Patents by Inventor Bertil Svensson

Bertil Svensson 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).

  • Electric machine
    Patent number: 7498775
    Abstract: A method and an apparatus are described for monitoring a rotating synchronous electric machine (9), which comprises a rotor having a rotor winding and a stator having a stator winding. The method comprises the steps of determining the stator winding current, determining the stator winding voltage, determining the rotor winding current, and estimating the temperature in at least two positions in the electric machine (9) using a model of the electric machine and the determined current and voltage values. An apparatus according to the invention is provided for carrying out the method.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: March 3, 2009
    Assignee: E.On Sverige AB
    Inventors: H{dot over (a)}kan Swahn, Bertil Svensson
  • Electric machine
    Publication number: 20080010036
    Abstract: A method and an apparatus are described for monitoring a rotating synchronous electric machine (9), which comprises a rotor having a rotor winding and a stator having a stator winding. The method comprises the steps of determining the stator winding current, determining the stator winding voltage, determining the rotor winding current, and estimating the temperature in at least two positions in the electric machine (9) using a model of the electric machine and the determined current and voltage values. An apparatus according to the invention is provided for carrying out the method.
    Type: Application
    Filed: May 7, 2007
    Publication date: January 10, 2008
    Inventors: Hakan Swahn, Bertil Svensson
  • Electric machine
    Patent number: 7242166
    Abstract: A method and an apparatus are described for monitoring a rotating synchronous electric machine (9), which comprises a rotor winding and a stator having a stator winding. The method comprises the steps of determining the stator winding current, determining the stator winding voltage, determining the rotor winding current, and estimating the temperature in at least two positions in the electric machine (9) using a model of the electric machine and the determined current and voltage values. An apparatus according to the invention is provided for carrying out the method.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: July 10, 2007
    Assignee: Sydkraft AB
    Inventors: Håkan Swahn, Bertil Svensson
  • Electric machine
    Publication number: 20060038539
    Abstract: A method and an apparatus are described for monitoring a rotating synchronous electric machine (9), which comprises a rotor winding and a stator having a stator winding. The method comprises the steps of determining the stator winding current, determining the stator winding voltage, determining the rotor winding current, and estimating the temperature in at least two positions in the electric machine (9) using a model of the electric machine and the determined current and voltage values. An apparatus according to the invention is provided for carrying out the method.
    Type: Application
    Filed: July 21, 2003
    Publication date: February 23, 2006
    Inventors: Hakan Swahn, Bertil Svensson