EP0479966B1 - Element de circuit inductif pour le montage de cartes imprimees - Google Patents

Element de circuit inductif pour le montage de cartes imprimees Download PDF

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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
Application number
EP91906312A
Other languages
German (de)
English (en)
Other versions
EP0479966A1 (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
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 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

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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 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.

Landscapes

  • 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)

Claims (4)

  1. Elément de circuit inductif pour le montage de plaquettes imprimées, avec un noyau composite (5) comportant au moins une branche, et de préférence plusieurs branches (3, 8) reliées par des barres transversales (5), dans lequel les axes longitudinaux des branches sont disposés parallèlement et à équidistance de la plaquette imprimée, et dans lequel au moins une branche comporte un corps de bobine (1) avec un premier enroulement réalisé de façon usuelle, et il est prévu un deuxième enroulement qui est formé d'éléments en fil (21) en forme d'étrier, recourbés en U, qui forment une surépaisseur sur les branches du noyau et forment des spires complètes conjointement avec des pistes conductrices dans lesquelles leurs extrémités sont soudées, caractérisé en ce que les éléments en fil (21) sont appliqués et fixés sur un support d'enroulement (15) en forme de tunnel avec une section transversale essentiellement en U.
  2. Elément de circuit inductif selon la revendication 1, caractérisé en ce que le support d'enroulement (15), dans sa partie arquée (17), comporte des rigoles ou rainures (22) ouvertes vers le haut et vers l'extérieur pour recevoir les zones incurvées (23) des éléments en fil (21) en forme de U, et comporte, dans ses deux parties planes (16), des canaux (19) pour recevoir les zones rectilignes (20) des éléments en fil (21) en U.
  3. Elément de circuit inductif selon la revendication 1 ou 2, caractérisé en ce que le support d'enroulement (15) comporte, aux deux extrémités de sa partie arquée centrale (17), des branches de ressort (26) en forme de crochet, qui agissent dans une même direction sur les faces frontales extérieures (36) des barres transversales (5) des noyaux (6), au moyen desquelles le support d'enroulement (15) peut être fixé par serrage sur le noyau (6) et le corps de bobine (1).
  4. Elément de circuit inductif selon l'une des revendications précédentes, caractérisé en ce que les deux parties (16) du support d'enroulement (15) contenant les canaux (19) ont la forme de montants enfichables plats (18) et que ces montants enfichables (18) peuvent être enfichés avec un ajustement étroit dans des poches (30) qui sont disposées sur un élément (29) en forme de plaque, qui est disposé au-dessous du corps de bobine (1), perpendiculairement au plan dudit élément (29), d'une manière telle que l'écart entre les faces extérieures (32) desdites poches correspond à l'écart entre les parois intérieures ou les bords intérieurs des branches extérieures (8) des noyaux (6).
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 EP0479966A1 (fr) 1992-04-15
EP0479966B1 true 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.
DE8490152U1 (de) * 1983-09-19 1985-08-14 American Telephone And Telegraph Co., New York, N.Y. Ferrit-Drosselspulenanordnung

Also Published As

Publication number Publication date
AT393179B (de) 1991-08-26
DE59105970D1 (de) 1995-08-17
ATE125060T1 (de) 1995-07-15
EP0479966A1 (fr) 1992-04-15
WO1991015021A1 (fr) 1991-10-03
ATA72990A (de) 1991-01-15

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