EP0000210B1 - Condensateur électrique régénérable - Google Patents
Condensateur électrique régénérable Download PDFInfo
- Publication number
- EP0000210B1 EP0000210B1 EP78200006A EP78200006A EP0000210B1 EP 0000210 B1 EP0000210 B1 EP 0000210B1 EP 78200006 A EP78200006 A EP 78200006A EP 78200006 A EP78200006 A EP 78200006A EP 0000210 B1 EP0000210 B1 EP 0000210B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- aluminum
- capacitor
- covering
- capacitors
- 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
Links
- 239000003990 capacitor Substances 0.000 title claims description 27
- 230000015556 catabolic process Effects 0.000 claims description 15
- 239000011888 foil Substances 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 45
- 229910052782 aluminium Inorganic materials 0.000 description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 21
- 238000006731 degradation reaction Methods 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920000379 polypropylene carbonate Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000007425 progressive decline Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/008—Selection of materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/015—Special provisions for self-healing
Definitions
- the invention is based on a self-healing electrical capacitor, in particular an AC capacitor, according to the preamble of the main claim.
- a self-healing electrical capacitor in particular an AC capacitor, according to the preamble of the main claim.
- square resistances surface resistances per square unit
- a circular, progressive degradation of the aluminum layers sets in a, which leads to a corresponding progressive decrease in capacity due to the loss of contribution area.
- the layer degradation begins at a frequency of 50 Hz with an effective field strength of approx. 40 V! L1m.
- fluorescent lamp capacitors with metallized polypropylene foils as a dielectric for nominal voltages from 220 to 250 V / 50 Hz are made with known aluminum covering layers made of 8 ⁇ m thick foil, although the foil thickness of 6 ⁇ m for sufficiently thin aluminum layers with a square resistance greater than 3 , 5 ohms would be sufficient.
- the resulting field strength is too high, however, because at least the prescribed electrical test voltages, for example 1.25 x nominal voltage or higher, cause the layer degradation mentioned. This layer degradation therefore causes higher costs for the capacitor and larger volumes than are necessary per se.
- the aim is to prevent the above-mentioned layer degradation up to the highest field strengths permitted for the respective dielectric, or at least in the case of increased mean field strengths, or to reduce it to a practically insignificant level.
- reliable, single-layer capacitors made of metallized polypropylene or polycarbonate film are to be created for effective alternating nominal voltages up to 320 V with film thicknesses up to 6 ⁇ m, for 400 to 500 V with a film thickness of 8 ⁇ m and for voltages over 500 V with film thicknesses of 9 around or above.
- the self-healing electrical capacitor according to the invention with the characterizing features of the main claim has the advantage that the field strength-dependent layer degradation no longer occurs.
- the average proportion by weight of copper in an aluminum layer should preferably be between 2 and 5%. Copper fractions below about 0.5%, as can occur, for example, as impurities in the production of the layered metals, have no influence in the sense of the invention; with weight fractions above 10%, it can be expected that the same degradation phenomena can occur in areal precipitation of the added copper as in the aluminum layer.
- the covering layer of the capacitor is produced by the vapor deposition process, because here layers can be produced in the desired manner with high uniformity at relatively low costs.
- the healing properties of the electrical capacitor are particularly favorable if the aluminum covering layer has an average covering of less than 10 ⁇ m aluminum per cm 2 of the covering surface.
- the lower limit is recommended to be about 4 ⁇ g / cm 2 in order to limit the size of the coating resistance depending on the vapor deposition conditions.
- 6 .mu.m thick polypropylene film strip was vapor-coated on one side by thermal evaporation in vacuo with an aluminum layer which contained a weight fraction of approx. 4% copper and had a square resistance of 5 to 7 ohms.
- An alloy wire with a copper alloy content was used as the evaporation material, the total mean area coverage with the evaporation material being approximately 7 ⁇ g / cm 2 .
- Winding capacitors were produced from a pair of rolls of these tapes. Under otherwise identical conditions and dimensions, capacitors were produced for comparison with the same polypropylene film, but the coatings of which, in a known manner, consisted of aluminum layers with square resistances of 2.5 to 3 ohms. Evaporation material was high-purity aluminum wire, the average area coverage was approx. 9 ⁇ g / cm 2 .
- the covering layers according to the invention can be produced using known physical or chemical metallization processes, provided that a sufficiently homogeneous distribution of the copper admixtures to the required extent and the keeping away of harmful additives is ensured in the covering layer.
- the new capacitor covering layers can also be applied to a capacitor dielectric in the case of thin multiple layers;
- an aluminum alloy layer in combination with a metallized Zn coating layer can serve as a corrosion-inhibiting thin aluminum layer, which is more resistant to environmental influences than a Zn layer due to its oxide skin.
- the covering layer according to the invention has made it possible to provide higher nominal field strengths for the capacitors and thus to manufacture the capacitors smaller and less expensively.
- the application of the covering layer requires practically no additional effort, especially when vapor deposition, and brings considerable technical and economic advantages. Interlayers or multilayer systems, as have already been proposed, are not required. When combined with a zinc layer, for example, the higher conductivity of aluminum and the protective effect of the aluminum oxide skin could result in a reduction in the overall application for the coating layer.
- the structure of the covering layer according to the invention also has the advantage that electrical breakdowns in the dielectric, which can be triggered by operational surge peaks, burn out properly. Furthermore, higher test voltages are possible without the risk of bad burnouts, which means that the test voltage can be increased with a shorter test duration. Finally, it is also advantageous that, due to the smaller layer thickness, shorter evaporation times and a lower thermal load on the layer carrier are achieved.
- the covering layers according to the invention can be used advantageously both in impregnated and in non-impregnated capacitors, since layer degradation is also observed with impregnated capacitors from a certain average field strength.
- a layer degradation is observed with a pure aluminum layer at an average field strength of approximately 80 V / ⁇ m (50 Hz); for capacitors with a mixed dielectric of 8 microns thick metallized paper tape and 6 [tm polypropylene film with a sheet resistance of the aluminum layer of approximately 15 Q is a layer degradation 'detected in the voltage 475 V; 50 Hz.
- An aluminum covering layer has an average covering of 4 to 10 ⁇ g aluminum per cm 2 of the covering surface.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2730038A DE2730038C2 (de) | 1977-07-02 | 1977-07-02 | Selbstheilender elektrischer Kondensator |
DE2730038 | 1977-07-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0000210A1 EP0000210A1 (fr) | 1979-01-10 |
EP0000210B1 true EP0000210B1 (fr) | 1982-05-05 |
Family
ID=6013059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78200006A Expired EP0000210B1 (fr) | 1977-07-02 | 1978-06-01 | Condensateur électrique régénérable |
Country Status (5)
Country | Link |
---|---|
US (1) | US4190878A (fr) |
EP (1) | EP0000210B1 (fr) |
JP (1) | JPS5413958A (fr) |
DE (2) | DE2730038C2 (fr) |
IT (1) | IT1096867B (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2902195C2 (de) * | 1979-01-20 | 1984-09-06 | Robert Bosch Gmbh, 7000 Stuttgart | Selbstheilender elektrischer Kondensator |
EP0088137B1 (fr) * | 1982-03-06 | 1986-10-15 | Steiner KG | Condensateur électrique autorégénérable |
DE3231576A1 (de) * | 1982-08-25 | 1984-03-01 | Siemens AG, 1000 Berlin und 8000 München | Regenerierfaehiger elektrischer schichtkondensator |
JPS59136918A (ja) * | 1983-01-26 | 1984-08-06 | マルコン電子株式会社 | 積層形フイルムコンデンサ |
US5019418A (en) * | 1985-03-12 | 1991-05-28 | Sprague Electric Company | Metallized film capacitor process |
CA1266518A (fr) * | 1985-03-12 | 1990-03-06 | Raynor Linzey | Condensateur a film metallise a autoregeneration |
US4648006A (en) * | 1985-03-26 | 1987-03-03 | Illinois Tool Works Inc. | Plastic chip capacitor for surface mounting |
US4689475A (en) * | 1985-10-15 | 1987-08-25 | Raychem Corporation | Electrical devices containing conductive polymers |
US4801785A (en) * | 1986-01-14 | 1989-01-31 | Raychem Corporation | Electrical devices |
US4920452A (en) * | 1989-09-18 | 1990-04-24 | Dunmore Corporation | Metallized capacitor with corrosion resistant electrodes |
US5717563A (en) * | 1996-06-10 | 1998-02-10 | Aerovox Incorporated | Electrode patterning in metallized electrode capacitors |
EP2164416A1 (fr) | 2007-07-16 | 2010-03-24 | Stockert, Rüdiger | Dispositif destiné à la chirurgie thermique |
US8795357B2 (en) | 2011-07-15 | 2014-08-05 | Edwards Lifesciences Corporation | Perivalvular sealing for transcatheter heart valve |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB768366A (en) * | 1950-05-26 | 1957-02-13 | British Dielectric Res Ltd | Improvements in the manufacture of electric capacitors |
CH304857A (de) * | 1951-10-04 | 1955-01-31 | Gmbh Robert Bosch | Elektrischer Kondensator aus metallisierten Dielektrikumsbändern. |
GB882179A (en) * | 1957-07-26 | 1961-11-15 | Allmanna Svenska Elek Ska Axti | Electric condenser |
US3179862A (en) * | 1960-09-09 | 1965-04-20 | Cornell Dubilier Electric | Dual-film metallized condensers |
US3763409A (en) * | 1972-04-20 | 1973-10-02 | Du Pont | Capacitor with copper containing electrode |
DE2359432C3 (de) * | 1973-11-29 | 1984-08-09 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zur Herstellung von mit Aluminium beschichteten Folien für Kondensatoren und Vorrichtung zur Durchführung des Verfahrens |
-
1977
- 1977-07-02 DE DE2730038A patent/DE2730038C2/de not_active Expired
-
1978
- 1978-06-01 DE DE7878200006T patent/DE2861777D1/de not_active Expired
- 1978-06-01 EP EP78200006A patent/EP0000210B1/fr not_active Expired
- 1978-06-23 US US05/918,431 patent/US4190878A/en not_active Expired - Lifetime
- 1978-06-30 IT IT25170/78A patent/IT1096867B/it active
- 1978-06-30 JP JP7968778A patent/JPS5413958A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
US4190878A (en) | 1980-02-26 |
IT1096867B (it) | 1985-08-26 |
IT7825170A0 (it) | 1978-06-30 |
DE2730038C2 (de) | 1983-12-29 |
JPS5413958A (en) | 1979-02-01 |
EP0000210A1 (fr) | 1979-01-10 |
JPS611884B2 (fr) | 1986-01-21 |
DE2861777D1 (en) | 1982-06-24 |
DE2730038A1 (de) | 1979-01-11 |
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Legal Events
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