EP0072451B1 - Procédé pour le montage et le réglage d'un transformateur - Google Patents

Procédé pour le montage et le réglage d'un transformateur Download PDF

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Publication number
EP0072451B1
EP0072451B1 EP82106525A EP82106525A EP0072451B1 EP 0072451 B1 EP0072451 B1 EP 0072451B1 EP 82106525 A EP82106525 A EP 82106525A EP 82106525 A EP82106525 A EP 82106525A EP 0072451 B1 EP0072451 B1 EP 0072451B1
Authority
EP
European Patent Office
Prior art keywords
stirrups
core
halves
bobbin
transformer
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
Application number
EP82106525A
Other languages
German (de)
English (en)
Other versions
EP0072451A1 (fr
Inventor
Jürgen Rensch
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT82106525T priority Critical patent/ATE18315T1/de
Publication of EP0072451A1 publication Critical patent/EP0072451A1/fr
Application granted granted Critical
Publication of EP0072451B1 publication Critical patent/EP0072451B1/fr
Expired 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support

Definitions

  • the invention relates to a method for assembling and adjusting a transformer, in particular for ballasts for gas discharge lamps or the like, with a divided core and a coil former, the core halves joined to the coil former being clamped between resilient profile legs by brackets extending in the direction of the coil axis, wherein the spring force of the profile legs is perpendicular to the coil axis.
  • Such transformers which are also known as stray field transformers, are known (DE-C-959 033).
  • stray field transformers are known (DE-C-959 033).
  • the existing low voltage is transformed up to a voltage suitable for the fluorescent tube.
  • such a transformer functions as an ignition device for the fluorescent tube because it first supplies the tube with a higher voltage, which breaks down to the so-called burning voltage when the tube is in nominal operation.
  • a major problem with such transformers is the adaptation of the operating parameters to the respective fluorescent tube, in particular the adaptation of the inductance of the transformer.
  • Transformers are known in which the distance between the core halves is set by a so-called air gap insert. The two core halves are then held in a bracket system and are pressed together in the direction of the coil axis by means of a spring. This means that the inductance of such a transformer can only be set very inaccurately, because the core halves themselves have very considerable manufacturing tolerances that affect the inductance, and the inductance is also influenced very significantly by very small changes in the spacing of the core halves. This influence increases with decreasing size of the transformers, so that their inductance can deviate up to 25% from the desired value.
  • transformers in particular transformers with a shell core, whose operating parameters can be set mechanically, e.g. with an adjustable thread core.
  • Other transformers have adjustable yokes or the like.
  • Such a mechanical adjustment is only possible with transformers that have sufficiently large dimensions. If the dimensions of the transformer are of the order of 1-2 cm or less, such devices can no longer be accommodated.
  • the object of the invention is to provide a method of the type described in the introduction with which the characteristics of transformers, in particular also of transformers with small dimensions and with sintered cores, can be set reliably and permanently.
  • the core halves lie at a mutual distance between the resilient profile legs, that the core halves are then moved towards one another in the direction of the coil axis while overcoming the spring-force-related frictional forces acting on them and under the control of a measuring device connected to the coil former, until the measuring device indicates the desired value, and that the core halves are then cold welded or glued to the brackets.
  • the core halves can only move against one another during the adjustment under the action of external, defined forces and can not carry out any undesired return movements. Even after completion of the adjustment process in the relative position reached, no restoring forces are effective and the core halves can be fixed. This is only possible because the core halves are not clamped between resilient profile legs, the spring force of which is directed perpendicular to the coil axis. In other words, this spring force is directed perpendicular to the external displacement force. Therefore, it cannot lead to a subsequent, undesirable displacement of the two core halves.
  • the spring force directed perpendicular to the coil axis and thus to the displacement force also enables the core halves to be displaced in the direction of the coil axis without a reset or when the displacement force decreases Springback occurs, which would distort the adjustment.
  • each core half is attached independently of the other to the brackets by gluing or cold welding, with the result that the brackets in the finished transformer also function as a spacer between the two core halves.
  • the springs are to be formed by profile legs of the bracket profiles, the spring forces of profile legs assigned to one another being directed towards or away from each other. If it is, for example, a transformer with E- or M-Rers, the legs of which have essentially rectangular cross-sections, then the brackets can have a U-shaped profile which covers the one or more legs, the spring forces of the U-legs toward one another are directed. For slotted shell cores, bracket profiles will be used, the profile legs of which engage in the slot and spring apart.
  • brackets themselves as springs and to connect them to one another at one end via a bracket support.
  • This version is particularly suitable for transformers with unslit shell structures, the spring forces of the brackets being directed towards the coil axis.
  • a proposal of the invention is that the profiles of the bracket on their sides facing the core halves have projections or ribs directed transversely to the coil axis.
  • the profiles of the stirrups consequently lie with the projections or ribs on the core halves and, moreover, form a narrow gap into which the adhesive can be introduced from the end of the stirrups.
  • the gaps are preferably dimensioned such that the adhesive flows into the gap under the action of capillary forces. The amount of adhesive can then be measured accordingly.
  • the ribs can, for example, not be resilient tabs bent from the profile or from the profile legs.
  • brackets made of a non-magnetizable material in particular aluminum or brass or also plastic, because otherwise the brackets themselves will additionally change the characteristic values of the transformer.
  • the adhesive can be a plastic weaver, both a one-component adhesive and a two-component weaver. This does not exclude that magnetizable materials can also be used.
  • the transformer shown has two core halves 1, 2, which are sintered E-codes, and a coil former 3 with connecting pins 4.
  • the respective outer, opposite Rernschenkei 5, 6 and 7, 8 of the two Rern halves 1, 2nd are held clamped in U-shaped brackets 9 and 10 respectively.
  • the U-legs 11, 12 of each bracket 9 and 10 are set so that they can be pushed onto the Rern legs 5, 6 and 7, 8, the respective spring forces acting perpendicular to the coil axis.
  • Embossed ribs 13 are located on the inside of the U-legs 11, 12, so that a gap 14 remains between the inside of each U-leg 11 and 12 and the associated outside of the Rern legs 5-8.
  • the ribs 13 are arranged so that each Rern leg 5-8 on two ribs 13 of each U-leg 11, 12th is supported.
  • the core halves 1, 2 and the bobbin 3 are first loosely preassembled and then the brackets 9, 10 are pushed onto the mutually associated Rern legs 5, 6 and 7, 8 so that a relatively large distance 15 between the associated ends the core leg 5, 6 or 7, 8 remains. Then the transformer prepared in this way is connected via connection pins 4 to a suitable measuring device with which, for example, the inductance can be measured. Then the two Rern halves 1, 2 are moved towards one another in the direction of the coil axis until the measuring device displays the desired value.
  • the movement of the core halves 1, 2 takes place against the action of the frictional forces acting on them, generated by the spring force of the profile legs 11, 12, which, however, cannot influence a set distance 15, since they are directed perpendicular to the coil axis.
  • a possibly metered, small amount of adhesive is introduced into the gap 14, which adhesive is distributed therein under the action of Rapillary forces. It is sufficient if the gap is filled with adhesive up to approximately the next rib 13.
  • the adhesive can be a one-component adhesive or a two-component adhesive. If the adhesive shrinks during curing, the set distance 15 is not influenced or changed, because the shrinkage stresses of the adhesive also act perpendicular to the coil axis.
  • the characteristic value (s) of the transformer set in this way can consequently no longer change.
  • FIGS 3-5 show the bracket 9 with further details.
  • FIGS. 6-8 Another embodiment of a bracket 9 is shown in FIGS. 6-8, in which the ribs 13 are formed by angled tabs 16, which are produced by partially separating the U-legs 11, 12 from the associated U-web of the bracket 9.
  • the brackets 9, 10 are connected to one another at one end via a bracket support 17.
  • the bracket support 17 also has a U-profile.
  • the brackets 9, 10 are resiliently connected to the bracket support 17 in such a way that their resilient forces are directed towards one another.
  • the U-legs of the stirrups 9, 10 can develop their own spring forces, as in the embodiment according to FIGS. 3-5.
  • the core halves 1, 2 of the transformer shown in FIG. 1 are held with the frame-like stirrup according to FIGS. 9 and 10 , then the spring forces of the brackets 9, 10 also act perpendicular to the coil axis, so that a set distance 15 of the core halves 1, 2 is not affected by these spring forces.
  • FIGS. 11 and 12 The embodiment shown in FIGS. 11 and 12 is particularly suitable for transformers with shell names.
  • the brackets 9, 10 each have a circular section-shaped profile, the radius of which is adapted to the radius of the shell core. Via the bracket support 17, the two brackets 9, 10 are resiliently connected to one another in such a way that their spring forces act radially on the shell core.
  • a transformer with a shell code is set as described above.
  • the inner sides of the stirrups 9, 10 can also be provided with ribs, not shown, in order to form defined gaps between the inner sides of the stirrups 9, 10 and the associated outer sides of the core halves.
  • the profile legs 12 are formed by cut-out and angled tabs, while the profile legs 11 are smooth. This has the advantage that the core halves 1 and 2 are pressed by the resilient profile legs 12 against the smooth profile legs 11 and are therefore better guided during adjustment.
  • the brackets 9 shown in FIGS. 13-15 have a protruding plug pin 18 on one side.
  • Fig. 16 shows that the transformer shown is immediately mounted and adjusted on a circuit board 19.
  • brackets 9 and 10 are clamped onto the two opposite sides of the lower core half 2 and the coil former (not shown) is placed on the core half 2.
  • This unit is placed on the circuit board 19 in such a way that both the connecting pins 4 of the coil former and the plug pins 18 of the brackets 9 and 10, respectively, pass through openings in the circuit board 19.
  • Pins 4 and plug 18 are then fixed to the circuit board 19 by soldering. So that the lower core half 2, the bobbin and the bracket 9 and 10 are attached to the circuit board 19. Additional gluing or cold welding is not necessary.
  • the above core half 1 is inserted into the bracket and, as described above, the transformer is adjusted.
  • the circuit still present on the printed circuit board 19 can also be included.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Details Of Television Scanning (AREA)

Claims (11)

1) Procédé pour le montage et l'ajustement d'un transformateur en particulier pour appareils auxiliaires de lampes luminescentes à gaz ou similaires, muni d'un noyau divisé et d'un corps de bobine (3), dans lequel on bloque les moitiés de noyau (1, 2) assemblées au corps de bobine (3) entre des ailes élastiques de profil (11, 12) d'étriers (9, 10) s'étendant dans la direction de l'axe de la bobine, la force élastique des ailes de profil étant dirigée vers l'axe de la bobine, moitiés de noyau (1, 2) sont situées avec espacement mutuel entre les élastiques de profil (11, 12), en ce que l'on déplace alors relativement les moitiés de noyau (1,2) dans la direction de l'axe de la bobine, en surmontant les forces de frottement dues à la force élastique qui agissent sur elles ainsi qu'en contrôlant un instrument de mesure relié au corps de bobine (3), jusqu'à ce que l'instrument de mesure indique la valeur désirée, et en ce qu'ensuite, on soude à froid ou on colle les moitiés de noyau (1, 2) avec les étriers (9, 10).
2) Procédé selon la revendication 1, caractérisé par l'utilisation d'étriers profilés (9, 10) munis d'ailes de profil pratiquement en U (11, 12), dont les forces élastiques sont dirigées l'une vers l'autre ou à l'opposé l'une de l'autre.
3) Procédé selon l'une des revendications 1 et 2, caractérisé par l'utilisation d'étriers (9, 10) qui sont reliés entre eux à une extrémité par l'intermédiaire d'un support d'étriers (17).
4) Procédé selon l'une des revendications 1 à 3, caractérisé par l'utilisation d'étriers (9, 10) qui présentent, à leurs côtés tournés vers les moitiés de noyau (1,2), des saillies ou des nervures (13) dirigées transversalement à l'axe de la bobine.
5) Procédé selon la revendication 4, caractérisé par l'utilisation d'étriers (9, 10) sur lesquels au moins une nervure (13) est formée par des pattes élastiques (16) recourbées par rapport au profilé ou aux ailes de profil (11, 12).
6) Procédé selon l'une des revendications 1 à 5, caractérisé en ce que l'on remplit d'adhésif l'espacement (14) entre l'extrémité ouverte des étriers (9, 10) et les saillies ou nervures (13).
7) Procédé selon l'une des revendications 1 à 6, caractérisé par l'utilisation d'étriers (9, 10) en matière non magnétisable.
8) Procédé selon la revendication 7, caractérisé par l'utilisation d'étriers (9, 10) en aluminium, en cuivre, en bronze à ressort ou en laiton.
9) Procédé selon la revendication 7, caractérisé par l'utilisation d'étriers (9, 10) en matière synthétique.
10) Procédé selon l'une des revendications 1 à 9, caractérisé par l'utilisation d'un adhésif électriquement neutre comme agent d'accrochage.
11) Procédé selon l'une des revendications 1 à 9, avec utilisation d'étriers qui présentent au moins d'un côté une broche d'insertion en saillie, caractérisé en ce que l'on pose le corps de bobine (3), avec une moitié de noyau (2) et des étriers (9, 10) bloqués dessus, sur une plaque conductrice (19), en ce que l'on brase les broches de connection (4) du corps de bobine (3) et les broches d'insertion (18) des étriers (9, 10) sur la plaque conductrice (19) et en ce qu'alors on introduit la deuxième moitié du noyau (1) dans les étriers (9, 10) jusqu'à ce que le transformateur soit ajusté.
EP82106525A 1981-07-30 1982-07-20 Procédé pour le montage et le réglage d'un transformateur Expired EP0072451B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106525T ATE18315T1 (de) 1981-07-30 1982-07-20 Verfahren zum montieren und justieren eines transformators.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3130049A DE3130049C2 (de) 1981-07-30 1981-07-30 Verfahren zum Montieren und Justieren eines Transformators
DE3130049 1981-07-30

Publications (2)

Publication Number Publication Date
EP0072451A1 EP0072451A1 (fr) 1983-02-23
EP0072451B1 true EP0072451B1 (fr) 1986-02-26

Family

ID=6138078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106525A Expired EP0072451B1 (fr) 1981-07-30 1982-07-20 Procédé pour le montage et le réglage d'un transformateur

Country Status (3)

Country Link
EP (1) EP0072451B1 (fr)
AT (1) ATE18315T1 (fr)
DE (2) DE3130049C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737854A1 (de) * 1987-11-05 1989-05-24 Siemens Ag Verfahren zum montieren und justieren eines transformators

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978851A1 (fr) * 1994-11-04 2000-02-09 Matsushita Electric Industrial Co., Ltd. Filtre de ligne
EP0715323A1 (fr) * 1994-12-01 1996-06-05 Vlt Corporation Réglage de valeur d'inductance de composants magnétiques
DE19638954C2 (de) * 1996-09-12 1999-08-12 Siemens Ag Transformator oder Drossel sowie Verfahren zum Herstellen eines Transformators oder einer Drossel
US6392521B1 (en) * 2000-10-12 2002-05-21 Clinton Instrument Company Variable inductance transformer with electronic control
CN113178314B (zh) * 2021-05-13 2023-05-16 长兴超能科技有限公司 一种自动控制电感量的电感器及其控制方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869364A (en) * 1932-01-06 1932-08-02 Union Switch & Signal Co Reactor
US2494350A (en) * 1948-01-20 1950-01-10 Gen Electric Core clamp
US2574417A (en) * 1949-05-28 1951-11-06 Gen Electric Clamp improvement
DE959033C (de) * 1952-05-16 1957-02-28 Gen Electric Drosselspule mit einem Mantelkern
US3011140A (en) * 1960-08-01 1961-11-28 Gen Electric Coil insulating and lead anchoring means for transformers
US3668586A (en) * 1971-03-08 1972-06-06 Electronic Associates Transformer-inductor frame and kit
DE7225223U (de) * 1972-07-01 1972-10-05 Deutsche Tel.Werke U Kabelind Ag Halterung fuer magnetkerne und kernblechpakete
DE2446560C3 (de) * 1974-09-30 1978-05-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren und Vorrichtung zum Abgleichen von langgestreckten Drosseln durch Verkleinern ihres Luftspaltes
DE3031802A1 (de) * 1979-08-23 1981-03-26 Sanyo Electric Co., Ltd., Moriguchi, Osaka Ferritkern-transformator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737854A1 (de) * 1987-11-05 1989-05-24 Siemens Ag Verfahren zum montieren und justieren eines transformators

Also Published As

Publication number Publication date
ATE18315T1 (de) 1986-03-15
DE3130049A1 (de) 1983-02-17
DE3269374D1 (en) 1986-04-03
EP0072451A1 (fr) 1983-02-23
DE3130049C2 (de) 1984-03-22

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