Patents by Inventor Felix Ludwig

Felix Ludwig 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).

  • Securing assembly of bandages for synchronous motors with outer permanent magnets
    Patent number: 7365465
    Abstract: A rotor structure for an electric motor includes a cylindrical rotor core assembly and a plurality of permanent magnets disposed on an outer circumference of the rotor core assembly. Wrapped around the rotor core assembly is a bandage to secure the permanent magnets in place, wherein the bandage has a bandage edge arranged in proximity of an end surface of the rotor core assembly. In order to securely fix the bandage edge in place, a securing ring is disposed radially over the bandage edge of the bandage to hold the bandage against the rotor core assembly.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: April 29, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventor: Felix Ludwig
  • Electric machine with improved cooling feature
    Patent number: 6731028
    Abstract: An electric machine, includes a stator with a laminated stator body having winding end portions potted in a cast, and a rotor for interaction with the stator. In order to cope with the increased heat development in the zone of the winding end portions compared to the zone of the stator body, the cast of the winding end portions is formed with surface-enlarging structures in heat-conducting contact with a cooling jacket or with a cooling medium, and/or the cast is provided at least partially with a heat-conducting envelope which carries off heat.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: May 4, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Erhard Derleth, Klaus Greubel, Klaus Happel, Bruno Heim, Felix Ludwig, Thomas Niklaus, Jochen Pecher
  • Securing assembly of bandages for synchronous motors with outer permanent magnets
    Publication number: 20030193255
    Abstract: A rotor structure for an electric motor includes a cylindrical rotor core assembly and a plurality of permanent magnets disposed on an outer circumference of the rotor core assembly. Wrapped around the rotor core assembly is a bandage to secure the permanent magnets in place, wherein the bandage has a bandage edge arranged in proximity of an end surface of the rotor core assembly. In order to securely fix the bandage edge in place, a securing ring is disposed radially over the bandage edge of the bandage to hold the bandage against the rotor core assembly.
    Type: Application
    Filed: March 31, 2003
    Publication date: October 16, 2003
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Felix Ludwig
  • Electric machine with improved cooling feature
    Publication number: 20020135245
    Abstract: An electric machine, includes a stator with a laminated stator body having winding end portions potted in a cast, and a rotor for interaction with the stator. In order to cope with the increased heat development in the zone of the winding end portions compared to the zone of the stator body, the cast of the winding end portions is formed with surface-enlarging structures in heat-conducting contact with a cooling jacket or with a cooling medium, and/or the cast is provided at least partially with a heat-conducting envelope which carries off heat.
    Type: Application
    Filed: September 20, 2001
    Publication date: September 26, 2002
    Inventors: Erhard Derleth, Klaus Greubel, Klaus Happel, Bruno Heim, Felix Ludwig, Thomas Niklaus, Jochen Pecher