G - Physics – 05 – F
Patent
G - Physics
05
F
G05F 1/44 (2006.01) H02H 1/06 (2006.01) H02H 9/04 (2006.01)
Patent
CA 2066636
A current regulator circuit for shunting excess current from a current supply (14) utilizes two separate shunting paths (52, 68) depending on the amount of excess current on the supply line. The first shunting circuit is activated when the current exceeds some minimum level established by a zener diode (50). The second current shunting circuit is selectively activated by a switching circuit (60) which compares the current in the first shunting circuit to a reference voltage (58) that is proportional to the line current. This arrangement is advantageous in that it shunts excess current without generating significant levels of heat or adversely affecting current sensing devices.
Un circuit régulateur de courant destiné à dériver un surplus de courant d'une alimentation de courant (14) utilise deux voies de dérivation séparées (52, 68) selon le niveau de surplus de courant sur la ligne d'alimentation. Le premier circuit de dérivation est activé lorsque le courant dépasse un niveau minimum établi par une diode Zener (50). Le second circuit de dérivation de courant est activé de manière sélective par un circuit de commutation (60) qui compare le courant dans le premier circuit à une tension de référence (58) proportionnelle au courant de ligne. Cet agencement offre un avantage en ce qu'il permet de dériver le surplus de courant sans produire des niveaux importants de chaleur ni affecter les dispositifs de détection de courant.
Haun Andy Allen
Tessmer Earl John
Fetherstonhaugh & Co.
Square D. Company
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