EP0040382B1 - Bandwicklung für einen flüssigkeitsisolierten Transformator - Google Patents

Bandwicklung für einen flüssigkeitsisolierten Transformator Download PDF

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Publication number
EP0040382B1
EP0040382B1 EP81103568A EP81103568A EP0040382B1 EP 0040382 B1 EP0040382 B1 EP 0040382B1 EP 81103568 A EP81103568 A EP 81103568A EP 81103568 A EP81103568 A EP 81103568A EP 0040382 B1 EP0040382 B1 EP 0040382B1
Authority
EP
European Patent Office
Prior art keywords
sheet
winding
tape
cooling element
turns
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
Application number
EP81103568A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0040382A1 (de
Inventor
Lennart Lundström
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of EP0040382A1 publication Critical patent/EP0040382A1/de
Application granted granted Critical
Publication of EP0040382B1 publication Critical patent/EP0040382B1/de
Expired 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers

Definitions

  • the invention relates to a strip winding for a liquid-insulated transformer according to the preamble of claim 1.
  • the ribs are glued to form a so-called rib mat on one side of a pressboard sheet, as a result of which the pressboard sheet forms a wall in the channel lying against the winding.
  • Ribs are also used in barrier insulation made of pressingsheets and oil between parts with different potential, such as. B. between a winding coil and an outside of the same winding coil in a transformer used to create the required distance between the pressings in the barrier insulation.
  • As a substitute for such barrier insulation it has been proposed for cylindrical barrier insulation to use curled (corrugated) pressboard sheets together with smooth pressboard sheets, the latter being arranged between the corrugated sheets.
  • the smooth arches ensure that wave crests of a curved sheet do not fall into troughs of an adjacent corrugated sheet, so that longitudinal channels for the oil are formed between the sheets.
  • Corrugated pressingsheets are not suitable for forming cooling channels in tape windings because they do not have sufficient dimensional stability.
  • an insulating tape for a cylinder winding is known, as it is used for crucible induction furnaces. With such a cylindrical coil, the windings are arranged next to one another in the axial direction of the cylinder.
  • the insulating tape has the task of isolating adjacent turns from each other and keeping them at a distance.
  • the width of the insulating tape is adapted to the radial width of the conductor and consists in the longitudinal direction of spaced-apart spacing elements which are connected to one another by webs which are substantially thinner than the spacing elements perpendicular to the longitudinal direction of the tape.
  • Crosspieces and spacer elements form a homogeneous band which, together with the winding of the coil, can be wrapped between adjacent turns.
  • the radial channels created by the webs also ensure good ventilation of the coil.
  • This known tape is obviously not suitable for creating axial cooling channels in a tape winding.
  • the z. B. between hardened rollers can be brought into the desired shape and then hardened.
  • Such a plastic cannot be impregnated, so that this tape is also not suitable for liquid-insulated (oil) transformers.
  • the insulating liquid could not penetrate into the inevitable cavities in the material of the insulating tape, so that the tape material would be destroyed by mica in the cavities.
  • Such a known tape can only be used for drying spools, such as those used for. B. used in crucible induction furnaces.
  • the invention has for its object to develop a tape winding of the type mentioned, in which the cooling elements are superior to the known cooling elements in terms of both their manufacture and their nature.
  • the cooling element consists of a press washer, in which grooves are incorporated on both sides, for example by milling, the remaining material on the sides of the grooves forming the spacer elements and the remaining material on the bottom of the grooves forming the connecting pieces.
  • a cooling element can be produced in a simple manner, for example in that the press clamping disk is guided past a plurality of parallel saw blades attached to its underside and a plurality of parallel saw blades. The waste generated during sawing can be used to manufacture new clamping washers.
  • the tape of the tape winding consists of a layered electrical conductor material and layered insulating material attached to at least one side of this conductor material.
  • the conductor material is preferably a metal foil, such as. B. an aluminum or copper foil, which usually has a thickness between 5 and 3000 I Lm in heavy current transformers (power transformers).
  • the insulating material is preferably a film made of polymer which can withstand a continuous temperature of at least 90 ° C. Examples of suitable polymers for the film include polyethylene glycol terephthalate, polycarbonate and polyimide. A suitable thickness of the film is between 5-200 wm, preferably between 10-100 ⁇ m.
  • the spacer elements 11 which is shown in a section perpendicular to the longitudinal direction, consists of spacer elements 11, which extend along the entire length of the cooling element, and between the spacer elements 11 arranged connecting pieces 12, which also extend along the entire length of the Extend cooling element.
  • the height h of the spacer elements is expediently 1-10 mm and preferably 2-6 mm.
  • the distance d between adjacent spacer elements is advantageously 1-10 mm and preferably 2-6 mm.
  • the thickness t of the connecting pieces is advantageously 0.05-5 mm and preferably 0.1-3 mm, but at most 90% of the height h of the spacer elements.
  • FIG. 1 is produced in the manner indicated in FIG. 2, the cooling element consisting of pressboard.
  • a pressboard 13 is guided between support rollers 14 past a plurality of parallel saw blades 15 arranged on the top of the pressboard, which work the grooves denoted by 16 in FIG. 1 into the plates.
  • the grooves denoted by 18 in FIG. 1 are incorporated into the particle board on the underside of the particle board by the parallel saw blades 17.
  • the material that remains to the side of the grooves on the top and bottom of the press clamping disk forms the spacer elements 11, while the remaining material at the bottom of the grooves forms the connecting pieces 12, one of which is shown in broken lines in FIG. 2.
  • FIG. 3 and 4 show a leg 19a and the upper and lower yokes 19b and 19c of the iron core of a power transformer.
  • the inner winding 21 designed as a low-voltage winding, which is surrounded by the outer winding 22 designed as a high-voltage winding, sits on the leg 19a. Both windings are constructed as band windings.
  • the two windings are arranged coaxially, and a cylindrical ring-shaped space is formed between them, in which ribs 23 made of pressboard, bakelite or glass fiber-reinforced polyester are attached parallel to the longitudinal axis of the windings.
  • the inner winding is wound on a forme cylinder 24.
  • the winding 21 (FIG. 5) is made up of a plurality of turns of a tape which consists of a metal foil 30 and an insulating film 31.
  • a cooling element 10 of the type shown in FIGS. 1 and 2 is arranged between two successive turns of the band, the spacer elements 11 and the connecting pieces 12 running parallel to the axis of the winding and extending over the entire axial length of the winding.
  • the spacer elements in the exemplary embodiment have a height h of 4 mm and a width b of 3 mm, and the distance d between them is 4 mm.
  • the thickness t of the connecting pieces is 0.2 mm.
  • the spacer elements keep the adjacent turns of the tape in the winding at a distance, so that channels 32 and 33 are formed.
  • Insulating liquid such as. B. transformer oil, is passed through these channels in the winding 21 (and accordingly in the winding 22).
  • the insulating liquid is conducted from an annular liquid supply device 34 arranged on one end face 35 of the winding to the other end face 36 of the winding (FIG. 4).
  • the insulating liquid in the channels 32 and 33 comes into direct contact Contact with the tape of the winding, ie there is no pressboard layer between this tape and the insulating liquid. In this way, extremely effective cooling of the winding is achieved.
  • the flow of the insulating liquid can be forced by a pump which is arranged in a flow circuit, which also includes the feed device 34, the cooling channels 32 and 33 in the windings and the space 37 outside the windings in the transformer tank.
  • the spacer elements 11 with the connecting pieces 12 can also be arranged in a different way, for example running spirally between the band windings from one end face 35 to the other end face 36.
  • the connectors 12 need only extend along part of the length of the spacers; for example, they can consist of short pieces, between which gaps are free of spacer material. This creates connections between the channels 32 and 33.
  • the spacer elements 11 can be provided with transverse notches, holes or other recesses, via which a connection is established between channels 32 and / or channels 33 adjacent in the tangential direction of the winding.
  • the cooling element also need not consist of a single integral unit, which extends from one end face of the winding to the other.
  • the cooling element also need not be arranged between two adjacent turns of the tape winding. Rather, the cooling element according to the invention can also be arranged within the innermost turn of a tape winding, for. B. between the form cylinder 24 and the winding 21, and / or outside the outermost turn of a tape winding, z. B. between the winding 21 and the ribs 23rd

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)
  • Transformer Cooling (AREA)
  • Soft Magnetic Materials (AREA)
  • Braking Arrangements (AREA)
EP81103568A 1980-05-21 1981-05-11 Bandwicklung für einen flüssigkeitsisolierten Transformator Expired EP0040382B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8003782 1980-05-21
SE8003782A SE421570B (sv) 1980-05-21 1980-05-21 Med isolervetska kyld bandlindning for en transformator eller reaktor

Publications (2)

Publication Number Publication Date
EP0040382A1 EP0040382A1 (de) 1981-11-25
EP0040382B1 true EP0040382B1 (de) 1984-08-08

Family

ID=20341004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103568A Expired EP0040382B1 (de) 1980-05-21 1981-05-11 Bandwicklung für einen flüssigkeitsisolierten Transformator

Country Status (8)

Country Link
EP (1) EP0040382B1 (uk)
JP (1) JPS5717117A (uk)
CA (1) CA1157115A (uk)
DE (1) DE3165362D1 (uk)
DK (1) DK220181A (uk)
NO (1) NO811694L (uk)
SE (1) SE421570B (uk)
ZA (1) ZA813337B (uk)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6812583B2 (en) 2002-02-19 2004-11-02 Rockwell Scientific Licensing, Llc Electrical generator with ferrofluid bearings
DE102016221992A1 (de) * 2016-11-09 2018-05-09 Siemens Aktiengesellschaft Kern für eine elektrische Induktionseinrichtung
DE102017208814A1 (de) 2017-05-24 2018-11-29 Isotek Gmbh Distanzband, Transformatorenwicklung und Transformator sowie das Verfahren zur Herstellung eines Distanzbandes
EP3859760B1 (en) 2020-01-30 2024-06-19 Hitachi Energy Ltd Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus
EP4210076A1 (en) 2022-01-05 2023-07-12 Hitachi Energy Switzerland AG Spacer element for a winding, kit, method for manufacturing a winding and winding

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR633246A (fr) * 1926-04-24 1928-01-25 Siemens Schuckertwerke Gmbh Bobine en forme de disque pour transformateurs
GB718748A (en) * 1951-07-27 1954-11-17 Gen Electric Improvements in and relating to stationary electrical induction apparatus
GB962222A (en) * 1959-10-29 1964-07-01 English Electric Co Ltd Improvements in or relating to inductive windings
US3195084A (en) * 1962-05-23 1965-07-13 Westinghouse Electric Corp Electrical apparatus having foil wound windings and metallic duct formers
CH422145A (de) * 1961-12-15 1966-10-15 Westinghouse Electric Corp Wicklung für Transformatoren oder Drosseln
US3464043A (en) * 1967-10-16 1969-08-26 Allis Chalmers Mfg Co Conductor strip transformer winding having improved short circuit strength
GB1242401A (en) * 1967-11-07 1971-08-11 Bruce Peebles Ind Ltd Transformer or reactor winding
FR2369668A1 (fr) * 1976-10-29 1978-05-26 Bbc Brown Boveri & Cie Piece d'isolement et de se
FR2410345A1 (fr) * 1977-11-28 1979-06-22 Siemens Ag Procede pour le montage d'un enroulement magnetique supraconducteur
DE2947801A1 (de) * 1978-12-08 1980-06-19 Asea Ab Transformator oder drosselspule mit mindestens einer eine bandspule enthaltenden wicklung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514730A (en) * 1968-03-27 1970-05-26 Atomic Energy Commission Cooling spacer strip for superconducting magnets

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR633246A (fr) * 1926-04-24 1928-01-25 Siemens Schuckertwerke Gmbh Bobine en forme de disque pour transformateurs
GB718748A (en) * 1951-07-27 1954-11-17 Gen Electric Improvements in and relating to stationary electrical induction apparatus
GB962222A (en) * 1959-10-29 1964-07-01 English Electric Co Ltd Improvements in or relating to inductive windings
CH422145A (de) * 1961-12-15 1966-10-15 Westinghouse Electric Corp Wicklung für Transformatoren oder Drosseln
US3195084A (en) * 1962-05-23 1965-07-13 Westinghouse Electric Corp Electrical apparatus having foil wound windings and metallic duct formers
US3464043A (en) * 1967-10-16 1969-08-26 Allis Chalmers Mfg Co Conductor strip transformer winding having improved short circuit strength
GB1242401A (en) * 1967-11-07 1971-08-11 Bruce Peebles Ind Ltd Transformer or reactor winding
FR2369668A1 (fr) * 1976-10-29 1978-05-26 Bbc Brown Boveri & Cie Piece d'isolement et de se
FR2410345A1 (fr) * 1977-11-28 1979-06-22 Siemens Ag Procede pour le montage d'un enroulement magnetique supraconducteur
DE2947801A1 (de) * 1978-12-08 1980-06-19 Asea Ab Transformator oder drosselspule mit mindestens einer eine bandspule enthaltenden wicklung

Also Published As

Publication number Publication date
SE8003782L (sv) 1981-11-22
DK220181A (uk) 1981-11-22
NO811694L (no) 1981-11-23
DE3165362D1 (en) 1984-09-13
SE421570B (sv) 1982-01-04
CA1157115A (en) 1983-11-15
ZA813337B (en) 1982-06-30
JPS5717117A (en) 1982-01-28
EP0040382A1 (de) 1981-11-25

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