Patents by Inventor Silvana Arsova

Silvana Arsova 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).

  • Sensorless measurement of the rotation frequency of a rotor of an asynchronous machine
    Patent number: 7911170
    Abstract: The present invention relates to a device (20) and a method for sensorless measuring a mechanical rotor frequency of a rotor (6) of an asynchronous machine (40), wherein the rotor (6) has a predetermined defect and the asynchronous machine (40) has a fixed number of pairs of poles. The asynchronous machine (40) comprises a current determination unit (2) for determining a stator current of the stator (7), wherein the stator current has a stator frequency. A processing unit (3) forms a stator current spectrum of the stator current. An analyzing unit (4) analyzes the stator current spectrum and determines an inverse peak (26) and a corresponding inverse frequency in the stator current spectrum, wherein the inverse peak (26) is the peak having the second highest amplitude in the stator current spectrum in the frequency range of the stator frequency.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: March 22, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Stefan Hauttmann, Silvana Arsova
  • SENSORLESS MEASUREMENT OF THE ROTATION FREQUENCY OF A ROTOR OF AN ASYNCHRONOUS MACHINE
    Publication number: 20090140681
    Abstract: The present invention relates to a device (20) and a method for sensorless measuring a mechanical rotor frequency of a rotor (6) of an asynchronous machine (40), wherein the rotor (6) has a predetermined defect and the asynchronous machine (40) has a fixed number of pairs of poles. The asynchronous machine (40) comprises a current determination unit (2) for determining a stator current of the stator (7), wherein the stator current has a stator frequency. A processing unit (3) forms a stator current spectrum of the stator current. An analyzing unit (4) analyzes the stator current spectrum and determines an inverse peak (26) and a corresponding inverse frequency in the stator current spectrum, wherein the inverse peak (26) is the peak having the second highest amplitude in the stator current spectrum in the frequency range of the stator frequency.
    Type: Application
    Filed: June 6, 2006
    Publication date: June 4, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Stefan Hauttmann, Silvana Arsova