EP0167896B1 - Bobinage de bobine à plateaux pour transformateurs - Google Patents

Bobinage de bobine à plateaux pour transformateurs Download PDF

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Publication number
EP0167896B1
EP0167896B1 EP85107558A EP85107558A EP0167896B1 EP 0167896 B1 EP0167896 B1 EP 0167896B1 EP 85107558 A EP85107558 A EP 85107558A EP 85107558 A EP85107558 A EP 85107558A EP 0167896 B1 EP0167896 B1 EP 0167896B1
Authority
EP
European Patent Office
Prior art keywords
disc
winding
coils
coil winding
disc coil
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
EP85107558A
Other languages
German (de)
English (en)
Other versions
EP0167896A1 (fr
Inventor
Wolfgang Dr. Dipl.-Ing. Knorr
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT85107558T priority Critical patent/ATE31125T1/de
Publication of EP0167896A1 publication Critical patent/EP0167896A1/fr
Application granted granted Critical
Publication of EP0167896B1 publication Critical patent/EP0167896B1/fr
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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/343—Preventing or reducing surge voltages; oscillations
    • 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
    • H01F27/2871—Pancake coils

Definitions

  • the invention relates to a disk coil winding for transformers comprising one or more winding conductors which alternate left and right-hand spirals and with radial cooling and insulating channels arranged between the individual disk coils.
  • Simple disc coils have a non-linear impulse voltage distribution in the axial direction along the individual coils, so that a number of measures are already known when stressed by voltage surges.
  • the disc coils are wound from two winding conductors fed simultaneously and spatially parallel to one another during the winding process. Subsequently, the winding conductor sections lying within the individual disk coils are electrically connected in series, for example by solder connections, so that the same current flows through each disk coil twice, a voltage lying within this disk coil between adjacent turns, which is equal to the product of the turn voltage and the total number of turns each Disc spool is. If the windings are provided with turn numbers in the order in which the current flows through them, the voltage against earth potential drops correspondingly with increasing turn numbers.
  • 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, in a single coil winding between adjacent turns there is a single branch voltage and in a double coil winding intertwined between the turns there is twice the branch voltage.
  • 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 simple winding voltage that occurs in double coils that are not wound into one another, the one or more branch voltages occur between adjacent turns. This branch voltage reaches a multiple of the linearly calculated value during impact 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 in the gussets between the edges of adjacent turns are often accepted. As a result, part of the longitudinal capacity gained by wrapping one another is lost again.
  • the invention is therefore an object of the invention to provide an arrangement for the coil winding of transformers, which has a further improved security against surge voltage breakdowns and still requires such a low insulation job that the heat loss occurring during normal operation can be optimally dissipated while minimizing the the winding required cross-sectional area is reached.
  • the disc coils when used on disc coil windings with stepped longitudinal capacitance, are also split in the region of jumps of the longitudinal capacitance of the winding into two parts lying axially one above the other, each forming an additional insulating channel.
  • Advantageous refinements of the invention consist in that the two parts which form the same disk coil are galvanically connected to one another at the winding lying on the inner jacket and on the outer jacket of the winding, and that at least in the disk coils having an additional insulating channel, the first and the second turn is more insulated from each other than the other turns.
  • the winding arrangement according to the invention is very advantageous because longitudinal flashovers favored by sliding discharges are reliably avoided by the electrically unloaded additional insulating channels.
  • Disc coil windings 41 and 42 are supported on an insulating and support cylinder 43 via axially parallel cooling channel strips 44.
  • Axial cooling channels lying between the axially parallel cooling channel strips 44 are connected to radial cooling and insulating channels 46 between the disk coils 41 and 42.
  • the disk coils 41 and 42 are constructed from two winding conductors wound at the same time, each of which is connected to one another in a crossed manner on the inside diameter of the disk coils 41 and 42, and the ends of which on the outside diameter of the disk coils 41 and 42 represent either a return connection in a disk coil pair or the connection to the adjacent disk coil pair. This causes the windings to flow through the windings in the order indicated by the numbers entered, i.e. H. each of the disc coils 41 and 42 is traversed twice by the current.
  • the top disk coil 41 is connected to a high voltage input 45 and the bottom disk coil 42 is either connected to ground potential and / or a star point or in a manner not shown to produce a delta connection to the high voltage input 45 of the next phase.
  • Each of the disk coils 41 and 42 is split into two parts which are identical in terms of the winding in the axial direction and form an additional insulating channel 47 between them.
  • the two parts, each forming a disc coil 41 and 42, are wound in the exemplary embodiment from winding conductors having the same cross section. Due to the winding design of the parts belonging to the same disk coil 41 or 42, there is no potential difference in the additional insulating channel 47 in the axial direction.
  • the coolant and insulating agent which also fills the additional insulating channels 47 is therefore not subjected to electrical stress in these channels during normal operation in the axial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (5)

1. Enroulement formé de bobines plates pour transformateurs, constitué par un ou plusieurs conducteurs enroulés formant des spirales s'enroulant alternativement dans le sens sinistrorsum et dans le sens dextrorsum et comportant des canaux radiaux de refroidissement et d'isolation (46) disposés entre les différentes bobines plates (41,42), caractérisé par le fait qu'au moins les bobines plates (41,42) sont subdivisées, dans la zone de l'entrée (45) de la haute tension, en deux parties identiques du point de vue de la technique de l'enroulement, superposées axialement et portées à la même tension, et entre lesquelles se trouve disposé un canal d'isolation supplémentaire (47), qui, par conséquent, n'est pas soumis à une contrainte électrique dans la direction axiale pendant le fonctionnement normal.
2. Enroulement formé de bobines plates suivant la revendication 1, comportant une capacité longitudinale échelonnée, caractérisé par le fait que les bobines plates (41, 42) sont subdivisées également au niveau de zones de sauts de la capacité longitudinale de l'enroulement, en deux parties superposées axialement et délimitant entre elles respectivement un canal d'isolation supplémentaire (47).
3. Enroulement formé de bobines plates suivant la revendication 1 ou 2, caractérisé par le fait que les deux parties constituant à l'état réuni la même bobine plate (41, 42), sont reliées entre elles galvaniquement au niveau de la spire située sur l'enveloppe intérieure et sur l'enveloppe extérieure de l'enroulement,
4. Enroulement formé de bobines plates suivant l'une des revendications 1 à 3, caractérisé par le fait qu'au moins dans les bobines plates (41, 42) possédant un canal d'isolation supplémentaire (47) et à partir du pourtour intérieur et du pourtour extérieur, respectivement la première spire et la seconde spire sont plus fortement isolées l'une par rapport à l'autre que les autres spires.
5. Enroulement formé de bobines plates suivant l'une des revendications 1 à 4, caractérisé par le fait que les deux parties qui constituent à l'état réuni respectivement une bobine plate (41,42) sont formées par l'enroulement de conducteurs possédant une même section transversale.
EP85107558A 1984-07-02 1985-06-19 Bobinage de bobine à plateaux pour transformateurs Expired EP0167896B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85107558T ATE31125T1 (de) 1984-07-02 1985-06-19 Scheibenspulenwicklung fuer transformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3424285 1984-07-02
DE3424285 1984-07-02

Publications (2)

Publication Number Publication Date
EP0167896A1 EP0167896A1 (fr) 1986-01-15
EP0167896B1 true EP0167896B1 (fr) 1987-11-25

Family

ID=6239624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107558A Expired EP0167896B1 (fr) 1984-07-02 1985-06-19 Bobinage de bobine à plateaux pour transformateurs

Country Status (4)

Country Link
EP (1) EP0167896B1 (fr)
AT (1) ATE31125T1 (fr)
BR (1) BR8503151A (fr)
DE (1) DE3561088D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397889B (de) * 1991-04-05 1994-07-25 Asta Eisen Und Metallwarenerze Drilleiter
AT399962B (de) * 1992-09-16 1995-08-25 Asta Eisen Und Metallwarenerze Drilleiter

Family Cites Families (3)

* 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
DE1225291B (de) * 1962-09-05 1966-09-22 Siemens Ag Hochspannungsroehrenwicklung aus Scheibenspulen
DE3105317A1 (de) * 1981-02-13 1982-09-02 Transformatoren Union Ag, 7000 Stuttgart Scheibenspulenwicklung aus ineinandergewickelten einzel- oder doppelspulen

Also Published As

Publication number Publication date
DE3561088D1 (en) 1988-01-07
EP0167896A1 (fr) 1986-01-15
ATE31125T1 (de) 1987-12-15
BR8503151A (pt) 1986-03-18

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