Method for temperature control of inductors

Details Method for temperature control of inductors Method for temperature control of inductors

1983-02-18

1984-11-06

Envall, Jr., Roy N.

Industrial electric heating furnaces

Induction furnace device

For furnace regulating

H05B 506

Patent

active

044816391

ABSTRACT:
The invention relates to a method for temperature control in a channel of an inductor unit of a channel-type induction furnace for iron or steel. The method is characterized in that the current intensity or the power is measured, and the measuring signal (I, P) is compared with a desired value (I.sub.b, P.sub.b) in a control means for controlling the power of the inductor, the power to the inductor being switched off or reduced at a value I>I.sub.b or P>P.sub.b, where I.sub.b or P.sub.b corresponds to a temperature at or near the Curie point of the iron/steel.
In those cases where the inductor is supplied from a thyristor unit, the control can also be carried out so that a constant impedance, corresponding to the conditions at the Curie point, is maintained in the inductor circuit.

REFERENCES:
patent: 3064109 (1962-11-01), Peschel

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