The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 1984
Filed:
Feb. 18, 1983
Ake Archenholtz, Vaster.ang.s, SE;
Kjell Bergman, Vaster.ang.s, SE;
ASEA Aktiebolag, Vaster.ang.s, SE;
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.