Electrostatic relay

H - Electricity – 01 – H

Patent

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Details

H01H 59/00 (2006.01) H01H 1/00 (2006.01) H01H 1/20 (2006.01)

Patent

CA 2072199

An electrostatic relay essentially comprises a fixed electrode with a fixed contact insulated therefrom, a movable electrode plate with a movable contact insulated therefrom, and a fixed pair of oppositely charged electrets. The movable electrode plate is pivotally supported to a pivot so as to have a cantilever fashion or a seesaw fashion, and also to move about the pivot axis relative to the fixed electrode between two rest positions of closing and opening the contacts. A control voltage source is connected across the fixed electrode and the movable electrode plate to generate a potential difference therebetween. The electrets are disposed adjacent the movable electrode plate to generate electrostatic forces of attracting and repelling the movable electrode plate, respectively when the movable electrode plate is charged to a given polarity. That is, the attracting and repelling forces are cooperative to produce a torque for moving the movable electrode plates in one direction from one of the rest positions to the other. The electrostatic relay is useful for precisely and rapidly operating of the relay.

La présente invention porte sur un relais électrostatique comprenant essentiellement une électrode fixe munie d'un contact fixe isolé de ladite électrode, une plaque d'électrode mobile munie d'un contact isolé de ladite plaque ainsi qu'une paire d'électrets fixes de charge opposée. La plaque d'électrode mobile s'appuie sur un pivot, dans un montage en porte-à-faux ou à bascule, de façon à pouvoir se déplacer autour de l'axe du pivot et par rapport à l'électrode fixe, entre deux positions d'appui pour fermer et ouvrir les contacts. Une source de tension de commande relie l'électrode fixe à la plaque d'électrode mobile de manière à générer une différence de potentiel entre ces deux éléments. Les électrets sont adjacents à la plaque d'électrode mobile de façon à créer des forces électrostatiques qui attirent ou repoussent la plaque lorsque celle-ci est polarisée. Ainsi, les forces attractives et répulsives se conjuguent pour produire un couple qui imprime à la plaque mobile un mouvement dans une direction, allant d'une position d'appui à l'autre. L'invention assure au relais un fonctionnement précis et rapide.

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