EP0389892B1 - Transformator - Google Patents

Transformator Download PDF

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Publication number
EP0389892B1
EP0389892B1 EP90105024A EP90105024A EP0389892B1 EP 0389892 B1 EP0389892 B1 EP 0389892B1 EP 90105024 A EP90105024 A EP 90105024A EP 90105024 A EP90105024 A EP 90105024A EP 0389892 B1 EP0389892 B1 EP 0389892B1
Authority
EP
European Patent Office
Prior art keywords
core
transformer according
bar parts
parts
powder
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
EP90105024A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0389892A1 (de
Inventor
Friedel Twellsieck
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.)
Reo Boris Von Wolff & Cie GmbH
Original Assignee
Reo Boris Von Wolff & Cie GmbH
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 Reo Boris Von Wolff & Cie GmbH filed Critical Reo Boris Von Wolff & Cie GmbH
Publication of EP0389892A1 publication Critical patent/EP0389892A1/de
Application granted granted Critical
Publication of EP0389892B1 publication Critical patent/EP0389892B1/de
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
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards

Definitions

  • the invention relates to a transformer according to the preamble of patent claim 1.
  • Such a transformer according to the preamble of claim 1 is known from DE-A-31 10 427.
  • the electrically insulating web parts provided between the mutually facing sides of the primary winding and the secondary winding are formed in one piece as separating flange halves with insulating jacket parts which are placed on the core in such a way that the web parts and an insulating jacket surrounding the core are formed.
  • These insulating jacket parts, which have the separating flange halves, have a relatively complicated structure, so that high costs are incurred in their manufacture.
  • the attachment of these insulating jacket parts to the core is complex.
  • a toroidal choke emerges, in which web parts in the form of U-parts are located between the mutually facing sides of the primary and secondary windings are arranged, the legs of which have recesses for the cross section of the core.
  • These web parts which are designed to be relatively complex and cannot be easily attached to the core, can also move on the core, so that there is a risk that the primary winding and the secondary winding are at least partially displaced in the circumferential direction of the core, in particular in the region of their ends can.
  • the object of the present invention is to improve a transformer of the type mentioned at the outset in that its web parts can be easily mounted on the transformer core and that the windings are insulated particularly well both against the core and against one another.
  • the main advantage of the invention is that the web parts provided on the core are adjacent Always separate winding ends regardless of how many winding layers the windings comprise.
  • the adjacent winding ends can be very close to one another.
  • the web parts can be designed so that they have guide channels for the winding ends to be carried out in their area, so that these winding ends are also adequately fixed and insulated from one another.
  • the insulating coating of the core surface or of the winding surfaces of the windings located on the core, provided in the invention, can be carried out particularly simply by dusting the core and, if appropriate, the winding surfaces with a powder as the starting material for the coating, from which the coating is exposed to heat will be produced.
  • the thickness of the coating can be determined by the choice of temperature, the duration of heating and the amount of powder.
  • the arrangement of an insulating coating applied from a powdered plastic material on the surface of the core insulates the windings from the core and fixes the web parts reached the core, while when applying such a coating on the surfaces of the windings located on the core can preferably be achieved that a displacement of the windings is prevented by external forces, such as those caused when winding up insulating tapes.
  • the insulating coating melted from the powdered starting material penetrates into the free spaces between the individual adjacent turns of the windings during the melting process, so that the individual turns are fixed in their respective positions after the coating has hardened.
  • a major advantage of the invention is that the web parts are extremely easy to manufacture and mount on the core.
  • FIG. 1a shows a schematic representation of core 1 in the form of a toroidal core for producing an existing toroidal core transformer.
  • this core 1 is wound in a manner known per se from a sheet metal strip into an annular core package.
  • Two electrically insulating web parts 2 are preferably placed on the core 1 in the manner shown in FIG. 1b.
  • these web parts 2 divide the core 1 into two halves of the same size.
  • the web parts 2 consist in the manner shown in FIG. 1c of ring-shaped parts 3 whose openings are adapted to the shape of the core 1 and which have a slot 4 so that the ring-shaped part 3 can be bent up for placement on the core 1.
  • the annular parts 3 are preferably made of a rubber material.
  • FIG. 1c shows a rectangular web part 2, which is placed on a rectangular core 1.
  • Fig. 1d shows an annular Web part 2, which is placed on a core 1 with a circular cross section. 1e and 1f, the web parts 2 can also consist of U-shaped parts 3 ', the legs 3''of which are connected at one end by a transverse part 3''' such that between the legs 3 '' and the transverse part 3 '''is formed, the inner wall of which at least partially abuts the outer circumference of the core 1. According to the illustration in FIG.
  • FIG. 1f which shows a core 1 with a circular cross section
  • the legs 3 ′′ and the transverse part 3 ′′ ′′ lie approximately on one half of the circular cross section of the core 1.
  • Fig. 1e which shows a core 1 with a rectangular cross section
  • the legs 3 '' and the transverse part 3 ''' lie on three sides of the rectangular cross section of the core 1, at least the free end of a leg 3''one Can have nose 3 '''', which can overlap the free side of the rectangular core 1 for the purpose of attachment.
  • Such a lug 3 '''' can also be formed on at least one free end region of a leg 3 '' of the web part 2 of FIG.
  • the circular cross section of the core 1 is held between the interior of the web part 2 enclosed by the nose 3 ′′ ′′, the leg 3 ′′ and the transverse part 3 ′′.
  • the in 1e and 1f shown embodiments of the web parts 2 made of a suitable plastic material, which is designed so that the leg parts 3 '' can be spread apart for placing the web parts 2 on the core 1 and after mounting in the positions shown in FIG Compress 1e and 1f.
  • the web parts 2 can also have any other shape, it being only important that they are clamped on the circumference of the core 1 and that they enclose a substantial part of the outer circumference of the core 1.
  • the insulating coating is produced on the outer circumference of the core 1 in that the core 1 provided with the web parts 2 is dusted with a powder from which the coating is produced by the action of heat.
  • the powder is dusted in such a way that the entire surface of the core 1 is evenly provided with a dense powder layer. Then this powder layer is melted by heat treatment, the electrically insulating layer 5 being formed after curing.
  • the thickness thereof can be determined by a suitable choice of the temperature during the heat treatment, the duration of the treatment and the amount of material (FIG. 3).
  • a major advantage is that the web parts 2 are automatically fixed on the core 1 by the laterally adjacent layer 5 when the insulating layer 5 is produced. Since the material of the web parts 2, preferably the rubber material, is not itself heated under the action of heat, the insulating web parts 2 are not coated.
  • the core 1 can now be wound, so that the toroidal transformer shown in FIGS. 2 and 3 is formed, in which the primary winding 6 arranged on one half is separated by the bridge parts 2 from the secondary winding 7 arranged on the other half.
  • the ends 6 'and 6''of the primary winding and the ends 7' and 7 '' of the secondary winding are preferably guided by wire guides 8, which are located on opposite sides of the outer ends of the web parts 2.
  • the wire guides 8 are in the form of small tubes which are fastened to the web part 2 as shown in FIG. 4b or are made in one piece with the web part 2. It is also possible to provide the area of the outer end of the web part 2 in the manner shown in FIG.
  • a further electrically insulating layer 10 can be applied to the outside circumference of the primary winding 6 and the secondary winding 7 in order to insulate the primary winding 6 and / or the secondary winding 7.
  • This layer 10 is preferably produced in the same manner as has already been explained in connection with the insulating layer 5.
  • the material of the layer 10 penetrates into the free spaces between the turns of the primary winding 6 and the secondary winding 7 when the powder is heated and ensures that the turns are fixed during curing , so that they can no longer be moved by the action of external forces.
  • further fixing of the ends 6 ′, 6 ′′, 7 ′ and 7 ′′ which are led outwards is ensured (FIG. 2.3).
  • the insulating layer 5 and optionally the layer 10 are preferably produced from an epoxy resin powder.
  • tubes or bores of the wire guides 8 can also run in directions other than the tangential directions shown, for example radially.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Transformers For Measuring Instruments (AREA)
EP90105024A 1989-03-29 1990-03-16 Transformator Expired - Lifetime EP0389892B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910142 1989-03-29
DE3910142A DE3910142A1 (de) 1989-03-29 1989-03-29 Transformator

Publications (2)

Publication Number Publication Date
EP0389892A1 EP0389892A1 (de) 1990-10-03
EP0389892B1 true EP0389892B1 (de) 1993-12-15

Family

ID=6377377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105024A Expired - Lifetime EP0389892B1 (de) 1989-03-29 1990-03-16 Transformator

Country Status (3)

Country Link
EP (1) EP0389892B1 (enrdf_load_stackoverflow)
DD (1) DD293220A5 (enrdf_load_stackoverflow)
DE (2) DE3910142A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215403C2 (de) * 1991-05-16 2000-10-19 Mbt Holding Ag Zuerich Doppelkolbenpumpe zum Fördern von flüssigen Materialien, insbesondere von Beton oder Mörtel
DE4310056C2 (de) * 1993-03-27 1996-06-13 Vacuumschmelze Gmbh Verfahren zur Herstellung eines induktiven Bauelementes
DE102004008961B4 (de) * 2004-02-24 2005-12-29 Epcos Ag Spulenkörper für geschlossenen magnetischen Kern und daraus hergestellte Entstördrossel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1824760U (de) * 1960-05-20 1961-01-12 Siemens Ag Trennwand der kammerwicklung bei ringkerndrosseln.
DE3110427A1 (de) * 1981-03-18 1982-11-25 Sachße, Brigitte, 8500 Nürnberg Ringkern-transformator-uebertrager-drossel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1048973B (de) * 1957-04-11 1959-01-22 Horst Becker Schutzsteckdose fuer elektrische Rasierapparate
US4777465A (en) * 1986-04-28 1988-10-11 Burr-Brown Corporation Square toroid transformer for hybrid integrated circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1824760U (de) * 1960-05-20 1961-01-12 Siemens Ag Trennwand der kammerwicklung bei ringkerndrosseln.
DE3110427A1 (de) * 1981-03-18 1982-11-25 Sachße, Brigitte, 8500 Nürnberg Ringkern-transformator-uebertrager-drossel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Elektrie (1962), Heft 4, S.31-32 *

Also Published As

Publication number Publication date
EP0389892A1 (de) 1990-10-03
DE59003827D1 (de) 1994-01-27
DE3910142A1 (de) 1990-10-04
DD293220A5 (de) 1991-08-22
DE3910142C2 (enrdf_load_stackoverflow) 1992-12-10

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