Current limiting circuit

H - Electricity – 01 – H

Patent

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H01H 47/10 (2006.01)

Patent

CA 2265636

An electronic circuit (125), and corresponding method, for controlling the closing velocity of electrical switchgear (120), includes an actuator (120) and a current detection circuit (125) that detects whether an optimum amount of current is flowing through the actuator. When the optimum amount of current is detected, a current optimizing resistor (135) is inserted into the path of the current flowing through actuator, thus limiting the current flowing through the actuator to the optimum amount. This, in turn, limits the closing velocity of the electrical switchgear and minimizes contact bounce.

Circuit électronique (125) et procédé correspondant permettant de commander la vitesse de fermeture d'un organe (120) de commutation électrique. Le circuit électronique (125) comprend un actionneur (120) et un circuit (125) de détection du courant qui détecte si une quantité optimale de courant circule à travers l'actionneur. Lorsque cette quantité optimale est détectée, une résistance (135) d'optimisation du courant est introduite sur le trajet du courant qui traverse l'actionneur, ce qui permet de limiter à la quantité optimale le courant qui circule à travers l'actionneur. De plus, il est ainsi possible de limiter la vitesse de fermeture de l'organe de commutation électrique et de réduire au maximum les rebondissements des contacts.

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