EP0040382A1 - Enroulement à conducteur en bande pour transformateur à liquide isolant - Google Patents
Enroulement à conducteur en bande pour transformateur à liquide isolant Download PDFInfo
- Publication number
- EP0040382A1 EP0040382A1 EP81103568A EP81103568A EP0040382A1 EP 0040382 A1 EP0040382 A1 EP 0040382A1 EP 81103568 A EP81103568 A EP 81103568A EP 81103568 A EP81103568 A EP 81103568A EP 0040382 A1 EP0040382 A1 EP 0040382A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- sheet
- turns
- tape
- cooling element
- 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
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 125000006850 spacer group Chemical group 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims description 70
- 239000004020 conductor Substances 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011093 chipboard Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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 pressboard arches and oil between parts with different potential, such as. B. between a winding coil and an outside of the other winding coil in a transformer used to create the required distance between the press arches in the barrier insulation.
- As a substitute for such barrier insulation it has been proposed to use corrugated (corrugated) pressboard sheets together with smooth pressboard sheets for cylindrical barrier insulations, the latter being arranged between the corrugated sheets.
- the smooth arches ensure that wave crests of a corrugated arc do not fall into troughs of an adjacent corrugated arc, so that longitudinal channels for the oil are formed between the arcs.
- Corrugated pressingsheets are not suitable for forming cooling channels in tape windings because they do not have sufficient dimensional stability.
- Ribs or alternative components for the formation of cooling channels in a tape winding have to withstand high pressure. This is due on the one hand to the fact that the band-shaped material has to be wound with tensile pretension in order to generate such a large radial pressure that the winding becomes homogeneous and has no play even when the conductor is not completely level during winding, and on the other hand so that large radially directed forces occur in the event of short circuits.
- 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 invention makes it possible to cool a strip winding by using a cooling element, which has considerable advantages over the known ribbed mat.
- the cooling element used according to the invention provides better cooling, since it enables direct contact between the insulating liquid and the winding, i. i.e., there is no longer a chipboard layer between the insulating liquid and the winding material.
- the cooling element is cheaper than the known ribbed mat, since in contrast to the ribbed mat, in which the ribs have to be glued manually onto the press sheet, mechanical and continuous production processes are possible.
- a further advantage is that, in contrast to the ribbed mat, no glue is used in the cooling element according to the invention, the presence of which can impair the dielectric strength.
- the new cooling element has sufficient dimensional stability.
- a preferred embodiment of the cooling element consists of a clamping 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.
- Such 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.
- thermoplastics such as polyethylene glycol terephthalate, polycarbonate and polyimide can be used, which may be mixed with fibrous or powdery fillers, such as glass fiber or chalk.
- Cooling elements made of thermoplastics are preferably formed by extrusion, but can also be produced from plates in the manner explained for pressboard with reuse of the waste generated during sawing.
- curable plastics e.g. B. glass fiber reinforced polyester, and in certain cases also use wood for the cooling elements. You can also metallic material such. B.
- cooling elements use for the cooling elements provided that the cooling element is surrounded on both sides by insulating material and that it does not form a closed turn (short-circuit turn) in the winding. It can replace one turn, part of a turn or a plurality of turns of the conductor material in the strip winding by connecting the cooling element to the conductor material along two edges running perpendicular to the winding direction of the strip.
- 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 that normally has a thickness between 5 and 3000 microns in power transformers (power transformers).
- the insulating material is preferably a film made of polymer that 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 / um, preferably between 10-100 microns.
- the cooling element 10 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 connecting pieces 12 arranged between the spacer elements 11, which also extend along the entire length of the cooling element 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 expediently 1-10 mm and preferably 2-6 mm.
- the thickness t of the connecting pieces is expediently 0.05-5 mm and preferably 0.1-3 mm, but at most 90% of that. Height h of the spacer elements.
- cooling element consists of pressboard.
- a pressboard 13 is passed 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 board.
- the grooves denoted by 18 in FIG. The material which remains on the side of the grooves on the top and bottom of the press chipboard forms the spacer elements 11, while the remaining material on the bottom of the grooves forms the connecting pieces 12, one of which is shown in broken lines in FIG.
- Figures 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.
- Two cooling elements 25 and 26 are arranged in the inner winding and two cooling elements 27 and 28 according to the invention are arranged in the outer winding. These cooling elements are all of the same type, which is why only one of them, which is designated by 25, is shown on a larger scale in FIG. 5 together with the immediately surrounding parts of the winding 21.
- the winding 21 is constructed (FIG. 5) from a plurality of turns of a strip which consists of a metal foil 30 and an insulating film 31. Between two on top of each other In the following turns of the strip, a cooling element 10 of the type shown in FIGS. 1 and 2 is arranged, 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 at a distance in the winding, so that channels 32 and 33 are formed.
- Insulating liquid such. 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, an 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 belt windows 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 there are gaps 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 can consist of several parts which are shorter in the axial direction of the winding and are arranged one behind the other in the axial direction of the winding.
- the cooling element also need not be designed as a single integral part in the winding direction of the band (circumferential direction), but it can consist of several parts arranged one behind the other in the direction mentioned.
- 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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8003782A SE421570B (sv) | 1980-05-21 | 1980-05-21 | Med isolervetska kyld bandlindning for en transformator eller reaktor |
| SE8003782 | 1980-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0040382A1 true EP0040382A1 (fr) | 1981-11-25 |
| EP0040382B1 EP0040382B1 (fr) | 1984-08-08 |
Family
ID=20341004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81103568A Expired EP0040382B1 (fr) | 1980-05-21 | 1981-05-11 | Enroulement à conducteur en bande pour transformateur à liquide isolant |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0040382B1 (fr) |
| JP (1) | JPS5717117A (fr) |
| CA (1) | CA1157115A (fr) |
| DE (1) | DE3165362D1 (fr) |
| DK (1) | DK220181A (fr) |
| NO (1) | NO811694L (fr) |
| SE (1) | SE421570B (fr) |
| ZA (1) | ZA813337B (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086810A1 (fr) * | 2016-11-09 | 2018-05-17 | Siemens Aktiengesellschaft | Noyau pour dispositif d'induction électrique |
| WO2018215434A1 (fr) | 2017-05-24 | 2018-11-29 | Isotek Gmbh | Bande d'espacement, développement de transformateur et transformateur ainsi que procédé servant à fabriquer une bande d'espacement |
| EP4210076A1 (fr) * | 2022-01-05 | 2023-07-12 | Hitachi Energy Switzerland AG | Élément d'espacement pour un enroulement, kit, procédé de fabrication d'un enroulement et enroulement |
Families Citing this family (2)
| 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 |
| EP3859760B1 (fr) | 2020-01-30 | 2024-06-19 | Hitachi Energy Ltd | Procede et structure conductrice pour la fabrication d'un enroulement electrique d'un appareil a induction electromagnetique |
Citations (1)
| 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 |
Family Cites Families (10)
| 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 |
| US3170134A (en) * | 1961-12-15 | 1965-02-16 | Westinghouse Electric Corp | Electrical coil structure for inductive apparatus |
| 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 |
| CH598679A5 (fr) * | 1976-10-29 | 1978-05-12 | Bbc Brown Boveri & Cie | |
| DE2753055C3 (de) * | 1977-11-28 | 1980-09-18 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Verfahren zum Aufbau einer supraleitenden Magnetwicklung |
| SE415418B (sv) * | 1978-12-08 | 1980-09-29 | Asea Ab | Transformator eller reaktor samt sett att framstella en sadan |
-
1980
- 1980-05-21 SE SE8003782A patent/SE421570B/sv not_active IP Right Cessation
-
1981
- 1981-05-11 DE DE8181103568T patent/DE3165362D1/de not_active Expired
- 1981-05-11 EP EP81103568A patent/EP0040382B1/fr not_active Expired
- 1981-05-19 ZA ZA00813337A patent/ZA813337B/xx unknown
- 1981-05-19 NO NO811694A patent/NO811694L/no unknown
- 1981-05-19 DK DK220181A patent/DK220181A/da not_active Application Discontinuation
- 1981-05-19 JP JP7432581A patent/JPS5717117A/ja active Pending
- 1981-05-20 CA CA000377944A patent/CA1157115A/fr not_active Expired
Patent Citations (1)
| 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086810A1 (fr) * | 2016-11-09 | 2018-05-17 | Siemens Aktiengesellschaft | Noyau pour dispositif d'induction électrique |
| CN109923626A (zh) * | 2016-11-09 | 2019-06-21 | 西门子股份公司 | 用于电感应装置的芯体 |
| CN109923626B (zh) * | 2016-11-09 | 2021-06-04 | 西门子股份公司 | 用于电感应装置的芯体 |
| US11404196B2 (en) | 2016-11-09 | 2022-08-02 | Siemens Energy Global GmbH & Co. KG | Core for an electrical induction device |
| WO2018215434A1 (fr) | 2017-05-24 | 2018-11-29 | Isotek Gmbh | Bande d'espacement, développement de transformateur et transformateur ainsi que procédé servant à fabriquer une bande d'espacement |
| DE102017208814A1 (de) | 2017-05-24 | 2018-11-29 | Isotek Gmbh | Distanzband, Transformatorenwicklung und Transformator sowie das Verfahren zur Herstellung eines Distanzbandes |
| EP4210076A1 (fr) * | 2022-01-05 | 2023-07-12 | Hitachi Energy Switzerland AG | Élément d'espacement pour un enroulement, kit, procédé de fabrication d'un enroulement et enroulement |
| WO2023131448A1 (fr) | 2022-01-05 | 2023-07-13 | Hitachi Energy Switzerland Ag | Élément d'espacement pour un enroulement, kit, procédé de fabrication d'un enroulement et enroulement |
Also Published As
| Publication number | Publication date |
|---|---|
| SE421570B (sv) | 1982-01-04 |
| DE3165362D1 (en) | 1984-09-13 |
| NO811694L (no) | 1981-11-23 |
| DK220181A (fr) | 1981-11-22 |
| SE8003782L (sv) | 1981-11-22 |
| ZA813337B (en) | 1982-06-30 |
| CA1157115A (fr) | 1983-11-15 |
| JPS5717117A (en) | 1982-01-28 |
| EP0040382B1 (fr) | 1984-08-08 |
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