Control system for a DC arc furnace

Details Control system for a DC arc furnace Control system for a DC arc furnace

1984-11-19

1986-08-19

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Power supply system

373105, 373108, H05B 7148

Patent

active

046073736

ABSTRACT:
A control system for a DC arc furnace having a hearth adapted to contain a scrap or metal charge, an arcing electrode, a thyristor converter having a connection with the electrode and charge to form a circuit, current comparing comparator for comparing current in the circuit with a set-point current of fixed value and controlling the thyristor in response to the comparison so as to cause the current in the circuit to substantially equal the set-point current value, electrode positioning apparatus for moving the electrode up and down relative to a charge in the hearth, and a voltage comparison comparator for comparing the voltage in the circuit with a set-point voltage of fixed value and controlling the electrode positioning apparatus in response to the voltage comparison so as to keep the voltage in the circuit substantially equal to the set-point voltage.

REFERENCES:
patent: 4096344 (1978-06-01), Munson
patent: 4349912 (1982-09-01), Bello
patent: 4461010 (1984-07-01), Titus

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