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:
Mar. 13, 2018
Filed:
Oct. 09, 2013
Maschinenfabrik Reinhausen Gmbh, Regensburg, DE;
Klaus Krueger, Saaldorf-Surheim, DE;
Dieter Dohnal, Lappersdorf, DE;
Karsten Viereck, Regensburg, DE;
Alexei Babizki, Regensburg, DE;
MASCHINENFABRIK REINHAUSEN GMBH, Regensburg, DE;
Abstract
Disclosed is a device and method for reducing network feedback during operation of an electric-arc furnace (). The electric-arc furnace () has three lines () with one electrode () each. A sensor () for measuring the currently flowing current and a sensor () for measuring the currently applied voltage are provided in each line. A control and regulating unit () calculates an electrical actual value (E, E, E). A semiconductor tap changer () is assigned to the furnace transformer () such that, by suitably selecting three target winding taps (T, T, T) of a primary side (P) of the furnace transformer (), a target current (I, I, I) is adjustable in each line ().