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:
Oct. 05, 2021
Filed:
Aug. 27, 2018
Siemens Energy Global Gmbh & Co. KG, Munich, DE;
Martin Pieschel, Altdorf, DE;
Siemens Energy Global GmbH & Co. KG, Munich, DE;
Abstract
A multiphase multilevel power converter includes a phase module having submodules with an energy storage device. An energy storage device voltage is connectable and disconnectiable as a submodule voltage between two submodule poles. To attenuate higher-frequency components of the connection voltage, a passive frequency filter is provided for each phase module, having a resonant frequency above a sampling frequency of a digital regulating system connecting disconnected submodule voltages and disconnecting connected submodule voltages at successive sampling times. To avoid exciting the point of resonance of the frequency filter, the drive has a controller briefly connecting and again disconnecting at least one of the disconnected submodule voltages at least once within a sampling interval of the regulating system for a submodule voltage connected by the regulating system. A method for driving the multiphase multilevel power converter is also provided.