Patents by Inventor Wilhelm Korb

Wilhelm Korb 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).

  • Device and method for line-voltage dependent thyristor controlled pre-charging of output capacitors in a three-level pulse rectifier system
    Patent number: 6377482
    Abstract: The invention relates to an apparatus for initial charging of the output capacitors of a three-phase three-point pulsed rectifier system. According to the invention, a thyristor is arranged in each phase between the input terminal and is connected in the current flow direction to the anode of the freewheeling diode, and an initial charging path is connected in parallel with this thyristor. The circuit for actuating the thyristor is activated after completion of the initial charging; the reference voltage is applied to the negative input of the comparator.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: April 23, 2002
    Assignee: Ascom Energy Systems AG
    Inventors: Johann W. Kolar, Wilhelm Korb