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:
Jul. 16, 2002
Filed:
Nov. 21, 2001
Dirk Breker, Selm, DE;
Bernhard Espendiller, Duelmen, DE;
Guido Grund, Dorsten, DE;
Klaus Schmale, Moers, DE;
SMS Demag AG, Düsseldorf, DE;
Abstract
The invention pertains to a process and to a device for supplying current to an electric-arc melting unit for melting and heating metal, especially steel, with a three-phase a.c. source, which sends the current via devices for producing direct current or alternating current to at least one electrode projecting into the vessel of the melting unit. The three-phase a.c. source ( ) is followed by at least two power supply modules ( ), connected in parallel, where each power supply module ( ) has an uncontrolled three-phase bridge ( ), a direct-current intermediate circuit ( ), and a transistor unit ( ) connected in series, and where, downline from the power supply modules ( ) in the current flow direction, a common current-carrying line ( ) leads to at least one electrode ( ) of the melting unit ( ) and away from at least one other electrode ( ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile