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:
Jun. 07, 2005
Filed:
Jul. 05, 2001
Wilhelm Reischer, Vienna, AT;
Leo Karl, Enzesfeld, AT;
Heinz Pichorner, Vienna, AT;
Franz Wöhrer, Vienna, AT;
Wilhelm Reischer, Vienna, AT;
Leo Karl, Enzesfeld, AT;
Heinz Pichorner, Vienna, AT;
Franz Wöhrer, Vienna, AT;
Siemens AG Osterreich, Vienna, AU;
Abstract
A protective circuit (SCH) for a line-commutated thyristor bridge (B, B'), which is designed for feeding energy of a power circuit connected to the bridge and also for feedback from this circuit, and which is connected between the thyristor bridge and the power circuit. In a series branch of the protective circuit, there is at least one IGBT transistor (GTGT), which is biased in the feedback direction with an inverse-parallel diode (DDD), and which can be deactivated for the appearance of a tipping recognition signal (s, U), which is supplied by a control circuit (AST) associated with the transistor.