3 (en) 2006-10-16
DE10145278A1 (en) 2003-04-10
CY1105203T1 (en) 2010-03-03
EP1293995A3 (en) 2003-04-16
ES2266372T3 (en) 2007-03-01
EP1293995B1 (en) 2006-06-14
ATE330322T1 (en) 2006-07-15
DE50207174D1 (en) 2006-07-27
PT1293995E (en) 2006-11-30

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