DE3432816A1 - Metallised-plastic capacitor, especially a self-healing, end-contacted electrical wound capacitor - Google Patents

Metallised-plastic capacitor, especially a self-healing, end-contacted electrical wound capacitor

Info

Publication number
DE3432816A1
DE3432816A1 DE19843432816 DE3432816A DE3432816A1 DE 3432816 A1 DE3432816 A1 DE 3432816A1 DE 19843432816 DE19843432816 DE 19843432816 DE 3432816 A DE3432816 A DE 3432816A DE 3432816 A1 DE3432816 A1 DE 3432816A1
Authority
DE
Germany
Prior art keywords
capacitor
metallised
foils
metallized
healing
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.)
Ceased
Application number
DE19843432816
Other languages
German (de)
Inventor
Georg 8418 Teublitz Luber
Otto 8400 Regensburg Vielhuber
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
Priority to DE8423259U priority Critical patent/DE8423259U1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19843432816 priority patent/DE3432816A1/en
Publication of DE3432816A1 publication Critical patent/DE3432816A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
    • H01G13/06—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00 with provision for removing metal surfaces

Abstract

A metallised-plastic capacitor, especially a self-sealing, end-contacted electrical wound capacitor having two capacitor foils, consisting of dielectrics which are metallised on one side and whose metallic coatings 1 are offset with respect to one another, the two capacitor foils (2) being demetallised in the winding region. <IMAGE>

Description

MK-Kondensator, insbesondere selbstheilender stirnkontak-MK capacitor, especially self-healing forehead contact

tierter elektrischer Wickelkondensator.tated electrical wound capacitor.

Die Erfindung betrifft einen MK-Kondensator, insbesondere einen selbstheilenden stirn kontaktierten elektrischen Wickelkondensator mit zwei Kondensator folien, bestehend aus einseitig metallisierten, mit ihren metallischen Belegungen gegeneinander versetzten Dielektrika.The invention relates to an MK capacitor, in particular a self-healing one forehead contacted electrical wound capacitor with two capacitor foils, consisting of one side metallized, with their metallic coverings against each other offset dielectrics.

Kondensatoren der vorstehend genannten Art, die z.B.Capacitors of the aforementioned type, e.g.

Polypropylen, Polyäthylenterephthalat, Hostaphan oder Papier als Dielektrikum aufweisen, sind unter geeigneter Herausführung der Anschlußdrähte üblicherweise in flammhemmende rechteckige Kunststoffgehäuse eingesetzt und mit Gießharz feuchtesicher verschlossen.Polypropylene, polyethylene terephthalate, Hostaphan or paper as a dielectric have, are usually with suitable lead out of the connecting wires Inserted in flame-retardant rectangular plastic housing and moisture-proof with cast resin locked.

Aufgrund ihrer hohen Impuls festigkeit sind diese Wickelkondensatoren in besonderem Maße für den Einsatz in Ablenk- und Hochspannungsstufen von Fernsehgeräten geeignet z.B. als Speicher- und Tangens-Kondensatoren, als Kommutierungskondensatoren in Thyristorablenkschaltungen und als Zeilenrückschlagkondensatoren.Due to their high pulse resistance, these are wound capacitors especially for use in deflection and high voltage stages of televisions suitable e.g. as storage and tangent capacitors, as commutation capacitors in thyristor deflection circuits and as flyback capacitors.

Der Schweizer Elektrizitätsverband SEV fordert für diese auch als Y-Kondensatoren bezeichneten Kondensatoren u.a.The Swiss Electricity Association SEV also calls for this as Y capacitors denoted capacitors, among others.

eine Stoßspannungsprüfung mit der Normstoßwelle 1,2/50 ps bei einer Scheitelspannung von 5 kV, bei der diese Kondensatoren weder einen äußeren Überschlag, eine mechanische Zerstörung noch ein Absinken des Isolationswiderstandes unter festgelegte Grenzwerte zeigen dürfen.an impulse voltage test with the standard shock wave 1.2 / 50 ps at a Peak voltage of 5 kV, at which these capacitors neither have an external flashover, mechanical destruction or a drop in insulation resistance below the specified level Allow limit values to show.

Der überwiegende Teil der bisher gefertigten Y-Kondensatoren genügte dieser Forderung nicht, weshalb die Fertigung mit hohen Ausschußquoten belastet war. Die vorliegende Erfindung hat sich daher die Aufgabe gestellt, zunächst die Ursachen für diese mangelnde Stoßspannungsbelastbarkeit zu ermitteln und auf der Grundlage dieser Ermittlungsergebnisse einen Y-Kondensator zu schaffen, welcher der geforderten Stoßspannungsprüfung genügt.Most of the Y-capacitors manufactured so far were sufficient this requirement does not, which is why the production is burdened with high reject rates was. The present invention has therefore set itself the task of initially the Determine the causes for this inadequate surge voltage capacity and on the To create a Y capacitor based on these determination results, which the required surge voltage test is sufficient.

Als wesentliche Ursache für die mangelnde Stoßspannungsbelastbarkeit wurden Überschläge von Schoopschicht zu Schoopschicht im Anwickelbereich des Kondensators ermittelt, die zur Bildung einer Kohleschicht führten, die den Isolationswiderstand unter den zulässigen Grenzwert absenkt.As the main reason for the inadequate surge voltage load capacity there were flashovers from Schoopschicht to Schoopschicht in the winding area of the capacitor determined, which led to the formation of a carbon layer that reduces the insulation resistance drops below the permissible limit.

Aufgrund dieser Erkenntnisse schlägt die Erfindung zur Lösung der gestellten Aufgabe bei einem MK-Kondensator der eingangs genannten Art vor, daß beide Kondensatorfolien im Anwickelbereich z.B. auf einer Länge von ca.Based on these findings, the invention proposes to solve the The task set in an MK capacitor of the type mentioned above that both capacitor foils in the winding area, e.g. over a length of approx.

15 cm, entmetallisiert sind.15 cm, are demetallized.

Durch die Schaffung dieses entmetallisierten Anwickelbereichs wird die mögliche Wegstrecke des Uberschlags so vergrößert, daß sich auch bei der geforderten Stoßspannungsbelastbarkeit kein Uberschlag ausbilden kann.By creating this demetallized winding area, the possible distance of the rollover so increased that it is also with the required Impulse voltage resistance cannot form a flashover.

Als Dielektrikum eignet sich eine Folie aus Polypropylen, Polyäthylenterephthalat, Hostaphan oder Papier.A film made of polypropylene, polyethylene terephthalate, Hostaphan or paper.

Die Entmetallisierung der Anwickelbereiche kann z.B.The demetallization of the winding areas can e.g.

durch Abbrennen,durch Abschleifen oder Abtragen mittels Laserstrahl erfolgen, wobei die üblich zu Vorratsrollen aufgewickelten, metallisierten Kondensator folien ent- sprechend der gewünschten Kondensatorfolienlänge der einzelnen Wickelkondensatoren abgespult und dabei z.B. die Anwickelbereiche von ihrer Metallisierung befreit werden.by burning off, by grinding or ablating with a laser beam take place, with the metalized capacitor usually wound into supply rolls foils corresponding to the desired capacitor film length individual winding capacitors are unwound and, for example, the winding areas of be freed of their metallization.

Als Ausführungsbeispiel für einen elektrischen Wickelkondensator nach der Erfindung zeigt die Figur in teils gebrochener Draufsicht den teils entmetallisierten Wickelanfang eines abgerollten Wickels eines elektrischen Wickelkondensators. Mit 2 sind dabei die in ihrem Anwickelbereich entmetallisierten Dielektrikumsfolien, z.B.As an embodiment for an electrical wound capacitor according to of the invention, the figure shows the partially demetallized in a partially broken plan view Start of winding of an unrolled winding of an electrical winding capacitor. With 2 are the dielectric foils demetallized in their wrapping area, e.g.

Polypropylenfolien bezeichnet und mit 1 die auf diese Folien aufgedampften Metallschichten.Designated polypropylene films and with 1 the vapor-deposited onto these films Metal layers.

6 Patentansprüche 1 Figur - Leerseite -6 claims 1 figure - blank page -

Claims (6)

Patentansprüche 1 MK-Kondensator, insbesondere selbstheilender stirn-Kontaktierter elektrischer Wickelkondensator mit zwei Kondensatorfolien, bestehend aus einseitig metallisier-'ten, mit ihren metallischen Belegungen gegeneinander versetzten Dielektrika, d a d u r c h g e k e n n -z e i c h n e t, daß beide Kondensatorfolien (2) im Anwickelbereich entmetallisiert sind. Claims 1 MK capacitor, in particular self-healing forehead contact electric wound capacitor with two capacitor foils, consisting of one-sided metallized dielectrics offset from one another with their metallic coatings, d a d u r c h e k e n n -z e i c h n e t that both capacitor foils (2) in the winding area are demetallized. 2. MK-Kondensator nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Kondensatorfolien (2) auf etwa 15 cm Länge ihres Anwickelbereichs entmetallisiert sind. 2. MK capacitor according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the capacitor foils (2) have a length of about 15 cm in their winding area are demetallized. 3. Verfahren zur Entmetallisierung einer metallisierten Kondensatorfolie für einen MK-Kondensator nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Metallschicht (1) abgeschliffen wird. 3. Process for demetallizing a metallized capacitor film for an MK capacitor according to claim 1, d u r c h g e k e n n n z e i c h n e t that the metal layer (1) is ground off. 4. Verfahren zur Entmetallisierung einer metallisierten Kondensatorfolie für einen MK-Kondensator nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Metallschicht (1) mittels Laserstrahl abgetragen wird. 4. Process for demetallizing a metallized capacitor foil for an MK capacitor according to claim 1, d u r c h g e k e n n n z e i c h n e t that the metal layer (1) is removed by means of a laser beam. 5. Verfahren zur Entmetallisierung einer metallisierten Kondensatorfolie für einen MK-Kondensator nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Metallschicht (1) durch Abbrennen abgetragen wird. 5. Process for demetallizing a metallized capacitor film for an MK capacitor according to claim 1, d u r c h g e k e n n n z e i c h n e t that the metal layer (1) is removed by burning off. 6. Verfahren zur Entmetallisierung einer metallisierten Kondensatorfolie für einen MK-Kondensator nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t, daß die Metallschicht (1) durch hohen Stromzufluß über dem abzubrennenden Belag abgetragen wird.6. Process for demetallizing a metallized capacitor foil for an MK capacitor according to claim 5, d u r c h g e k e n n z e i c h n e t that the metal layer (1) due to a high current flow over the coating to be burned off is removed.
DE19843432816 1984-08-04 1984-09-06 Metallised-plastic capacitor, especially a self-healing, end-contacted electrical wound capacitor Ceased DE3432816A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8423259U DE8423259U1 (en) 1984-08-04 1984-08-04
DE19843432816 DE3432816A1 (en) 1984-09-06 1984-09-06 Metallised-plastic capacitor, especially a self-healing, end-contacted electrical wound capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843432816 DE3432816A1 (en) 1984-09-06 1984-09-06 Metallised-plastic capacitor, especially a self-healing, end-contacted electrical wound capacitor

Publications (1)

Publication Number Publication Date
DE3432816A1 true DE3432816A1 (en) 1986-03-13

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DE19843432816 Ceased DE3432816A1 (en) 1984-08-04 1984-09-06 Metallised-plastic capacitor, especially a self-healing, end-contacted electrical wound capacitor

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DE (1) DE3432816A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054894A1 (en) * 1998-04-23 1999-10-28 Intermedics Inc. Metallized film capacitor for use in implantable defibrillator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE980089C (en) * 1951-02-27 1970-01-15 Siemens Ag Method and electrodes for removing a metal coating applied to a carrier base made of insulating material or a painted metal foil
DE2036663A1 (en) * 1970-07-23 1972-02-03 Siemens Ag Process for the production of coating-free longitudinal edge strips on substrates which are provided with an electrically conductive coating
DE2509543A1 (en) * 1975-03-03 1976-09-09 Wilhelm Westermann METHOD AND DEVICE FOR THE PRODUCTION OF METAL-FREE STRIPS OR EDGE ON METALLIZED PLASTIC FILM FOR ELECTRIC CAPACITORS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE980089C (en) * 1951-02-27 1970-01-15 Siemens Ag Method and electrodes for removing a metal coating applied to a carrier base made of insulating material or a painted metal foil
DE2036663A1 (en) * 1970-07-23 1972-02-03 Siemens Ag Process for the production of coating-free longitudinal edge strips on substrates which are provided with an electrically conductive coating
DE2509543A1 (en) * 1975-03-03 1976-09-09 Wilhelm Westermann METHOD AND DEVICE FOR THE PRODUCTION OF METAL-FREE STRIPS OR EDGE ON METALLIZED PLASTIC FILM FOR ELECTRIC CAPACITORS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: Siemens Components, Bd. 19, Heft 3, 1981, S. 88-91 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054894A1 (en) * 1998-04-23 1999-10-28 Intermedics Inc. Metallized film capacitor for use in implantable defibrillator
US6187028B1 (en) 1998-04-23 2001-02-13 Intermedics Inc. Capacitors having metallized film with tapered thickness
US6514276B2 (en) 1998-04-23 2003-02-04 Intermedics, Inc. Metallized film capacitor for use in implantable defibrillator

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