Patents by Inventor Tobias Geyer

Tobias Geyer 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).

  • METHOD FOR CONTROLLING HARMONICS AND RESONANCES IN AN INVERTER
    Publication number: 20140126252
    Abstract: In a method based on the MPDTC algorithm for controlling an inverter of an electrical system, the harmonics and resonances in the inverter can be damped by extracting frequency information from predicted data of the MPDTC algorithm and by damping harmonic distortion of the electrical system by reintroducing the extracted frequency information into a control loop of the inverter.
    Type: Application
    Filed: January 15, 2014
    Publication date: May 8, 2014
    Applicant: ABB RESEARCH LTD
    Inventors: Tobias GEYER, Georgios PAPAFOTIOU, Silvia MASTELLONE
  • METHOD FOR CONTROLLING AN ELECTRICAL CONVERTER
    Publication number: 20130016549
    Abstract: A method is provided for predicting pulse width modulated switching sequences for a multi-phase multi-level converter. With a first predicted switching sequence, due to multi-phase redundancies, equivalent switching sequences are determined. From the equivalent switching sequences, one switching sequence optimal with respect to a predefined optimization goal is selected. The selected switching sequence is used to switch the converter.
    Type: Application
    Filed: July 25, 2012
    Publication date: January 17, 2013
    Applicant: ABB RESEARCH LTD.
    Inventors: Frederick KIEFERNDORF, Georgios Papafotiou, Nikolaos Oikonomou, Tobias Geyer
  • METHOD FOR CONTROLLING A CONVERTER
    Publication number: 20120161685
    Abstract: Exemplary embodiments are directed to a converter for an electrical system that is controlled in such that switching sequences for the converter, determined with respect to an optimization goal are modified such that by correcting a flux error resulting from assumptions on which the first optimization of the switching sequence is based.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 28, 2012
    Applicant: ABB RESEARCH LTD
    Inventors: Tobias GEYER, Frederick KIEFERNDORF, Georgios PAPAFOTIOU, Nikolaos OIKONOMOU
  • CONTROLLER FOR A ROTATING ELECTRICAL MACHINE
    Publication number: 20110181225
    Abstract: To minimize switching losses in a rotating electrical machine, exemplary embodiments of the present disclosure proposes an iterative control method which calculates optimal switching states in advance. A rotating electrical machine can be controlled on the basis of this iterative control method.
    Type: Application
    Filed: January 21, 2011
    Publication date: July 28, 2011
    Applicant: ABB RESEARCH LTD.
    Inventor: Tobias GEYER
  • Method for operating a rotating electrical machine
    Patent number: 7256561
    Abstract: A method is specified for operating a rotating electrical machine, in which the rotating electrical machine is connected in terms of phase to a converter circuit, having a DC voltage circuit, for connecting at least two voltage levels, and the phases of the converter circuit are connected to the DC voltage circuit in accordance with a selected switching state combination of switching states for power semiconductor switches in the converter circuit.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: August 14, 2007
    Assignees: ABB Research Ltd, Eidgenossische Technische Hochschule Zurich
    Inventors: Tobias Geyer, Georgios Papafotiou, Manfred Morari
  • Method for operating a rotating electrical machine
    Publication number: 20060125435
    Abstract: A method is specified for operating a rotating electrical machine, in which the rotating electrical machine is connected in terms of phase to a converter circuit, having a DC voltage circuit, for connecting at least two voltage levels, and the phases of the converter circuit are connected to the DC voltage circuit in accordance with a selected switching state combination of switching states for power semiconductor switches in the converter circuit.
    Type: Application
    Filed: December 7, 2005
    Publication date: June 15, 2006
    Applicants: ABB Research Ltd, Eidgenossische Technische Hochschule Zurich
    Inventors: Tobias Geyer, Georgios Papafotiou, Manfred Morari