EP0544082B1 - Verfahren zum Verdichten von Transformatorwicklungen - Google Patents

Verfahren zum Verdichten von Transformatorwicklungen Download PDF

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Publication number
EP0544082B1
EP0544082B1 EP92116946A EP92116946A EP0544082B1 EP 0544082 B1 EP0544082 B1 EP 0544082B1 EP 92116946 A EP92116946 A EP 92116946A EP 92116946 A EP92116946 A EP 92116946A EP 0544082 B1 EP0544082 B1 EP 0544082B1
Authority
EP
European Patent Office
Prior art keywords
winding
turns
electric current
accordance
current
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
EP92116946A
Other languages
English (en)
French (fr)
Other versions
EP0544082A1 (de
Inventor
Michel Sacotte
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.)
France Transfo SAS
Original Assignee
France Transfo SAS
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 France Transfo SAS filed Critical France Transfo SAS
Publication of EP0544082A1 publication Critical patent/EP0544082A1/de
Application granted granted Critical
Publication of EP0544082B1 publication Critical patent/EP0544082B1/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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the present invention is in the field of construction of inductive electrical devices of the static type, such as transformers.
  • the invention applies specifically, but not limitatively, to the cases of the windings, generally forming the “medium or high voltage” windings of the transformers, and consisting of one or more electrically conductive wires, usually made of aluminum or copper. , previously enamelled or otherwise coated with an electrically insulating material, and wound in loosely turns, in a rotation movement of uniform direction.
  • Document FR-A-1 461 785 describes a compaction process having the characteristics of the preamble of claim 1.
  • EP 0081446 discloses a particular winding technique of this kind for windings of electric transformers, which consists in introducing a continuous wire into an annular receiving space, where it turns into turns which are formed by simple removal wire under the sole effect of gravity to best form stacks of spiral flat wafers each consisting of a sheet of concentric turns
  • a uniform direction of rotation is maintained throughout the winding, so that when the device is used, the electric current flows through all the turns in the same direction.
  • the operation is entirely controlled by a programmable automaton which prints a couple of speeds (threading speeds into the receiving space and relative rotation relative to the latter) at each instant, adjusted when a coil is removed at the desired position in the wafer being formed, and this only under the effect of gravity, that is to say without significant traction or thrust on the wire.
  • This winding technique applies without particular difficulty to aluminum or copper wires having less than 0.5 mm to 5 mm and more in diameter.
  • a press presupposes having a range of pushers adapted to the varied size of the windings produced, and fitting the one that is appropriate according to the format of the winding to be packed. This also requires displacement and correct presentation of the winding under the tool.
  • the object of the present invention is to provide a settlement in height of the winding after its winding, without the intervention of external forces, therefore without the aforementioned drawbacks.
  • the subject of the invention is a method of compacting the height of an electrical winding fitted to transformers, and consisting of at least one electrically conductive wire coated with an electrically insulating material and wound in loosely wound turns. according to a rotation movement of uniform direction, process characterized in that, after its winding, a continuous electric current is passed through the turns of the winding before it is mounted in the transformer to receive it.
  • the invention consists in applying the well-known physical law according to which two parallel conductors traversed by electric currents of the same direction attract each other.
  • the intensity of the settlement current is the predominant factor.
  • the force of mutual attraction depends in fact on the square of the value of this intensity. This is of course a function of the cross section of the conductor, but the current density must be at least ten amps / mm to obtain a significant result, and several tens of amps / mm preferably, namely of the order of 20 - 40 A / mm to fix ideas, to obtain one. fully satisfactory result.
  • the invention can be implemented in a very simple manner by applying a direct electrical voltage to the two previously stripped ends of the winding.
  • the electric current used is a direct current. This current can be produced directly in this form, but more generally, it will be a rectified alternating current.
  • Tests were carried out inter alia on a primary winding of a transformer of 3.5 MVA of nominal power, constituted by an aluminum wire of 2.65 mm in diameter coated with a layer of enamel of 0.06 mm thick, and having, in the raw winding state, a height of 630 mm. This height represented an "over dimension" of 15 mm, which had to be eliminated by compaction.
  • the intensity of the direct current used was 150 A., delivered under a voltage of 2000 V.
  • the uninterrupted passage time of the current was limited to a few seconds (2 or 3 sec. Approximately) and this operation was done only once and on a non-vibrating support.
  • the invention applies to any electrical winding of a transformer, or similar device, having internal voids lost due to its technique of winding in non-tight turns, including that described in the European patent n ° 081446 already cited (removal of turns under the influence of gravity) is an example which is well representative, but in no way limitative, of the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Insulating Of Coils (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Transformer Cooling (AREA)
  • Vehicle Body Suspensions (AREA)
  • Burglar Alarm Systems (AREA)

Claims (7)

  1. Verfahren zum Verdichten einer für Transformatoren vorgesehenen Wicklung, die aus wenigstens einem elektrisch leitenden Draht besteht, der mit einem elektrisch isolierenden Material beschichtet ist und locker in Windungen entlang einer einzigen Drehrichtung aufgewickelt ist, dadurch gekennzeichnet, daß nach der Wicklung die Windungen der Spule von einem elektrischen Gleichstrom durchflossen werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Stromdichte des elektrischen Gleichstroms wenigstens 10 A/mm beträgt.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Durchflußdauer des elektrischen Stromes begrenzt ist auf einige Sekunden ohne Unterbrechung.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Durchflußdauer des elektrischen Stromes zwischen ungefähr 1 und 5 Sekunden liegt.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mehrere aufeinanderfolgende Durchflußsequenzen des elektrischen Stromes verwirklicht werden, unterbrochen von Pausenzeiten, um es der Wicklung zu ermöglichen, sich abzukühlen und den Windungen zu ermöglichen, sich zu entspannen.
  6. Verfahren nach Anspruch 1 oder 5, dadurch gekennzeichnet, daß die Wicklung während und/oder vor den Durchflußsequenzen des elektrischen Stromes mit mechanischen Schwingungen beaufschlagt wird.
  7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Wicklung seitlich festgehalten wird, um ein Anwachsen ihres Außendurchmessers zu verhindern.
EP92116946A 1991-10-16 1992-10-05 Verfahren zum Verdichten von Transformatorwicklungen Expired - Lifetime EP0544082B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112705 1991-10-16
FR9112705 1991-10-16

Publications (2)

Publication Number Publication Date
EP0544082A1 EP0544082A1 (de) 1993-06-02
EP0544082B1 true EP0544082B1 (de) 1996-02-07

Family

ID=9417936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116946A Expired - Lifetime EP0544082B1 (de) 1991-10-16 1992-10-05 Verfahren zum Verdichten von Transformatorwicklungen

Country Status (12)

Country Link
US (1) US5463806A (de)
EP (1) EP0544082B1 (de)
JP (1) JP3226988B2 (de)
KR (1) KR930008887A (de)
AT (1) ATE134067T1 (de)
AU (1) AU656229B2 (de)
CA (1) CA2080662A1 (de)
DE (1) DE69208224T2 (de)
ES (1) ES2086041T3 (de)
FI (1) FI924619A (de)
NO (1) NO305050B1 (de)
TW (1) TW207025B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012007232B4 (de) * 2012-04-07 2014-03-13 Susanne Weller Verfahren zur Herstellung von rotierenden elektrischen Maschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333328A (en) * 1964-11-30 1967-08-01 Gen Electric Methods for changing relative positions of movable conductors for use in electrical inductive devices
FR1461785A (fr) * 1964-11-30 1966-02-25 Gen Electric Procédé permettant de changer les positions relatives de conducteurs déplaçablesutilisés dans des appareils électriques à induction
GB1141136A (en) * 1966-07-28 1969-01-29 Gen Electric Method and apparatus for developing coils in inductive devices
DE2216240B2 (de) * 1972-04-04 1974-01-31 Siemens Ag, 1000 Berlin U. 8000 Muenchen Verfahren zum elektromagnetischen Formen der Wickelköpfe der in die Nuten des Ständers einer elektrischen Maschine eingebrachten Ständerwicklungen

Also Published As

Publication number Publication date
AU656229B2 (en) 1995-01-27
DE69208224D1 (de) 1996-03-21
TW207025B (de) 1993-06-01
ATE134067T1 (de) 1996-02-15
ES2086041T3 (es) 1996-06-16
CA2080662A1 (fr) 1993-04-17
JPH05205963A (ja) 1993-08-13
US5463806A (en) 1995-11-07
JP3226988B2 (ja) 2001-11-12
AU2620592A (en) 1993-04-22
NO923950L (no) 1993-04-19
NO305050B1 (no) 1999-03-22
NO923950D0 (no) 1992-10-09
DE69208224T2 (de) 1996-09-05
FI924619A (fi) 1993-04-17
FI924619A0 (fi) 1992-10-13
KR930008887A (ko) 1993-05-22
EP0544082A1 (de) 1993-06-02

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