Patents by Inventor Stefan Kempen

Stefan Kempen 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: 10326274
    Abstract: An arrangement for receiving electrical energy from a power grid and for discharging electrical energy to the power grid comprises: a converter to convert from AC to DC and vice versa and a control device. The converter includes: a power unit connected on one side to a DC I/O and on another side to an AC I/O; an energy storage device; an energy-converter; and a changeover mechanism to which the energy storage device or the energy-converter is connected via the DC I/O. The control device controls the changeover mechanism such that a neutral state is a state of charge of the energy storage device between 50% and 100%; and at or above the neutral state, the changeover mechanism connects the DC I/O of the converter to the energy-converter at a network frequency higher than a nominal network frequency plus a predetermined, non-zero amount.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: June 18, 2019
    Assignee: AEG Power Solutions GmbH
    Inventors: Stefan Kempen, Andreas Becker, Dieter Brandt
  • Publication number: 20190131842
    Abstract: The corona shield can be applied in electric machines in a faster manner by using radiation-cured materials.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 2, 2019
    Inventors: Mario BROCKSCHMIDT, Stefan KEMPEN, Friedhelm POHLMANN, Guido SCHMIDT
  • Patent number: 10186924
    Abstract: The corona shield can be applied in electric machines in a faster manner by using radiation-cured materials.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: January 22, 2019
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pohlmann, Guido Schmidt
  • Publication number: 20180083448
    Abstract: An arrangement for receiving electrical energy from a power grid and for discharging electrical energy to the power grid comprises: a converter to convert from AC to DC and vice versa and a control device. The converter includes: a power unit connected on one side to a DC I/O and on another side to an AC I/O; an energy storage device; an energy-converter; and a changeover mechanism to which the energy storage device or the energy-converter is connected via the DC I/O. The control device controls the changeover mechanism such that a neutral state is a state of charge of the energy storage device between 50% and 100%; and at or above the neutral state, the changeover mechanism connects the DC I/O of the converter to the energy-converter at a network frequency higher than a nominal network frequency plus a predetermined, non-zero amount.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 22, 2018
    Inventors: Stefan KEMPEN, Andreas BECKER, Dieter BRANDT
  • Patent number: 9543800
    Abstract: An external corona shielding for a conductor bar of an electric machine, a main insulating layer sheath on the conductor bar. The shielding has a first ply, which sheaths the main insulating layer, and a second ply, which sheaths the first ply. Each ply is a conductive, impregnatable layer with a sliding layer, wherein the sliding layers of the two plies (20, 21) face one another. Each sliding layer has at least one cutout, wherein the two conductive layers are connected to one another through these cutouts with the aid of a permanently elastic, electrically conductive connection.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: January 10, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pholmann, Guido Schmidt, Christian Staubach
  • Patent number: 9396837
    Abstract: An electrical conduction device is provided having an electrically conductive conduction element and an electrically insulating sheathing surrounding said conduction element at least in regions. An overhang corona shielding in the form of a coating composed of a material having a resistivity that increases towards an end of the sheathing is arranged on the sheathing at an outer side. An overhang corona shielding arrangement and a method for producing an overhang corona shielding are also provided.
    Type: Grant
    Filed: September 3, 2012
    Date of Patent: July 19, 2016
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Kempen, Steffen Lang
  • Publication number: 20150042195
    Abstract: A corona shield material (22) for producing a corona shield protective layer (16, 17) for an electric machine (1). The corona shield material (22) contains an initially flowable matrix material (22) which can be cured in a curing reaction to form a solid. The corona shield material (22) further contains a photosensitive initiator (24) which can be transformed by electromagnetic radiation (25) into a reactive state triggering the curing reaction. The corona shield material (22) further contains at least one electrically conductive filler (25) in particulate form.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 12, 2015
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pohlmann, Guido Schmidt
  • Publication number: 20140345907
    Abstract: An electrical conduction device is provided having an electrically conductive conduction element and an electrically insulating sheathing surrounding said conduction element at least in regions. An overhang corona shielding in the form of a coating composed of a material having a resistivity that increases towards an end of the sheathing is arranged on the sheathing at an outer side. An overhang corona shielding arrangement and a method for producing an overhang corona shielding are also provided.
    Type: Application
    Filed: September 3, 2012
    Publication date: November 27, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Stefan Kempen, Steffen Lang
  • Publication number: 20140327334
    Abstract: The corona shield can be applied in electric machines in a faster manner by using radiation-cured materials.
    Type: Application
    Filed: December 15, 2011
    Publication date: November 6, 2014
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pohlmann, Guido Schmidt
  • Publication number: 20140246941
    Abstract: An external corona shielding for a conductor bar of an electric machine, a main insulating layer sheath on the conductor bar. The shielding has a first ply, which sheaths the main insulating layer, and a second ply, which sheaths the first ply. Each ply is a conductive, impregnatable layer with a sliding layer, wherein the sliding layers of the two plies (20, 21) face one another. Each sliding layer has at least one cutout, wherein the two conductive layers are connected to one another through these cutouts with the aid of a permanently elastic, electrically conductive connection.
    Type: Application
    Filed: September 26, 2012
    Publication date: September 4, 2014
    Inventors: Mario Brockschmidt, Stefan Kempen, Friedhelm Pholmann, Guido Schmidt, Christian Staubach
  • Publication number: 20140083592
    Abstract: A method for producing an electrical insulation system of a conductor of a winding head of an electric machine is provided. The method includes applying a porous main insulation paper to the conductor of the electrical machine; applying a porous overhang corona shielding paper to the main insulation paper, as a result of which an insulation blank of the insulation system is formed; impregnating the insulation blank with a base resin, wherein the overhang corona shielding paper and the main insulation paper have a porosity such that the insulation blank is impregnated by the base resin to form a homogeneous base resin matrix; and completing the insulation system by curing the base resin.
    Type: Application
    Filed: April 24, 2012
    Publication date: March 27, 2014
    Applicants: VOITH PATENT GMBH, SIEMENS AKTIENGESELLSCHAFT
    Inventors: Peter Gröppel, Thomas Hildinger, Stefan Kempen, Steffen Lang, Friedhelm Pohlmann
  • Publication number: 20140042818
    Abstract: A photovoltaic power plant with photovoltaic modules (1) for generating electric power. The modules (1) are connected together into a plurality of strands (2). A first central converter (5) for converting electrical energy generated by the photovoltaic modules into electrical energy with a voltage having a voltage waveform that corresponds to a voltage waveform of a voltage in a utility grid, and with an output for feeding the converted current into the utility grid, wherein the first central converter (5) has at least one electric motor (51) and a synchronous generator (52) whose shafts are coupled to one another.
    Type: Application
    Filed: January 18, 2013
    Publication date: February 13, 2014
    Applicant: AEG POWER SOLUTIONS B.V.
    Inventors: Norbert Blacha, Stefan Kempen