Patents by Inventor Carsten Frager

Carsten Frager 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).

  • Stator for an electrical induction machine, especially a synchronous machine
    Patent number: 7045925
    Abstract: A stator for an electric rotating-field induction generator that is much simpler to produce, especially regarding its windings, includes main and auxiliary poles projecting inward pressed or otherwise disposed radially onto the inner side of a yoke and positioned alternately about the circumference, of which the auxiliary poles are not wound, and the main poles are each surrounded by a coil. Each of the wound poles has a groove in the direction of the longitudinal side parallel to the axis along its longitudinal sides to accept coil sections, and these grooves include a trapezoidal cross-section and are enclosed by the non-wound auxiliary poles at the longitudinal-side groove opening.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: May 16, 2006
    Assignee: Lenze Drive Systems GmbH
    Inventors: Carsten Fräger, Sven Hilfert, Matthias Müller, Edmund Neumann
  • Stator for an electrical induction machine, especially a synchronous machine
    Publication number: 20040119368
    Abstract: A stator for an electric rotating-field induction generator that is much simpler to produce, especially regarding its windings, includes main and auxiliary poles projecting inward pressed or otherwise disposed radially onto the inner side of a yoke and positioned alternately about the circumference, of which the auxiliary poles are not wound, and the main poles are each surrounded by a coil. Each of the wound poles has a groove in the direction of the longitudinal side parallel to the axis along its longitudinal sides to accept coil sections, and these grooves include a trapezoidal cross-section and are enclosed by the non-wound auxiliary poles at the longitudinal-side groove opening.
    Type: Application
    Filed: October 17, 2003
    Publication date: June 24, 2004
    Inventors: Carsten Frager, Sven Hilfert, Matthias Muller, Edmund Neumann