Control apparatus for a direct current arc furnace

Details Control apparatus for a direct current arc furnace Control apparatus for a direct current arc furnace

1986-02-20

1987-09-01

Envall, Jr., Roy N.

Industrial electric heating furnaces

Arc furnace device

Power supply system

H05B 7148

Patent

active

046913254

ABSTRACT:
The invention concerns a control apparatus for an arc furnace (1) comprising at least one electrode (2), and powered with direct current from an alternating current electric power source (4), through the intermediary of a controlled-rectifier converter (3).
According to the invention, this apparatus includes a loop (24) for rapid control of the reactive energy drawn from the alternating current power source (4), and a circuit (15) for limitation of the maximum intensity of the direct current flowing in the electrode (2). Preferably, the rapid control of the reactive energy is obtained by holding essentially constant the product of the intensity in the source (4) and the sine of the dephasing angle. It includes in addition a loop (13) for slow control generating a reference signal of the reactive energy applied to the said rapid control loop (24), and limiting the variation of the reactive energy.

REFERENCES:
patent: 2632862 (1953-03-01), Stoltz
patent: 3432604 (1969-03-01), Harbaugh
patent: 3968422 (1976-07-01), Waldmann
patent: 4320245 (1982-03-01), Gaydon et al.
patent: 4607373 (1986-08-01), Bergman

Affiliated with

Also associated with

Rating

Control apparatus for a direct current arc furnace does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control apparatus for a direct current arc furnace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control apparatus for a direct current arc furnace will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1268683