Patents by Inventor Richard Griessel

Richard Griessel 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: 9553526
    Abstract: In a converter for converting energy from a generator to a power network, wherein the converter comprises multiple power modules, wherein each power module includes at least two power cells and a transformer for connecting the power cells to the power network, wherein each power cell includes a phase input, a phase output, a transformer output connected to the transformer, a rectifier circuit and an inverter, the transformer (T) of a power module (4.1, . . . , 4.n) includes one generator-side winding (10) for each of the power cells (5) and exactly one common grid-side winding for balancing an energy flow through the power cells (5) of a power module (4.1, . . . , 4.n).
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: January 24, 2017
    Assignee: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Kilian Noetzold, Michael Bragard, Karsten Fink, Richard Griessel, Ralf Wegener
  • Publication number: 20140204632
    Abstract: In a converter for converting energy from a generator to a power network, wherein the converter comprises multiple power modules, wherein each power module includes at least two power cells and a transformer for connecting the power cells to the power network, wherein each power cell includes a phase input, a phase output, a transformer output connected to the transformer, a rectifier circuit and an inverter, the transformer (T) of a power module (4.1, . . . , 4.n) includes one generator-side winding (10) for each of the power cells (5) and exactly one common grid-side winding for balancing an energy flow through the power cells (5) of a power module (4.1, . . . , 4.n).
    Type: Application
    Filed: January 23, 2014
    Publication date: July 24, 2014
    Applicant: DET International Holding Limited
    Inventors: Kilian NOETZOLD, Michael BRAGARD, Karsten FINK, Richard GRIESSEL, Ralf WEGENER
  • Patent number: 6879053
    Abstract: The invention in the simplest form is an improved variable speed engine/generator set with an integrated power conditioning system and control method, used to generate high quality AC power with optimum fuel efficiency and reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of engine and generator field. The transformerless power inverter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single phase, or unbalanced loading.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: April 12, 2005
    Assignee: Youtility, Inc.
    Inventors: Richard Shaun Welches, Daniel P. Hohm, Jian Wen, Kevin E LeRow, Richard Griessel, Thomas O'Reilly
  • Publication number: 20040084965
    Abstract: The invention in the simplest form is an improved hybrid power converter with uninterruptible power supply (UPS) and power quality capabilities as well as an integrated variable speed power source and control method that is used to generate high quality, uninterruptible AC power utilizing fewer batteries and operating at optimum fuel efficiency and with reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of a power source such as an engine and generator. The transformerless hybrid power converter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single-phase or unbalanced loading. The transformerless hybrid power converter also provides inline or offline UPS capability, line voltage and/or frequency sag and surge compensation, peak shaving capability, VAR compensation and active harmonic filtering.
    Type: Application
    Filed: October 22, 2003
    Publication date: May 6, 2004
    Inventors: Richard Shaun Welches, Daniel P. Hohm, Jian Wen, Kevin E. LeRow, Richard Griessel