Patents by Inventor Kristian Holm-Joergensen

Kristian Holm-Joergensen 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).

  • Damping wind turbine tower oscillations using gyroscopic forces
    Patent number: 9347431
    Abstract: A method and a control device for damping an oscillatory movement of the top of a tower of a wind turbine are provided. The described method includes (a) rotating a rotor being rotatably attached to a nacelle of the wind turbine with a rotational speed, and (b) yawing the nacelle of the wind turbine around an axis being aligned with the longitudinal axis of the tower with a yawing speed. Thereby, a yawing movement being associated with yawing the nacelle is coordinated with the oscillatory movement in such a manner that a gyroscopic torque resulting (i) from rotating the rotor and (ii) from yawing the rotor damps the oscillatory movement of the top of the tower. A wind turbine comprising such a control device and a computer program for controlling this method are also provided.
    Type: Grant
    Filed: March 15, 2014
    Date of Patent: May 24, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Esbensen, Gustav Hoegh, Kristian Holm-Joergensen
  • DAMPING WIND TURBINE TOWER OSCILLATIONS USING GYROSCOPIC FORCES
    Publication number: 20140339827
    Abstract: A method and a control device for damping an oscillatory movement of the top of a tower of a wind turbine are provided. The described method includes (a) rotating a rotor being rotatably attached to a nacelle of the wind turbine with a rotational speed, and (b) yawing the nacelle of the wind turbine around an axis being aligned with the longitudinal axis of the tower with a yawing speed. Thereby, a yawing movement being associated with yawing the nacelle is coordinated with the oscillatory movement in such a manner that a gyroscopic torque resulting (i) from rotating the rotor and (ii) from yawing the rotor damps the oscillatory movement of the top of the tower. A wind turbine comprising such a control device and a computer program for controlling this method are also provided.
    Type: Application
    Filed: March 15, 2014
    Publication date: November 20, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thomas Esbensen, Gustav Hoegh, Kristian Holm-Joergensen