EP0479966A1 - Element de circuit inductif pour le montage de cartes imprimees. - Google Patents

Element de circuit inductif pour le montage de cartes imprimees.

Info

Publication number
EP0479966A1
EP0479966A1 EP91906312A EP91906312A EP0479966A1 EP 0479966 A1 EP0479966 A1 EP 0479966A1 EP 91906312 A EP91906312 A EP 91906312A EP 91906312 A EP91906312 A EP 91906312A EP 0479966 A1 EP0479966 A1 EP 0479966A1
Authority
EP
European Patent Office
Prior art keywords
shaped
winding
wire elements
legs
winding support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91906312A
Other languages
German (de)
English (en)
Other versions
EP0479966B1 (fr
Inventor
Edwin Hofbauer
Wolfgang Spitaler
Franz Ramlohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG Oesterreich
Original Assignee
Siemens AG Oesterreich
Siemens AG
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 AG Oesterreich, Siemens AG filed Critical Siemens AG Oesterreich
Publication of EP0479966A1 publication Critical patent/EP0479966A1/fr
Application granted granted Critical
Publication of EP0479966B1 publication Critical patent/EP0479966B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Filters And Equalizers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

Dans le domaine des éléments de circuit inductifs utilisés pour le montage de cartes imprimées, on fabrique, selon un procédé connu des enroulements à partir d'éléments de fil courbés en U qui entourent le ou les noyaux et forment avec des pistes conductrices, dans lesquelles leurs extrémités sont soudées, des spires complètes. Pour cela, les éléments de fil sont insérés individuellement dans la carte imprimée. Selon l'invention, il est prévu un support d'enroulement en forme de tunnel (15) avec une section essentiellement en U sur lequel reposent et sont fixés les éléments de fil (21). Des réalisations avantageuses quant à leurs propriétés électriques et mécaniques sont indiquées dans les sous-revendications.
EP91906312A 1990-03-29 1991-03-11 Element de circuit inductif pour le montage de cartes imprimees Expired - Lifetime EP0479966B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT729/90A AT393179B (de) 1990-03-29 1990-03-29 Induktives schaltungselement fuer leiterplattenmontage
AT729/90 1990-03-29
PCT/EP1991/000453 WO1991015021A1 (fr) 1990-03-29 1991-03-11 Element de circuit inductif pour le montage de cartes imprimees

Publications (2)

Publication Number Publication Date
EP0479966A1 true EP0479966A1 (fr) 1992-04-15
EP0479966B1 EP0479966B1 (fr) 1995-07-12

Family

ID=3498269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91906312A Expired - Lifetime EP0479966B1 (fr) 1990-03-29 1991-03-11 Element de circuit inductif pour le montage de cartes imprimees

Country Status (4)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399438B (de) * 1991-06-21 1995-05-26 Siemens Ag Oesterreich Transformator für printplattenmontage
GB2314689A (en) * 1996-06-26 1998-01-07 Gen Electric Coil assembly
DE10013206B4 (de) * 2000-03-17 2015-02-12 Tridonic Gmbh & Co Kg Transformator
DE102013200265A1 (de) * 2013-01-10 2014-07-10 SUMIDA Components & Modules GmbH Kleintransformator für hohe Ausgangsspannungen

Family Cites Families (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
FR2181464B1 (fr) * 1972-04-25 1976-08-06 Barthalon Maurice
DE2445143C2 (de) * 1974-09-20 1982-11-25 Siemens AG, 1000 Berlin und 8000 München Elektrischer Übertrager
NL178373C (nl) * 1977-06-06 1986-03-03 Philips Nv Transformator.
WO1985001387A1 (fr) * 1983-09-19 1985-03-28 American Telephone & Telegraph Company Assemblage de bobine d'arret en ferrite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9115021A1 *

Also Published As

Publication number Publication date
AT393179B (de) 1991-08-26
WO1991015021A1 (fr) 1991-10-03
ATA72990A (de) 1991-01-15
EP0479966B1 (fr) 1995-07-12
DE59105970D1 (de) 1995-08-17
ATE125060T1 (de) 1995-07-15

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