Method for regulating the electrodes in a furnace having freely

Details Method for regulating the electrodes in a furnace having freely Method for regulating the electrodes in a furnace having freely

1986-04-03

1987-10-20

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Power supply system

373105, H05B 7148

Patent

active

047019328

ABSTRACT:
A method for the optimum regulation of the electrodes of a three-phase electric arc furnace wherein each electrode has an associated arc voltage regulator which receives the associated arc voltage as its actual value and a desired arc voltage value as its reference value; and wherein, to form the desired arc voltage value, during each halfwave, a voltage porportional to the actual arc current and a limit value, which corresponds to the desired arc length, are provided, and the smaller momentary value, with respect to magnitude, of the current proportional voltage and of the limit value is always fed to the arc voltage regulator as the desired arc voltage value.

REFERENCES:
patent: 3662075 (1972-05-01), Sakai et al.
Hoke, Werner, "Der Spannungsbedarf des stationaren Hochstromlichtbogens in einem Lichtbogenofen fur die Stahlherstellung", Jul. 29th 1980.

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