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:
Dec. 12, 1995
Filed:
Mar. 29, 1995
Jan Fabianowski, Dortmund, DE;
Robert Ibach, Schwerte, DE;
ABB Patent GmbH, Mannheim, DE;
Abstract
A method for controlling current converter valves of a load-guided parallel oscillator inverter of an induction furnace includes supplying the inverter from a direct current source having positive and negative poles, and adjusting a current flow from the direct current source across the parallel oscillator by firing two diagonally opposed current converter valves of the inverter at a time. The method of the invention includes firing the two diagonally opposed current converter valves at a time with a delay between them for intermittently producing a short circuit current from the positive pole of the direct current source to the negative pole of the direct current source through two of the current converter valves being directly series-connected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile