CH637500A5 - Method for producing an insulating strip material for insulation in the case of electrical apparatuses, and use of the strip material - Google Patents
Method for producing an insulating strip material for insulation in the case of electrical apparatuses, and use of the strip material Download PDFInfo
- Publication number
- CH637500A5 CH637500A5 CH36379A CH36379A CH637500A5 CH 637500 A5 CH637500 A5 CH 637500A5 CH 36379 A CH36379 A CH 36379A CH 36379 A CH36379 A CH 36379A CH 637500 A5 CH637500 A5 CH 637500A5
- Authority
- CH
- Switzerland
- Prior art keywords
- paper
- winding
- strip material
- windings
- epoxy resin
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/122—Insulating between turns or between winding layers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
- Insulating Bodies (AREA)
Description
Die Erfindung umfasst ausserdem noch ein nach dem erflndungsgemässen Verfahren hergestelltes Bandmaterial für 35 die Isolation und Durchleitung eines Kühlmediums zwischen zwei Wicklungen bei Transformatoren, bei welchem Bandmaterial die geprägten Buckel auf jeder Seite des Bandes zusammengenommen höchstens 50% der Oberfläche ausmachen und elastisch verformbar sind, beide Seiten mit Epoxyharz 40 bedeckte Stellen auf den Buckeln aufweisen, und die bedeckten Stellen auf jeder Seite zusammengenommen höchstens 50% der gesamten Oberfläche der jeweiligen Seite umfassen. The invention also includes a strip material for the insulation and passage of a cooling medium between two windings in transformers, which strip material is made of the embossed humps on each side of the strip, which together make up at most 50% of the surface and are elastically deformable, both Epoxy resin pages have 40 spots on the humps, and the covered spots on each side together make up at most 50% of the total surface area of each side.
Zudem umfasst die Erfindung noch die Verwendung des Bandmaterials in einem Transformator. In addition, the invention also includes the use of the strip material in a transformer.
45 Unter dem Prägevorgang wird eine Verformung der Oberfläche von Zellulosefaserpapier verstanden, bei der eine punktförmige Riffelung oder eine Narbung oder eine punktweise linsenförmige Erhebung allseitig von gleichartigen Vertiefungen umgeben ist, die auf der Gegenseite des Blattes 50 ihrerseits Erhebungen bilden. Solche Prägungen sind bekannt, beispielsweise bei Kreppapier oder dergleichen. 45 The embossing process is understood to mean a deformation of the surface of cellulose fiber paper in which a point-like corrugation or a grain or a point-like lenticular elevation is surrounded on all sides by similar depressions, which in turn form elevations on the opposite side of the sheet 50. Such embossings are known, for example in crepe paper or the like.
Es ist leicht vorstellbar, dass, wenn gemäss der Vorschrift nach Patentanspruch 1 die Kuppen der Buckel mit Klebstoff beschichtet werden, zwischen zwei benachbarten Buckeln 55 jeweils Stellen vorhanden sind, die ohne Klebstoff sind, so dass die mit Klebstoff beschichteten Stellen inselartig erscheinen. It is easy to imagine that if, according to the provision of claim 1, the tips of the humps are coated with adhesive, there are points between two adjacent humps 55 that are without adhesive, so that the points coated with adhesive appear island-like.
Als Klebestoff wird eine hochviskose Harzlösung bevorzugt, die beispielsweise aus 6 Teilen pulverförmigem Härter 60 gelöst in 10 Teilen Methylglykol hergestellt ist, welche Lösung darauf in 100 Teile Epoxyharz eingerührt wird. Nach einer Reifezeit von 1 Stunde bei 50 °C ist dieser Zweikomponentenkleber verwendungsbereit und kann auf die Buckel aufgewalzt, abgerollt oder sonstwie aufgetragen werden. 65 Das derart behandelte Papier, beispielsweise Pressspan, kann darauf innert weniger Minuten bei etwa 100 °C bis berührungstrocken nachgetrocknet werden. A highly viscous resin solution is preferred as the adhesive, which is produced, for example, from 6 parts of powdered hardener 60 dissolved in 10 parts of methyl glycol, which solution is then stirred into 100 parts of epoxy resin. After a maturation period of 1 hour at 50 ° C, this two-component adhesive is ready for use and can be rolled onto the hump, unrolled or applied in any other way. 65 The paper treated in this way, for example pressboard, can then be dried within a few minutes at about 100 ° C until dry to the touch.
Bei Verwendung als Isolierschicht für Transformatorspu- When used as an insulating layer for transformer
3 3rd
637 500 637 500
Ien lässt sich diese Material sehr leicht verarbeiten. Es hat sich gezeigt, dass sich das Epoxyharz sehr rasch verflüssigt und bei steigender Temperatur dünnflüssiger wird. Gleichzeitig scheidet das Papier noch Wasser ab, das gleichzeitig mit dem Aushärten ausgeschieden wird. This material is very easy to process. It has been shown that the epoxy resin liquefies very quickly and becomes thinner as the temperature rises. At the same time, the paper separates water, which is excreted at the same time as it hardens.
In Laboratoriumsversuchen wurde beispielsweise festgestellt, dass bei wenigsten 220 °C und 1 Minute Dauer schon Haftkräfte erhalten werden, die die Eigenhaftung des Pressspans bei weitem übertreffen. Bei 110° Härtungswärme und verschiedenen Zeiten der Einwirkung wurde die Haftung des vorgeschlagenen Isolationsmaterials auf Kupferstreifen geprüft: In laboratory tests, for example, it was found that at a minimum of 220 ° C and 1 minute duration, adhesive forces are obtained that far exceed the self-adhesion of the pressboard. At 110 ° C heat and different times of exposure, the adhesion of the proposed insulation material to copper strips was checked:
Behandlungsdauer Duration of treatment
Beurteilungen Assessments
(min) (min)
sofort nach 30 Minuten immediately after 30 minutes
5 5
keine Verbindung keine Verbindung no connection no connection
30 30th
vereinzelte Haftung vereinzelte Haftung speak individual liability individual liability speak
90 90
grösstenteils etwa 50% mostly about 50%
Faseraufriss Fiber breakdown
Faseraufriss Fiber breakdown
< 120 <120
grossflächiger grossflächiger large area larger area
Faseraufriss Fiber breakdown
Faseraufriss Fiber breakdown
Diese Darstellung zeigt deutlich, dass auch schon mit Betriebsbelastung eines Transformators die notwendige Wärme erzeugt werden kann, um die Haftung zu erhalten. Jedoch dürfte die Temperatur von 110 °C derart niedrig sein, 5 dass das Epoxyharz nicht fliesst, sondern direkt aushärtet. Schon aus diesem Grunde sollte die Temperatur höher gewählt werden, damit sich auch eine Haftung der Wicklungsdrähte am Isolationsmaterial ergibt. This illustration clearly shows that even with the operational load of a transformer, the necessary heat can be generated to maintain adhesion. However, the temperature of 110 ° C should be so low that 5 the epoxy does not flow, but cures directly. For this reason alone, the temperature should be chosen higher so that the winding wires also adhere to the insulation material.
Die durch Prägung erzeugten Buckel sind naturgemäss ela-io stisch federnd. Damit lässt sich ein Anpressdruck zwischen den Wicklungsdrähten und dem Isolationsband erzeugen, der genügend hoch ist, um die Drähte anzukleben, was sonst beim bekannten Isolationsmaterial nur über den Weg der Pressung der gesamten Wicklung erhalten werden konnte. The humps created by embossing are naturally elastic springy. This can create a contact pressure between the winding wires and the insulation tape, which is high enough to stick the wires, which otherwise could only be obtained with the known insulation material by pressing the entire winding.
G G
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH36379A CH637500A5 (en) | 1979-01-15 | 1979-01-15 | Method for producing an insulating strip material for insulation in the case of electrical apparatuses, and use of the strip material |
DE19803000418 DE3000418A1 (en) | 1979-01-15 | 1980-01-08 | METHOD FOR PRODUCING AN INSULATING SHEET, TAPE MATERIAL FOR THE INSULATION AND TRANSFORMER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH36379A CH637500A5 (en) | 1979-01-15 | 1979-01-15 | Method for producing an insulating strip material for insulation in the case of electrical apparatuses, and use of the strip material |
Publications (1)
Publication Number | Publication Date |
---|---|
CH637500A5 true CH637500A5 (en) | 1983-07-29 |
Family
ID=4185311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH36379A CH637500A5 (en) | 1979-01-15 | 1979-01-15 | Method for producing an insulating strip material for insulation in the case of electrical apparatuses, and use of the strip material |
Country Status (2)
Country | Link |
---|---|
CH (1) | CH637500A5 (en) |
DE (1) | DE3000418A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9073290B2 (en) * | 2010-06-29 | 2015-07-07 | E I Du Pont De Nemours And Company | Multilayer structure useful for electrical insulation |
WO2014001223A1 (en) | 2012-06-29 | 2014-01-03 | Wicor Holding Ag | Insulation element for electrical insulation in the high-voltage range |
DE102020129464B4 (en) | 2020-11-09 | 2024-07-25 | Dielektra Holding GmbH | Process for producing a wet part for a transformer from a pulp |
-
1979
- 1979-01-15 CH CH36379A patent/CH637500A5/en not_active IP Right Cessation
-
1980
- 1980-01-08 DE DE19803000418 patent/DE3000418A1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
DE3000418A1 (en) | 1980-07-24 |
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PL | Patent ceased |