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:
May. 28, 2013
Filed:
Jul. 15, 2010
Rainer Gruber, Heilsbronn, DE;
Ulrich Halfmann, Bräuningshof, DE;
Jörg Lehmpfuhl, Erlangen, DE;
Erich Rettensteiner, Nürnberg, DE;
Rainer Gruber, Heilsbronn, DE;
Ulrich Halfmann, Bräuningshof, DE;
Jörg Lehmpfuhl, Erlangen, DE;
Erich Rettensteiner, Nürnberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A static converter that includes a power converter circuit having a plurality of interconnected module branches. Each module branch may have one or more electrically series-connected two-pole submodules as switchable voltage sources which each include a capacitor as an energy store and power semiconductors as electronic switching elements. A device for precharging the capacitors is included that has at least one power electronics device for providing an adjustable precharge current. The at least one power electronics device, being supplied with power by an auxiliary supply system and being connected to a converter bridge via a precharge transformer, can be used to achieve a sufficiently high voltage level for the capacitors of the submodules when the converter is started up so as to achieve firstly the minimum voltage for supplying power to the power semiconductors and secondly the minimum voltage for synchronization to the systems.