Control arrangement

H - Electricity – 01 – H

Patent

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Details

H01H 9/54 (2006.01) H02H 3/07 (2006.01)

Patent

CA 2440772

A control arrangement (10) is operable to control an electrical relay (12) to supply current. The arrangement comprises current supply means (16) and control means (18) operable to provide a relay make signal and a relay break signal at (20) to control the state of the relay (12) to respectively make and break a connection to the current supply means (16). Further control means (28) are operable to enable or disable the current supply means (16). A first delay means (24) operates to delay enabling the current supply means (16) until after a relay make signal has been provided, to allow the relay (12) to make the connection before current supply commences. Excess current is also sensed, at (32, 34) and controlled by a form of pulse-width modulation.

L'invention concerne un système de commande (10) servant à commander un relais électrique (12) pour fournir du courant. Ce système comprend des moyens d'alimentation en courant (16) et des moyens de commande (18) servant à fournir un signal d'activation de relais et un signal de coupure de relais au niveau de (20) pour commander l'état du relais (12) afin d'activer et de couper une connexion vers le moyen d'alimentation en courant (16). D'autres moyens de commande (28) servent à activer et à désactiver le moyen d'alimentation en courant (16). Un premier élément à retard (24) sert à retarder l'activation du moyen d'alimentation en courant (16) jusqu'à la fourniture d'un signal d'activation de relais, pour permettre au relais (12) d'établir la connexion avant le début de l'alimentation en courant. Une alimentation en courant excessive est également détectée au niveau de (32, 34) et commandée par une forme de modulation d'impulsions en largeur.

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