EP0072451A1 - 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
EP0072451A1
EP0072451A1 EP82106525A EP82106525A EP0072451A1 EP 0072451 A1 EP0072451 A1 EP 0072451A1 EP 82106525 A EP82106525 A EP 82106525A EP 82106525 A EP82106525 A EP 82106525A EP 0072451 A1 EP0072451 A1 EP 0072451A1
Authority
EP
European Patent Office
Prior art keywords
brackets
core
core halves
transformer
transformer according
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
EP82106525A
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German (de)
English (en)
Other versions
EP0072451B1 (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
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Individual
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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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    • 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 transformer, in particular for ballasts for gas discharge lamps or the like, with a split core and a coil former, the core halves being held together with springs and brackets while leaving a distance between the mutually associated ends of the core halves and which extend in the direction of the coil axis Brackets have a profile which is essentially adapted to the profile of the parts of the core halves projecting beyond the coil former.
  • Such transformers which are also called stray field transformers, are used e.g. in ballasts for fluorescent tubes used in the leisure sector, e.g. on boats and in caravans. With these transformers, the existing low voltage is transformed up to a voltage suitable for the fluorescent tubes. At the same time, 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 imprecisely, because the core halves themselves have considerable manufacturing tolerances that relate to the inductor Effectiveness affect and also the inductance is very significantly affected by very small changes in the distance between 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, the operating parameters of which can be set mechanically, for example 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 on the order of 1 - 2 cm or less, such facilities can no longer be accommodated.
  • the object of the invention is therefore to provide a transformer of the type described above, the parameters of which can be set reliably and permanently in a simple manner.
  • the invention also relates to a method for adjusting such a transformer, in which the core halves joined with the coil former are clamped to the brackets and adjusted to the desired distance. This is done by connecting the bobbin to a measuring device before setting the distance and then moving the two core halves against each other, overcoming the spring-force-related frictional forces, until the measuring device displays the desired value, and that the core halves then subsequently with the Ironing can be glued or cold welded.
  • the characteristic values of very small transformers can be set with extreme accuracy, i.e. with deviations that are below 1% of the desired value. This applies both to transformers with E or M cores and to transformers with shell cores, regardless of whether the cores are so-called sintered cores or made up of laminated cores.
  • 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 one another. If it is, for example, a transformer with an E or M core, the legs of which have essentially rectangular cross sections, then the brackets can have a U-shaped profile which covers the leg or legs, the spring forces of the U legs toward one another are directed. With 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 cores, whereby the spring forces of the brackets are directed towards the coil axis.
  • the spring forces are sufficient to maintain the set distance between the two core halves until the adhesive introduced between the bracket and the core halves has hardened.
  • one proposal of the invention is that the profiles of the stirrups have projections on their sides facing the core halves 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, be resilient tabs bent out of the profile or out of 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 adhesive, both a one-component adhesive and a two-component adhesive. This does not exclude that magnetizable materials can also be used.
  • the transformer shown has two core halves 1, 2, which are sintered E cores, and a coil former 3 with connecting pins 4.
  • the respective outer, opposite core legs 5, 6 and 7, 8 of the two core halves 1, 2 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 core 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 core legs 5-8. In the illustrated embodiment, the ribs 13 are arranged so that each core leg 5-8 is supported on two ribs 13 of each U-leg 11, 12.
  • the core halves 1, 2 and the coil former 3 are first loosely preassembled and then the brackets 9 , 10 pushed onto the mutually assigned core legs 5, 6 or 7, 8 in such a way that a relatively large distance 15 remains between the assigned ends of the core legs 5, 6 or 7, 8. 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 core halves 1, 2 are moved towards each other 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 perpendicular to the coils axis are directed.
  • a possibly metered, small amount of adhesive is introduced into the gap 14, which is distributed therein under the action of capillary 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 or values 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 with the frame-like stirrup 9 and 10 held clamped then the spring forces of the bracket 9, 10 also act perpendicular to the coil axis, so that a set distance 15 of the core halves 1, 2 is not influenced by these spring forces.
  • FIGS. 11 and 12 The embodiment shown in FIGS. 11 and 12 is particularly suitable for transformers with shell cores.
  • 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 core 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.
  • two brackets 9 and 10 are clamped onto the two opposite sides of the lower core half and the bobbin, not shown, is placed on the core half 2.
  • This assembly is then 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 are associated with 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 upper 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)
  • Details Of Television Scanning (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
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 true EP0072451A1 (fr) 1983-02-23
EP0072451B1 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715323A1 (fr) * 1994-12-01 1996-06-05 Vlt Corporation Réglage de valeur d'inductance de composants magnétiques
EP0829888A2 (fr) * 1996-09-12 1998-03-18 Siemens Aktiengesellschaft Transformateur ou bobine d'inductance et procédé pour la fabrication d'un tel transformateur ou d'une telle bobine d'inductance
EP0978851A1 (fr) * 1994-11-04 2000-02-09 Matsushita Electric Industrial Co., Ltd. Filtre de ligne
DE10148040B4 (de) * 2000-10-12 2006-01-12 Clinton Instrument Co., Clinton Regelbarer Induktionsformator mit elektronischer Steuerung
CN113178314A (zh) * 2021-05-13 2021-07-27 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

Families Citing this family (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

Citations (5)

* 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
DE959033C (de) * 1952-05-16 1957-02-28 Gen Electric Drosselspule mit einem Mantelkern
GB917802A (en) * 1960-08-01 1963-02-06 Gen Electric Improvements in coil insulating for transformers
US3668586A (en) * 1971-03-08 1972-06-06 Electronic Associates Transformer-inductor frame and kit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574417A (en) * 1949-05-28 1951-11-06 Gen Electric Clamp improvement
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
US4334206A (en) * 1979-08-23 1982-06-08 Sanyo Electric Co., Ltd. Ferrite core type transformer

Patent Citations (5)

* 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
DE959033C (de) * 1952-05-16 1957-02-28 Gen Electric Drosselspule mit einem Mantelkern
GB917802A (en) * 1960-08-01 1963-02-06 Gen Electric Improvements in coil insulating for transformers
US3668586A (en) * 1971-03-08 1972-06-06 Electronic Associates Transformer-inductor frame and kit

Cited By (6)

* 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
EP0829888A2 (fr) * 1996-09-12 1998-03-18 Siemens Aktiengesellschaft Transformateur ou bobine d'inductance et procédé pour la fabrication d'un tel transformateur ou d'une telle bobine d'inductance
EP0829888A3 (fr) * 1996-09-12 1998-04-29 Siemens Aktiengesellschaft Transformateur ou bobine d'inductance et procédé pour la fabrication d'un tel transformateur ou d'une telle bobine d'inductance
DE10148040B4 (de) * 2000-10-12 2006-01-12 Clinton Instrument Co., Clinton Regelbarer Induktionsformator mit elektronischer Steuerung
CN113178314A (zh) * 2021-05-13 2021-07-27 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

Also Published As

Publication number Publication date
DE3130049C2 (de) 1984-03-22
EP0072451B1 (fr) 1986-02-26
DE3269374D1 (en) 1986-04-03
ATE18315T1 (de) 1986-03-15
DE3130049A1 (de) 1983-02-17

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