Draloric Electronic Gmbh

Alfred Zeitner

Werner Wollenschlager

Helmut Hoffmann

Hermann Schmaus

Alois Knobl

Heinz Schlegel

Helmut Krockow

Herman Schmauss

An electric capacitor particularly for use as a high frequency power capacitor, and provided with liquid cooling, the capacitor having separated metal layers as its plates and the metal layers being separated by a densely sintered ceramic dielectric body, one embodiment of which is generally pot-shaped. Heat generated in the capacitor is dissipated by cooling liquid which is directed by a jacket surrounding that one metal layer to pass over the metal layer and dissipate the heat. The metal layer is comprised of a silver frit. To avoid the metal layer being eroded by the cooling liquid, a layer of glaze, which is resistant to the cooling liquid and whose coefficient of expansion is similar to that of the dielectric body covers over the metal layer in contact with the cooling liquid.

Electric capacitor with liquid cooling

A liquid cooled capacitor includes a disk comprised of a dielectric, e.g., ceramic, material. On both opposite surfaces of the disk are applied a respective electrode. For cooling each of the electrodes, there is a liquid cooling chamber above it. In one embodiment, there is a contact plate at the base of the liquid cooling chamber. The liquid cooling chamber can receive a circulating flow of liquid therein, and the cooling of the contact plate by the liquid will in turn cool the electrodes. Diametrically oppositely positioned liquid connections to the liquid chamber effect cooling liquid circulation. There is a cover spaced away from the contact plate of the cooling liquid chamber which encloses that chamber. The cooling liquid chamber has a peripheral side wall that extends up from the cooling plate to the spaced away cover. In an alternate embodiment, the liquid chamber includes a plurality of annular liquid coolant-carrying tubes. Diametrically oppositely positioned chambers receive the coolant and distribute same among the cooling tubes. In other embodiments, insulating material is applied around the external periphery of the capacitor and outside the disk, the peripheral walls of the cover plates above the electrodes and outside the periphery of the covers themselves.

Capacitor of disk shape with liquid cooling

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Hohenberg, Germany

Alfred Zeitner