EP0767473A1 - Bobine et procédé de sa fabrication pour transformateur - Google Patents

Bobine et procédé de sa fabrication pour transformateur Download PDF

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Publication number
EP0767473A1
EP0767473A1 EP96114762A EP96114762A EP0767473A1 EP 0767473 A1 EP0767473 A1 EP 0767473A1 EP 96114762 A EP96114762 A EP 96114762A EP 96114762 A EP96114762 A EP 96114762A EP 0767473 A1 EP0767473 A1 EP 0767473A1
Authority
EP
European Patent Office
Prior art keywords
layer
conductive material
coil
filler
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.)
Withdrawn
Application number
EP96114762A
Other languages
German (de)
English (en)
Inventor
Bernhard Artelsmair
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.)
Fronius Schweissmaschinen KG Austria
Original Assignee
Fronius Schweissmaschinen KG Austria
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 Fronius Schweissmaschinen KG Austria filed Critical Fronius Schweissmaschinen KG Austria
Priority to DE29623798U priority Critical patent/DE29623798U1/de
Publication of EP0767473A1 publication Critical patent/EP0767473A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/041—Printed circuit coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating

Definitions

  • the invention relates to a method for producing a coil former, as described in the preamble of claim 1.
  • a coil in the form of a planar winding for a transformer for the transmission of current and voltage is already known.
  • the coil is formed from a printed circuit board, the printed circuit board consisting of a carrier layer and a conductive material with a predetermined cross section.
  • the shape of the coil or the conductive material is etched or milled out of the printed circuit board and then coated with an insulating material, in particular an insulating varnish, in order to prevent possible short circuits of the conductive material with the iron core of the transformer.
  • the disadvantage here is that the cross section of the conductive material for forming the coil does not meet the corresponding transmission requirements of the transformer, e.g. Current and / or voltage, can be adapted, but that the adaptation of the cross section of the conductive material must be carried out by a corresponding parallel connection and / or series connection of several coils.
  • the present invention has for its object to provide a coil in which it can be found in the manufacture of the coil without a bobbin and an adjustment of the cross section of the conductive material to the corresponding transmission power is made possible.
  • a coil former can be dispensed with in the manufacture of the coil in the form of a sandwich component, since the conductive material, for example a copper foil of the appropriate shape, is embedded between two baking foils and thus a corresponding stiffness and insulation is provided and costs for an additional coil former can be saved.
  • the cross section of the conductive material can be adapted to the transmission requirements of the transformer by the separate production of the conductive material and thus the overall height of the transformer can be reduced or manufacturing costs can be saved.
  • the invention also includes a coil former as described in the preamble of claim 7.
  • This bobbin is characterized by the features of claim 7. It is advantageous here that the cross-section of the conductive material can be adapted to the required power by embedding the conductive material.
  • transformer 1 to 3 show the transformer 1 according to the invention for transmitting current and voltage, the transformer 1 according to the invention being designed, for example, in the form of a planar transformer.
  • the transformer 1 consists of two cores, in particular of ferrite or iron cores 2, 3, which are, for example, E-shaped, i.e. that the iron cores 2, 3 each have a base 4, 5 and legs 6 to 11.
  • the iron core 3 is placed, for example, with a bottom 12 on a solid object, whereby the legs 6 to 8 of the iron core 3 protrude from the opposite side of the bottom 12.
  • the iron core 2 with its legs 9 to 11 is now positioned on the legs 6 to 8, as a result of which the base area 5 of the iron core 2 forms the end.
  • a protective fleece 13 for example, is placed in the iron core 3 between the two base surfaces 4, 5 of the iron cores 2, 3 and then a primary coil 14 designed as a planar winding is placed in the iron core 3 on the protective fleece 13 inserted, the primary coil 14 having a recess 15 in the central region.
  • the recess 15 corresponds to the shape of the leg 7 or 10 of the iron core 3 or 2, whereby the primary coil 14 can be plugged onto the leg 7.
  • Two secondary coils 16, 17 designed as a planar winding are now placed on the primary coil 14.
  • a protective fleece 13 can in turn be placed on the leg 10 in the iron core 2. It is also possible that, for example, the legs 9 to 11 have guide pins and the legs 6 to 8 of the iron core 3 contain the corresponding counter-recesses. This would have the advantage that an exact positioning of the two iron cores 2, 3 relative to one another is made possible when constructing the transformer 1 according to the invention.
  • the individual coils in particular the primary coil 14 and the secondary coils 16, 17, are constructed as planar windings, it also being possible to build them up from wire coils.
  • the primary coil 14 is formed, for example, from a conductive material, in particular a copper foil 18, which is surrounded by a filler layer 19, in particular a baking foil.
  • the secondary coil 16, 17 can be designed the same as the primary coil 14.
  • a printed circuit board is arranged between the primary coils 14 and the secondary coils 16 and 17, so that the primary coil 14 can be connected directly to the printed circuit board and then the secondary coil 16, 17 is also connected to the printed circuit board on the opposite side of the printed circuit board can be, so that a compact design is achieved.
  • planar winding of a coil which is part of the prior art, is that the planar windings have so far been applied or etched out on a printed circuit board by appropriate processing of the printed circuit board and then the printed circuit board is coated with an insulating material.
  • the disadvantage here is that due to the thickness of the circuit board and by applying an insulating layer, the transformer must have an appropriate size through the thickness of the coil. Due to the corresponding thickness of the individual coils, the iron cores 2, 3 must be oversized so that a corresponding distance is formed between the legs 6 to 11 of the individual iron cores 2, 3, so that the desired number of coils can be accommodated.
  • FIG. 4 and 5 show the manufacturing method of a coil former 20 as shown in FIG. 3, wherein the coil former 20 can be used both as a primary coil 14 and as a secondary coil 16 and 17, respectively.
  • a filler layer 21 which is part of the prior art, is placed, for example, in a pressing device 22.
  • the filler layer 21 is formed from a carrier layer 23 and a composite layer 24.
  • the composite layer 24 is formed, for example, from a resin or thermoplastic or thermosetting plastic, which consist of powder, pastes or granules, the resin applied, for example, being provided with a hardener in order to provide a certain stiffness for the coil former when the resin-hardener mixture reacts To reach 20.
  • the carrier layer 23 can be formed from fabric, fleece or foils, to which the resin or the thermoplastic or thermosetting plastic is subsequently applied.
  • the copper foil 18 is placed on the composite layer 24 of the filler layer 21.
  • a further filler layer 26 is then placed on the copper foil 18 in the pressing device 22.
  • the filler layer 26 is in turn formed from a carrier layer 27 and a composite layer 28. It should be noted that the filler layer 26 with the composite layer 28 to the copper foil 18 is placed in the pressing device 22.
  • the pressing device 22 is formed from a movable part 29 and from side parts 30, 31 and a support part 32.
  • the pressing device 22 forms with the side parts 30, 31 and the support part 32 a U-shaped configuration, whereby the individual layers of the coil body 20 can be inserted into the space between the pressing device 22 when the movable part 29 is lifted off.
  • the movable part 29, the side parts 30, 31 and the support part 32 have a heating device 33.
  • the movable part 29 moves in the direction of an arrow 34, as a result of which the sandwich structure of the coil former 20 is pressed together.
  • the composite layers 24 and 28 are heated so that they change into a liquid or plasticized state.
  • a single composite layer 35 is now produced from the two composite layers 24 and 28 and thus the copper foil 18 is embedded in this composite layer 35, i.e.
  • the movable part 29 can be moved against the direction of the arrow 34 and then the coil body 20 can still react or be removed from the pressing device 22 after the composite layer 35 has cooled. Due to the arrangement of the filler layers 21 and 26 in the form of a sandwich component, a composite filler layer is now produced by pressing and heating the coil body 20, ie the coil body 20 or the primary coil 14 or the secondary coils 16, 17 are made from a single, Composite filler layer with the carrier layers 23 and 27 and a single composite layer 35 is formed.
  • a correspondingly thick copper foil 18 can be used in accordance with the power required, so that a high power or a high current flow results in a Copper foil 18 with a thickness of, for example, 2 mm or, at lower power, a copper foil 18 with a thickness of, for example, 0.1 mm can be inserted into the pressing device 22 and then a compact bobbin 20 is produced due to the pressing process or the heating of the coil body 20 then into the iron cores 2, 3 of the transformer 1 can be inserted. It is advantageous that the number of coils to be connected in parallel, in particular the primary coils 14 and / or the secondary coils 16, 17, can be reduced by adapting the cross section of the copper foil 18 to the corresponding power of the transformer 1.
  • any conductive material can be used to produce the coil former 20 in the form of a sandwich component. So it is possible, for example, that a corresponding coil shape is formed from a copper wire, which is then again inserted between two filler layers 21, 26 and integrated into a single filler layer by pressure or heating, so that in turn a uniform design or compact coil for the transformer 1 can be manufactured.
  • Another advantage is that in the manufacture of the coil former 20 for the transformer 1, no additional coil former 20 or carrier layers are required, since a certain stiffness of the coil former 20 is achieved by the construction of the coil former 20 in the form of a sandwich component and thus costs can be saved in the manufacture of the bobbin 20.
  • any other type of pressing device 22 e.g. a punching device can be used. It is also possible that, for example, the recess 15 for the leg 7 or 10 can only be punched out after a pressing process in the coil, or that a punching device for the recess 15 is already integrated in the pressing device 22.
  • projections are arranged on the surface 25 of the support part 32 and on the surface of the movable part opposite the surface.
  • the arrangement of the projections ensures that certain areas of the coil body 20 are pressed more than the remaining areas. It is advantageous that when the projections are arranged in the edge region of the filler layers 21, 26 and the conductive material, in particular the copper foil 18, homogeneous pressing is achieved or the cavities around the conductive material can be better compensated for.
  • FIGS. 6 and 7 Another embodiment of the bobbin 20 is described in FIGS. 6 and 7, the same reference numerals being used for the same parts.
  • the structure of the coil former 20 is again shown by a sandwich component.
  • the conductive material in particular the copper foil 18, is placed on the filler layer 21.
  • a filler layer 36 is then placed on the copper foil 18.
  • the filler layer 36 consists of a carrier layer 37 and two composite layers 38, 39 arranged on the carrier layer 37.
  • the composite layers 38, 39 are applied to the carrier layer 37 by coating or impregnation.
  • the composite layer 38 rests on the copper foil 18.
  • the further composite layer 39 is arranged on the opposite side of the carrier layer 37.
  • a further conductive material in particular a copper foil 40, can now be placed on the composite layer 39.
  • the filler layer 26 is now placed on the copper foil 40, so that the carrier layer 27 of the filler layer 26 and the carrier layer 23 of the filler layer 21 form the end of the coil former 20.
  • the composite layers 24, 28, 38, 39 are cured in the pressing device 22, as described in FIGS. 4 and 5, the composite layers 24, 28, 38, 39 each form a single composite layer 41, 42, as shown in FIG Fig. 7 can be seen.
  • the copper foils 18, 40 are completely enclosed in the composite layers 41, 42, so that a sandwich-like structure of the coil former 20 with corresponding rigidity is achieved.
  • the carrier layers 23, 27 form the end of the coil body 20.
  • the carrier layer 37 serves to isolate the two copper foils 18, 40, i.e. that no flashover from the copper foil 18 to the copper foil 40 can occur.
  • the filler layers 19, 21, 26, 36 to be formed such that after the composite layers 24, 28, 35, 38, 39, 41, 42 have reacted, the carrier layers 23, 27, 37 are removed from the coil former 20 is so that the coil body 20 is formed only by the composite layer 24, 28, 35, 38, 39 with the conductive material, in particular the copper foil 18. It is necessary that the composite layers 24, 28, 35, 38, 39 are designed to be insulating.
  • the carrier layers 23, 27, 37 can be formed from a fabric, fleece or from an insulating film, on which the composite layers 24, 28, 38, 39 are coated or impregnated onto the carrier layers 23, 27, 37 either on one side or on both sides.
  • the structure of the coil former 20 is formed from several conductive materials, in particular copper foils 18, 40, i.e. that, for example, not only two layers, but also three or more layers are possible. It is advantageous in this construction that a lower overall height for the transformer 1 is achieved, since in the conventional construction, as described in FIGS. 4 and 5, a carrier layer can be omitted when two copper foils 18, 40 overlap.
  • FIGS. 1 to 3; 4, 5; 6, 7 shown form the subject of independent, inventive solutions.
  • the tasks and solutions according to the invention in this regard can be found in the detailed descriptions of these figures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP96114762A 1995-10-03 1996-09-14 Bobine et procédé de sa fabrication pour transformateur Withdrawn EP0767473A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29623798U DE29623798U1 (de) 1995-10-03 1996-09-14 Spulenkörper für einen Transformator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT534/95U 1995-10-03
AT53495U AT1045U1 (de) 1995-10-03 1995-10-03 Spulenkörper und verfahren zu dessen herstellung für einen transformator

Publications (1)

Publication Number Publication Date
EP0767473A1 true EP0767473A1 (fr) 1997-04-09

Family

ID=3493179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114762A Withdrawn EP0767473A1 (fr) 1995-10-03 1996-09-14 Bobine et procédé de sa fabrication pour transformateur

Country Status (2)

Country Link
EP (1) EP0767473A1 (fr)
AT (1) AT1045U1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945013C1 (de) * 1999-09-20 2001-04-05 Epcos Ag Planartransformator
ES2197830A1 (es) * 2002-06-26 2004-01-01 Premo Sa Procedimiento para la fabricacion de transformadores planares y transformador planar fabricado de acuerdo con el mismo.
US6774757B2 (en) 2002-05-27 2004-08-10 Sansha Electric Manufacturing Company, Limited Coil
GB2408389A (en) * 2003-11-24 2005-05-25 Sansha Electric Mfg Co Ltd Insulation arrangement for a planar section of a coil
CN101178975B (zh) * 2006-11-10 2010-12-22 西安西电变压器有限责任公司 变压器器身软管压紧工艺
CN115424834A (zh) * 2022-11-04 2022-12-02 成都双星变压器有限公司 一种变压器低压绕组结构及其绕线设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW410353B (en) * 1998-02-13 2000-11-01 Thomson Brandt Gmbh Transformer
DE19805914A1 (de) * 1998-02-13 1999-08-19 Thomson Brandt Gmbh Transformator
DE10145278A1 (de) * 2001-09-14 2003-04-10 Sts Spezial Transformatoren St Induktives elektronisches Bauelement in Flachbauweise insbesondere Planartransformator oder Planarspule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308513A (en) * 1978-10-26 1981-12-29 Burroughs Corporation Etched magnetic coil
JPS58202519A (ja) * 1982-05-21 1983-11-25 Hitachi Ltd 樹脂被覆電気部品の製造方法
EP0491214A1 (fr) * 1990-12-19 1992-06-24 Asea Brown Boveri Ag Transformateur, en particulier transformateur d'impulsions
GB2260222A (en) * 1991-10-03 1993-04-07 Murata Manufacturing Co Flat coils

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142767A (en) * 1989-11-15 1992-09-01 Bf Goodrich Company Method of manufacturing a planar coil construction
US5239744A (en) * 1992-01-09 1993-08-31 At&T Bell Laboratories Method for making multilayer magnetic components
US5652561A (en) * 1993-06-29 1997-07-29 Yokogawa Electric Corporation Laminating type molded coil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308513A (en) * 1978-10-26 1981-12-29 Burroughs Corporation Etched magnetic coil
JPS58202519A (ja) * 1982-05-21 1983-11-25 Hitachi Ltd 樹脂被覆電気部品の製造方法
EP0491214A1 (fr) * 1990-12-19 1992-06-24 Asea Brown Boveri Ag Transformateur, en particulier transformateur d'impulsions
GB2260222A (en) * 1991-10-03 1993-04-07 Murata Manufacturing Co Flat coils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 049 (E - 230) 6 March 1984 (1984-03-06) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945013C1 (de) * 1999-09-20 2001-04-05 Epcos Ag Planartransformator
DE19945013C5 (de) * 1999-09-20 2005-10-13 Epcos Ag Planartransformator
US6774757B2 (en) 2002-05-27 2004-08-10 Sansha Electric Manufacturing Company, Limited Coil
ES2197830A1 (es) * 2002-06-26 2004-01-01 Premo Sa Procedimiento para la fabricacion de transformadores planares y transformador planar fabricado de acuerdo con el mismo.
WO2004003947A1 (fr) * 2002-06-26 2004-01-08 Premo, S.A. Procede de fabrication de transformateurs planaires et transformateur planaire fabrique selon ledit procede
GB2408389A (en) * 2003-11-24 2005-05-25 Sansha Electric Mfg Co Ltd Insulation arrangement for a planar section of a coil
GB2408389B (en) * 2003-11-24 2006-11-15 Sansha Electric Mfg Co Ltd Coil
CN101178975B (zh) * 2006-11-10 2010-12-22 西安西电变压器有限责任公司 变压器器身软管压紧工艺
CN115424834A (zh) * 2022-11-04 2022-12-02 成都双星变压器有限公司 一种变压器低压绕组结构及其绕线设备
CN115424834B (zh) * 2022-11-04 2023-03-14 成都双星变压器有限公司 一种变压器低压绕组结构及其绕线设备

Also Published As

Publication number Publication date
AT1045U1 (de) 1996-09-25

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