Patents by Inventor Friedhelm Pholmann

Friedhelm Pholmann 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).

  • External corona shielding for an electrical machine
    Patent number: 9543800
    Abstract: An external corona shielding for a conductor bar of an electric machine, a main insulating layer sheath on the conductor bar. The shielding has a first ply, which sheaths the main insulating layer, and a second ply, which sheaths the first ply. Each ply is a conductive, impregnatable layer with a sliding layer, wherein the sliding layers of the two plies (20, 21) face one another. Each sliding layer has at least one cutout, wherein the two conductive layers are connected to one another through these cutouts with the aid of a permanently elastic, electrically conductive connection.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: January 10, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pholmann, Guido Schmidt, Christian Staubach
  • EXTERNAL CORONA SHIELDING FOR AN ELECTRICAL MACHINE
    Publication number: 20140246941
    Abstract: An external corona shielding for a conductor bar of an electric machine, a main insulating layer sheath on the conductor bar. The shielding has a first ply, which sheaths the main insulating layer, and a second ply, which sheaths the first ply. Each ply is a conductive, impregnatable layer with a sliding layer, wherein the sliding layers of the two plies (20, 21) face one another. Each sliding layer has at least one cutout, wherein the two conductive layers are connected to one another through these cutouts with the aid of a permanently elastic, electrically conductive connection.
    Type: Application
    Filed: September 26, 2012
    Publication date: September 4, 2014
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pholmann, Guido Schmidt, Christian Staubach