Patents by Inventor Bo Heftholm Christensen

Bo Heftholm Christensen 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).

  • Shadow control of wind turbines
    Patent number: 8310075
    Abstract: A rotor of a wind turbine may cast an intermittent shadow onto an object in the vicinity of the turbine. A shadow-control system stops the wind turbine, based on a shadow-related shut-down condition. The condition is based on a result of a comparison between a direct-light intensity and an indirect-light intensity being beyond a direct-to-indirect light threshold. A set of light sensors measures the direct- and indirect-light intensities. A sensor measures the direct light intensity when irradiated by the sun, and the indirect-light intensity when not irradiated by the sun. The set of light sensors to provide the measured direct- and indirect-light intensities for the comparison consists of two sensors, an eastward-oriented sensor and a westward-oriented sensor.
    Type: Grant
    Filed: September 3, 2007
    Date of Patent: November 13, 2012
    Assignee: Vestas Wind Systems A/S
    Inventors: Lindy B. Sorensen, Bo Heftholm Christensen, Bruno Lund Mathiasen
  • Shadow Control of Wind Turbines
    Publication number: 20110204629
    Abstract: A rotor of a wind turbine may cast an intermittent shadow onto an object in the vicinity of the turbine. A shadow-control system stops the wind turbine, based on a shadow-related shut-down condition. The condition is based on a result of a comparison between a direct-light intensity and an indirect-light intensity being beyond a direct-to-indirect light threshold. A set of light sensors measures the direct- and indirect-light intensities. A sensor measures the direct light intensity when irradiated by the sun, and the indirect-light intensity when not irradiated by the sun. The set of light sensors to provide the measured direct- and indirect-light intensities for the comparison consists of two sensors, an eastward-oriented sensor and a westward-oriented sensor.
    Type: Application
    Filed: September 3, 2007
    Publication date: August 25, 2011
    Inventors: Lindy B. Sorensen, Bo Heftholm Christensen, Bruno Lund Mathiasen