Circuit arrangement for an electric melting furnace

Details Circuit arrangement for an electric melting furnace Circuit arrangement for an electric melting furnace

1975-05-15

1976-08-10

Shoop, William M.

Electric heating

Microwave heating

Tunnel furnace

219131WR, 321 16, 330 86, H02M 118

Patent

active

039744361

ABSTRACT:
The invention concerns a circuit arrangement for use with an electric melting furnace of a type which is fed by a converter, the latter converter being equipped with thyristors and controlled by a control unit and a series-connected current regulator. More specifically, in accord with the invention, the circuit arrangement is provided with monitoring circuits for monitoring the operation of the thyristors. These monitoring circuits, in turn, generate signals which control switches for selectively short-circuiting the feedback resistors of the regulator.

REFERENCES:
patent: 3045168 (1962-07-01), Fellendorf
patent: 3045224 (1962-07-01), Colaiaco
patent: 3370216 (1968-02-01), Bowar et al.
patent: 3497830 (1970-02-01), Colton et al.
patent: 3764885 (1973-10-01), Buxbaum et al.

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