EP1075002B1 - Variable inductance coil device - Google Patents

Variable inductance coil device Download PDF

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Publication number
EP1075002B1
EP1075002B1 EP00116632A EP00116632A EP1075002B1 EP 1075002 B1 EP1075002 B1 EP 1075002B1 EP 00116632 A EP00116632 A EP 00116632A EP 00116632 A EP00116632 A EP 00116632A EP 1075002 B1 EP1075002 B1 EP 1075002B1
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EP
European Patent Office
Prior art keywords
cores
coil
recesses
size
contours
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
EP00116632A
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German (de)
French (fr)
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EP1075002A3 (en
EP1075002A2 (en
Inventor
Bernhard Apsner
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Tridonicatco GmbH and Co KG
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Tridonicatco GmbH and Co KG
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Publication of EP1075002A2 publication Critical patent/EP1075002A2/en
Publication of EP1075002A3 publication Critical patent/EP1075002A3/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps
    • 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
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
    • 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
    • H01F27/326—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures specifically adapted for discharge lamp ballasts

Definitions

  • the present invention relates to a coil or a transformer according to the preamble of the independent claims.
  • Such coils are used for example in the output circuits of electronic ballasts for gas discharge lamps. They usually consist of a tubular coil body to which the winding is applied. The intended for the application of the winding region of the bobbin is bounded by two winding chamber boundary walls, which usually also form the two end faces of the bobbin at the same time.
  • the coils or transformers additionally cores of a magnetizable material, such as ferrite, on. These are preferably "E" -shaped cores whose center legs dip when placed from the two ends of the bobbin forth in the pipe opening. The use of such E-cores is over known other cores - e.g.
  • Ring cores to give preference, since the E-cores can be placed in contrast to the toroidal cores on one-piece bobbins or on already wound coils or transformers.
  • the two outer legs of the E cores usually surround the bobbin and rest with their inner sides against the winding chamber boundary walls.
  • E-cores whose center legs are of different heights and / or widths usually have different distances between their respective outer legs, so that no E-cores of different sizes can be placed on the currently known bobbins.
  • the publication GB 2 216 729 shows a bobbin with the features of the preamble of claim 1.
  • This bobbin according to the invention is characterized in that its two winding chamber boundary walls recesses for receiving the Outer leg of E cores have a second size, the outer leg distance is less than the distance in the originally provided for this bobbin E cores of a first size. This ensures that the E-cores of the second size do not sit loosely in the coil opening, but rest firmly on the edges of the recesses. In this way it is possible with very simple means to produce coils of different inductance while still using the same bobbin. Only E cores of different sizes are used.
  • additional rib-like contours for dividing the predetermined by the winding chamber boundary walls area may be provided, for example, to thereby possibly separate the two windings of a transformer from each other on the outside of the bobbin.
  • these rib-like contours likewise have recesses for receiving the outer limbs of the smaller E cores.
  • the in Fig. 1 illustrated tubular coil body 1 has a substantially rectangular cross-section.
  • the region in which the winding or the windings are applied to the bobbin 1 is limited by the two winding chamber boundary walls 3, which also form the two end faces of the bobbin 1 at the same time.
  • this winding chamber is divided by located on the outside of the bobbin 1 rib-like contours 5, whereby, for example, the primary winding and the secondary winding of a transformer can be separated from each other.
  • Both the two winding chamber boundary walls 3 and the rib-like contours 5 have elongated rectangular recesses 4 and 6.
  • Such a bobbin 1 can be produced for example by means of injection molding, wherein it is preferably formed in one piece. Not shown in the drawing pins, with which the coil ends are connected.
  • Fig. 1 As in Fig. 1 is shown are placed on the bobbin 1 from the two ends thereof, for example made of ferrite E-cores 10a and 10b of a first size, wherein the center leg 11 immerse when placed in the pipe opening 2 of the bobbin 1.
  • the cross section of the center legs 11 corresponds to the dimensions of the tube opening 2 of the bobbin 1 and the distance between the inner sides of the two outer legs 12a and 12b, respectively, of the width of the winding chamber boundary walls 3 and the rib-like contours 5.
  • These E cores 10a and 10b also have a slightly greater height than the recesses 4 and 6.
  • the already partially patched E-core 10b therefore surrounds the entire bobbin 1, the outer legs 12b engage over the recesses 4 and 6 and at least below these recesses 4 and 6 plan and defined on the winding chamber boundary walls 3 and the rib-like contours 5 rest so that gaps are created in these areas, but do not affect the functionality of the coil or the transformer. Since the outer legs 12a and 12b of the E-cores 10a and 10b rest with their inner sides at least partially on the winding chamber boundary walls 3 and the rib-like contours 5 and further dip the middle leg 11 form-fitting manner in the tube opening 2, the E-cores are 10a and 10b the first size in a fixed predetermined position on the bobbin 1 at.
  • the outer legs 12a and 12b are so long that the two fully mounted E-cores 10a and 10b contact each other for one and abut the other on the two end faces of the bobbin 1. It is thus formed a completely closed ring around the bobbin 1 around.
  • the end faces of the outer legs 10a and 10b can be connected to one another, for example by means of soldering or gluing.
  • E-cores 20a and 20b of the second size have a slightly lower height than the two in Fig. 1 shown E cores 10a and 10b of the first size.
  • the center leg 21 are a little narrower, so that they have a total of a smaller cross-sectional area and thus the inductance of the coil is reduced.
  • the distance between the inner sides of the outer legs 22a and 20b is slightly less than in the larger E-cores 10a, 10b.
  • the smaller E cores 20a and 20b Due to the provided on the winding chamber boundary walls 3 and the rib-like contours 5 recesses 4 and 6, the smaller E cores 20a and 20b but still be placed on the bobbin 1, since the outer legs 22a and 22b now in these recesses 4 and 6th engage, as can be seen in the already partially attached E-core 20b.
  • the length corresponds to the Recesses 4 and 6, the height of the outer legs 22a, 22b of the smaller E cores 20a and 20b, so that they fill the recesses 4 and 6 completely (contour key). In this way it is achieved that the smaller E cores 20a and 20b not loose, but in a fixed position against the bobbin 1.
  • the outer legs 22a, 22b of the E-cores 20a, 20b of the second size preferably also have a length such that their end faces touch in the completely attached state. Also, the two small E-cores 20a, 20b can thus be connected to each other.
  • each commercially available E-cores are shown.
  • the recesses according to the invention may also be shaped so that E cores whose outer limbs contain protrusions, can be placed on the bobbin and thereby fill the recesses form-fitting. With conventional E cores, however, the illustrated rectangular recesses are sufficient.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Insulating Of Coils (AREA)

Abstract

The coil or transformer consists of a reed-like coil body (1) carrying a winding, and having winding chamber walls (3) at its end, and respectively two E-shaped cores (10a, 10b) of a first size put on the coil body. The middle legs (11) of the cores immerse in the reed aperture (2), and both outer legs (12a, 12b) lie with their insides, at least partially on the winding chamber walls. The walls comprise extrusions (4) for supporting the outside legs of E-shaped cores of a second size, whose leg distance is smaller than that of the cores of the first size.

Description

Die vorliegende Erfindung betrifft eine Spule oder einen Transformator nach dem Oberbegriff der unabhängigen Ansprüche.The present invention relates to a coil or a transformer according to the preamble of the independent claims.

Derartige Spulen finden beispielsweise in den Ausgangskreisen von elektronischen Vorschaltgeräten für Gasentladungslampen Verwendung. Sie bestehen üblicherweise aus einem rohrartigen Spulenkörper, auf den die Wicklung aufgebracht ist. Der für das Aufbringen der Wicklung vorgesehene Bereich des Spulenkörpers wird von zwei Wicklungskammer-Begrenzungswänden begrenzt, die in der Regel zugleich auch die beiden Stirnseiten des Spulenkörpers bilden. Zum Erhöhen der Induktivität weisen die Spulen oder Transformatoren zusätzlich Kerne aus einem magnetisierbarem Material, beispielsweise aus Ferrit, auf. Dabei handelt es sich vorzugsweise um "E"-förmige Kerne, deren Mittelschenkel beim Aufsetzen von den beiden Enden des Spulenkörpers her in dessen Rohröffnung eintauchen. Der Verwendung von derartigen E-Kernen ist gegenüber bekannten anderen Kernen - z.B. Ringkernen - der Vorzug zu geben, da die E-Kerne im Gegensatz zu den Ringkernen auf einstückige Spulenkörper bzw. auf bereits fertig bewickelte Spulen oder Transformatoren aufgesetzt werden können. Die beiden Außenschenkel der E-Kerne umgreifen dabei in der Regel den Spulenkörper und liegen mit ihren Innenseiten an den Wicklungskammer-Begrenzungswänden an.Such coils are used for example in the output circuits of electronic ballasts for gas discharge lamps. They usually consist of a tubular coil body to which the winding is applied. The intended for the application of the winding region of the bobbin is bounded by two winding chamber boundary walls, which usually also form the two end faces of the bobbin at the same time. To increase the inductance, the coils or transformers additionally cores of a magnetizable material, such as ferrite, on. These are preferably "E" -shaped cores whose center legs dip when placed from the two ends of the bobbin forth in the pipe opening. The use of such E-cores is over known other cores - e.g. Ring cores - to give preference, since the E-cores can be placed in contrast to the toroidal cores on one-piece bobbins or on already wound coils or transformers. The two outer legs of the E cores usually surround the bobbin and rest with their inner sides against the winding chamber boundary walls.

Prinzipiell ist es möglich, die Induktivität der Spule durch die Verwendung von E-Kernen unterschiedlicher Größe zu beeinflussen. Allerdings weisen E-Kerne, deren Mittelschenkel unterschiedlich hoch und/oder breit sind, normalerweise auch unterschiedliche Abstände zwischen ihren jeweiligen Außenschenkeln auf, so daß auf die derzeit bekannten Spulenkörper keine E-Kerne verschiedener Größe aufgesetzt werden können.In principle, it is possible to influence the inductance of the coil by the use of E cores of different sizes. However, E-cores whose center legs are of different heights and / or widths usually have different distances between their respective outer legs, so that no E-cores of different sizes can be placed on the currently known bobbins.

Die Druckschrift GB 2 216 729 zeigt einen Spulenkörper mit den Merkmalen des Oberbegriffs des Anspruchs 1.The publication GB 2 216 729 shows a bobbin with the features of the preamble of claim 1.

Es ist daher Aufgabe der Erfindung, eine Spule oder einen Transformator mit einem rohrartigen Spulenkörper anzugeben, wobei der Spulenkörper derart ausgebildet ist, daß E-Kerne von zumindest zwei verschiedenen Größen auf diesen aufgesetzt werden können.It is therefore an object of the invention to provide a coil or a transformer with a tubular coil bobbin, wherein the bobbin is formed such that E cores of at least two different sizes can be placed on this.

Die Aufgabe wird durch eine Spule oder einen Transformator mit einem Spulenkörper, der die Merkmale des Anspruchs 1 aufweist, gelöst. Dieser erfindungsgemäße Spulenkörper zeichnet sich dadurch aus, daß seine beiden Wicklungskammer-Begrenzungswände Ausnehmungen zur Aufnahme der Außenschenkel von E-Kernen einer zweiten Größe aufweisen, deren Außenschenkel-Abstand geringer ist als der Abstand bei den ursprünglich für diesen Spulenkörper vorgesehenen E-Kernen einer ersten Größe. Dadurch wird erreicht, daß die E-Kerne der zweiten Größe nicht locker in der Spulenöffnung sitzen, sondern fest an den Kanten der Ausnehmungen aufliegen. Auf diese Weise ist es mit sehr einfachen Mitteln möglich, Spulen unterschiedlicher Induktivität herzustellen und dabei dennoch den gleichen Spulenkörper zu verwenden. Es finden lediglich E-Kerne verschiedener Größen Verwendung.The object is achieved by a coil or a transformer having a coil body, which has the features of claim 1. This bobbin according to the invention is characterized in that its two winding chamber boundary walls recesses for receiving the Outer leg of E cores have a second size, the outer leg distance is less than the distance in the originally provided for this bobbin E cores of a first size. This ensures that the E-cores of the second size do not sit loosely in the coil opening, but rest firmly on the edges of the recesses. In this way it is possible with very simple means to produce coils of different inductance while still using the same bobbin. Only E cores of different sizes are used.

Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche. Gemäß Anspruch 2 können beispielsweise an der Außenseite des Spulenkörpers zusätzlich rippenartige Konturen zur Unterteilung des durch die Wicklungskammer-Begrenzungswände vorgegebenen Bereichs vorgesehen sein, um dadurch evtl. die beiden Wicklungen eines Transformators voneinander zu trennen. Dabei weisen diese rippenartigen Konturen entsprechend dem Erfindungsgedanken ebenfalls Ausnehmungen zur Aufnahme der Außenschenkel der kleineren E-Kerne auf.Further developments of the invention are the subject of the dependent claims. According to claim 2, additional rib-like contours for dividing the predetermined by the winding chamber boundary walls area may be provided, for example, to thereby possibly separate the two windings of a transformer from each other on the outside of the bobbin. In accordance with the concept of the invention, these rib-like contours likewise have recesses for receiving the outer limbs of the smaller E cores.

Im folgenden soll die Erfindung anhand der beiliegenden Zeichnung näher erläutert werden. Es zeigen:

  • Fig. 1 einen erfindungsgemäßen Spulenkörper mit E-Kernen einer ersten Größe in perspektivischer Darstellung; und
  • Fig. 2 den erfindungsgemäßen Spulenkörper mit E-Kernen einer zweiten und kleineren Größe in perspektivischer Darstellung.
In the following the invention will be explained in more detail with reference to the accompanying drawings. Show it:
  • Fig. 1 a bobbin according to the invention with E-cores of a first size in a perspective view; and
  • Fig. 2 the bobbin according to the invention with E cores of a second and smaller size in a perspective view.

Der in Fig. 1 dargestellte rohrartige Spulenkörper 1 besitzt einen im wesentlichen rechteckigen Querschnitt. Der Bereich, in dem die Wicklung bzw. die Wicklungen auf den Spulenkörper 1 aufgebracht werden, wird durch die beiden Wicklungskammer-Begrenzungswände 3 begrenzt, die zugleich auch die beiden Stirnseiten des Spulenkörpers 1 bilden. Zusätzlich wird diese Wicklungskammer durch an der Außenseite des Spulenkörpers 1 befindliche rippenartige Konturen 5 unterteilt, wodurch beispielsweise die Primärwicklung und die Sekundärwicklung eines Transformators voneinander getrennt werden können. Sowohl die beiden Wicklungskammer-Begrenzungswände 3 als auch die rippenartigen Konturen 5 weisen längliche rechteckige Ausnehmungen 4 und 6 auf. Ein derartiger Spulenkörper 1 kann beispielsweise mittels Spritzgießen hergestellt werden, wobei er vorzugsweise einstückig ausgebildet ist. Nicht dargestellt sind in der Zeichnung Anschlußstifte, mit denen die Wicklungsenden verbunden werden.The in Fig. 1 illustrated tubular coil body 1 has a substantially rectangular cross-section. The region in which the winding or the windings are applied to the bobbin 1 is limited by the two winding chamber boundary walls 3, which also form the two end faces of the bobbin 1 at the same time. In addition, this winding chamber is divided by located on the outside of the bobbin 1 rib-like contours 5, whereby, for example, the primary winding and the secondary winding of a transformer can be separated from each other. Both the two winding chamber boundary walls 3 and the rib-like contours 5 have elongated rectangular recesses 4 and 6. Such a bobbin 1 can be produced for example by means of injection molding, wherein it is preferably formed in one piece. Not shown in the drawing pins, with which the coil ends are connected.

Wie in Fig. 1 dargestellt ist, werden auf den Spulenkörper 1 von dessen beiden Enden her zwei z.B. aus Ferrit bestehende E-Kerne 10a und 10b einer ersten Größe aufgesetzt, wobei deren Mittelschenkel 11 beim Aufsetzen in die Rohröffnung 2 des Spulenkörpers 1 eintauchen. Üblicherweise entspricht bei den E-Kernen 10a, 10b der ersten Größe der Querschnitt der Mittelschenkel 11 den Abmessungen der Rohröffnung 2 des Spulenkörpers 1 und der Abstand zwischen den Innenseiten der beiden Außenschenkel 12a bzw. 12b der Breite der Wicklungskammer-Begrenzungswände 3 und der rippenartigen Konturen 5. Diese E-Kerne 10a und 10b weisen ferner eine etwas größere Höhe als die Ausnehmungen 4 und 6 auf. Der bereits teilweise aufgesetzte E-Kern 10b umgreift daher den gesamten Spulenkörper 1, wobei die Außenschenkel 12b die Ausnehmungen 4 und 6 übergreifen und zumindest unterhalb dieser Ausnehmungen 4 und 6 plan und definiert an den Wicklungskammer-Begrenzungswänden 3 bzw. den rippenartigen Konturen 5 aufliegen, so daß in diesen Bereichen Lücken entstehen, die allerdings die Funktionalität der Spule oder des Transformators nicht beeinflussen. Da die Außenschenkel 12a und 12b der E-Kerne 10a und 10b mit ihren Innenseiten zumindest teilweise an den Wicklungskammer-Begrenzungswänden 3 sowie den rippenartigen Konturen 5 aufliegen und ferner die Mittelschenkel 11 formschlüssig in die Rohröffnung 2 eintauchen, liegen die E-Kerne 10a und 10b der ersten Größe in einer fest vorgegebenen Position an dem Spulenkörper 1 an. In der Regel sind die Außenschenkel 12a und 12b dabei so lang, daß die beiden vollständig aufgesetzten E-Kerne 10a und 10b sich zum einen gegenseitig berühren und zum anderen an den beiden Stirnseiten des Spulenkörpers 1 anliegen. Es wird somit ein vollständig geschlossener Ring um den Spulenkörper 1 herum gebildet. Um ein Herausfallen der beiden E-Kerne 10a und 10b aus dem Spulenkörper 1 zu verhindern, können die Stirnflächen der Außenschenkel 10a und 10b z.B. mittels Löten oder Verkleben miteinander verbunden werden.As in Fig. 1 is shown are placed on the bobbin 1 from the two ends thereof, for example made of ferrite E-cores 10a and 10b of a first size, wherein the center leg 11 immerse when placed in the pipe opening 2 of the bobbin 1. Usually, in the E-cores 10a, 10b of the first size, the cross section of the center legs 11 corresponds to the dimensions of the tube opening 2 of the bobbin 1 and the distance between the inner sides of the two outer legs 12a and 12b, respectively, of the width of the winding chamber boundary walls 3 and the rib-like contours 5. These E cores 10a and 10b also have a slightly greater height than the recesses 4 and 6. The already partially patched E-core 10b therefore surrounds the entire bobbin 1, the outer legs 12b engage over the recesses 4 and 6 and at least below these recesses 4 and 6 plan and defined on the winding chamber boundary walls 3 and the rib-like contours 5 rest so that gaps are created in these areas, but do not affect the functionality of the coil or the transformer. Since the outer legs 12a and 12b of the E-cores 10a and 10b rest with their inner sides at least partially on the winding chamber boundary walls 3 and the rib-like contours 5 and further dip the middle leg 11 form-fitting manner in the tube opening 2, the E-cores are 10a and 10b the first size in a fixed predetermined position on the bobbin 1 at. In general, the outer legs 12a and 12b are so long that the two fully mounted E-cores 10a and 10b contact each other for one and abut the other on the two end faces of the bobbin 1. It is thus formed a completely closed ring around the bobbin 1 around. In order to prevent the two E cores 10a and 10b from falling out of the bobbin 1, the end faces of the outer legs 10a and 10b can be connected to one another, for example by means of soldering or gluing.

Die in Fig. 2 dargestellten E-Kerne 20a und 20b der zweiten Größe weisen eine etwas geringere Höhe als die beiden in Fig. 1 gezeigten E-Kerne 10a und 10b der ersten Größe auf. Ferner sind nun die Mittelschenkel 21 ein wenig schmäler, so daß diese insgesamt eine geringere Querschnittsfläche aufweisen und damit die Induktivität der Spule reduziert wird. Außerdem ist auch der Abstand zwischen den Innenseiten der Außenschenkel 22a bzw. 20b etwas geringer als bei den größeren E-Kernen 10a, 10b. Aufgrund der an den Wicklungskammer-Begrenzungswänden 3 und den rippenartigen Konturen 5 vorgesehenen Ausnehmungen 4 und 6 können die kleineren E-Kerne 20a und 20b aber dennoch auf den Spulenkörper 1 aufgesetzt werden, da die Außenschenkel 22a bzw. 22b nun in diese Ausnehmungen 4 und 6 eingreifen, wie dies bei dem bereits teilweise aufgesetzten E-Kern 20b zu erkennen ist. Zusätzlich entspricht die Länge der Ausnehmungen 4 und 6 der Höhe der Außenschenkel 22a, 22b der kleineren E-Kerne 20a und 20b, so daß diese die Ausnehmungen 4 und 6 vollständig (konturschlüssig) ausfüllen. Auf diese Weise wird erreicht, daß auch die kleineren E-Kerne 20a und 20b nicht locker, sondern in einer festen Position an dem Spulenkörper 1 anliegen. Auch die Außenschenkel 22a, 22b der E-Kerne 20a, 20b der zweiten Größe weisen vorzugsweise eine derartige Länge auf, daß sich deren Stirnflächen im vollständig aufgesetzten Zustand berühren. Auch die beiden kleinen E-Kerne 20a, 20b können somit miteinander verbunden werden.In the Fig. 2 shown E-cores 20a and 20b of the second size have a slightly lower height than the two in Fig. 1 shown E cores 10a and 10b of the first size. Further, now the center leg 21 are a little narrower, so that they have a total of a smaller cross-sectional area and thus the inductance of the coil is reduced. In addition, the distance between the inner sides of the outer legs 22a and 20b is slightly less than in the larger E-cores 10a, 10b. Due to the provided on the winding chamber boundary walls 3 and the rib-like contours 5 recesses 4 and 6, the smaller E cores 20a and 20b but still be placed on the bobbin 1, since the outer legs 22a and 22b now in these recesses 4 and 6th engage, as can be seen in the already partially attached E-core 20b. In addition, the length corresponds to the Recesses 4 and 6, the height of the outer legs 22a, 22b of the smaller E cores 20a and 20b, so that they fill the recesses 4 and 6 completely (contour key). In this way it is achieved that the smaller E cores 20a and 20b not loose, but in a fixed position against the bobbin 1. The outer legs 22a, 22b of the E-cores 20a, 20b of the second size preferably also have a length such that their end faces touch in the completely attached state. Also, the two small E-cores 20a, 20b can thus be connected to each other.

In den beiden Figuren 1 und 2 sind jeweils handelsübliche E-Kerne dargestellt. Selbstverständlich können die erfindungsgemäßen Ausnehmungen auch derart geformt sein, daß E-Kerne, deren Außenschenkel Vorwölbungen enthalten, auf den Spulenkörper aufgesetzt werden können und dabei die Ausnehmungen formschlüssig füllen. Bei üblichen E-Kernen sind allerdings die dargestellten rechteckigen Ausnehmungen ausreichend.In both Figures 1 and 2 each commercially available E-cores are shown. Of course, the recesses according to the invention may also be shaped so that E cores whose outer limbs contain protrusions, can be placed on the bobbin and thereby fill the recesses form-fitting. With conventional E cores, however, the illustrated rectangular recesses are sufficient.

Auf die eben beschriebene Weise können somit mit einem einzigen Spulenkörper Spulen oder Transformatoren unterschiedlicher Induktivität hergestellt werden, wobei lediglich die E-Kerne verschiedener Größe Verwendung finden. Es können daher mit dem erfindungsgemäßen Spulenkörper die Produktionskosten für die Herstellen eines zweiten Spulenkörpers einer zweiten Größe eingespart werden. Ferner besteht natürlich auch die Möglichkeit, durch Veränderung der Windungszahlen der verschiedenen Wicklungen die Induktivität weiter zu beeinflussen. Da in der Regel mit größeren E-Kernen auch eine größere Induktivität angestrebt wird, werden gleichzeitig größere Windungszahlen verwendet werden, als bei kleineren E-Kernen. Die Verwendung von kleineren E-Kernen und Windungszahlen wäre natürlich auch bei der Herstellung von Transformatoren möglich, obgleich dies in diesem Fall weniger sinnvoll ist, da bei Transformatoren immer eine möglichst gute Übertragung anzustreben ist, also eine möglichst hohe Induktivität erzielt werden sollte.In the manner just described so coils or transformers of different inductance can be produced with a single bobbin, with only the E-cores of different sizes are used. It can therefore be saved with the bobbin according to the invention, the production costs for the production of a second bobbin of a second size. Furthermore, of course, it is also possible to further influence the inductance by changing the number of turns of the various windings. Since greater inductance is generally also desired with larger E cores, larger numbers of turns will be used at the same time than with smaller E cores. The use of smaller E cores and numbers of turns would of course also in the manufacture of transformers possible, although this is less useful in this case, since in transformers always the best possible transfer is desirable, so the highest possible inductance should be achieved.

Claims (8)

  1. Coil or transformer, consisting of a pipe-like coil body (1), carrying the winding, with winding chamber bounding walls (3) at the ends thereof and in each case two E-cores (10a, 10b), of a first size, on the coil body (1), emplaceable from the two ends thereof, the middle limbs (11) of which dip into the pipe opening (2), wherein the two outer limbs (12a, 12b) lie with their inner sides at least partly on the winding chamber bounding walls (3),
    characterised in that,
    the winding chamber bounding walls (3) have recesses (4) for receiving the outer limbs (22a, 22b) of E-cores (20a, 20b) of a second size, the outer limb spacing of which is lesser than that of the E-cores (10a, 10b) of the first size.
  2. Coil or transformer according to claim 1,
    characterised in that,
    the outer side of the pipe-like coil body (1) has rib-like contours (5) for the subdivision of the winding chamber, wherein these rib-like contours (5) also have recesses (6) for receiving the outer limbs (22a, 22b) of the E-cores (20a, 20b) of the second size.
  3. Coil or transformer according to claim 1 or 2,
    characterised in that,
    the length of the recesses (4, 6) corresponds to the height of the outer limbs (22a, 22b) of the E-cores (20a, 20b) of the second size.
  4. Coil or transformer according to any of claims 1 to 3,
    characterised in that,
    the middle limbs of the E-cores of the first and the second size have different cross-sectional area.
  5. Coil or transformer according to claim 1,
    characterised in that,
    the outer side of the pipe-like coil body (1) has rib-like contours (5) for the subdivision of the winding chamber, wherein these rib-like contours (5) also have recesses (6) and the outer limbs (12a, 12b) of the E-cores (10a, 10b) lie in defined manner on the rib like contours (5) above and/or below the recesses (6).
  6. Coil or transformer according to any of claims 1 to 5,
    characterised in that,
    the winding chamber bounding walls (3) have recesses (4) and the outer limbs (22a, 22b) of the E-cores (20a, 20b) engage into these recesses (4) in contour-fitting manner.
  7. Coil or transformer according to claim 6,
    characterised in that,
    the outer side of the pipe-like coil body (1) has rib-like contours (5) for the subdivision of the winding chamber, wherein these rib like contours (5) also have recesses (6) for receiving the outer limbs (22a, 22b) of the E-cores (20a, 20b).
  8. Coil or transformer according to claim 6 or 7,
    characterised in that,
    the length of the recesses (4, 6) corresponds to the height of the outer limbs (22a, 22b) of the E-cores (20a, 20b).
EP00116632A 1999-08-02 2000-08-01 Variable inductance coil device Expired - Lifetime EP1075002B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29913485U DE29913485U1 (en) 1999-08-02 1999-08-02 Variable inductance coil
DE29913485U 1999-08-02

Publications (3)

Publication Number Publication Date
EP1075002A2 EP1075002A2 (en) 2001-02-07
EP1075002A3 EP1075002A3 (en) 2002-03-20
EP1075002B1 true EP1075002B1 (en) 2008-04-23

Family

ID=8076977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00116632A Expired - Lifetime EP1075002B1 (en) 1999-08-02 2000-08-01 Variable inductance coil device

Country Status (3)

Country Link
EP (1) EP1075002B1 (en)
AT (1) ATE393457T1 (en)
DE (2) DE29913485U1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1936125A1 (en) * 1969-07-16 1971-01-28 May & Christe Gmbh Winding structure for small transformers and choke coils
DE3612209A1 (en) * 1986-04-11 1987-10-22 Thomson Brandt Gmbh Transformer having a core which consists of two outer limbs and one centre limb
US4857878A (en) * 1988-01-19 1989-08-15 Eng Jr Benjamin Modular high frequency power transformer
JPH01227410A (en) * 1988-03-08 1989-09-11 Kijima:Kk Small-sized transformer
US5010314A (en) * 1990-03-30 1991-04-23 Multisource Technology Corp. Low-profile planar transformer for use in off-line switching power supplies
DE9213190U1 (en) * 1992-09-28 1992-11-26 Siemens AG, 8000 München Transformer or choke
DE9301086U1 (en) * 1993-01-27 1993-03-25 Alcatel SEL Aktiengesellschaft, 7000 Stuttgart Coil body
DE69429551T2 (en) * 1993-03-12 2002-06-20 Matsushita Electric Industrial Co., Ltd. Line filter
DE19641387C2 (en) * 1996-09-27 2000-09-07 Siemens Ag Winding body for a transformer or a choke
DE19641388C2 (en) * 1996-09-27 2001-01-18 Siemens Ag Winding body for a transformer or a choke

Also Published As

Publication number Publication date
DE29913485U1 (en) 2000-12-07
DE50015116D1 (en) 2008-06-05
EP1075002A3 (en) 2002-03-20
EP1075002A2 (en) 2001-02-07
ATE393457T1 (en) 2008-05-15

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