EP0479966B1 - Inductive circuit element for assembly of printed circuit broads - Google Patents
Inductive circuit element for assembly of printed circuit broads Download PDFInfo
- Publication number
- EP0479966B1 EP0479966B1 EP91906312A EP91906312A EP0479966B1 EP 0479966 B1 EP0479966 B1 EP 0479966B1 EP 91906312 A EP91906312 A EP 91906312A EP 91906312 A EP91906312 A EP 91906312A EP 0479966 B1 EP0479966 B1 EP 0479966B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaped
- winding
- wire elements
- core
- switching element
- 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
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Classifications
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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
- H01F27/30—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 a composite core having at least one, but preferably a plurality of legs connected by yokes, the longitudinal axes of the legs being arranged parallel and equidistant from the printed circuit board, and the at least one leg being a coil former with a conventional one Has applied first winding and a second winding is provided, which consists of bow-shaped, U-shaped bent wire elements that arch the leg or legs of the core and which together with conductor tracks in which their ends are soldered, form 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 until soldered, so they can come too close and must therefore consist of insulated wire. This causes extra work by stripping the ends and reduces the thermal load.
- the wire elements rest and are supported on a tunnel-shaped winding support with a substantially U-shaped cross section.
- the advantage achieved in this way is that the wire elements can be inserted into the winding support by an automatable process and the assembly which has been preassembled in this way can be inserted into the circuit board. Since the wire elements are immovably held against each other, there is no danger of the mutual minimum distance falling short and wire elements made of bare wires can be used. These are insulated from a 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.
- an advantageous embodiment is characterized in that the winding carrier has hook-shaped spring legs attached at 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 the bobbin.
- This advantageously results in good mechanical cohesion of all parts even before the inductive circuit element is applied to the printed circuit board, so that storage and transport are possible without any problems.
- the winding support is positioned exactly on the coil former in the direction of the longitudinal axis of the core legs. The pressing 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 and easier insertion into the printed circuit board is given in 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 which fit on a plate-shaped plate Element which can be arranged under the bobbin, are arranged perpendicular to the plane thereof such 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. This also results in an exact positioning of the winding support on the coil former perpendicular to the direction of the longitudinal axis of the core legs.
- An essentially double T-shaped coil body 1 has a tubular middle part 2, the inner cross section is matched to the diameter of the central core leg 3, its outer contour can advantageously, as shown here, be U-shaped in order to match the winding shape of the primary winding, not shown here, to the U-shaped winding shape of the secondary winding and thus to reduce the scatter .
- 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 tabs 11 are inserted, the upper ends 12 of which are used to solder the winding ends 13 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 contain channels 19 for receiving the straight areas 20 of the U-shaped wire elements 21. These channels 19 merge in the curved part 17 of the winding support 15 into grooves or grooves 22 which are open at the top and outside and for receiving the curved areas 23 serve the wire elements 21. These wire elements 21 are thus mechanically well held in the inserted state by the walls of the channels 19 and the grooves or grooves 22 and well insulated from one another electrically, so that insulation of the wire material is unnecessary and bare wires can be used.
- transverse walls 24 are attached to the end edges of the winding carrier 15 in the curved part 17, which are connected by longitudinal walls 25, which in turn merge into the plug strips 18. 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.
- 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 attached, open pockets 30 is then inserted from below.
- the pockets 30 are arranged along two parallel edges 31 of the insulating plate 29, their center distance and their wall thickness are chosen so 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 inside dimensions of the pockets 30 are matched to the outside dimensions of the plug strips 18 to create a snug fit.
- the insulating plate 29 is provided between the pockets 30 with a trough-shaped recess 33 in order to ensure the winding cross section also 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 carrier 15 in particular being secured against lateral displacements, so that even in the case of a possible intermediate storage before being soldered into the circuit board there is no fear of falling apart. Due to the exact positioning of the winding carrier 15 relative to the coil former 1, when the assembled circuit element is inserted into the printed circuit board, the ends of the soldering swords 11, which are arranged with constant mutual distances in the coil former 1, also meet the ends of the wire elements 21 exactly when the assembled circuit element is inserted Bores in the circuit board so that the insertion can be carried out quickly and easily.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
- Emergency Protection Circuit Devices (AREA)
- Filters And Equalizers (AREA)
- Burglar Alarm Systems (AREA)
Abstract
Description
Gegenstand der Erfindung ist ein 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 Leiterplatte angeordnet werden und bei dem mindestens ein Schenkel einen Spulenkörper mit einer in herkömmlicher Weise aufgebrachten ersten Wicklung aufweist und eine zweite Wicklung vorgesehen ist, die aus bügelförmigen, 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 a composite core having at least one, but preferably a plurality of legs connected by yokes, the longitudinal axes of the legs being arranged parallel and equidistant from the printed circuit board, and the at least one leg being a coil former with a conventional one Has applied first winding and a second winding is provided, which consists of bow-shaped, U-shaped bent wire elements that arch the leg or legs of the core and which together with conductor tracks in which their ends are soldered, form complete turns.
Im Stand der Technik ist es bekannt, für viele Gerätetypen, die getaktet betrieben werden, wie z.B. DC/DC-Wandler, Hochsetzsteller, Tiefsetzsteller etc., hohe Schaltfrequenzen anzuwenden, da damit sowohl eine Reduktion der Eisenquerschnitte von induktiven Elementen als auch eine Verringerung der Windungszahlen wegen der hohen Windungsspannungswerte ermöglicht ist. Weiterhin ist es bekannt, bei den erforderlichen induktiven Schaltungselementen wie Übertragern oder Drosseln soweit sie auf Leiterplatten angeordnet werden die sekundären, den höheren Strom führenden Wicklungen dadurch zu realisieren, daß man bügelförmige 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., use high switching frequencies, 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 realize the secondary windings carrying the higher current 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 over the leg cross section and into the printed circuit board individually and are inserted parallel to one another 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 bügelförmige Windungselemente im Verband mit passend angeordneten Leiterbahnen zur Spulenbildung und schließen einen Kunststoffkörper mit quadratischem Querschnitt ein, der einen Schraubkern enthält. 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 Wicklungen 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. 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 Verwendung vorgeformter Drahtelemente in der gewünschten Konfiguration einfach herzustellen ist und ein herkömmlicher Wickelvorgang 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 isoliertem Draht bestehen. Dies verursacht Mehrarbeit durch das Abisolieren 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 until soldered, so they can come too close and must therefore consist of insulated wire. This causes extra work by stripping the ends and reduces the thermal load.
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 Drahtelemente durch einen automatisierbaren Vorgang in den Wicklungsträger eingesetzt werden können und die so vormontierte Baugruppe in einem in die Leiterplatte eingesetzt werden kann. Da die Drahtelemente gegeneinander unverschieblich gehaltert sind, besteht die Gefahr des Unterschreitens eines geforderten gegenseitigen Mindestabstandes nicht und es können aus blanken Drähten hergestellte Drahtelemente verwendet werden. Diese sind gegenüber 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 in this way is that the wire elements can be inserted into the winding support by an automatable process and the assembly which has been preassembled in this way can be inserted into the circuit board. Since the wire elements are immovably held against each other, there is no danger of the mutual minimum distance falling short and wire elements made of bare wires can be used. These are insulated from a 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 Kriechstrecke groß ist, was insbesondere dann von wesentlicher Bedeutung ist, wenn benachbarte Windungen unterschiedlichen Wicklungen 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 is when adjacent turns belong to different windings.
Eine Vorteilhafte Ausgestaltung ist dadurch gekennzeichnet, daß der Wicklungsträger in seinem mittleren gekrümmten Teil an beiden 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 Teile, sodaß Lagerung und Transport problemlos möglich sind. Der Wicklungsträger wird in Richtung der Längsachse der Kernschenkel exakt auf dem Spulenkörper positioniert. Der zu einer allfälligen 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 at 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 the bobbin. This advantageously results in good mechanical cohesion of all parts even before the inductive circuit element is applied to the printed circuit board, so that storage and transport are possible without any problems. The winding support is positioned exactly on the coil former in the direction of the longitudinal axis of the core legs. The pressing 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 ausgebildet sind und daß diese Steckleisten mit Paßsitz in Taschen einsteckbar sind, die auf einem plattenförmigen Element, welches unter dem Spulenkörper 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 Spulenkörper senkrecht zur Richtung der Längsachse der Kernschenkel.A further improvement in the mechanical stability before soldering and easier insertion into the printed circuit board is given in 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 which fit on a plate-shaped plate Element which can be arranged under the bobbin, are arranged perpendicular to the plane thereof such 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. This also results in an exact positioning of the winding support on the coil former perpendicular to the direction of the longitudinal axis of the core legs.
Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles soll nachfolgend das Wesen der Erfindung näher erläutert werden.The essence of the invention is to be explained in more detail below with reference to an embodiment shown in the drawing.
Ein im wesentlichen doppel T-förmig ausgebildeter Spulenkörper 1 weist einen rohrförmig ausgebildeten Mittelteil 2 auf, dessen innerer Querschnitt auf den Durchmesser des mittleren Kernschenkels 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 Windungsform der Sekundärwicklung anzugleichen und damit die Streuung zu vermindern. Die angesetzten Querstege 4 sind trogförmig ausgeführt und dienen zur Aufnahme des Jochteiles 5 der beiden Kerne 6. Dazu weisen sie Öffnungen 7 zum Durchtritt der Außenschenkel 8 der Kerne 6 auf. An den Enden 9 bzw. Verlängerungen 10 der Querstege 4 sind Lötschwerter 11 eingesetzt, mit deren oberen Enden 12 die Wicklungsenden 13 verlötet werden und deren untere Enden 14 zum Einschwallen in die Leiterplatte vorgesehen sind.An essentially double T-shaped coil body 1 has a tubular middle part 2, the inner cross section is matched to the diameter of the central core leg 3, its outer contour can advantageously, as shown here, be U-shaped in order to match the winding shape of the primary winding, not shown here, to the U-shaped winding shape of the secondary winding and thus to reduce the scatter . The cross webs 4 are trough-shaped and serve to receive the
Der Wicklungsträger 15 besteht wesentlich aus einem tunnelförmigen 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 gestalteten 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 gebogenen Bereiche 23 der Drahtelemente 21 dienen. Diese Drahtelemente 21 sind also im eingestecktem Zustand durch die Wände der Kanäle 19 und der Nuten oder Rinnen 22 mechanisch gut gehaltert und elektrisch gut von einander isoliert sodaß eine Isolation des Drahtmaterials entbehrlich ist und blanke Drähte verwendet werden können.The
Zur Erhöhung der mechanischen Stabilität sind im gekrümmten Teil 17 des Wicklungsträgers 15 an dessen Endkanten Querwände 24 angesetzt, die durch Längswände 25 verbunden sind, die ihrerseits in die Steckleisten 18 übergehen. In Fortsetzung dieser Längswände 25 sind beidseitig hakenförmige Elemente 26 angefügt. Diese sind zum Schutz gegen Abbrechen und Ausknicken durch Querstege 27 verbunden.To increase the mechanical stability,
Zusammenbau und Montage des erfindungsgemäßen induktiven Schaltungselementes sind einfach und leicht erklärbar. Der Mittelteil 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 Isolierstoffplatte 29 mit aufgesetzten, unten offenen Taschen 30 eingesetzt. Die Taschen 30 sind entlang zweier paralleler Kanten 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 äußerren Schenkel 8 der Kerne 6 anliegen; die äußere Länge der Taschen 30 entspricht dem Abstand zwischen den einander zugekehrten Flächen 34 der Querstege 4, sodaß die Lage der Isolierstoffplatte 29 durch die Taschen 30 genau fixiert ist. Die Innenabmessungen der Taschen 30 sind auf die Außenabmessungen der Steckleisten 18 zur Schaffung eines Paßsitzes abgestimmt. Die Isolierstoffplatte 29 ist zwischen den Taschen 30 mit einer muldenförmigen Eintiefung 33 versehen, um den Wickelquerschnitt auch unter dem Mittelteil 2 des Spulenkörpers 1 sicher zustellen.Assembly and assembly 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
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
Auf diese Weise wird ein guter Zusammenhalt aller Elemente erreicht, wobei insbesondere der Wicklungsträger 15 gegen seitliche Verschiebungen gesichert ist, sodaß auch bei einer eventuellen Zwischenlagerung vor dem Einlöten in die Leiterplatte kein Auseinanderfallen zu befürchten ist. Durch die genaue Positionierung des Wicklungsträgers 15 gegenüber dem Spulenkörper 1 treffen beim Einsetzen des zusammengestellten Schaltungselementes 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 durchführbar ist.In this way, a good cohesion of all elements is achieved, the winding
Claims (4)
- An inductive switching element for the assembly of circuit boards having an assembled core (6) comprising at least one however preferably several limbs (38) connected by yokes (5), wherein the longitudinal axes of the limbs are disposed parallel with and equidistant to the circuit board and wherein at least one limb comprises a coil former (1) having a first winding applied in the conventional manner and a second winding is provided which consists of bracket-shaped, U-shaped curved wire elements (21), which overarch the limb(s) of the core and which together with the conductor strips, into which their ends are soldered, form complete windings, characterised in that the wire elements (21) are placed and held on a tunnel-shaped winding carrier (15) having a substantially U-shaped cross-section.
- An inductive switching element according to claim 1, characterised in that the winding carrier (15) comprises in its curved part (17) upward and outward open channels or grooves (22) for receiving the curved regions (23) of the U-shaped wire elements (21) and in its two planar parts (16) comprises ducts (19) for the purpose of receiving the straight regions (20) of the U-shaped wire elements (21).
- An inductive switching element according to claim 1 and 2, characterised in that the winding carrier (15) comprises in its centre curved part (17) hook-shaped resilient limbs (26) which are placed on both ends, which resilient limbs are effective in the direction facing each other on the outer end surfaces (36) of the yokes (5) of the cores (6), by means of which the winding carrier (15) can be clamped on the core (6) and the coil former (1).
- An inductive switching element according to any of the previous claims, characterised in that the two parts (16) of the winding carrier (15) which include the ducts (19) are formed as flat contact strips (18) and that these contract strips (18) can be inserted with a press-fit into the pockets (30), which are disposed on a plate-shaped element (29), which is disposed below the coil former (1), perpendicular to the plane thereof in such a manner that the distance between their outer surfaces (32) corresponds to the distance of the inner walls or inner edges of the outer limb (8) of the cores (6).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT729/90 | 1990-03-29 | ||
| AT729/90A AT393179B (en) | 1990-03-29 | 1990-03-29 | INDUCTIVE CIRCUIT ELEMENT FOR PCB ASSEMBLY |
| PCT/EP1991/000453 WO1991015021A1 (en) | 1990-03-29 | 1991-03-11 | Inductive circuit element for assembly of printed circuit broads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0479966A1 EP0479966A1 (en) | 1992-04-15 |
| EP0479966B1 true EP0479966B1 (en) | 1995-07-12 |
Family
ID=3498269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91906312A Expired - Lifetime EP0479966B1 (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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT399438B (en) * | 1991-06-21 | 1995-05-26 | Siemens Ag Oesterreich | PCB TRANSFORMER TRANSFORMER |
| GB2314689A (en) * | 1996-06-26 | 1998-01-07 | Gen Electric | Coil assembly |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB771701A (en) * | 1955-01-07 | 1957-04-03 | Murphy Radio Ltd | Inductance coils |
| FR2181464B1 (en) * | 1972-04-25 | 1976-08-06 | Barthalon Maurice | |
| DE2445143C2 (en) * | 1974-09-20 | 1982-11-25 | Siemens AG, 1000 Berlin und 8000 München | Electrical transmitter |
| NL178373C (en) * | 1977-06-06 | 1986-03-03 | Philips Nv | TRANSFORMER. |
| JPH051049Y2 (en) * | 1983-09-19 | 1993-01-12 |
-
1990
- 1990-03-29 AT AT729/90A patent/AT393179B/en not_active IP Right Cessation
-
1991
- 1991-03-11 EP EP91906312A patent/EP0479966B1/en not_active Expired - Lifetime
- 1991-03-11 AT AT91906312T patent/ATE125060T1/en not_active IP Right Cessation
- 1991-03-11 WO PCT/EP1991/000453 patent/WO1991015021A1/en active IP Right Grant
- 1991-03-11 DE DE59105970T patent/DE59105970D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991015021A1 (en) | 1991-10-03 |
| AT393179B (en) | 1991-08-26 |
| EP0479966A1 (en) | 1992-04-15 |
| ATA72990A (en) | 1991-01-15 |
| DE59105970D1 (en) | 1995-08-17 |
| ATE125060T1 (en) | 1995-07-15 |
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