EP1190427A2 - Condensateur electrolytique a faible induction - Google Patents

Condensateur electrolytique a faible induction

Info

Publication number
EP1190427A2
EP1190427A2 EP00941924A EP00941924A EP1190427A2 EP 1190427 A2 EP1190427 A2 EP 1190427A2 EP 00941924 A EP00941924 A EP 00941924A EP 00941924 A EP00941924 A EP 00941924A EP 1190427 A2 EP1190427 A2 EP 1190427A2
Authority
EP
European Patent Office
Prior art keywords
electrolytic capacitor
low
capacitor according
induction
bushing
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.)
Withdrawn
Application number
EP00941924A
Other languages
German (de)
English (en)
Inventor
Norbert Will
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.)
TDK Electronics AG
Original Assignee
Epcos 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
Application filed by Epcos AG filed Critical Epcos AG
Publication of EP1190427A2 publication Critical patent/EP1190427A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation

Definitions

  • the invention relates to a low-induction electrolytic capacitor with a cup-receiving cup and an insulating end plate, into which a plus lead-through and a minus lead-through to the roll are introduced.
  • the electrically conductive disc is provided at least in the area between the cup edge, which is connected to the cup base via the cup shell, and the minus leadthrough, this electrically conductive disc being of course arranged electrically separated from the plus leadthrough.
  • it is easily used with an electrolytic capacitor with a standard screw connection
  • the electrically conductive disk is preferably made of metal and is fastened, for example, on the upper flanged edge of the cup and the minus leadthrough and is electrically contacted.
  • a hole is provided in the pane for the positive feedthrough, it being possible, if appropriate, to arrange further holes which allow a view of the electrolytic capacitor or its cover pane.
  • the disc used in the new low-induction electrolytic capacitor serves only to open up the further current path mentioned for high-frequency currents for the negative contact between the wrap over the bottom of the cup to the negative lead-through.
  • Other functions, such as mechanical fastening tasks in particular, are not taken over by the disk.
  • the disk can be made simple and, for example, consist of a metal grid, a wire mesh or even appropriately guided individual wires.
  • the term "disc” is therefore to be understood in a very general sense and is intended to rearrange any "disc-shaped” arrangement. grasp who is able to establish the desired electrical connection.
  • the new low-induction electrolytic capacitor has both the usual direct connection between the top of the winding and the minus contact or minus bushing as well as the additionally provided "indirect” connection via the bottom of the cup, cup and disc.
  • the current can thus “split up”, which leads to a corresponding reduction in the self-inductance of the electrolytic capacitor.
  • a major advantage of the new low-induction electrolytic capacitor can be seen in the fact that the disk provided with it, which forms an essential feature of the invention, can also be easily installed in existing electrolytic capacitors.
  • the application of the invention to existing electrolytic capacitors to reduce their self-inductance does not require any difficult conversions.
  • the self-inductance can be reduced by about a third to a quarter with the electrolytic capacitor according to the invention.
  • Measurements made by the inventor have shown that inductivities of electrolytic capacitors without a disk with values of 17.7 nH, 14.8 nH or 10.8 nH when using a disk according to the invention have values of 12.7 nH, 12 , 0 nH or 7.65 nH can be reduced. These values are obtained when using a smooth or flat disc that runs parallel to the surface of the cover disc, which is present anyway.
  • the plus bushing and the minus bushing protrude above the pane, since, as has already been explained above, it is preferably placed on the rim of the cup and fastened there.
  • the pane In order to reduce the current density in the upper area of the minus bushing in which it projects above the pane, it is possible to design the pane so that it is only contacted in the upper area of the minus bushing. In other words, the disk contacts the minus bushing at its end facing away from the winding. The self-inductance of the electrolytic capacitor can thus be reduced further. However, higher demands are to be made on the contacts of the electrolytic capacitor, since the disk is curved "upwards" and practically runs in the plane of the end of the minus leadthrough.
  • the disk can also be shaped such that in addition to the plus bushing, the disk drops vertically to the height of the flanged edge, so that the disk has two different levels and the current in the disk bifilar
  • Plus bushing can flow.
  • the disk runs at a distance from it up to the plus bushing at the level of the upper end of the minus bushing and then drops to the level of the flanged edge of the cup in the area of the plus bushing. Then there is a so-called 3/4 disk.
  • the plus bushing and the minus bushing with exactly half the area of the pane and to provide the vertical drop of the pane in the area between the minus bushing and the plus bushing.
  • 1/2 disc the inductance is not as low as with the 3/4 disc; however, contacting is less problematic, since each bushing, i.e. the plus bushing and the minus bushing, has exactly half the area of the disk available for contacting.
  • the pane itself is preferably made of metal, such as aluminum. But it is also possible to put the disc on her
  • cover plate it is possible to provide points of contact between the cover plate and the plate, so that, for example, the plate presses on the cover plate, whereby the cover plate of the electrolytic capacitor can be mechanically stabilized against bulging.
  • cover plates such as, for example, rubber-coated hard paper discs.
  • the pane can also be arranged inside the electrolytic capacitor, that is, below the cover pane. With such a design, however, the self-inductance of the electrolyte The capacitor is not lowered so much because the current has to flow completely through the minus bushing which then protrudes considerably from the cover plate. In order to avoid an excessive insulation effort, if the pane is below the cover pane, it can only be attached to half of the cover pane where the minus bushing is located.
  • the cup is connected to the winding by additional impressions, such as a central bead or notches. This means that the high-frequency currents that flow over the disc can reach the cup with a lower inductive resistance. In other words, it is possible in this way to further reduce the overall inductance of the low-induction electrolytic capacitor according to the invention.
  • the pane can also consist of a grid or wire mesh.
  • the cover plate with metal in a targeted manner, so that this lamination takes over the function of the plate.
  • a suitable metal for this lamination is aluminum, since it can easily be applied by coating over the edge of the cover plate and into the interior of the electrolytic capacitor. Contact is then made via the pressure contact between the lower edge of the cover plate or its lamination (plate) to the cup.
  • Fig. 1 is a schematic sectional view of a first embodiment of the new low-induction
  • Electrolytic capacitor with a smooth metal disc on the rim of the cup Electrolytic capacitor with a smooth metal disc on the rim of the cup
  • FIG. 2 shows a schematic sectional illustration of the new low-induction electrolytic capacitor in a second exemplary embodiment with a raised disk
  • FIG. 3 shows a schematic sectional illustration of the new low-induction electrolytic capacitor in a third exemplary embodiment with a “3/4 disk”,
  • FIG. 4 shows a schematic sectional illustration of the new low-induction electrolytic capacitor in a fourth exemplary embodiment with a “1/2 disk”,
  • FIG. 5 shows a schematic sectional illustration of the new low-induction electrolytic capacitor in a fifth exemplary embodiment with a disk which also fulfills a stabilizing function
  • FIG. 6 shows a schematic sectional illustration of the new low-induction electrolytic capacitor in a sixth exemplary embodiment with a disk guided inside the capacitor
  • FIG. 7 shows a schematic sectional illustration of the new low-induction electrolyte capacitor in a seventh exemplary embodiment with a central bead and Fig. 8 is a schematic sectional view of the new low-induction electrolytic capacitor in an eighth embodiment with a disk formed by a lamination or vapor deposition.
  • Fig. 1 shows an electrolytic capacitor with a (not shown) winding cup 1 made of metal and an insulating cover plate 2, which is attached below a B ⁇ rdelrandes 3 of the cup 1.
  • a minus bushing 4 and a plus bushing 5 are provided in this insulating cover plate 2.
  • a metal disc 6 is provided on the flange edge 3, which is electrically connected to the flange edge 3 and the minus bushing 4 and has a hole in the area of the bus bushing 5, which is indicated by a broken line.
  • this disk 6 is smooth and lies flat on the flanged edge 3, whereby it can be soldered to this flanged edge, for example.
  • the disc 6 which may be made of aluminum, for example, the current from the winding over the cup bottom and the cup 1 to the minus lead-through 4, so that an additional current path to the direct connection between
  • Fig. 2 shows a second embodiment of the innovation, in which the disc 6 is designed so that it extends in the upper region of the minus bushing 4.
  • the current density in this upper region of the minus bushing 4 can thus be reduced, which enables an even lower self-inductance of the electrolytic capacitor.
  • the self-inductance of the electrolytic capacitor can be reduced from 17.7 nH (without disk) to 11.3 nH (with disk).
  • a further reduction from 12.7 nH to 11.3 nH can be achieved.
  • Fig. 3 shows a third embodiment of the new low-induction electrolytic capacitor, in which the disc 6 is designed such that the disc 6 is perpendicular to the plus bushing 5.
  • the current in the disk 6 can thus run bifilarly to the plus bushing 5.
  • the partial inductance of the plus bushing 5 is thus reduced in addition to the exemplary embodiment in FIG. 1.
  • Fig. 4 shows a fourth embodiment of the new low-induction electrolytic capacitor, in which the disc 6 is designed so that it is only half "high". That is, in comparison to the third exemplary embodiment of FIG. 3, in which the disk 6 is three quarters of its area high, here the disk 6 is half high and closed
  • the inductance is not as low as in the embodiment of FIG. 3.
  • contacting is less problematic for a customer, since exactly half the area of the disk 6 is available for contacting.
  • the disk 6 is made of metal, for example aluminum.
  • FIG. 5 shows a fifth exemplary embodiment of the new low-induction electrolytic capacitor, which is designed similarly to the exemplary embodiment from FIG. 4, since there is also a "1/2 disc" 6 here.
  • the pane 6 is provided with a curvature 7 which forms a point of contact with the cover pane 4.
  • This cover disk 4 can thus be mechanically stabilized against bulging, so that a thin, rubber-coated hard paper disk can optionally also be used for the cover disk 4.
  • Fig. 6 shows a sixth embodiment of the new low-induction electrolytic capacitor, in which the disc 6 is arranged inside the capacitor.
  • the inductance is not reduced so much because the current must flow completely through the minus bushing 4.
  • the pane 6 is only attached in the region of half of the cover pane 2. It is advantageous in such a design of the disk 6 that the manufacturing process and the external appearance remain unchanged. Ultimately, only a cover disk 2 modified by the disk 6 is required.
  • FIG. 7 shows a seventh embodiment of the new low-induction electrolytic capacitor, which essentially corresponds to the embodiment of FIG. 1.
  • a winding 9 of the electrolytic capacitor is telsicke 8 connected to the cup 1, so that there is an additional connection between the cup 1 and the winding 9.
  • the high-frequency currents flowing over the disk 6 can thus pass from the winding 9 to the cup 1 with even less inductive resistance.
  • the overall self-inductance of the electrolytic capacitor can be further reduced by this measure.
  • Such a center bead 8 can of course be used in all other exemplary embodiments of the new electrolytic capacitor. It is also possible to provide a corresponding embossing or notch or other such design for the cup 1 instead of the center bead 8.
  • the disk 6 can generally consist of a grid or wire mesh or, if appropriate, correspondingly guided individual wires, which establish an electrical connection between the cup 1 and the minus bushing 4.
  • Fig. 8 shows in an eighth embodiment of the new low-induction electrolytic capacitor, a correspondingly designed disk 6 made of a coating of metal, such as aluminum, which is vapor-deposited onto the end disk 2 over its edge and into the interior of the electrolytic capacitor, so that the contact is made via a pressure contact between the lens 2 and the lower edge of the flange 3 to the cup 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Table Devices Or Equipment (AREA)
  • Networks Using Active Elements (AREA)

Abstract

L'invention concerne un condensateur électrolytique à faible induction. Il est prévu une conduction supplémentaire de courant entre la bobine (9) et la borne négative (4) par l'intermédiaire du boîtier (1) et d'une plaque (6) électroconductrice, de manière à répartir le courant pour en réduire l'inductance propre.
EP00941924A 1999-06-28 2000-05-24 Condensateur electrolytique a faible induction Withdrawn EP1190427A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19929597A DE19929597C2 (de) 1999-06-28 1999-06-28 Induktionsarmer Elektrolyt-Kondensator
DE19929597 1999-06-28
PCT/DE2000/001661 WO2001001428A2 (fr) 1999-06-28 2000-05-24 Condensateur electrolytique a faible induction

Publications (1)

Publication Number Publication Date
EP1190427A2 true EP1190427A2 (fr) 2002-03-27

Family

ID=7912836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00941924A Withdrawn EP1190427A2 (fr) 1999-06-28 2000-05-24 Condensateur electrolytique a faible induction

Country Status (5)

Country Link
US (1) US6556426B1 (fr)
EP (1) EP1190427A2 (fr)
BR (1) BR0011924A (fr)
DE (1) DE19929597C2 (fr)
WO (1) WO2001001428A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117799A1 (de) * 2001-04-10 2002-11-07 Bosch Gmbh Robert Kondensator
DE10332093B4 (de) 2003-07-15 2017-09-14 Epcos Ag Verfahren zur Herstellung einer elektrochemischen Zelle sowie die elektrochemische Zelle
DE102006048686A1 (de) * 2006-10-14 2008-04-24 Huber, Robert Vergossener niederinduktiver Hochstromkondensator mit verbesserten Fertigungseigenschaften
DE102012208474A1 (de) 2012-05-21 2013-11-21 Robert Bosch Gmbh Axialer Kondensator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1920799A (en) * 1929-07-25 1933-08-01 Amrad Corp Seal for electrolytic condensers
JPH05144681A (ja) * 1991-11-21 1993-06-11 Oomori Denki Seisakusho:Kk 電解コンデンサ
DE4401034A1 (de) * 1994-01-15 1995-07-20 Rudolf Klaschka Deckelanordnung für Elektrolytkondensatoren
US5798906A (en) * 1996-07-17 1998-08-25 Honda Giken Kogyo Kabushiki Kaisha Capacitor
DE29718066U1 (de) 1997-10-11 1998-01-22 F & T Kondensatoren GmbH, 25813 Husum Elektrolytkondensator mit geringer Eigeninduktivität
DE29820720U1 (de) * 1998-03-10 1999-01-28 Siemens Matsushita Components GmbH & Co. KG, 81541 München Anschlußelement für Elektrolytkondensator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0101428A3 *

Also Published As

Publication number Publication date
US6556426B1 (en) 2003-04-29
WO2001001428A2 (fr) 2001-01-04
BR0011924A (pt) 2002-03-19
WO2001001428A3 (fr) 2001-10-04
DE19929597C2 (de) 2001-05-03
DE19929597A1 (de) 2001-01-11

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