CH257220A - Potential-controlled multi-layer winding for transformers. - Google Patents
Potential-controlled multi-layer winding for transformers.Info
- Publication number
- CH257220A CH257220A CH257220DA CH257220A CH 257220 A CH257220 A CH 257220A CH 257220D A CH257220D A CH 257220DA CH 257220 A CH257220 A CH 257220A
- Authority
- CH
- Switzerland
- Prior art keywords
- layer winding
- potential
- layers
- winding according
- layer
- Prior art date
Links
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
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
Description
Potentialgesteuerte melirlagige Wicklung für Transformatoren. Potentialgesteuerte mehrla.gige Wicklun- ;en für Transformatoren sind bekannt, und man weiss, dass bei sehr naher Aufeinander folge der Lagenenden in durchschlagfesten Körpern, wie z. B.<B>01,</B> sehr hohe Überschlags- @iadienten gemessen werden.
Jede Ra.nd- %%-indung gibt Anlass zu einer Konzentration des elektrischen Feldes an ihrer Oberfläche. Diese ist; um so kleiner, je näher die Ran.d- E%-indungeri, einander folgen.
Für hohe Spannungen nehmen die Draht lagen eine Länge an, bei der die Spannungs differenz zwischen zwei benachbarten Lagen enden so gross wird, da.ss die Drähte an den La.genenden unter Umständen glimmen, dass ferner ihr Abstand zu gross sein muss, als dass noch eine genügend vollkommene Oberflä- cliensteuerung erfolgt.
Der Überschlagsgra- dient ist dann wesentlich kleiner als bei fei ner Steuerung, d. h. als bei dichter Folge der rlieta.llisehen Lagenränder.
Nach der Erfindung werden diese Un zuträglichkeiten dadurch behoben, da-ss zwi schen je zwei aufeinanderfolgende Windungs- lagen mindestens eine leitende Schicht mit einem Steuerpotential angeordnet ist, von oder sich wenigstens der äussere Rand in der kegel- förmigen. Frontseite der Drahtlagen befindet. Diese Schicht kann aus einer nicht in sich selbst geschlossenen leitenden Folie, einem graphitie:rten Papier oder einem aufgewickel ten Draht bestehen.
Die Zwischenschichten können ihr Steuer potential dadurch erhalten, dass sie in leiten- der Verbindung mit einer entsprechenden Spulenwindung stehen oder durch kapazitive Kopplung mit den beidseitigen Drahtlagen.
Für eine besonders feine Potentialsteue rung der Spulenfrontseite sind unter Um ständen die Drähte zu dick. Die Steuerung kann in diesem Falle ausschliesslich leitenden Folien übertragen werden, welche axial etwas über die Drahtlagen vorragen, wobei wieder um die Kopplung mit den Drahtlagen kapa- zitiv sein kann oder ohmisch. Die gleich mässige Distanzierung der Steuereinlägen er folgt durch Zwischenisolationen, z. B. Pa piere. Solche Zwischenisolationen sind bei allen gesteuerten Spulen für die nötigen Di stanzierungen und Raumausfüllungen an gebracht.
Da es nicht leicht ist, Spulen so zu wik- keln, dass die Drähte in einem genügend ge nauen Begrenzungskegel enden, ist folgendes Herstellungsverfahren zweckmässig. Zwischen aufeinanderfolgenden Lagen werden, von die sen. isoliert, Steuerfolien eingelegt, welche axial vorstehen. Die fertige ,Spule; wird auf die genauen Masse der Frontfläche abgedreht. Mit den Steuerfolien muss stets eine isolie rende Bahn so eingelegt werden, dass Kurz schlusswindungen vermieden werden.
Es ist für die Potentialsteuerung wichtig, dass die gesteuerten Randflächen keine Be- schädigungen,,erfahren. Dies kann vermieden werden durch eine mechanische Verfestigung, bestehend in einer Imprägnierung der Wick- Jung mit einem Kunstharz. Als solches eig nen ,sich besonders die Niederdruckharze.
Die Abbildungen zeigen Ausführungsbei spiele des Erfindungsgegenstandes.
Es bedeuten 1 die Drahtwindungen, 2 .die leitenden Zwischenlagen, 3 das Isoliermate- rial im Innern der Spule, 4 das Isoliermate rial ausserhalb der Spule, das z. B. Luft oder ein Pressgas sein kann, oder<B>01</B> oder ein Niederdruckharz.
In Abb. 1 und 3 sind die Zwischenein- lagen leitend mit einer Windung verbunden, in Abb. 2 besteht nur eine kapazitive Kopp- lung, wobei in Abb. 1 und 2 zwischen je zwei Drahtwindungen nur eine Zwischenlage angebracht ist, in Abb. 3 je deren einige.
Potential-controlled multi-layer winding for transformers. Potential-controlled multi-layer windings for transformers are known, and it is known that with very close succession, the layer ends in dielectric-proof bodies, such as B. <B> 01, </B> very high rollover @iadients can be measured.
Every edge - %% - induction gives rise to a concentration of the electric field on its surface. This is; the smaller the closer the Ran.d- E% connections follow one another.
For high voltages, the wire layers assume a length at which the voltage difference between two adjacent layers ends is so great that the wires at the ends of the layers may glow that their distance must also be too great a sufficiently perfect surface control still takes place.
The rollover gradient is then significantly smaller than with fine control, i.e. H. than with a close succession of the rlieta.lli layer edges.
According to the invention, these inconsistencies are eliminated in that at least one conductive layer with a control potential is arranged between every two successive winding layers, from or at least the outer edge in the conical shape. Front side of the wire layers is located. This layer can consist of a non-self-contained conductive film, graphitized paper or a wound wire.
The intermediate layers can receive their control potential by being in conductive connection with a corresponding coil turn or by capacitive coupling with the wire layers on both sides.
The wires may be too thick for particularly fine potential control of the coil front. In this case, the control can exclusively be transferred to conductive foils, which protrude axially somewhat over the wire layers, again being capacitive or ohmic around the coupling with the wire layers. The even distancing of the control deposits he follows through intermediate insulation, z. B. Papers. Such intermediate isolations are placed on all controlled coils for the necessary Di punching and space fills.
Since it is not easy to wind coils in such a way that the wires end in a sufficiently precise limiting cone, the following manufacturing process is advisable. Between successive layers, of these sen. isolated, control foils inserted, which protrude axially. The finished, coil; is turned to the exact dimensions of the front surface. An insulating sheet must always be inserted with the control foils in such a way that short-circuit turns are avoided.
It is important for the potential control that the controlled edge surfaces do not experience any damage. This can be avoided by mechanical reinforcement, consisting of impregnating the Wick-Jung with a synthetic resin. As such, the low-pressure resins are particularly suitable.
The figures show exemplary embodiments of the subject matter of the invention.
1 denotes the wire windings, 2 .the conductive intermediate layers, 3 the insulating material inside the coil, 4 the insulating mate rial outside the coil, the z. B. can be air or a compressed gas, or 01 or a low-pressure resin.
In Fig. 1 and 3 the intermediate layers are conductively connected with one turn, in Fig. 2 there is only a capacitive coupling, whereas in Fig. 1 and 2 only one intermediate layer is attached between two wire windings, in Fig. 3 some of them.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH257220T | 1947-02-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH257220A true CH257220A (en) | 1948-09-30 |
Family
ID=4472079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH257220D CH257220A (en) | 1947-02-07 | 1947-02-07 | Potential-controlled multi-layer winding for transformers. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH257220A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047302B (en) * | 1953-10-24 | 1958-12-24 | Koch & Sterzel Kommanditgesell | Method for manufacturing a transformer, in particular a measuring transducer |
DE1155853B (en) * | 1961-02-08 | 1963-10-17 | Siemens Ag | In a cast resin body embedded high voltage winding for transformers, converters or the like. |
DE1247470B (en) * | 1962-05-15 | 1967-08-17 | Koch & Sterzel Wandler Und Tra | Cast resin insulated transducer for high and very high voltages |
DE1253354B (en) * | 1962-02-27 | 1967-11-02 | Siemens Ag | Process for the production of a high-voltage winding embedded in cast resin for transformers, converters or the like. Induction devices |
DE1253355B (en) * | 1964-11-05 | 1967-11-02 | Westinghouse Electric Corp | Transformer, choke coil or the like induction device |
DE1270167B (en) * | 1962-11-27 | 1968-06-12 | Licentia Gmbh | Winding embedded in cast resin for power transformers in dry construction |
DE1287201B (en) * | 1963-03-08 | 1969-01-16 | Robert Birkenbeul Gmbh | Process for the production of transformer coil bodies |
WO2000041191A1 (en) * | 1998-12-30 | 2000-07-13 | Square D Company | High frequency snubber for transformers |
-
1947
- 1947-02-07 CH CH257220D patent/CH257220A/en unknown
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1047302B (en) * | 1953-10-24 | 1958-12-24 | Koch & Sterzel Kommanditgesell | Method for manufacturing a transformer, in particular a measuring transducer |
DE1155853B (en) * | 1961-02-08 | 1963-10-17 | Siemens Ag | In a cast resin body embedded high voltage winding for transformers, converters or the like. |
DE1253354B (en) * | 1962-02-27 | 1967-11-02 | Siemens Ag | Process for the production of a high-voltage winding embedded in cast resin for transformers, converters or the like. Induction devices |
DE1247470B (en) * | 1962-05-15 | 1967-08-17 | Koch & Sterzel Wandler Und Tra | Cast resin insulated transducer for high and very high voltages |
DE1270167B (en) * | 1962-11-27 | 1968-06-12 | Licentia Gmbh | Winding embedded in cast resin for power transformers in dry construction |
DE1287201B (en) * | 1963-03-08 | 1969-01-16 | Robert Birkenbeul Gmbh | Process for the production of transformer coil bodies |
DE1253355B (en) * | 1964-11-05 | 1967-11-02 | Westinghouse Electric Corp | Transformer, choke coil or the like induction device |
WO2000041191A1 (en) * | 1998-12-30 | 2000-07-13 | Square D Company | High frequency snubber for transformers |
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