WO1991015021A1 - Inductive circuit element for assembly of printed circuit broads - Google Patents

Inductive circuit element for assembly of printed circuit broads Download PDF

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Publication number
WO1991015021A1
WO1991015021A1 PCT/EP1991/000453 EP9100453W WO9115021A1 WO 1991015021 A1 WO1991015021 A1 WO 1991015021A1 EP 9100453 W EP9100453 W EP 9100453W WO 9115021 A1 WO9115021 A1 WO 9115021A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaped
winding
wire elements
legs
winding support
Prior art date
Application number
PCT/EP1991/000453
Other languages
German (de)
French (fr)
Inventor
Edwin Hofbauer
Wolfgang Spitaler
Franz Ramlohr
Original Assignee
SIEMENS AKTIENGESELLSCHAFT öSTERREICH
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIEMENS AKTIENGESELLSCHAFT öSTERREICH, Siemens Aktiengesellschaft filed Critical SIEMENS AKTIENGESELLSCHAFT öSTERREICH
Priority to AT91906312T priority Critical patent/ATE125060T1/en
Priority to DE59105970T priority patent/DE59105970D1/en
Priority to EP91906312A priority patent/EP0479966B1/en
Publication of WO1991015021A1 publication Critical patent/WO1991015021A1/en

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Classifications

    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • the invention relates to an inductive circuit element for printed circuit board assembly with an at least one, but preferably a plurality of legs connected by yokes, having a composite core, the longitudinal axes of the legs being arranged parallel and equidistant to the printed circuit board and in the at least one leg has a coil former with a first winding applied in a conventional manner and a second winding is provided which consists of bow-shaped, U-shaped wire elements which arch over the leg or legs of the core and which together with conductor tracks into the their ends are soldered in, forming complete turns.
  • This technique has the advantage that the winding can be easily manufactured in the desired configuration by using preformed wire elements and a conventional winding process is not required.
  • the wire elements must be inserted individually, they are only mechanically secured to a small extent until they are soldered, so they can come inappropriately close and must therefore consist of insulated wire. This causes additional work by stripping the ends and reduces the thermal load capacity.
  • the wire elements rest and are supported on a tunnel-shaped winding support with a substantially U-shaped cross section.
  • the advantage achieved thereby is that the wire elements can be inserted into the winding support by an automatable process and the pre-assembled assembly can be inserted into the circuit board in one. Since the wire elements are immovably held against one another, there is no danger of falling below a required mutual minimum distance and wire elements made of bare wires can be used. These are insulated from the first winding arranged on the coil carrier by the tunnel-shaped winding carrier.
  • the winding support advantageously has in its curved part upward and outward open grooves or slots for receiving the curved areas of the U-shaped wire elements and in its two flat parts channels for receiving the straight areas of the U-shaped wire elements.
  • winding carrier has hook-shaped spring legs attached to both ends in its central curved part, which act in mutually facing direction on the end faces of the yokes of the cores, by means of which the winding carrier can be clamped onto the core and coil former.
  • the winding support is positioned exactly on the coil former in the direction of the longitudinal axis of the core legs. The pressure required for any gluing of the cores is generated by the action of the hook-shaped elements.
  • a further improvement in the mechanical stability before soldering in and easier insertion into the printed circuit board is given by the fact that the two regions of the winding support containing the channels are designed as flat plug strips and that these plug strips can be fitted into pockets with a snug fit a plate-shaped element, which can be arranged under the coil body, are arranged perpendicular to the plane thereof in such a way that the distance between their outer surfaces corresponds to the distance between the inner walls or inner edges of the outer legs of the cores.
  • the winding carrier is also positioned precisely on the coil body perpendicular to the direction of the longitudinal axis of the core legs.
  • An essentially double T-shaped coil body 1 has a tube-shaped middle part 2, the inner cross-section is matched to the diameter of the central Kernschen ⁇ leg 3, its outer contour can advantageously, as shown here, be designed U-shaped to match the winding shape of the primary winding, not shown here, the U-shaped winding shape of the secondary winding and thus reduce the spread.
  • the cross webs 4 are trough-shaped and serve to receive the yoke part 5 of the two cores 6. For this purpose, they have openings 7 for the passage of the outer legs 8 of the cores 6. At the ends 9 or extensions 10 of the crosspieces 4, soldering swords 11 are inserted, with the upper ends 12 of which the winding ends 13 are soldered and the lower ends 14 of which are provided for penetration into the printed circuit board.
  • the winding support 15 consists essentially of a tunnel-shaped part 16, 17 with an approximately U-shaped cross section, the flat parts 16 of which are designed as plug strips 18. These include channels 19 for receiving the straight regions 20 of the U-shaped wire elements 21. These channels 19 merge in the curved part 17 of the winding carrier 15 into grooves or grooves 22 which are open at the top and outside and for receiving the curved ones Areas 23 of the wire elements 21 are used. These wire elements 21 are thus in the inserted state mechanically well supported by the walls of the channels 19 and the grooves or grooves 22 and electrically well insulated from one another, so that insulation of the wire material is unnecessary and bare wires can be used.
  • transverse walls 24 are attached in the curved part 17 of the winding support 15 at its end edges, which are connected by longitudinal walls 25, which in turn merge into the plug strips 18.
  • hook-shaped elements 26 are added on both sides. These are connected by crossbars 27 to protect against breaking and buckling. Assembly and installation of the inductive circuit element according to the invention are simple and easy to explain.
  • the middle part 2 of the bobbin 1 made of plastic is wound in a conventional manner with the primary winding (s). This is not shown here.
  • the winding ends 13 are soldered to the upper ends 12 of the soldering swords 11.
  • the ferrite cores 6 are inserted into the coil former 1 from both sides, and if necessary their abutting surfaces 28 are previously coated with adhesive.
  • a further element in the form of an insulating material plate 29 with pockets 30 that are open at the bottom is then inserted from below.
  • the pockets 30 are arranged along two parallel edges 31 of the insulating material plate 29, their center distance and their wall thickness are selected such that the outer surfaces 32 of the pockets 30 abut the inner walls or inner edges of the outer legs 8 of the cores 6; the outer length of the pockets 30 corresponds to the distance between the mutually facing surfaces 34 of the transverse webs 4, so that the position of the insulating material plate 29 is precisely fixed by the pockets 30.
  • the inner dimensions of the pockets 30 are matched to the outer dimensions of the plug strip 18 to create a snug fit.
  • the insulating material plate 29 is provided with a trough-shaped recess 33 between the pockets 3.0 in order to securely deliver the winding cross section even under the central part 2 of the coil former 1.
  • the winding carrier 15 equipped with wire elements 21 is placed on the coil former 1 from above, the plug strips 18 being inserted into the pockets 30 and the hook-shaped elements 26 with their inner edges 35 being subjected to slight elastic deformation on the opposite end faces 36 of the core yokes 5 be pushed.
  • the winding support 15 in particular being secured against lateral displacements, so that even in the event of an intermediate storage prior to being soldered into the printed circuit board there is no fear of falling apart. Due to the exact positioning of the winding carrier 15 relative to the coil body 1, when the assembled circuit element is inserted into the circuit board, the ends of the wire elements 21 also meet the lower ends 14 of the soldering swords 11, which are arranged at constant mutual distances in the coil body 1 exactly on the assigned holes in the circuit board, so that the insertion can be carried out quickly and easily.

Abstract

It is known to make windings of inductive circuit elements for the assembly of printed circuit boards by bending wire elements into a U-shape, curving them over the core(s) and soldering their ends into conductive tracks with which they form complete windings. The wire elements are inserted individually in the printed circuit board. According to the invention, the wire elements (21) are laid and supported on a tunnel-shaped winding support (15) of essentially U-shaped cross-section. Embodiments which are advantageous for the electrical and mechanical properties are indicated in dependent claims.

Description

Induktives Schaltungselement für LeiterplattenmontageInductive circuit element for PCB mounting
Gegenstand der Erfindung ist ein induktives Schaltungselement für Leiterplatteπmontage mit einem wenigstens einen, vorzugs- weise jedoch mehrere durch Joche verbundene Schenkel aufweisen¬ den, zusammengesetzten Kern, wobei die Längsachsen der Schen¬ kel parallel und äquidistant zur Leiterplatte angeordnet werden und bei dem mindestens ein Schenkel einen Spulenkörper mit ei¬ ner in herkömmlicher Weise aufgebrachten ersten Wicklung auf- weist und eine zweite Wicklung vorgesehen ist, die aus bügei¬ förmigen, U-förmig gebogenen Drahtelementen besteht, die den oder die Schenkel des Kerns überwölben und die zusammen mit Leiterbahnen in die ihre Enden eingelötet werden, vollständige Windungen bilden.The invention relates to an inductive circuit element for printed circuit board assembly with an at least one, but preferably a plurality of legs connected by yokes, having a composite core, the longitudinal axes of the legs being arranged parallel and equidistant to the printed circuit board and in the at least one leg has a coil former with a first winding applied in a conventional manner and a second winding is provided which consists of bow-shaped, U-shaped wire elements which arch over the leg or legs of the core and which together with conductor tracks into the their ends are soldered in, forming complete turns.
Im Stand der Technik ist es bekannt, für viele Gerätetypen, die getaktet betrieben werden, wie z.B. DC/DC-Wandler, Hoch- setzsteller, Tiefsetzsteller etc., hohe Schaltfrequenzen an¬ zuwenden, da damit sowohl eine Reduktion der Eisenquerschnitte von induktiven Elementen als auch eine Verringerung der Win¬ dungszahlen wegen der hohen Windungsspannungswerte ermöglicht ist. Weiterhin ist es bekannt, bei den erforderlichen induk¬ tiven Schaltungselementen wie Übertragern oder Drosseln soweit sie auf Leiterplatten angeordnet werden die sekundären, den höheren Strom führenden Wicklungen dadurch zu realisieren, daß man bügeiförmige U-förmige Drahtelemente benützt, die den Schenkelquerschnitt überwölben und in die Leiterplatte einzeln und parallel zueinander eingesteckt werden, so daß sie zusammen mit entsprechenden Leiterbahnen, mit denen sie verlötet werden, vollständige Windungen bilden.It is known in the prior art for many types of devices that are operated in a clocked manner, e.g. DC / DC converters, step-up converters, step-down converters etc., high switching frequencies to be used, since this enables both a reduction in the iron cross-sections of inductive elements and a reduction in the number of turns due to the high winding voltage values. Furthermore, it is known to implement the secondary, higher current-carrying windings in the necessary inductive circuit elements such as transformers or chokes insofar as they are arranged on printed circuit boards by using bow-shaped U-shaped wire elements which arch the leg cross section and into which Printed circuit board are inserted individually and parallel to each other, so that they form complete turns together with corresponding conductor tracks with which they are soldered.
Derartige induktive Schaltelemente sind im Stand der Technik bekannt. Bei der DE-OS 33 06 923 (Grundig) dienen bügeiförmige Windungselemente im Verband mit passend angeordneten Leiter- bahnen zur Spulenbildung und schließen einen Kunststoffkörper mit quadratischem Querschnitt ein, der einen Schraubkern ent- hält. Aus der US-PS 47 77 465 (Meinel) ist ein im wesentlichen O-förmiger Kern bekannt, der durch eingelötete Windungsbügel, die zur Bildung zweier, auf beide Schenkel verteilter Wicklun¬ gen dienen, auf der Platine gehalten wird.Such inductive switching elements are known in the prior art. In DE-OS 33 06 923 (Grundig), bow-shaped winding elements in association with suitably arranged conductor tracks are used to form coils and enclose a plastic body with a square cross section, which contains a screw core. holds. From US-PS 47 77 465 (Meinel) an essentially O-shaped core is known which is held on the circuit board by soldered-in winding brackets which serve to form two windings distributed over both legs.
Diese Technik hat den Vorteil, daß die Wicklung durch Verwen¬ dung vorgeformter Drahtelemente in der gewünschten Konfigura¬ tion einfach herzustellen ist und ein herkömmlicher Wickelvor¬ gang entfällt. Sie weist jedoch in der bekannten Form Nachteile auf. Die Drahtelemente müssen einzeln eingesteckt werden, sie sind bis zur Verlötung nur wenig mechanisch gesichert, können sich also unzulässig nahe kommen und müssen daher aus isolier¬ tem Draht bestehen. Dies verursacht Mehrarbeit durch das Abiso¬ lieren der Enden und verringert die thermische Belastbarkeit.This technique has the advantage that the winding can be easily manufactured in the desired configuration by using preformed wire elements and a conventional winding process is not required. However, it has disadvantages in the known form. The wire elements must be inserted individually, they are only mechanically secured to a small extent until they are soldered, so they can come inappropriately close and must therefore consist of insulated wire. This causes additional work by stripping the ends and reduces the thermal load capacity.
Erfindungsgemäß werden diese Nachteile dadurch vermieden, daß die Drahtelemente auf einem tunnelförmigen Wicklungsträger mit im wesentlichen U-förmigen Querschnitt aufliegen und gehaltert sind. Der dadurch erzielte Vorteil liegt darin, daß die Draht- elemente durch einen automatisierbaren Vorgang in den Wicklungs¬ träger eingesetzt werden können und die so vormontierte Baugrup¬ pe in einem in die Leiterplatte eingesetzt werden kann. Da die Drahtelemente gegeneinander unverschieblich gehaltert sind, be¬ steht die Gefahr des Unterschreitens eines geforderten gegen- seitigen Mindestabstandes nicht und es können aus blanken Dräh¬ ten hergestellte Drahtelemente verwendet werden. Diese sind ge¬ genüber einer auf dem Spulenträger angeordneten ersten Wicklung durch den tunnelförmigen Wicklungsträger isoliert.According to the invention, these disadvantages are avoided in that the wire elements rest and are supported on a tunnel-shaped winding support with a substantially U-shaped cross section. The advantage achieved thereby is that the wire elements can be inserted into the winding support by an automatable process and the pre-assembled assembly can be inserted into the circuit board in one. Since the wire elements are immovably held against one another, there is no danger of falling below a required mutual minimum distance and wire elements made of bare wires can be used. These are insulated from the first winding arranged on the coil carrier by the tunnel-shaped winding carrier.
Vorteilhaft weist der Wicklungsträger in seinem gekrümmten Teil nach oben und außen offene Rinnen oder Nuten zur Aufnahme der gebogenen Bereiche der U-förmigen Drahtelemente und in seinen beiden ebenen Teilen Kanäle zur Aufnahme der geraden Bereiche der U-förmigen Drahtelemente auf. Der erzielte Vorteil liegt darin, daß die zwischen den Drahtelementen befindliche Kriech¬ strecke groß ist, was insbesondere dann von wesentlicher Bedeu- tung ist, wenn benachbarte Windungen unterschiedlichen Wick¬ lungen angehören.The winding support advantageously has in its curved part upward and outward open grooves or slots for receiving the curved areas of the U-shaped wire elements and in its two flat parts channels for receiving the straight areas of the U-shaped wire elements. The advantage achieved is that the creepage distance between the wire elements is large, which is then of particular importance. This is the case when adjacent turns belong to different turns.
Eine Vorteilhafte Ausgestaltung ist dadurch gekennzeichnet, daß der Wicklungsträger in seinem mittleren gekrümmten Teil an bei¬ den Enden angesetzte hakenförmige Federschenkel aufweist, die in zueinander weisender Richtung auf die Stirnflächen der Joche der Kerne wirken, mittels derer der Wicklungsträger auf Kern und Spulenkörper klemmbar ist. Dadurch ergibt sich vorteilhaft auch vor dem Aufbringen des induktiven Schaltungselementes auf die Leiterplatte ein guter mechanischer Zusammenhalt aller Tei¬ le, sodaß Lagerung und Transport problemlos möglich sind. Der Wicklungsträger wird in Richtung der Längsachse der Kernschen¬ kel exakt auf dem Spulenkörper positioniert. Der zu einer all- fälligen Verklebung der Kerne erforderliche Preßdruck wird durch die Wirkung der hakenförmigen Elemente erzeugt.An advantageous embodiment is characterized in that the winding carrier has hook-shaped spring legs attached to both ends in its central curved part, which act in mutually facing direction on the end faces of the yokes of the cores, by means of which the winding carrier can be clamped onto the core and coil former. This advantageously results in good mechanical cohesion of all the parts even before the inductive circuit element is applied to the printed circuit board, so that storage and transport are possible without problems. The winding support is positioned exactly on the coil former in the direction of the longitudinal axis of the core legs. The pressure required for any gluing of the cores is generated by the action of the hook-shaped elements.
Eine weitere Verbesserung der mechanischen Stabilität vor dem Einlöten sowie ein leichteres Einsetzen in die Leiterplatte ist dadurch gegeben, daß die beiden, die Kanäle beinhaltenden Bereiche des Wicklungsträgers als flache Steckleisten ausge¬ bildet sind und daß diese Steckleisten mit Paßsitz in Taschen einsteckbar sind, die auf einem plattenförmigen Element, wel¬ ches unter dem Spuleπkörper anordenbar ist, senkrecht zu dessen Ebene derart angeordnet sind, daß der Abstand zwischen ihren Außenflächen dem Abstand der Innenwände oder Innenkanten der äußeren Schenkel der Kerne entspricht. Es erfolgt dadurch auch eine genaue Positionierung des Wicklungsträgers auf dem Spulen¬ körper senkrecht zur Richtung der Längsachse der Kernscheπkel.A further improvement in the mechanical stability before soldering in and easier insertion into the printed circuit board is given by the fact that the two regions of the winding support containing the channels are designed as flat plug strips and that these plug strips can be fitted into pockets with a snug fit a plate-shaped element, which can be arranged under the coil body, are arranged perpendicular to the plane thereof in such a way that the distance between their outer surfaces corresponds to the distance between the inner walls or inner edges of the outer legs of the cores. As a result, the winding carrier is also positioned precisely on the coil body perpendicular to the direction of the longitudinal axis of the core legs.
Anhand eines in der Zeichnung dargestellten Ausführungsbei¬ spieles soll nachfolgend das Wesen der Erfindung näher er¬ läutert werden.The essence of the invention is to be explained in more detail below with reference to an exemplary embodiment shown in the drawing.
Ein im wesentlichen doppel T-förmig ausgebildeter Spulenkörper 1 weist einen rohrför ig ausgebildeten Mittelteil 2 auf, dessen innerer Querschnitt auf den Durchmesser des mittleren Kernschen¬ kels 3 abgestimmt ist, seine äußere Kontur kann vorteilhaft, wie hier gezeigt, U-förmig gestaltet sein, um die Windungsform der hier nicht dargestellten Primärwicklung der U-förmigen Windungs- form der Sekundärwicklung anzugleichen und damit die Streuung zu vermindern. Die angesetzten Querstege 4 sind trogförmig aus¬ geführt und dienen zur Aufnahme des Jochteiles 5 der beiden Ker¬ ne 6. Dazu weisen sie Öffnungen 7 zum Durchtritt der Außenschen¬ kel 8 der Kerne 6 auf. An den Enden 9 bzw. Verlängerungen 10 der Querstege 4 sind Lötschwerter 11 eingesetzt, mit deren ober¬ en Enden 12 die Wicklungsenden 13 verlötet werden und deren un¬ tere Enden 14 zum Einschwallen in die Leiterplatte vorgesehen sind.An essentially double T-shaped coil body 1 has a tube-shaped middle part 2, the inner cross-section is matched to the diameter of the central Kernschen¬ leg 3, its outer contour can advantageously, as shown here, be designed U-shaped to match the winding shape of the primary winding, not shown here, the U-shaped winding shape of the secondary winding and thus reduce the spread. The cross webs 4 are trough-shaped and serve to receive the yoke part 5 of the two cores 6. For this purpose, they have openings 7 for the passage of the outer legs 8 of the cores 6. At the ends 9 or extensions 10 of the crosspieces 4, soldering swords 11 are inserted, with the upper ends 12 of which the winding ends 13 are soldered and the lower ends 14 of which are provided for penetration into the printed circuit board.
Der Wicklungsträger 15 besteht wesentlich aus einem tunnelför¬ migen Teil 16, 17 mit etwa U-förmigen Querschnitt, dessen ebene Teile 16 als Steckleisten 18 ausgebildet sind. Diese beinhalten Kanäle 19 zur Aufnahme der geraden Bereiche 20 der U-förmig ge¬ stalteten Drahtelemente 21. Diese Kanäle 19 gehen im gekrümmten Teil 17 des Wicklungsträgers 15 in Nuten oder Rinnen 22 über, die nach oben und außen offen sind und zur Aufnahme der geboge¬ nen Bereiche 23 der Drahtelemente 21 dienen. Diese Drahtelemen¬ te 21 sind also im eingestecktem Zustand durch die Wände der Kanäle 19 und der Nuten oder Rinnen 22 mechanisch gut gehal- tert und elektrisch gut von einander isoliert sodaß eine Iso¬ lation des Drahtmaterials entbehrlich ist und blanke Drähte verwendet werden können.The winding support 15 consists essentially of a tunnel-shaped part 16, 17 with an approximately U-shaped cross section, the flat parts 16 of which are designed as plug strips 18. These include channels 19 for receiving the straight regions 20 of the U-shaped wire elements 21. These channels 19 merge in the curved part 17 of the winding carrier 15 into grooves or grooves 22 which are open at the top and outside and for receiving the curved ones Areas 23 of the wire elements 21 are used. These wire elements 21 are thus in the inserted state mechanically well supported by the walls of the channels 19 and the grooves or grooves 22 and electrically well insulated from one another, so that insulation of the wire material is unnecessary and bare wires can be used.
Zur Erhöhung der mechanischen Stabilität sind im gekrümmten Teil 17 des Wicklungsträgers 15 an dessen Endkanten Querwände 24 angesetzt, die durch Läπgswände 25 verbunden sind, die ihrer¬ seits in die Steckleisten 18 übergehen. In Fortsetzung dieser Längswände 25 sind beidseitig hakenförmige Elemente 26 ange¬ fügt. Diese sind zum Schutz gegen Abbrechen und Ausknicken durch Querstege 27 verbunden. Zusammenbau und Montage des erfindungsgemäßen induktiven Schal¬ tungselementes sind einfach und leicht erklärbar. Der Mittel¬ teil 2 des Spulenkörpers 1 aus Kunststoff wird in herkömmlicher Weise mit der oder den Primärwicklung(en) bewickelt. Dies ist hier nicht gezeigt. Die Wicklungsenden 13 werden an die oberen Enden 12 der Lötschwerter 11 angelötet. In den Spulenkörper 1 werden von beiden Seiten die Ferritkerne 6 eingeschoben, ggf. werden deren Stoßflächen 28 vorher mit Klebstoff bestrichen. Dann wird von unten ein weiteres Element in Form einer Isolier- stoffplatte 29 mit aufgesetzten, unten offenen Taschen 30 eingesetzt. Die Taschen 30 sind entlang zweier paralleler Kan¬ ten 31 der Isolierstoffplatte 29 angeordnet, ihr Mittenabstand und ihre Wandstärke sind so gewählt, daß die Außenflächen 32 der Taschen 30 an den Innenwänden oder Innenkanten der äußer- ren Schenkel 8 der Kerne 6 anliegen; die äußere Länge der Ta¬ schen 30 entspricht dem Abstand zwischen den einander zuge¬ kehrten Flächen 34 der Querstege 4, sodaß die Lage der Iso¬ lierstoffplatte 29 durch die Taschen 30 genau fixiert ist. Die Innenabmessungen der Taschen 30 sind auf die Außenabmessungen der Steckleisteπ 18 zur Schaffung eines Paßsitzes abgestimmt. Die Isolierstoffplatte 29 ist zwischen den Taschen 3.0 mit einer muldenförmigen Eintiefung 33 versehen, um den Wickelquerschnitt auch unter dem Mittelteil 2 des Spulenkörpers 1 sicher zustel¬ len.To increase the mechanical stability, transverse walls 24 are attached in the curved part 17 of the winding support 15 at its end edges, which are connected by longitudinal walls 25, which in turn merge into the plug strips 18. In continuation of these longitudinal walls 25, hook-shaped elements 26 are added on both sides. These are connected by crossbars 27 to protect against breaking and buckling. Assembly and installation of the inductive circuit element according to the invention are simple and easy to explain. The middle part 2 of the bobbin 1 made of plastic is wound in a conventional manner with the primary winding (s). This is not shown here. The winding ends 13 are soldered to the upper ends 12 of the soldering swords 11. The ferrite cores 6 are inserted into the coil former 1 from both sides, and if necessary their abutting surfaces 28 are previously coated with adhesive. A further element in the form of an insulating material plate 29 with pockets 30 that are open at the bottom is then inserted from below. The pockets 30 are arranged along two parallel edges 31 of the insulating material plate 29, their center distance and their wall thickness are selected such that the outer surfaces 32 of the pockets 30 abut the inner walls or inner edges of the outer legs 8 of the cores 6; the outer length of the pockets 30 corresponds to the distance between the mutually facing surfaces 34 of the transverse webs 4, so that the position of the insulating material plate 29 is precisely fixed by the pockets 30. The inner dimensions of the pockets 30 are matched to the outer dimensions of the plug strip 18 to create a snug fit. The insulating material plate 29 is provided with a trough-shaped recess 33 between the pockets 3.0 in order to securely deliver the winding cross section even under the central part 2 of the coil former 1.
Nun wird zuletzt von oben der mit Drahtelementen 21 bestückte Wicklungsträger 15 auf den Spulenkörper 1 aufgesetzt, wobei die Steckleisten 18 in die Taschen 30 eingeschoben werden und die hakenförmigen Elemente 26 unter geringer elastischer Verformung mit ihren Innenkanten 35 auf die einander entgegengesetzten Stirnflächen 36 der Kernjoche 5 geschoben werden.Finally, the winding carrier 15 equipped with wire elements 21 is placed on the coil former 1 from above, the plug strips 18 being inserted into the pockets 30 and the hook-shaped elements 26 with their inner edges 35 being subjected to slight elastic deformation on the opposite end faces 36 of the core yokes 5 be pushed.
Auf diese Weise wird ein guter Zusammenhalt aller Elemente er¬ reicht, wobei insbesondere der Wicklungsträger 15 gegen seit- liehe Verschiebungen gesichert ist, sodaß auch bei einer even¬ tuellen Zwischenlagerung vor dem Einlöten in die Leiterplatte kein Auseinanderfallen zu befürchten ist. Durch die genaue Positionierung des Wicklungsträgers 15 gegenüber dem Spulen¬ körper 1 treffen beim Einsetzen des zusammengestellten Schal¬ tungselementes in die Leiterplatte neben den unteren Enden 14 der Lötschwerter 11, die mit unveränderlichen gegenseitigen Abständen im Spulenkörper 1 angeordnet sind, auch die Enden der Drahtelemente 21 genau auf die zugeordneten Bohrungen in der Leiterplatte, sodaß das Einsetzen rasch und einfach durch¬ führbar ist. In this way, a good cohesion of all elements is achieved, the winding support 15 in particular being secured against lateral displacements, so that even in the event of an intermediate storage prior to being soldered into the printed circuit board there is no fear of falling apart. Due to the exact positioning of the winding carrier 15 relative to the coil body 1, when the assembled circuit element is inserted into the circuit board, the ends of the wire elements 21 also meet the lower ends 14 of the soldering swords 11, which are arranged at constant mutual distances in the coil body 1 exactly on the assigned holes in the circuit board, so that the insertion can be carried out quickly and easily.

Claims

Patentansprüche: Claims:
1. Induktives Schaltungselement für Leiterplattenmontage mit einem wenigstens einen vorzugsweise jedoch mehrere durch Joche verbundene Schenkel aufweisenden zusammengesetzten Kern, wobei die Längsachsen der Schenkel parallel und äquidistant zur Lei¬ terplatte angeordnet werden und bei dem mindestens ein Schen¬ kel einen Spulenkörper mit einer in herkömmlicher Weise aufge¬ brachten ersten Wicklung aufweist und eine zweite Wicklung vorgesehen ist, die aus bügeiförmigen, U-förmig gebogenen Drahtelementen besteht, die den oder die Schenkel des Kerns überwölben und die zusammen mit Leiterbahnen, in die ihre En¬ den eingelötet werden vollständige Windungen bilden, d a ¬ d u r c h g e k e n n z e i c h n e t, daß die Drahtelemen- te 21 auf einem tunnelförmigen Wicklungsträger 15 mit im we¬ sentlichen U-förmigem Querschnitt aufliegen und gehaltert sind.1. Inductive circuit element for circuit board assembly with at least one but preferably a plurality of legs connected by yokes having a composite core, the longitudinal axes of the legs being arranged parallel and equidistant to the circuit board and with the at least one leg being a coil former with a conventional method applied first winding and a second winding is provided, which consists of bow-shaped, U-shaped wire elements which arch over the leg or legs of the core and which, together with conductor tracks into which their ends are soldered, form complete turns, da ¬ characterized in that the wire elements 21 rest on a tunnel-shaped winding support 15 with a substantially U-shaped cross section and are held.
2. Induktives Schaltungselement nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Wicklungsträger 15 in seinem gekrümmten Teil 17 nach oben und außen offene Rinnen oder Nuten 22 zur Aufnahme der gebogenen Bereiche 23 der U-för¬ migen Drahtelemente 21 aufweist und in seinen beiden ebenen Tei¬ len 16 Kanäle 19 zur Aufnahme der geraden Bereiche 20 der U-för¬ migen Drahtelemente 21 aufweist.2. Inductive circuit element according to claim 1, characterized in that the winding support 15 has in its curved part 17 upwards and outwards open grooves or grooves 22 for receiving the curved regions 23 of the U-shaped wire elements 21 and in its two flat Tei¬ len 16 channels 19 for receiving the straight regions 20 of the U-shaped wire elements 21.
3. Induktives Schaltungselement nach Anspruch 1 und 2, d a ¬ d u r c h g e k e n n z e i c h n e t , daß der Wicklungs¬ träger 15 in seinem mittleren gekrümmten Teil 17 an beiden En¬ den angesetzte hakenförmige Federschenkel 26 aufweist, die in zueinander weisender Richtung auf die äußeren Stirnflächen 36 der Joche 5 der Kerne 6 wirken, mittels derer der Wicklungs¬ träger 15 auf Kern 6 und Spulenkörper 1 klemmbar ist. 3. Inductive circuit element according to claim 1 and 2, since ¬ characterized in that the winding support 15 in its central curved part 17 at both ends has the hook-shaped spring legs 26 attached, which point in the mutually facing direction to the outer end faces 36 of the yokes 5th the cores 6 act, by means of which the winding support 15 can be clamped onto the core 6 and the coil former 1.
4. Induktives Schaltungselement nach einem der vorherigen An¬ sprüche, d a d u r c h g e k e n n z e i c h n e t , daß die beiden die Kanäle 19 beinhaltenden Teile 16 des Wicklungs¬ trägers 15 als flache Steckleisten 18 ausgebildet sind und daß diese Steckleisten 18 mit Paßsitz in Taschen 30 einsteckbar sind, die auf einem plattenformigen Element 29, welches unter dem Spulenkörper 1 angeordnet ist, senkrecht zu dessen Ebene derart angeordnet sind, daß der Abstand zwischen ihren Außen¬ flächen (32) dem Abstand der Innenwände oder Innenkanten der äußeren Schenkel (8) der Kerne (6) entspricht. 4. Inductive circuit element according to one of the preceding claims, characterized in that the two parts 16 of the winding support 15 including the channels 19 are designed as flat plug strips 18 and that these plug strips 18 can be fitted with a fit into pockets 30 which are on a plate-shaped element 29, which is arranged under the coil former 1, is arranged perpendicular to its plane in such a way that the distance between its outer surfaces (32) corresponds to the distance between the inner walls or inner edges of the outer legs (8) of the cores (6).
PCT/EP1991/000453 1990-03-29 1991-03-11 Inductive circuit element for assembly of printed circuit broads WO1991015021A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT91906312T ATE125060T1 (en) 1990-03-29 1991-03-11 INDUCTIVE CIRCUIT ELEMENT FOR PCB MOUNTING.
DE59105970T DE59105970D1 (en) 1990-03-29 1991-03-11 INDUCTIVE CIRCUIT ELEMENT FOR PCB ASSEMBLY.
EP91906312A EP0479966B1 (en) 1990-03-29 1991-03-11 Inductive circuit element for assembly of printed circuit broads

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA729/90 1990-03-29
AT729/90A AT393179B (en) 1990-03-29 1990-03-29 INDUCTIVE CIRCUIT ELEMENT FOR PCB ASSEMBLY

Publications (1)

Publication Number Publication Date
WO1991015021A1 true WO1991015021A1 (en) 1991-10-03

Family

ID=3498269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/000453 WO1991015021A1 (en) 1990-03-29 1991-03-11 Inductive circuit element for assembly of printed circuit broads

Country Status (4)

Country Link
EP (1) EP0479966B1 (en)
AT (2) AT393179B (en)
DE (1) DE59105970D1 (en)
WO (1) WO1991015021A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314689A (en) * 1996-06-26 1998-01-07 Gen Electric Coil assembly
DE102013200265A1 (en) * 2013-01-10 2014-07-10 SUMIDA Components & Modules GmbH Small transformer for high output voltage, used in e.g. motor car, has two neighboring winding portions of second winding separated by appropriate winding portion of first winding, and a core material set as non-closed magnetic circuit
DE10013206B4 (en) * 2000-03-17 2015-02-12 Tridonic Gmbh & Co Kg transformer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399438B (en) * 1991-06-21 1995-05-26 Siemens Ag Oesterreich PCB TRANSFORMER TRANSFORMER

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB771701A (en) * 1955-01-07 1957-04-03 Murphy Radio Ltd Inductance coils
FR2181464A1 (en) * 1972-04-25 1973-12-07 Barthalon Maurice
DE2445143A1 (en) * 1974-09-20 1976-04-01 Siemens Ag Electric converting transformer with narrowly defined coupled windings - has conductors embedded in insulating material to form flat strip cable
FR2394160A1 (en) * 1977-06-06 1979-01-05 Philips Nv TRANSFORMER
WO1985001387A1 (en) * 1983-09-19 1985-03-28 American Telephone & Telegraph Company Ferrite choke coil assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB771701A (en) * 1955-01-07 1957-04-03 Murphy Radio Ltd Inductance coils
FR2181464A1 (en) * 1972-04-25 1973-12-07 Barthalon Maurice
DE2445143A1 (en) * 1974-09-20 1976-04-01 Siemens Ag Electric converting transformer with narrowly defined coupled windings - has conductors embedded in insulating material to form flat strip cable
FR2394160A1 (en) * 1977-06-06 1979-01-05 Philips Nv TRANSFORMER
WO1985001387A1 (en) * 1983-09-19 1985-03-28 American Telephone & Telegraph Company Ferrite choke coil assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314689A (en) * 1996-06-26 1998-01-07 Gen Electric Coil assembly
US6084359A (en) * 1996-06-26 2000-07-04 General Electric Company Coil assembly for an electrodeless fluorescent lamp
DE10013206B4 (en) * 2000-03-17 2015-02-12 Tridonic Gmbh & Co Kg transformer
DE102013200265A1 (en) * 2013-01-10 2014-07-10 SUMIDA Components & Modules GmbH Small transformer for high output voltage, used in e.g. motor car, has two neighboring winding portions of second winding separated by appropriate winding portion of first winding, and a core material set as non-closed magnetic circuit

Also Published As

Publication number Publication date
DE59105970D1 (en) 1995-08-17
EP0479966A1 (en) 1992-04-15
AT393179B (en) 1991-08-26
EP0479966B1 (en) 1995-07-12
ATE125060T1 (en) 1995-07-15
ATA72990A (en) 1991-01-15

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