REGELEINRICHTUNG FUER EINEN GLEICHSTROM-LICHTBOGENOFEN

摘要

1. Controlling device for a directly-heated direct-current arc furnace for melting metal, comprising an electrode adjusting device for adjusting the distance between electrode and melt, a static convertor for supplying the electrode with direct current, a current controller the input of which is supplied with the difference between a predeterminable nominal direct-current value and a measured actual direct-current value and the output signal of which is used as a control voltage signal for the static convertor, and comprising a voltage controller the input of which is supplied with the difference between a predeterminable nominal direct-voltage value and a measured actual direct-voltage value and which emits an output signal to the electrode adjusting device, characterized in that the output signal of the current controller is summed with the actual direct-voltage value (Udist ) as pilot control value.