Patents by Inventor Kai A. Rothenhagen

Kai A. Rothenhagen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods of Operating Doubly-Fed Induction Generator Systems
    Publication number: 20220231622
    Abstract: A doubly-fed induction generator (DFIG) system (100) is described. The DFIG system (100) includes an induction electric machine (102) including a stator having a stator winding and a rotor having a rotor winding. The stator winding is electrically connected to at least one output terminal (108) and the rotor winding is electrically connected to the at least one output terminal (108) by means of a power converter. The power converter includes a first active rectifier/inverter (130a) with alternating current AC terminals electrically connected to the rotor winding, and direct current DC terminals, and a second active rectifier/inverter (136a) with DC terminals electrically connected to the DC terminals of the first active rectifier/inverter by a DC link (138a), and AC terminals electrically connected to the at least one output terminal (108).
    Type: Application
    Filed: June 5, 2020
    Publication date: July 21, 2022
    Applicant: GE Energy Power Conversion Technology Limited
    Inventors: Kai A. Rothenhagen, Aurelie Bocquel