DE2944394A1 - CERAMIC CAPACITOR - Google Patents

Description

CERAMIC CAPACITOR

The invention relates to a ceramic capacitor according to the preamble of claim 1.

Such capacitors are e.g. from the catalog "Ceramic Power Capacitors", 3 A 5.78, der Applicant known. They can have air or water cooling, in particular the water-cooled Condensers around which the cooling liquid flows on the outer surface. With this well-known Embodiment of water-cooled condensers is not the entire outer surface area cooled; the beaded edge remains uncooled. It also becomes the central cavity such cup-shaped capacitors neither for cooling nor for increasing the capacitance value utilized.

The invention is therefore based on the object of providing a ceramic cup-shaped capacitor to place in which the central cavity to increase

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the capacitance of the capacitor is used.

This object is achieved according to the invention by the characterizing feature of claim 1 solved. Preferred developments of the invention are in the subclaims described.

The advantages achieved by the invention are in particular that the strand-like ceramic material (so-called furniture) from which the dielectric body is turned out, is better used, because the rotation drop is significantly reduced, and that with a ceramic strand of defined diameter and a defined length, a capacitor of greater capacity per unit volume can be produced. Another advantage is the increased surface area and the resulting improvement Heat dissipation to the environment or to the cooling liquid, which in the case of internal cooling also circulates Bead cools.

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Embodiments of the invention are shown in the drawing. Show it:

1 shows a multiple pot capacitor; uncooled

and
2 shows a water-cooled power capacitor.

. : ^; 1 shows an air-cooled ceramic capacitor, the dielectric body 1 of which is twisted out of a leather-hard ceramic strand and which consists of three oppositely oriented cylindrical parts, each of which is covered with a metal layer of a covering 6 'and 6 "on the inner surface 5 and on the outer surface 8. A bead 10 separates the two linings 6 and 6 ″ from one another. A η of the metal layer of the inner lining 6 is a connection fitting 4 'which is firmly soldered and protrudes beyond the open end face 7 of the pot capacitor. A second connection fitting 4 "is firmly soldered to the metal layer of the outer covering 6". This connection fitting 4 ″ can be located on the outer jacket surface or on the bottom 3 of the dielectric body 1.

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Fig. 2 shows an internally cooled power capacitor, consisting of a pot-shaped dielectric body 1, the bottom 3 of which protrudes into the central cavity 2 in the shape of a pot. The inner surface 5 and the Outer surface 8 are each covered with a metal layer of a coating 6 ', 6 ", which through the Bead 10 are electrically isolated from one another. At the end face 7 is on the dielectric body 1 a Connection fitting 4 'fastened in a watertight manner, from which two nozzles 9 ·' and 9 "protrude for the coolant circulation. On the bottom 3 of the dielectric body 1, a connection fitting 4 "is soldered to the second covering 6".

The capacitor according to the invention can be uncooled, internally cooled and / or externally cooled. The invention is not limited to the shapes of dielectric bodies shown, but applies in general for multi-stacked pot capacitors.

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Claims (1)

DRALORIC Electronic GmbH 8672 Selb, October 26, 1979 Z / P-Fi / ha 91-79 / 15 PATENT CLAIMS 1. / Ceramic capacitor with a cylinder-shaped dielectric body closed on one side, which is covered on its inner surface and on its outer surface with a metal layer of a coating, the two metal layers of the coatings being galvanically separated from one another by a metal-free bead on the outer surface of the dielectric body and a closing valve is attached to each surface, characterized, 1 30020/0361 ORIGINAL INSPECTED _ ₂ _ 29AA394 that the bottom (3) of the cup-shaped dielectric body (1) itself pot-shaped into the central cavity (2) of the Dielek trikurnköroers (1) protrudes. 2. Ceramic capacitor according to claim 1, characterized in that the bottom (3) of the dielectric body (1) several times, preferably once or twice, each oppositely directed in a pot-like manner protrudes into the central cavity (2) of the dielectric body (1). 3. Ceramic capacitor according to one of the claims 1 to 2, characterized in that the connection fitting (4 ^{1 ) for the covering (6 1} ) located on the inner surface (5) is soldered to the open end face (7) of the dielectric body (1). 4. Ceramic capacitor according to one of the claims 1 to 3, characterized in that the connection fitting (4 ") for the covering (6") located on the outer surface (8) is attached to the outer surface or to the bottom (3) of the dielectric body (1). 130020/0361 5. Ceramic capacitor according to one of the claims 1 to 4, characterized in that the connection fitting (4) for the inner lining (6 ¹ ) seals off the central cavity (2) in a watertight manner and has a connector (9 ¹ ) for a coolant inflow and a connector (9 ") for the coolant outflow . 6. Ceramic capacitor according to one of the claims 1 to 4, characterized in that the dielectric body (1) up to the metal-free bead (10) in one cylindrical heat sink with bottom closure, with the Outer covering (6 ") is conductively connected, is located, and the heat sink has a nozzle for the coolant flow and has a nozzle for the coolant drain. 7. Ceramic capacitor according to one of the claims 5 to 6, characterized in that the central cavity (2) and the outer surface of the dielectric body (1) be cooled. 1 30020/0361