Patents by Inventor Louis W. Herchenroeder

Louis W. Herchenroeder 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).

  • Two-quadrant operation system for a slip-recovery drive
    Patent number: 4385268
    Abstract: SCR devices replace the usual diodes of the rectifier bridge section of a wound-rotor slip-recovery system motor drive, and by selection of the retardation angle of the SCR's between either zero or close to 180.degree., two-quadrant operation is made possible, which includes reverse torque and reverse rotation, while controlling the retardation angle of the power line bridge of SCR's.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: May 24, 1983
    Assignee: Westinghouse Electric Corp.
    Inventors: Roger B. Herbert, Louis W. Herchenroeder
  • Controlled rotor rectifier arrangement for a slip-recovery drive
    Patent number: 4385267
    Abstract: SCR devices replace the usual diodes of the rectifier bridge section of a wound-rotor slip-recovery system motor drive. By controlling the retardation angle of the SCR devices while controlling the line bridge for acceleration from zero speed to normal speed, the rating of the overall system is reduced. By removing the gating signal of the SCR's while operating at a retardation angle in the range between zero and 90.degree., operation is immediately brought to a stop in case of an emergency.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: May 24, 1983
    Assignee: Westinghouse Electric Corp.
    Inventors: Roger B. Herbert, Alan F. Wilkinson, Louis W. Herchenroeder