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:
Aug. 14, 2012
Filed:
May. 30, 2007
Stephan Engelhardt, Sonsbeck, DE;
Andrzej Geniusz, Kempen, DE;
Stephan Engelhardt, Sonsbeck, DE;
Andrzej Geniusz, Kempen, DE;
Woodward SEG GmbH & Co KG, Kempen, DE;
Abstract
In a method and an apparatus for controlling the output or drawn active and reactive power of a double-fed asynchronous machine (), the maintenance of a maximum permissible current () of the machine—without the use of a subordinate current controller—is ensured by virtue of the fact that, during the operation of the double-fed asynchronous machine, a maximum permissible desired value for the active power () to be output or to be drawn and a maximum permissible desired value for the reactive power () to be output or to be drawn are calculated with the aid of a model of the asynchronous machine from the maximum permissible current (), preferably corrected at least using the actual value of the current to be limited of the machine, in such a way that the maximum permissible current () is not exceeded. The predetermined active and reactive power desired values are then limited to the calculated maximum permissible values.