Patents by Inventor Peter Krafka

Peter Krafka 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: 11329483
    Abstract: A system for feeding electric power to a first consumer (1) comprises an input filter (6) with an input configured to be connected to a DC energy source and a DC intermediate link (3) connected to an output (14) of the input filter. A converter (12) is with an input connected to the DC intermediate link and has an output to be connected to said first consumer (1). The unit (16) controls the converter to obtain feeding of electric power requested by the first consumer independently of variations of the voltage on the DC link (3). An assembly is configured to act stabilizing on that voltage by controlling the converter to add a first power component to the power to be fed to the consumer. A second consumer (19) is controlled to consume a second power component to either assist the control of the converter to obtain the stabilization or alone take care thereof.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: May 10, 2022
    Assignee: Bombardier Transportation GmbH
    Inventors: Magnus Jansson, Henrik Mosskull, Peter Krafka, Daniel Wagner
  • Publication number: 20210021124
    Abstract: A system for feeding electric power to a first consumer (1) comprises an input filter (6) with an input configured to be connected to a DC energy source and a DC intermediate link (3) connected to an output (14) of the input filter. A converter (12) is with an input connected to the DC intermediate link and has an output to be connected to said first consumer (1). The unit (16) controls the converter to obtain feeding of electric power requested by the first consumer independently of variations of the voltage on the DC link (3). An assembly is configured to act stabilizing on that voltage by controlling the converter to add a first power component to the power to be fed to the consumer. A second consumer (19) is controlled to consume a second power component to either assist the control of the converter to obtain the stabilization or alone take care thereof.
    Type: Application
    Filed: March 13, 2019
    Publication date: January 21, 2021
    Inventors: Magnus JANSSON, Henrik MOSSKULL, Peter KRAFKA, Daniel WAGNER
  • Publication number: 20120081065
    Abstract: A method and a structure operate a three-phase machine, which is fed by a three-phase converter, using a stator flux regulator and either a slip frequency regulator or a torque regulator. A torque-forming fundamental-frequency current component of the stator current is limited by limiting a setpoint value that is supplied to the slip frequency regulator or to the torque regulator to a maximum slip frequency value maximum torque value. The flux-forming fundamental-frequency current component of the stator current is limited by limiting the speed at which a setpoint value supplied to the stator flux regulator changes to a maximum value. The maximum slip frequency value or maximum torque value is calculated on the basis of a prescribed maximum current value for a stator current fundamental-frequency magnitude of the stator current and on the basis of a filtered actual value of the flux-forming fundamental-frequency current component of the stator current.
    Type: Application
    Filed: November 18, 2011
    Publication date: April 5, 2012
    Applicant: BOMBARDIER TRANSPORTATION GMBH
    Inventors: PETER KRAFKA, MICHAEL RAMPE
  • Patent number: 8129936
    Abstract: An open-loop and/or closed-loop control device for operating an asynchronous machine which is fed by a 3-phase power converter. The open-loop and/or closed-loop control structure has a stator flux controller and a pulse pattern generator for generating pulse signals based on mean values. An output of the stator flux controller is connected to an input of the pulse pattern generator, with the result that the pulse pattern generator can generate the pulse signals as a function of a manipulated variable which is generated by the stator flux controller. The stator flux controller is configured so as to generate the manipulated variable as a function of a desired value of the stator flux of the asynchronous machine and as a function of a desired value of the torque of the asynchronous machine. The stator flux controller has a dead-beat control response.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: March 6, 2012
    Assignee: Bombardier Transportation GmbH
    Inventors: Robert Becker, Peter Krafka, Michael Rampe
  • Publication number: 20100079104
    Abstract: An open-loop and/or closed-loop control device for operating an asynchronous machine which is fed by a 3-phase power converter. The open-loop and/or closed-loop control structure has a stator flux controller and a pulse pattern generator for generating pulse signals based on mean values. An output of the stator flux controller is connected to an input of the pulse pattern generator, with the result that the pulse pattern generator can generate the pulse signals as a function of a manipulated variable which is generated by the stator flux controller. The stator flux controller is configured so as to generate the manipulated variable as a function of a desired value of the stator flux of the asynchronous machine and as a function of a desired value of the torque of the asynchronous machine. The stator flux controller has a dead-beat control response.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 1, 2010
    Applicant: BOMBARDIER TRANSPORTATION GMBH
    Inventors: Robert Becker, Peter Krafka, Michael Rampe