Patent · US Active

Device and method for reducing network reactions when an electric arc furnace is in operation

US9918359B2 · kind B2 · utility

0Cited by

7References

4Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Klaus Krueger · Hamburg, DE
Dieter Dohnal · Lappersdorf, DE
Karsten Viereck · Teisendorf, DE
Alexei Babizki · Regensburg, DE

Key dates

Filing date	Oct 9, 2013
Grant date	Mar 13, 2018
Priority date	—
Expiry date	Oct 25, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/25
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Disclosed is a device and method for reducing network feedback during operation of an electric-arc furnace (10). The electric-arc furnace (10) has three lines (7) with one electrode (4) each. A sensor (15) for measuring the currently flowing current and a sensor (16) for measuring the currently applied voltage are provided in each line. A control and regulating unit (30) calculates an electrical actual value (Eist1, Eist2, Eist3). A semiconductor tap changer (20) is assigned to the furnace transformer (6) such that, by suitably selecting three target winding taps (TSOLL1, TSOLL2, TSOLL3) of a primary side (P) of the furnace transformer (6), a target current (IS1, IS2, IS3) is adjustable in each line (7).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.