DE1220501B - Electrical device encased in synthetic resin - Google Patents
Electrical device encased in synthetic resinInfo
- Publication number
- DE1220501B DE1220501B DEL44025A DEL0044025A DE1220501B DE 1220501 B DE1220501 B DE 1220501B DE L44025 A DEL44025 A DE L44025A DE L0044025 A DEL0044025 A DE L0044025A DE 1220501 B DE1220501 B DE 1220501B
- Authority
- DE
- Germany
- Prior art keywords
- synthetic resin
- electrical device
- device encased
- cast
- resin
- 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.)
- Pending
Links
- 229920003002 synthetic resin Polymers 0.000 title claims description 3
- 239000000057 synthetic resin Substances 0.000 title claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H01F41/005—Impregnating or encapsulating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
In Kunstharz eingegossenes elektrisches Gerät Die Erfindung betrifft ein in Kunstharz eingegossenes elektrisches Gerät, bei dem die Ausbildung von Rissen, die als Folge von verschiedenen Ausdehnungskoeffizienten bei in Gießharz eingegossenen Geräten, wie insbesondere Kleintransformatoren, Zündtransformatoren od. ä., entstehen, auch bei extremen Temperaturschwankungen zuverlässig vermieden wird.Resin Encapsulated Electrical Apparatus This invention relates to an electrical device encased in synthetic resin, in which the formation of cracks, as a result of different expansion coefficients when cast in resin Devices, such as small transformers, ignition transformers or the like in particular, are created, is reliably avoided even with extreme temperature fluctuations.
Zur Erreichung einer elektrischen Isolierung sowie als Korrosionsschutz werden elektrische Kleingeräte wie Kleintransformatoren für die verschiedensten Zwecke, Meßwandler und ähnliche Geräte im zunehmenden Maße in kalthärtendem Gießharz eingegossen. Da die umgossenen Teile, wie Spulen und Eisenkerne, einen anderen Ausdehungskoeffizienten besitzen wie das sie umschließende Gießharz, entstehen schon beim Aushärten und im Betrieb bei größeren Temperaturschwankungen erhebliche Spannungen im Gießharzmantel, die zu Rissen und dadurch bedingter Herabminderung der elektrischen Festigkeit und Korrosionsbeständigkeit führen können. Je größer die im Betrieb auftretenden Temperaturschwankungen sind, um so größer ist die Gefahr der Rißbildung.To achieve electrical insulation and as protection against corrosion are small electrical devices such as small transformers for the most diverse Purposes, transducers and similar devices increasingly in cold-setting cast resin poured. Because the encapsulated parts, such as coils and iron cores, have a different coefficient of expansion like the casting resin that surrounds them, they are created during hardening and Considerable stresses in the cast resin jacket in the event of major temperature fluctuations during operation, which lead to cracks and the resulting reduction in electrical strength and Corrosion resistance. The greater the temperature fluctuations that occur during operation are, the greater the risk of cracking.
Es sind schon verschiedene Wege bekanntgeworden, mit denen dieser Gefahr zu begegnen versucht wird, z. B. wird dem Gießharz ein geeigneter Füllstoff, insbesondere Quarzsand, zugesetzt, wodurch die Ausdehnungsdifferenz herabgesetzt wird.Various ways have already become known with which this Attempts to counteract danger, e.g. B. is the casting resin a suitable filler, in particular quartz sand, added, which reduces the expansion difference will.
Das Aufbringen einer elastischen Zwischenschicht kann nach den bekannten Verfahren nur in teurer Handarbeit erfolgen, so daß das fertige Gerät, insbesondere wenn es sich um ein Großserienerzeugnis handelt, dadurch unverhältnismäßig verteuert wird.The application of an elastic intermediate layer can according to the known The method can only be done in expensive manual labor, so that the finished device, in particular if it is a mass-produced product, it is disproportionately expensive will.
Oder es ist schon bekannt, nur die Wicklungen so zu umgießen, daß die geschichteten Eisenkerne nachträglich eingeschoben werden können.Or it is already known to only cast around the windings in such a way that the layered iron cores can be inserted later.
Da die Rißbildung infolge der Kerbwirkung im allgemeinen an den scharfen Kanten der Eisenkerne, Spulenkörper, Lötösen usw. beginnt, ist es auch schon bekannt, nur diese vor dem Vergießen durch Glasfasermaterial od. ä. abzupolstern.Since the cracking as a result of the notch effect generally occurs on the sharp Edges of the iron cores, bobbins, solder lugs, etc., it is already known only upholstery with fiberglass material or the like before potting.
Eine zuverlässige und preiswerte Möglichkeit zur Vermeidung der Kerbwirkung von scharfen Kanten und damit der Verbesserung der Rißfestigkeit von umgossenen Gießharzmänteln bei Kleintransformatoren und ähnlichen Geräten besteht erfindungsgemäß darin, daß das Gerät vor dem Einguß in niedrigschmelzendes Kunstwachs (Schmelztemperatur etwa 130° C) getaucht wird.A reliable and inexpensive way to avoid the notch effect of sharp edges and thus the improvement of the crack resistance of cast Cast resin jackets for small transformers and similar devices exist according to the invention in that the device is poured into low-melting synthetic wax (melting temperature about 130 ° C).
Das Kunstwachs überzieht das Gerät mit einer gleichmäßigen Schicht, wobei an scharfen Kanten infolge der Kohäsionskräfte Abrundungen entstehen, so daß ihre Kerbwirkung verhindert wird, sondern es wirkt zusätzlich auch als relativ weiches Polster und vermindert insgesamt die infolge von Temperaturschwankungen entstehenden Spannungen im Gießharzmantel. Gegegenüber allen anderen bekannten Wegen hat dieses außer seiner absoluten Zuverlässigkeit auch bei sehr hohen Temperaturspannungen den Vorteil einer sehr billigen, arbeitssparenden und einfachen Anwendung.The artificial wax covers the device with an even layer, with rounded edges at sharp edges as a result of the cohesive forces, so that its notch effect is prevented, but it also acts as a relatively soft one Cushions and reduces overall those resulting from temperature fluctuations Tensions in the cast resin jacket. Opposite all other known ways, this one has apart from its absolute reliability even at very high temperature voltages the advantage of a very cheap, labor-saving and simple application.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL44025A DE1220501B (en) | 1963-01-30 | 1963-01-30 | Electrical device encased in synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL44025A DE1220501B (en) | 1963-01-30 | 1963-01-30 | Electrical device encased in synthetic resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1220501B true DE1220501B (en) | 1966-07-07 |
Family
ID=7270511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL44025A Pending DE1220501B (en) | 1963-01-30 | 1963-01-30 | Electrical device encased in synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1220501B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0615261A1 (en) * | 1993-03-10 | 1994-09-14 | Vacuumschmelze Gmbh | Method of making an inductive component having increased noise reduction and reduced stress susceptibility |
| EP1530225A3 (en) * | 2003-11-06 | 2008-08-06 | Tyco Electronics Belgium EC N.V. | Electric coil arrangement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH268951A (en) * | 1948-10-05 | 1950-06-15 | Oerlikon Maschf | Current transformer with windings embedded in a solid insulating compound. |
| CH300390A (en) * | 1952-05-03 | 1954-07-31 | Oerlikon Maschf | Insulation for bundles of conductors in high-voltage windings in electrical machines. |
| CH316936A (en) * | 1952-06-19 | 1956-10-31 | Licentia Gmbh | Electrical device part encased in plastic |
-
1963
- 1963-01-30 DE DEL44025A patent/DE1220501B/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH268951A (en) * | 1948-10-05 | 1950-06-15 | Oerlikon Maschf | Current transformer with windings embedded in a solid insulating compound. |
| CH300390A (en) * | 1952-05-03 | 1954-07-31 | Oerlikon Maschf | Insulation for bundles of conductors in high-voltage windings in electrical machines. |
| CH316936A (en) * | 1952-06-19 | 1956-10-31 | Licentia Gmbh | Electrical device part encased in plastic |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0615261A1 (en) * | 1993-03-10 | 1994-09-14 | Vacuumschmelze Gmbh | Method of making an inductive component having increased noise reduction and reduced stress susceptibility |
| EP1530225A3 (en) * | 2003-11-06 | 2008-08-06 | Tyco Electronics Belgium EC N.V. | Electric coil arrangement |
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