Patents by Inventor Siegfried Nowak

Siegfried Nowak 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).

  • Patent number: 9746513
    Abstract: A thyristor circuit comprising at least one series circuit in which two or more thyristors are connected in series. Each thyristor is parallel-connected to an RC member. A control device can energize the thyristors individually and independently of each other by a control signal, so that each thyristor can be individually switched into its conducting condition. During a test sequence, the thyristors are switched successively into their conducting condition, wherein, in a series circuit and/or in the thyristor circuit, respectively only one thyristor is in its conducting condition. While a thyristor is conducting, the capacitor of the associate RC member discharges and produces a thyristor current. As a result, the conducting condition is maintained until the thyristor current falls below the holding current. The control device can use the thyristor voltage and/or the thyristor current to evaluate the function or the switching behavior of the thyristor.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: August 29, 2017
    Assignee: GE ENERGY POWER COVERSION GMBH
    Inventors: Martin Geske, Robert Oesterle, Siegfried Nowak
  • Publication number: 20150309108
    Abstract: A thyristor circuit comprising at least one series circuit in which two or more thyristors are connected in series. Each thyristor is parallel-connected to an RC member. A control device can energize the thyristors individually and independently of each other by a control signal, so that each thyristor can be individually switched into its conducting condition. During a test sequence, the thyristors are switched successively into their conducting condition, wherein, in a series circuit and/or in the thyristor circuit, respectively only one thyristor is in its conducting condition. While a thyristor is conducting, the capacitor of the associate RC member discharges and produces a thyristor current. As a result, the conducting condition is maintained until the thyristor current falls below the holding current. The control device can use the thyristor voltage and/or the thyristor current to evaluate the function or the switching behavior of the thyristor.
    Type: Application
    Filed: April 22, 2015
    Publication date: October 29, 2015
    Inventors: Martin GESKE, Robert OESTERLE, Siegfried NOWAK
  • Patent number: 9124119
    Abstract: A system for generating electrical power is described. In at least one embodiment, the system includes a turbine that is mechanically connected to a generator, wherein the generator is electrically connected via a first converter to a load. The first converter generates a first output current. A second output current is generated by a second converter and is added to the first output current. The second output current is generated such that an actual current over the load follows a desired current.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: September 1, 2015
    Assignee: GE Energy Power Conversion Technology Limited
    Inventors: Georg Moehlenkamp, Siegfried Nowak
  • Publication number: 20120032532
    Abstract: A system for generating electrical power is described. In at least one embodiment, the system includes a turbine that is mechanically connected to a generator, wherein the generator is electrically connected via a first converter to a load. The first converter generates a first output current. A second output current is generated by a second converter and is added to the first output current. The second output current is generated such that an actual current over the load follows a desired current.
    Type: Application
    Filed: March 1, 2011
    Publication date: February 9, 2012
    Applicant: Converteam Technology Ltd.
    Inventors: Georg Moehlenkamp, Siegfried Nowak