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:
Feb. 18, 2014
Filed:
May. 19, 2011
Stephan Engelhardt, Sonsbeck, DE;
Joerg Kretschmann, Kempen, DE;
Stephan Engelhardt, Sonsbeck, DE;
Joerg Kretschmann, Kempen, DE;
Woodward Kempen GmbH, Kempen, DE;
Abstract
The invention relates to a device and method for controlling a double-fed asynchronous machine (), preferably for a power plant, in particular for a wind or water power plant. The device includes an indirect converter () which is connected on the rotor side to the double-fed asynchronous machine (). The indirect converter () includes a rotor-side converter () and a line-side converter (). At least one control element () is provided for controlling the indirect converter (). At least one software-based and/or hardware-based damping element () is provided which has changeable damping characteristics.