EP0058232A1 - Enroulement en disque à partir de bobines doubles ou simples enroulées les unes dans les autres - Google Patents

Enroulement en disque à partir de bobines doubles ou simples enroulées les unes dans les autres Download PDF

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Publication number
EP0058232A1
EP0058232A1 EP81108637A EP81108637A EP0058232A1 EP 0058232 A1 EP0058232 A1 EP 0058232A1 EP 81108637 A EP81108637 A EP 81108637A EP 81108637 A EP81108637 A EP 81108637A EP 0058232 A1 EP0058232 A1 EP 0058232A1
Authority
EP
European Patent Office
Prior art keywords
winding
turns
coils
additional insulation
disc
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
Application number
EP81108637A
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German (de)
English (en)
Other versions
EP0058232B1 (fr
Inventor
Gottfried Dipl.-Math. Broszat
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.)
Transformatoren Union AG
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Transformatoren Union AG
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Publication date
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Application filed by Transformatoren Union AG filed Critical Transformatoren Union AG
Priority to AT81108637T priority Critical patent/ATE11464T1/de
Publication of EP0058232A1 publication Critical patent/EP0058232A1/fr
Application granted granted Critical
Publication of EP0058232B1 publication Critical patent/EP0058232B1/fr
Expired legal-status Critical Current

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    • 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
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields

Definitions

  • the invention relates to disc coil windings made of single or double coils, in which the insulation of the outer windings is reinforced with respect to the inner or outer surface of the winding compared to the normal insulation of the winding conductor.
  • Simple disk coil windings have a non-linear surge voltage distribution in the axial direction along the individual coils, so that breakdowns can occur between two adjacent coils when subjected to voltage surges.
  • FIG. 2 show cross-sectional exemplary embodiments of interwoven disc coils. 1 is an example of two inter-wound single coils and FIG. 2 is an example of a pair of inter-wound double coils. The windings of these disc coils are traversed by the load current in the order of the digits entered in them.
  • the disc coils are wound from two winding conductors fed simultaneously and spatially parallel to each other during the winding process. Then the winding conductor sections lying within the individual disk coils are elec- trically soldered together trisch connected in series so that the turns are removed according to the order of their digits from the high-voltage connection and thus also from the point of introduction of the surge voltage pulses. Correspondingly, the voltage against earth potential decreases with an increasing number of turns.
  • the winding indices can therefore also be viewed as a multiple of the winding voltage compared to the winding input.
  • the voltage drop in a single pass through a disc coil is called the branch voltage that occurs along the conductor. Accordingly, the single branch voltage is present in the case of a single coil winding between adjacent turns and twice the branch voltage in the case of a double coil winding between the turns.
  • the single-coil circuit is therefore preferred for higher surge voltage stresses.
  • the known interwoven disc coil windings also have their disadvantages. These are due to the increased winding stress, since instead of the single winding voltage that occurs in double coils that are not wound into one another, the single or multiple branch voltage occurs between adjacent turns, which is a multiple of the linearly calculated value during collision processes. As a result, pre-discharges in or between the disc coils are not excluded.
  • the winding insulation is therefore reinforced in interwoven coils compared to simple coils so that no winding breakdown occurs, but pre-discharges at the winding edges are accepted. As a result, part of the longitudinal capacity gained by wrapping one another is lost again.
  • the invention is based on the object of selecting the reinforcement of the conductor insulation while taking into account the economic viability and while maintaining the high noise capacity s ' o achieved by the interweaving, that pre-discharges between adjacent turns as well as between different disc coils are excluded in the test voltages provided .
  • the solution to this problem according to the invention is based on the assumption that the high field strength between adjacent windings contributes to the cause of the longitudinal rollover if the voltage between the two radially most inner or outer windings of a disk coil is rectified with the axially extending voltage along several disk coils overlaid. This is particularly the case at the edge areas on the inside and outside of the disc coils. In contrast, in the radially central region of the individual disk coils, the tension does not increase monotonically from turn to turn, but alternately increases and decreases, so that there are no crossovers. It is therefore possible to make the conductor insulation weaker in this area.
  • the above-mentioned object is accordingly achieved according to the invention in that at least in the coils lying at the winding input, starting from the inner and the outer jacket surface, at least two turns each are equipped with additional insulation, the at least one highly stressed edge of these turns being angular comprise and that the winding capacity between windings free of additional insulation is increased compared to the winding capacity of windings equipped with additional insulation.
  • more than two, in particular all, windings of the coils located at the winding input can be made with additional insulation, the thickness of which decreases to zero on the coils which are further away from the input.
  • an axial cooling channel is arranged in each case between the turn lying on the inner or outer lateral surface and the respective adjacent turn.
  • the additional insulation can consist of a paper casing surrounding the windings on all sides, of U ⁇ or of angular pressboard covers.
  • the additional insulation decreases one after the other at the locations outside, bottom inside and top inside, and in the case of the neighboring turn, the bottom inside and top inside decreases.
  • the insulation reinforcement decreases in order at the locations inside, top outside, bottom inside, and in the neighboring turn in turn upwards outside and bottom outside, again in the downward direction Earth potential and above means towards the high voltage input.
  • the turns on the inner surface of the winding on the lower outer edge and their respective adjacent turns on the lower inner edge are covered with an additional insulation angle and, accordingly, the turns on the outer surface of the winding on the upper inner edge and their disguised respective next one on the upper outer edge with an additional Isolierwinkel and the 'turns in the rest are equal to the turns in the central part of the disc coil isolated.
  • The. middle turns in the individual disc coils advantageously a common paper wrap. This paper wrapping avoids pre-discharges in the oil channel between two coils if pre-discharges in the edge conductor gussets are avoided,
  • the additional insulation and / or additional axial cooling channels are provided at least in the disk coils located near the high-voltage input of the winding and the thickness of the additional insulation is reduced with increasing distance from the high-voltage input of the winding.
  • the disc coil arrangement according to the invention can be used very advantageously in interwoven disc coils because it significantly improves their dielectric strength in the winding assembly without significantly reducing the high longitudinal capacitance obtained by the interweaving.
  • the impulse voltage of the coil winding is increased by increasing its longitudinal strength due to the winding design according to the invention.
  • the arrangement of additional axial cooling channels also partially compensates for the higher temperature rise in the more insulated edge turns. A complete compensation of the higher heating in the edge turns of the arrangement according to the invention is, if necessary, possible by a slight reinforcement of their cross sections, the I 2 R losses then decreasing with R more than the eddy current losses increase.
  • interwoven disc coils are wound from two simultaneously and spatially parallel winding conductors, the windings 1 through n of which the load current flows through in the order of the digits entered. There is a multiple between adjacent turns: the turn voltage.
  • the difference between the numbers in the windings under consideration must be multiplied by the simple winding voltage, from which the voltage difference between neighboring conductors, which occurs in the case of linear distribution, for example with alternating voltage, is obtained, which is increased by a multiple of the linear component in the case of surge voltage.
  • the continuous insulation of the winding conductors is designed for this voltage difference.
  • angle rings 30 have so far been provided on the innermost and outermost turns of each individual disk coil.
  • arcing is often observed with increasing voltage along the lines 31 indicated by dashed lines (see “ FIGS. 1 to 3).
  • the inner lines 31 often run from the uppermost input coil shown to the innermost neighboring conductor gap (gusset) of a four or more coils
  • the outer lines 31 run from the outer winding (not shown) of the uppermost input coil to the outermost adjacent conductor gap (gusset) of the lower coil drawn in, which is four or more coils away from the input coil.
  • the high field strength at the point of separation between the two adjacent edge conductors of the input coils is considered to be the cause of the first preliminary discharges.
  • the invention is based on the idea that these pre-discharges only occur along the line 31, i.e. from these "critical oil gussets" that arise at the edge of the neighboring conductor gap. run in the radial direction to the coil surface and then in the axial direction along this surface or vice versa, because only starting from these critical gussets in both directions the voltage applied to 31 increases or decreases monotonously and there are always lengths of 31 at which the permissible Slip resistance is exceeded, so that there is a longitudinal rollover along 31.
  • the lengths and tensions can, however, be changed less effectively and thus less increase their assigned sliding strength than eliminating the pre-discharges in the critical gussets as the cause of the sliding by reducing the oil field strengths there. The latter happens through the measures according to the invention.
  • the permissible slip resistance of 31 is to be understood as the experimentally determined surge voltage applied to a length 31, which just barely leads to a breakdown along 31 if pre-discharges occur at one end of .31 due to high oil field strengths.
  • additional insulation 32 is provided for strengthening the disk coil arrangement at least on the two innermost and outermost turns in each Disc coil located close to the input is provided, with the thickness of the additional insulation 32 being allowed to decrease to zero in the case of the standard coils for all windings of these input coils with decreasing voltage to earth.
  • This additional insulation 32 is supported in its effect in the exemplary embodiments according to FIGS. 13 to 17 by an axial cooling channel in each case at the above-mentioned separation points, as a result of which the critical conductor gusset is avoided entirely.
  • the additional insulation 32 is shown by simple edge angles and in the embodiment according to FIG. 14, the innermost and outermost turns of the disc coil are surrounded by a plurality of edge protection angles which are staggered in accordance with the decreasing field strength.
  • isolating agent parts projecting from the disc coils in the axial direction are dispensed with, for example by giving the edge turns a modified cross section such that the axial height including the additional insulation 32 is equal to the normal height of a normal turn.
  • Aus exemplary embodiments according to Figures 4 and 5 represented by a common turn of the middle turns of the disc coil.
  • FIGS. 4 to 17 are drawn for the example of inter-wound single coils according to FIG. 1, but also apply according to the invention for inter-wound double coils according to FIG. 2.
  • FIGS. 4 to 17 with the exception of FIG. 9, only the two inner and outer edge turns additional insulation 32, of course, are also feasible embodiments of the invention, when all turns of the coils lying on the winding input are provided with this additional insulation so that these Fig.1,2, when using all sides reinforced insulation turn insulation 32 as and - look 9, and that only the coils farther from the input are designed with turns without additional insulation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)
  • Superconductive Dynamoelectric Machines (AREA)
  • Moving Of Heads (AREA)
  • Windings For Motors And Generators (AREA)
EP81108637A 1981-02-13 1981-10-21 Enroulement en disque à partir de bobines doubles ou simples enroulées les unes dans les autres Expired EP0058232B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108637T ATE11464T1 (de) 1981-02-13 1981-10-21 Scheibenspulenwicklung aus ineinandergewickelten einzel- oder doppelspulen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813105317 DE3105317A1 (de) 1981-02-13 1981-02-13 Scheibenspulenwicklung aus ineinandergewickelten einzel- oder doppelspulen
DE3105317 1981-02-13

Publications (2)

Publication Number Publication Date
EP0058232A1 true EP0058232A1 (fr) 1982-08-25
EP0058232B1 EP0058232B1 (fr) 1985-01-23

Family

ID=6124823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108637A Expired EP0058232B1 (fr) 1981-02-13 1981-10-21 Enroulement en disque à partir de bobines doubles ou simples enroulées les unes dans les autres

Country Status (7)

Country Link
US (1) US4510475A (fr)
EP (1) EP0058232B1 (fr)
JP (1) JPS57152114A (fr)
AT (1) ATE11464T1 (fr)
BR (1) BR8200685A (fr)
CA (1) CA1186759A (fr)
DE (2) DE3105317A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006892A1 (fr) * 1985-05-03 1986-11-20 Budapesti Mu^"Szaki Egyetem Circuit de production de tension continue elevee a partir d'une tension alternative a moyenne frequence

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE31125T1 (de) * 1984-07-02 1987-12-15 Siemens Ag Scheibenspulenwicklung fuer transformatoren.
JP5932515B2 (ja) * 2012-06-25 2016-06-08 株式会社東芝 油入静止誘導電器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039620B (de) * 1957-08-21 1958-09-25 Siemens Ag Aus Scheibenspulen aufgebaute Roehrenwicklung fuer Transformatoren u. dgl.
US3023386A (en) * 1958-05-27 1962-02-27 Westinghouse Electric Corp Winding for electrical apparatus
DE975856C (de) * 1945-01-04 1962-10-31 English Electric Co Ltd Wicklungsanordnung mit Scheibenwicklungen, insbesondere fuer Transformatoren
AT259681B (de) * 1965-06-22 1968-01-25 Willem Smit & Co S Tranformato Transformatorschleifenwicklung
DE2059669A1 (de) * 1970-12-04 1972-06-08 Westinghouse Electric Corp Isoliersystem fuer ein hoher elektrischer Spannungs- und Waermebeanspruchung ausgesetztes elektrisches Geraet,wie Transformator od.dgl.
DE2246398A1 (de) * 1972-09-21 1974-03-28 Transformatoren Union Ag Lagenwicklung fuer transformatoren und drosselspulen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829354A (en) * 1954-04-29 1958-04-01 Allis Chalmers Mfg Co Coil with end turn having increased insulation
US3106690A (en) * 1958-12-10 1963-10-08 Wagner Electric Corp Electrical induction apparatus
US3246270A (en) * 1962-09-10 1966-04-12 Westinghouse Electric Corp Graded insulation for interleaved windings
DE1413549B2 (de) * 1963-09-10 1971-04-08 Licentia Patent Verwaltungs GmbH, 6000 Frankfurt Hochspannungslagenwicklung mit inneneingang fuer trans formatoren und drosselspulen
US3392326A (en) * 1966-09-28 1968-07-09 Gen Electric Coil winding buffer conductors having impedance means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975856C (de) * 1945-01-04 1962-10-31 English Electric Co Ltd Wicklungsanordnung mit Scheibenwicklungen, insbesondere fuer Transformatoren
DE1039620B (de) * 1957-08-21 1958-09-25 Siemens Ag Aus Scheibenspulen aufgebaute Roehrenwicklung fuer Transformatoren u. dgl.
US3023386A (en) * 1958-05-27 1962-02-27 Westinghouse Electric Corp Winding for electrical apparatus
AT259681B (de) * 1965-06-22 1968-01-25 Willem Smit & Co S Tranformato Transformatorschleifenwicklung
DE2059669A1 (de) * 1970-12-04 1972-06-08 Westinghouse Electric Corp Isoliersystem fuer ein hoher elektrischer Spannungs- und Waermebeanspruchung ausgesetztes elektrisches Geraet,wie Transformator od.dgl.
DE2246398A1 (de) * 1972-09-21 1974-03-28 Transformatoren Union Ag Lagenwicklung fuer transformatoren und drosselspulen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986006892A1 (fr) * 1985-05-03 1986-11-20 Budapesti Mu^"Szaki Egyetem Circuit de production de tension continue elevee a partir d'une tension alternative a moyenne frequence

Also Published As

Publication number Publication date
JPS6344283B2 (fr) 1988-09-05
US4510475A (en) 1985-04-09
BR8200685A (pt) 1982-12-14
DE3105317A1 (de) 1982-09-02
JPS57152114A (en) 1982-09-20
EP0058232B1 (fr) 1985-01-23
DE3168525D1 (en) 1985-03-07
ATE11464T1 (de) 1985-02-15
CA1186759A (fr) 1985-05-07

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