Patents by Inventor Lars Hedendahl

Lars Hedendahl 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).

  • Rotating electrical machine
    Patent number: 7141908
    Abstract: In a rotating electrical machine a stator winding is formed of flexible cables inserted in an open stator in the stator core. The stator slots extend from a radially outermost yoke part of the stator core radially inwards towards the rotor, the stator slots being separated by teeth. The stator slots are shaped as double slots with shoulders arranged in the slot walls such that each cable in the winding is secured between the previous cable in the stator slot and, seen from the slot opening, the next shoulder situated outside that particular cable. In a method for manufacturing such a winding the first cable is inserted through the opening of the stator slot and pressed firmly into a cable slot arranged at the bottom of the stator slot and designed to retain the cable when it has been pressed in.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: November 28, 2006
    Assignee: ABB AB
    Inventors: Goran Holmstrom, Lars Hedendahl, Lars Walfridsson
  • Rotating electrical machine
    Publication number: 20050029889
    Abstract: In a rotating electrical machine a stator winding is formed of flexible cables inserted in an open stator in the stator core. The stator slots extend from a radially outermost yoke part of the stator core radially inwards towards the rotor, the stator slots being separated by teeth. The stator slots are shaped as double slots with shoulders arranged in the slot walls such that each cable in the winding is secured between the previous cable in the stator slot and, seen from the slot opening, the next shoulder situated outside that particular cable. In a method for manufacturing such a winding the first cable is inserted through the opening of the stator slot and pressed firmly into a cable slot arranged at the bottom of the stator slot and designed to retain the cable when it has been pressed in.
    Type: Application
    Filed: March 1, 2001
    Publication date: February 10, 2005
    Inventors: Goran Holmstrom, Lars Hedendahl, Lars Walfridsson