Patents by Inventor Michel Wursteisen

Michel Wursteisen 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).

  • Power converter device for direct current power supply to an electric arc furnace
    Patent number: 5677925
    Abstract: A power converter device for supplying direct current to an electric arc furnace comprises at least one transformer with its primary fed with a three-phase alternating current and delivering to at least one secondary a three-phase current applied to a rectifier system outputting to the load a rectified voltage and current. The rectifier system comprises controlled semiconductors for each secondary and a freewheel circuit. The controlled semiconductors are triggered with essentially variable firing angles, modified to increase the duration of conduction in the freewheel circuit whilst reducing the duration of conduction in the triggered semiconductors, and vice versa, so as to deliver to the load a substantially constant active power or reactive power despite variations in the impedance of the load.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: October 14, 1997
    Assignee: Cegelec Metals Systems
    Inventors: Jacques Du Parc, Christophe Glinski, Michel Wursteisen
  • Power converter device for direct current power supply to an electric arc furnace
    Patent number: 5463653
    Abstract: A power converter device for supplying direct current to an electric arc furnace comprises at least one transformer with its primary fed with a three-phase alternating current and delivering to at least one secondary a three-phase current applied to a rectifier system outputting to the load a rectified voltage and current. The rectifier system comprises controlled semiconductors for each secondary and a freewheel circuit. The controlled semiconductors are triggered with essentially variable firing angles, modified to increase the duration of conduction in the freewheel circuit whilst reducing the duration of conduction in the triggered semiconductors, and vice versa, so as to deliver to the load a substantially constant active power or reactive power despite variations in the impedance of the load.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: October 31, 1995
    Assignee: Cegelec Metals Systems
    Inventors: Jacques Du Parc, Christophe Glinski, Michel Wursteisen