Control system for an arc furnace

F - Mech Eng,Light,Heat,Weapons – 27 – B

Patent

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Details

F27B 3/28 (2006.01) F27D 11/10 (2006.01) F27D 19/00 (2006.01) F27D 21/00 (2006.01) H05B 7/148 (2006.01) H05B 7/156 (2006.01)

Patent

CA 2623183

A control system for and method of controlling a vertical position of at least one electrode of an arc furnace, where the arc furnace comprises a furnace transformer having a primary, input side and a secondary, output side which is electrically connected to the at least one electrode, the control system comprising : at least one current-measuring device for measuring a current as drawn by the arc furnace; a voltage-measuring device for measuring a voltage as applied across the arc furnace; and a control unit for dynamically determining a setpoint for the vertical position of the at least one electrode based on the measured values of current and voltage, and providing an actuating output for driving a lifting arrangement to adjust the vertical position of the at least one electrode so as to follow the dynamically- determined setpoint.

L'invention concerne un système de commande et un procédé destinés à commander une position verticale d'au moins une électrode d'un four à arc, ce four à arc comprenant un transformateur de four possédant un côté d'entrée principal et un côté de sortie secondaire connecté électriquement à la ou aux électrodes. Le système de commande comprend au moins un dispositif de mesure de courant destiné à mesurer un courant tiré par le four à arc, un dispositif de mesure de tension destiné à mesurer une tension appliquée dans tout le four à arc, ainsi qu'une unité de commande destinée à déterminer dynamiquement un point de consigne pour la position verticale de la ou des électrodes sur la base des valeurs mesurées de courant et de tension, et à fournir un signal de sortie d'actionnement destiné à l'entraînement d'un dispositif de levage en vue de l'ajustement de la position verticale de la ou des électrodes, ce qui permet de suivre le point de consigne déterminé dynamiquement.

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