EP0510149A1 - Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite. - Google Patents

Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite.

Info

Publication number
EP0510149A1
EP0510149A1 EP91919460A EP91919460A EP0510149A1 EP 0510149 A1 EP0510149 A1 EP 0510149A1 EP 91919460 A EP91919460 A EP 91919460A EP 91919460 A EP91919460 A EP 91919460A EP 0510149 A1 EP0510149 A1 EP 0510149A1
Authority
EP
European Patent Office
Prior art keywords
shells
shaped
partial
bobbin
coil former
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
EP91919460A
Other languages
German (de)
English (en)
Other versions
EP0510149B1 (fr
Inventor
Guido Aichner
Herbert Profunser
Carsten Ruchholtz
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.)
Zumtobel AG
Original Assignee
Zumtobel 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 Zumtobel AG filed Critical Zumtobel AG
Publication of EP0510149A1 publication Critical patent/EP0510149A1/fr
Application granted granted Critical
Publication of EP0510149B1 publication Critical patent/EP0510149B1/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
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/025—Coils wound on non-magnetic supports, e.g. formers wound on coaxial arrangement of two or more formers

Definitions

  • Coil formers especially for small and safety transformers
  • the invention relates to a coil former, in particular for small and safety transformers according to the preamble of claim 1.
  • the European standard DIN VDE 0551 part 1 / 09.89 for isolating and safety transformers prescribes for a certain transformer output that coil formers of the type described above, i. H. those that are made from plastic by injection molding must have a wall thickness of at least 1 mm for safety reasons.
  • coil formers of the type described above i. H. those that are made from plastic by injection molding must have a wall thickness of at least 1 mm for safety reasons.
  • a wall thickness is undesirable, since it runs counter to the existing requirement for size minimization.
  • the above-mentioned standard allows the wall thickness of the coil body to be made less than 1 mm, even if the power is the same, if the coil body consists of at least three layers or layers and fulfills the required insulating properties.
  • the standard recommends, for example, to manufacture a bobbin by winding a film tape that is feathered or perforated on its two longitudinal edges in four layers on a winding core in such a way that the feathered or perforated edge areas bend upwards, which results in a U-profile in cross section with side edge flanges for the bobbin. Due to the edge incisions (feathering) or perforation in the edge area, however, there are air gaps in every layer, ie places of reduced insulation. These are the reason why - how Tests have shown - coil bodies produced in this way sometimes do not meet the required insulating properties.
  • the invention has for its object to provide a coil body according to standards, which has a substantially smaller wall thickness than 1 mm and ensures perfect insulation values, especially in the area of the U-legs.
  • the object is achieved by the feature specified in the characterizing part of claim 1.
  • the bobbin according to the invention consists of several shells, the standard is satisfied.
  • the wall thickness of the shells can be chosen so that the total thickness of the shells lying one above the other is considerably less than 1 mm.
  • the dimensional stability on the one hand and the plastic deformability on the other hand ensure that the shells can be joined together to form the annular coil former.
  • Shells of the same type are preferably used for a coil former. However, this is not absolutely necessary.
  • An embodiment of the coil former according to the invention can consist in that, like the coil former known from DE-A 22 08 457, it is composed of two C-shaped partial bodies, but here each partial body consists of corresponding C-shaped partial shells.
  • Another possibility can be that all shells are ring-shaped so that they have only one interruption.
  • Another expedient development can consist in that a metal foil, preferably a copper foil, is inserted between at least two shells. In this way, electrical shielding of the windings lying one above the other can be ensured.
  • the shells can be designed in such a way that the ends formed by the interruption overlap when the coil former is assembled.
  • the shells or partial shells can consist of thermoplastic material, which enables production by plastic deformation.
  • annular shells when using annular shells, these can be opened one after the other by plastic bending at the interruptions and pushed over one another. This can be done in such a way that the interruptions all come to lie at the same point on the coil former or alternately at opposite points.
  • a film material with a wall thickness of less than 100 ⁇ m, for. B. 80 microns are used, so that there is a very thin wall for the bobbin and therefore more space is available for the winding.
  • a three-layer coil former for example, a total wall thickness of less than 300 ⁇ m can be achieved.
  • This bobbin has the advantage over the bobbin produced by winding from foil tape that is recommended by the standard that gaps in the insulation are excluded.
  • FIG. 1 shows a transformer with two windings lying one on top of the other on bobbins
  • Figure 2 is a perspective view of the inner bobbin from Figure 1 with the winding thereon and an exploded view of the outer bobbin without winding;
  • Figure 3 shows a first embodiment of the bobbin according to the invention in side view;
  • Figure 4 shows a second embodiment of the bobbin according to the invention in side view.
  • FIG. 1 shows a transformer 1 with an iron core 2, a first winding 3 and a second winding 4.
  • the first winding 3 is wound on an inner coil former 5A, which encloses an opening 10 through which a leg 6 of the transformer core extends.
  • the second winding 4 is located on an outer coil body 5B, which is arranged on the first winding 3. With 7 the winding axis of the two windings 3, 4 is designated.
  • Figure 2 shows the inner coil body 5A with the winding 3 in a perspective view.
  • this inner coil former 5A is designed as described below in connection with the outer coil former 5B.
  • the outer coil body 5B consists of two partial bodies 5Ba and 5Bb.
  • the two partial bodies each consist of several partial shells, of which only two are shown in FIG. 2.
  • the partial shells 5Bal and 5Ba2 form the partial body 5Ba.
  • the partial shells 5Bbl and 5Bb2 form the partial body 5Bb.
  • Each of the partial shells consists of a thermoplastic deformable film with a U-shaped cross section, the web of the U-profile being designated 9 and the edge flanges 11.
  • the partial shells 5Bal and 5Ba2 are pushed on top of one another to form the partial body 5Ba.
  • the partial shells 5Bbl and 5Bb2 are pushed over one another to form the partial body 5Bb.
  • the two partial bodies 5Ba and 5Bb then become the formation of the outer bobbin 5B is pushed onto the inner bobbin 5A in such a way that the ends meeting one another overlap.
  • FIG. 3 shows a coil former 5 which is constructed in the same way as the coil former 5A and 5B in FIGS. 1 and 2.
  • the coil body 5 here consists of two C-shaped partial bodies 5a and 5b, which are set against one another at their ends 15, in such a way that they overlap in an overlap area Ü.
  • the part body 5a consists of three part-shells 5al, 5a2 and 5a3 arranged in a box shape.
  • the partial body 5b consists of three partial shells 5b 1, 5b2 and 5b3 arranged in a box shape.
  • Each of the partial shells in turn has a U-profile and consists of a thermoplastic deformable film.
  • the coil former 5 has two interruptions 18 as a result of the C-shaped partial bodies 5a, 5b placed against one another.
  • FIG. 4 shows a coil former 5C which has only one interruption 18. It consists of three annular shells 5cl, 5c2 and 5c3 arranged one above the other in layers or one inside the other like boxes.
  • Each of the shells has a U-profile in cross-section and consists of a thermoplastic plastic film.
  • the shells are inherently stable, but plastically deformable. In particular, they can be bent open by moving their ends 15 away from one another. In the shape opened in this way, they can be put over the other shells and nested. As can be seen from FIG. 4, the ends 15 of the shells are alternately plugged together and form an overlap area Ü.
  • a metal foil in particular a copper foil, can also be inserted between the shells or partial shells of all embodiments, in order thereby to provide a shield for the windings from other windings or from the iron core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Details Of Television Scanning (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Fuses (AREA)

Abstract

Pour constituer une armature de bobine (5C), en particulier pour petits transformateurs et transformateurs de sécurité, on superpose plusieurs coques (5c1, 5c2, 5c3) en matériau électriquement isolant. Chaque coque a une section en U. En outre, chaque coque est indéformable sans l'effet d'une force, mais élastiquement déformable sous l'effet d'une force. Les coques forment un anneau avec au moins une interruption (18). A l'endroit de l'interruption, les extrémités (15) se chevauchent.
EP91919460A 1990-11-14 1991-11-13 Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite Expired - Lifetime EP0510149B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4036275 1990-11-14
DE4036275A DE4036275A1 (de) 1990-11-14 1990-11-14 Ringfoermiger spulenkoerper fuer klein- und sicherheitstranformatoren und verfahren zu seiner herstellung
PCT/EP1991/002144 WO1992009092A1 (fr) 1990-11-14 1991-11-13 Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite

Publications (2)

Publication Number Publication Date
EP0510149A1 true EP0510149A1 (fr) 1992-10-28
EP0510149B1 EP0510149B1 (fr) 1996-01-31

Family

ID=6418259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91919460A Expired - Lifetime EP0510149B1 (fr) 1990-11-14 1991-11-13 Armature de bobine, en particulier pour petits transformateurs et transformateurs de securite

Country Status (7)

Country Link
EP (1) EP0510149B1 (fr)
JP (1) JPH05505910A (fr)
AT (1) ATE133811T1 (fr)
AU (1) AU650301B2 (fr)
DE (2) DE4036275A1 (fr)
ES (1) ES2084835T3 (fr)
WO (1) WO1992009092A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007334B4 (de) * 2005-02-17 2007-02-08 Siemens Ag Summenstromwandler zur allstromsensitiven Erfassung eines elektrischen Differenzstromes
US9985488B2 (en) 2011-07-22 2018-05-29 RWXT Nuclear Operations Group, Inc. Environmentally robust electromagnets and electric motors employing same for use in nuclear reactors
DE202013104681U1 (de) * 2013-10-16 2013-11-27 Vallon Gmbh Entmagnetisierungsspule
DE102014202531A1 (de) * 2014-02-12 2015-08-13 Siemens Aktiengesellschaft Hochspannungstransformatorvorrichtung mit einstellbarer Streuung, Wechselrichterschaltung mit einer Hochspannungstransformatorvorrichtung und Verwendung einer Hochspannungstransformatorvorrichtung
CN106252031B (zh) 2015-06-12 2020-08-04 松下知识产权经营株式会社 磁性器件及使用该磁性器件的功率变换装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB250261A (en) * 1925-04-02 1926-08-12 Gen Electric Improvements in or relating to electric transformers
US2167539A (en) * 1937-12-28 1939-07-25 Gen Electric Method of making flanged cylinders
US2723933A (en) * 1950-01-31 1955-11-15 Hans D Isenberg Method of making preformed insulation for high voltage transformer
GB739762A (en) * 1953-04-03 1955-11-02 Forges Ateliers Const Electr Improvements in high-tension transformer windings
DE2208457A1 (de) * 1972-02-23 1973-08-30 Loewe Opta Gmbh Wickelkoerper fuer transformatoren
GB1495783A (en) * 1975-02-10 1977-12-21 Stroemberg Oy Ab Voltage transformer
DE3107059A1 (de) * 1981-02-25 1982-09-09 Siemens AG, 1000 Berlin und 8000 München Elektrischer uebertrager

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9209092A1 *

Also Published As

Publication number Publication date
DE59107357D1 (de) 1996-03-14
JPH05505910A (ja) 1993-08-26
ES2084835T3 (es) 1996-05-16
WO1992009092A1 (fr) 1992-05-29
ATE133811T1 (de) 1996-02-15
AU650301B2 (en) 1994-06-16
DE4036275A1 (de) 1992-05-21
EP0510149B1 (fr) 1996-01-31
AU8862291A (en) 1992-06-11

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