Patents by Inventor Andrej Krivda

Andrej Krivda 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: 11070036
    Abstract: A multi-phase busbar for conducting electric energy includes: a base layer of an insulating material; a first conducting layer of a sheet metal; a first insulating layer of an insulating material arranged on the first conducting layer; a second conducting layer of a sheet metal arranged on the insulating layer; and a second layer of an electrically insulating material which is arranged on the second conducting layer. The first and/or second insulating layers include spacers, each spacer including a layer of a rigid insulating material. At least one of the spacers is glued to an electrically insulating coating of the first and/or second conducting layer, and/or at least one of the spacers is glued to an electrically conductive surface of an uncoated first and/or second conducting layer by an adhesive.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: July 20, 2021
    Assignee: ABB SCHWEIZ AG
    Inventors: Rudi Velthuis, Andrej Krivda, Jens Rocks
  • Patent number: 10790643
    Abstract: A multi-phase busbar for conducting electric energy includes: an insulating base layer made of an insulating material; a first conducting layer made of a sheet metal arranged on and adhesively bonded to the base layer; a first connecting pin mounted to the first conducting layer which extends in a direction with respect to the first conducting layer; a first insulating layer arranged on and adhesively bonded to the first conducting layer; a second conducting layer made of a sheet metal arranged on and adhesively bonded to the first insulating layer, the second conducting layer including a second connecting pin which extends in a direction parallel to the first connecting pin; and a second insulating layer arranged on and adhesively bonded to the second conducting layer. The second conducting layer and the first and second insulating layer each include at least one pinhole through which the first connecting pin projects.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: September 29, 2020
    Assignee: ABB SCHWEIZ AG
    Inventors: Rudi Velthuis, Andrej Krivda
  • Patent number: 10662323
    Abstract: The present invention relates to a polymer composition suitable for the manufacture of an electrical insulation layer for cables having superior mechanical and electrical properties and being environmentally friendly, to a cable comprising said polymer composition as well as to the use of the polymer composition as an electrical insulation layer in cables.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: May 26, 2020
    Assignee: NKT HV CABLES AB
    Inventors: Chau-Hon Ho, Cherif Ghoul, Gustavo Dominguez, Anneli Jedenmalm, Andreas Friberg, Andrej Krivda, Lei Xie, Andreas Farkas
  • Patent number: 10559399
    Abstract: A multi-phase busbar can include a first conducting layer, a first conducting pin, a first insulating layer, and a second conducting layer. The first conducting layer can include a sheet metal coated with an electrically insulating material. The first conducting pin can be mounted to the first conducting layer. The first conducting pin can extend in a direction perpendicular to the first conducting layer. The first insulating layer of a rigid insulating material can be arranged on the first conducting layer. The first insulating layer can define an opening through which the first conducting pin projects. The second conducting layer can include a sheet metal coated with an electrically insulating material, the second conducting layer comprising a first pinhole through which the first conducting pin projects and a second conducting pin which extends in a direction parallel to the first conducting pin.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: February 11, 2020
    Assignee: ABB Schweiz AG
    Inventors: Rudi Velthuis, Andrej Krivda, Jens Rocks
  • Publication number: 20190305447
    Abstract: A multi-phase busbar for conducting electric energy includes: an insulating base layer made of an insulating material; a first conducting layer made of a sheet metal arranged on and adhesively bonded to the base layer; a first connecting pin mounted to the first conducting layer which extends in a direction with respect to the first conducting layer; a first insulating layer arranged on and adhesively bonded to the first conducting layer; a second conducting layer made of a sheet metal arranged on and adhesively bonded to the first insulating layer, the second conducting layer including a second connecting pin which extends in a direction parallel to the first connecting pin; and a second insulating layer arranged on and adhesively bonded to the second conducting layer. The second conducting layer and the first and second insulating layer each include at least one pinhole through which the first connecting pin projects.
    Type: Application
    Filed: June 18, 2019
    Publication date: October 3, 2019
    Inventors: Rudi Velthuis, Andrej Krivda
  • Publication number: 20190304621
    Abstract: A multi-phase busbar can include a first conducting layer, a first conducting pin, a first insulating layer, and a second conducting layer. The first conducting layer can include a sheet metal coated with an electrically insulating material. The first conducting pin can be mounted to the first conducting layer. The first conducting pin can extend in a direction perpendicular to the first conducting layer. The first insulating layer of a rigid insulating material can be arranged on the first conducting layer. The first insulating layer can define an opening through which the first conducting pin projects. The second conducting layer can include a sheet metal coated with an electrically insulating material, the second conducting layer comprising a first pinhole through which the first conducting pin projects and a second conducting pin which extends in a direction parallel to the first conducting pin.
    Type: Application
    Filed: June 19, 2019
    Publication date: October 3, 2019
    Inventors: Rudi Velthuis, Andrej Krivda, Jens Rocks
  • Publication number: 20190305526
    Abstract: A multi-phase busbar for conducting electric energy includes: a base layer of an insulating material; a first conducting layer of a sheet metal; a first insulating layer of an insulating material arranged on the first conducting layer; a second conducting layer of a sheet metal arranged on the insulating layer; and a second layer of an electrically insulating material which is arranged on the second conducting layer. The first and/or second insulating layers include spacers, each spacer including a layer of a rigid insulating material. At least one of the spacers is glued to an electrically insulating coating of the first and/or second conducting layer, and/or at least one of the spacers is glued to an electrically conductive surface of an uncoated first and/or second conducting layer by an adhesive.
    Type: Application
    Filed: June 18, 2019
    Publication date: October 3, 2019
    Inventors: Rudi Velthuis, Andrej Krivda, Jens Rocks
  • Publication number: 20170194826
    Abstract: It is proposed a wound conductor arrangement for an electrical machine: the wound conductor includes ma wound conductor comprising an electrically conductive material having an electrical conductivity value, and an insulation layer being at least partially provided around the wound conductor by a shrinkable tube comprising insulating material. The wound conductor arrangement further includes an intermediate layer provided between the wound conductor and the insulation layer. The intermediate layer has a conductivity value less than the conductivity value of the wound conductor. Further, an electric machine is proposed including the wound conductor arrangement. A method is described for insulating a wound conductor for an electrical machine.
    Type: Application
    Filed: March 17, 2017
    Publication date: July 6, 2017
    Inventors: Andrej Krivda, Chau-Hon Ho, Cherif Ghoul, Jan Van-Loon, Lei Xie, Spiros Tzavalas
  • Publication number: 20160194489
    Abstract: The present invention relates to a polymer composition suitable for the manufacture of an electrical insulation layer for cables having superior mechanical and electrical properties and being environmentally friendly, to a cable comprising said polymer composition as well as to the use of the polymer composition as an electrical insulation layer in cables.
    Type: Application
    Filed: August 12, 2013
    Publication date: July 7, 2016
    Applicant: ABB TECHNOLOGY LTD
    Inventors: Chau-Hon HO, Cherif GHOUL, Gustavo DOMINGUEZ, Anneli JEDENMALM, Andreas FRIBERG, Andrej KRIVDA, Lei XIE, Andreas FARKAS
  • Patent number: 8545977
    Abstract: Polymer concrete electrical insulation including a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler compositions. The polymer concrete electrical insulation system optionally may contain additives. The epoxy resin composition is based on a cycloaliphatic epoxy resin. The inorganic filler composition can be present within the range of about 76% by weight to about 86% by weight, calculated to the total weight of the polymer concrete electrical insulation system. The inorganic filler composition includes a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (?m) to 100 micron (?m) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)].
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: October 1, 2013
    Assignee: ABB Research Ltd.
    Inventors: Stephen Clifford, Faustine Soyeux, Andrej Krivda, Vincent Tilliette, Nikolaus Zant, Bandeep Singh, Felix Greuter, Leopold Ritzer
  • Publication number: 20130203897
    Abstract: Electrical insulation system with improved electrical breakdown strength, including a hardened polymer component having incorporated therein a filler material and a nano-scale sized filler material. The hardened polymer component is selected from epoxy resin compositions, polyesters, polyamides, polybutylene terephthalate, polyurethanes and polydicyclo-pentadiene. The filler material has an average particle size within the range of 1 ?m-500 ?m, and is present in a quantity within the range of 40%-65% by weight, calculated to the total weight of the insulation system. The nano-scale sized filler material is a pretreated nano-scale sized filler material, having been produced by a sol-gel process. The nano-scale sized filler material is present within the electrical insulation system in an amount of about 1%-20% by weight, calculated to the weight of the filler material present in the electrical insulation system.
    Type: Application
    Filed: August 3, 2012
    Publication date: August 8, 2013
    Applicant: ABB RESEARCH LTD
    Inventors: Xavier KORNMANN, Lars E. Schmidt, Andrej Krivda, Felix Greuter, Martin Carlen
  • Patent number: 8242786
    Abstract: The disclosure relates to a method for partial discharge testing of an insulation component, wherein at least one X-ray pulse is applied to the insulation component, an AC voltage is applied to the insulation component and the partial discharge induced by the at least one X-ray pulse is measured, wherein the dose rate of the at least one X-ray pulse is at least about 10?2 Gray/s. The disclosure relates further to a system for partial discharge testing of an insulation component which includes a flash X-ray source for generating at least one X-ray pulse, an AC voltage source, a voltage sensor, a partial discharge sensor and a partial discharge detection device for evaluating the measured partial discharge.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: August 14, 2012
    Assignee: ABB Research Ltd
    Inventors: Henning Fuhrmann, Andrej Krivda
  • Patent number: 7851525
    Abstract: A high temperature vulcanized silicone rubber is disclosed and includes a high temperature vulcanized silicone rubber as a silicone base and melamine cyanurate as a filler and at least one inorganic filler which is different from melamine cyanurate, and optionally further additives. A total filler content can be within a range of 40 parts (by weight) to 230 parts (by weight) per 100 parts (by weight) of silicone base; wherein (i) the melamine cyanurate is present within a range of 2 parts (by weight) to 40 parts (by weight) per 100 parts (by weight) of silicone base; and (ii) the at least one inorganic filler is an electrical insulator.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: December 14, 2010
    Assignee: ABB Research Ltd
    Inventors: Lars E. Schmidt, Alessandro Mattozzi, Andrej Krivda, Henrik Hillborg, Pitor Saj, Xavier Kornmann
  • Publication number: 20100227158
    Abstract: Surface modified electrical insulation system including a hardened or cured synthetic polymer composition including at least one filler, wherein the surface of said synthetic polymer composition is modified by being coated with a thin coating. The thin coating is applied by a plasma enhanced chemical vapor deposition (PECVD) with a thickness within the range of about 50 nanometer to about 50 ?m; and/or a by a sol-gel technique with a thickness within the range of about 0.5 micron to about 1 mm. The thin coat is an electrically non-conductive polymeric material having a melting point which is distinctly higher than the melting point or degradation temperature of the synthetic filler containing polymer composition.
    Type: Application
    Filed: April 7, 2010
    Publication date: September 9, 2010
    Applicant: ABB Research Ltd.
    Inventors: Stephen CLIFFORD, Bandeep Singh, Andrej Krivda, Lars E. Schmidt, Felix Greuter, Veronika Schmid
  • Publication number: 20100227951
    Abstract: Polymer concrete electrical insulation including a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler compositions. The polymer concrete electrical insulation system optionally may contain additives. The epoxy resin composition is based on a cycloaliphatic epoxy resin. The inorganic filler composition can be present within the range of about 76% by weight to about 86% by weight, calculated to the total weight of the polymer concrete electrical insulation system. The inorganic filler composition includes a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (?m) to 100 micron (?m) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)].
    Type: Application
    Filed: April 8, 2010
    Publication date: September 9, 2010
    Applicant: ABB Research Ltd.
    Inventors: Stephen CLIFFORD, Faustine Soyeux, Andrej Krivda, Vincent Tilliette, Nikolaus Zant, Bandeep Singh, Felix Greuter, Leopold Ritzer
  • Publication number: 20100105815
    Abstract: A high temperature vulcanized silicone rubber is disclosed and includes a high temperature vulcanized silicone rubber as a silicone base and melamine cyanurate as a filler and at least one inorganic filler which is different from melamine cyanurate, and optionally further additives. A total filler content can be within a range of 40 parts (by weight) to 230 parts (by weight) per 100 parts (by weight) of silicone base; wherein (i) the melamine cyanurate is present within a range of 2 parts (by weight) to 40 parts (by weight) per 100 parts (by weight) of silicone base; and (ii) the at least one inorganic filler is an electrical insulator.
    Type: Application
    Filed: January 4, 2010
    Publication date: April 29, 2010
    Applicant: ABB Research Ltd
    Inventors: Lars E. Schmidt, Alessandro Mattozzi, Andrej Krivda, Henrik Hillborg, Pitor Saj, Xavier Kornmann
  • Publication number: 20100045305
    Abstract: The disclosure relates to a method for partial discharge testing of an insulation component, wherein at least one X-ray pulse is applied to the insulation component, an AC voltage is applied to the insulation component and the partial discharge induced by the at least one X-ray pulse is measured, wherein the dose rate of the at least one X-ray pulse is at least about 10?2 Gray/s. The disclosure relates further to a system for partial discharge testing of an insulation component which includes a flash X-ray source for generating at least one X-ray pulse, an AC voltage source, a voltage sensor, a partial discharge sensor and a partial discharge detection device for evaluating the measured partial discharge.
    Type: Application
    Filed: August 19, 2009
    Publication date: February 25, 2010
    Applicant: ABB Research Ltd.
    Inventors: Henning FUHRMANN, Andrej Krivda
  • Publication number: 20100032187
    Abstract: An electrical insulating composition that can be used in high voltage applications. The electrically insulating composition includes silicone rubber and has improved hydrophobic stability over other silicone rubbers. The material is particularly suited to be used in high voltage (>1 kV) composite insulators.
    Type: Application
    Filed: November 28, 2007
    Publication date: February 11, 2010
    Applicant: ABB Research Ltd.,
    Inventors: Xiavier Kornmann, Henrik Hillborg, Patrick Meier, Andrej Krivda
  • Publication number: 20080179077
    Abstract: The bushing has a conductor and a core surrounding the conductor. The core comprises a sheet-like spacer, wherein the spacer contains filler particles. The bushing can be a resin-impregnated graded bushing impregnated with an electrically insulating matrix material. The spacer may comprise paper, in particular creped paper. The filler particles can be electrically insulating or semiconductive particles. An increased thermal conductivity of the core can be achieved.
    Type: Application
    Filed: December 6, 2007
    Publication date: July 31, 2008
    Applicant: ABB Research Ltd
    Inventors: Andrej Krivda, Vincent Tilliette, Jens Rocks, Henrik Hillborg, Olof Hjortstam, Leopold Ritzer, Patrick Meier
  • Patent number: 6332368
    Abstract: A sampling tool is used to collect a sample from the surface of an insulator in a high voltage installation during live line conditions. The sampling tool comprises a sampling head mounted to one end of a hot stick. Sampling cartridges are interchangeably mountable to a pivoted block on the sampling head. The block is biased by a spring to urge the cartridge into contact with the surface of the insulator when a trigger on the sampling head comes into contact with the insulator. One cartridge includes a planing blade for collecting a sliver of material from the insulator surface. An alternative cartridge has a swab and an abrasive pad interchangeably insertable thereon for collecting a material sample from the insulator surface.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: December 25, 2001
    Assignee: Queensland University of Technology
    Inventors: Gregory Anthony Cash, Graeme Allan George, Andrej Krivda, Frank George Deabill, Paul Blackmore, David Birtwhistle