Patents by Inventor Per Halvarsson

Per Halvarsson 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: 8411402
    Abstract: An arrangement for cooling a high voltage converter including a major loop with a pump for making a coolant liquid to pass power semiconductor devices of the converter and a heat exchanger for lowering the temperature of the coolant liquid before passing the power semiconductor devices again. An extra loop is connected to the major loop. The extra loop has a cooling apparatus containing a volume of a cooling medium and adapted to cool the medium to a temperature substantially lower than the temperature of the coolant liquid after having passed the heat exchanger in the major loop. A control unit is adapted to divert at least a part of the coolant liquid to flow through the extra loop when the need of cooling the power semiconductor devices of the converter is extremely high.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: April 2, 2013
    Assignee: ABB Technology Ltd.
    Inventor: Per Halvarsson
  • Patent number: 7936091
    Abstract: An energy supply system adapted for supplying energy to equipment on a high voltage platform. The system includes a fuel cell and an effectuating capacitor. The system also includes an intermediate storage and supply unit. This unit stores energy from the fuel cell and supplies energy to the effectuating capacitor via an electric transforming unit. A high voltage platform including the energy supply system. An electrical network including the platform. A method for supplying energy to equipment on a high voltage platform.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: May 3, 2011
    Assignee: ABB Technology Ltd.
    Inventors: Lennart Ängquist, Per Halvarsson, Bengt Stridh, Torbjörn Ringvall
  • Patent number: 7786710
    Abstract: An apparatus for reactive power compensation in an ac medium voltage power network. The apparatus includes a common connection; a first branch including a first switch, and a first capacitor; and a second branch including a second switch and a second capacitor.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: August 31, 2010
    Assignee: ABB Technology Ltd.
    Inventors: Birger Drugge, Per Halvarsson, Lars Liljestrand, Magnus Backman
  • Publication number: 20100014337
    Abstract: An arrangement for cooling a high voltage converter including a major loop with a pump for making a coolant liquid to pass power semiconductor devices of the converter and a heat exchanger for lowering the temperature of the coolant liquid before passing the power semiconductor devices again. An extra loop is connected to the major loop. The extra loop has a cooling apparatus containing a volume of a cooling medium and adapted to cool the medium to a temperature substantially lower than the temperature of the coolant liquid after having passed the heat exchanger in the major loop. A control unit is adapted to divert at least a part of the coolant liquid to flow through the extra loop when the need of cooling the power semiconductor devices of the converter is extremely high.
    Type: Application
    Filed: June 22, 2006
    Publication date: January 21, 2010
    Applicant: ABB TECHNOLOGY LTD.
    Inventor: Per Halvarsson
  • Publication number: 20100013315
    Abstract: A power supply device for high voltage includes first and second back-to-back voltage converters, wherein an electrical energy store is connected to the DC side of the first voltage converter, a load is connected to the AC side of the second voltage converter and a generator is connected to the second converter to provide momentary power during failures.
    Type: Application
    Filed: September 30, 2009
    Publication date: January 21, 2010
    Inventor: Per Halvarsson
  • Publication number: 20090317694
    Abstract: A temperature controller for providing heat to an energy storage device of a power compensator. The energy storage device includes a plurality of high temperature battery units on high potential. The temperature controller includes a pipe network for housing a heat transfer medium. The pipe network includes a main pipe loop and a local pipe loop in each battery unit. Each local pipe loop includes a first end for receiving a heat transfer medium and a second end for exhausting the medium.
    Type: Application
    Filed: March 6, 2006
    Publication date: December 24, 2009
    Applicant: ABB Research Ltd.
    Inventors: Lennart Ängquist, Magnus Callavik, Gerhard Brosig, Willy Hermansson, Per Halvarsson, Stefan Johansson, Bertil Nygren, Gunnar Russberg, Jan R. Svensson
  • Patent number: 7616087
    Abstract: An installation for transmission of electric power via a high-voltage ac voltage line between two switchgear units located at a large distance from each other. For the transmission of the electric power, the ac voltage line includes at least one extruded cable with an inner electric conductor, an insulating layer of a solid material surrounding the conductor, and an outer screen layer located at ground potential. The installation also includes one or more inductors located along the extent of the cable between the switchgear units and integrated into the cable. The inductors are connected between the conductor of the cable and ground for reactive shunt compensation.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: November 10, 2009
    Assignee: ABB AB
    Inventors: Per Halvarsson, Claes Bengtsson, David Larsson, Johan Karlstrand
  • Publication number: 20090234598
    Abstract: A charge controller of a high temperature battery for a power compensator of an electric power transmission line. The charge controller includes a sensor and a processor including a memory module. The charge controller includes a virtual battery model of the battery.
    Type: Application
    Filed: March 6, 2006
    Publication date: September 17, 2009
    Applicant: ABB RESEARCH LTD.
    Inventors: Lennart Ängquist, Magnus Callavik, Gerhard Brosig, Willy Hermansson, Per Halvarsson, Stefan Johansson, Bertil Nygren, Gunnar Russberg, Jan R. Svensson
  • Publication number: 20090167090
    Abstract: An energy supply system adapted for supplying energy to equipment on a high voltage platform. The system includes a fuel cell and an effectuating capacitor. The system also includes an intermediate storage and supply unit. This unit stores energy from the fuel cell and supplies energy to the effectuating capacitor via an electric transforming unit. A high voltage platform including the energy supply system. An electrical network including the platform. A method for supplying energy to equipment on a high voltage platform.
    Type: Application
    Filed: March 23, 2006
    Publication date: July 2, 2009
    Applicant: ABB Technology Ltd.
    Inventors: Lennart Angquist, Per Halvarsson, Bengt Stridh, Torbjorn Ringvall
  • Publication number: 20080143305
    Abstract: An apparatus for reactive power compensation in an ac medium voltage power network. The apparatus includes a common connection; a first branch including a first switch, and a first capacitor; and a second branch including a second switch and a second capacitor.
    Type: Application
    Filed: December 22, 2004
    Publication date: June 19, 2008
    Applicant: ABB Technology Ltd.
    Inventors: Birger Drugge, Per Halvarsson, Lars Liljestrand, Magnus Backman
  • Patent number: 7295416
    Abstract: A device for quick closing of an electric high-voltage circuit. A main spark gap is provided with a first and a second main electrode, and a triggering device. The triggering device includes an auxiliary electrode gap provided with a first and a second auxiliary electrode and is adapted, where necessary, to generate an arc in the auxiliary spark gap for igniting an arc in the main spark gap. Each auxiliary electrode is provided with a guide rail designed such that the arc, via the guide rails and under the influence of the generated inherent magnetic field, moves into the main spark gap. The two guide rails each have a length that is larger than the width of the auxiliary spark gap. The auxiliary electrodes are adapted so as to be protected from the effect of plasma formed in the main spark gap. A hermetic enclosure encloses the main spark gap and the auxiliary spark gap.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: November 13, 2007
    Assignee: ABB AB
    Inventors: Per Halvarsson, Ola Jeppsson, Jan Johansson, Lars Paulsson
  • Patent number: 7245037
    Abstract: An electric network for generation and transmission of electric power, including a power generating part, a point of common connection for the power generating part, a transmission link, a load network, and a reactive power compensator. The transmission link is coupled between the point of common connection and a grid connection point at the load network. The reactive power compensator is coupled to transmission link. The power generating part includes at least one wind turbine with an electric generator of induction type, coupled to the point of common connection. The reactive power compensator includes a capacitor bank and in parallel coupling to the capacitor bank a controllable inductor having a magnetic core, a main winding for alternating current, and a DC-control winding for direct current. The DC-control winding for control of the magnetic flux is set up by the main winding via orthogonal magnetization of the core.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: July 17, 2007
    Assignee: ABB AB
    Inventors: Lennart Ängquist, Per Halvarsson, Lars Liljestrand, Stefan Valdemarsson, Claes Bengtsson, Willie Wong
  • Publication number: 20060096953
    Abstract: An installation for transmission of electric power via a high-voltage ac voltage line between two switchgear units located at a large distance from each other. For the transmission of the electric power, the ac voltage line includes at least one extruded cable with an inner electric conductor, an insulating layer of a solid material surrounding the conductor, and an outer screen layer located at ground potential. The installation also includes one or more inductors located along the extent of the cable between the switchgear units and integrated into the cable. The inductors are connected between the conductor of the cable and ground for reactive shunt compensation.
    Type: Application
    Filed: September 12, 2003
    Publication date: May 11, 2006
    Inventors: Per Halvarsson, Claes Bengtsson, David Larsson, Johan Karlstrand
  • Publication number: 20050168889
    Abstract: A device for quick closing of an electric high-voltage circuit. A main spark gap is provided with a first and a second main electrode, and a triggering device. The triggering device includes an auxiliary electrode gap provided with a first and a second auxiliary electrode and is adapted, where necessary, to generate an arc in the auxiliary spark gap for igniting an arc in the main spark gap. Each auxiliary electrode is provided with a guide rail designed such that the arc, via the guide rails and under the influence of the generated inherent magnetic field, moves into the main spark gap. The two guide rails each have a length that is larger than the width of the auxiliary spark gap. The auxiliary electrodes are adapted so as to be protected from the effect of plasma formed in the main spark gap. A hermetic enclosure encloses the main spark gap and the auxiliary spark gap.
    Type: Application
    Filed: May 8, 2003
    Publication date: August 4, 2005
    Inventors: Per Halvarsson, Ola Jeppsson, Jan Johansson, Lars Paulsson
  • Publication number: 20040100230
    Abstract: A device (2) for control of a power flow in a three-phase ac transmission line (L2, La, Lb, Lc) has, for each of its phases (a, b, c), a transformer (12a, 12b, 12c) with a primary winding (121c) and a secondary winding (122c). The secondary winding is serially connected into the respective phase of the transmission line. A voltage dependent on a controllable part of the voltage between the other two phases of the transmission line is applied to the primary winding of the transformer. The device comprises, for each of the phases of the transmission line, a series circuit with a first (T1a, T1b, T1c) and a second (T2a, T2b, T2c) terminal and a connection point (Ja, Jb, Jc). The series circuit comprises a first reactive impedance element (21a, 21b, 21c) with a fixed reactance connected between the first terminal and the connection point, and a second reactive impedance element (22a, 22b, 22c, 23a, 23b, 23c) with a variable reactance connected between the connection point and the second terminal.
    Type: Application
    Filed: November 25, 2002
    Publication date: May 27, 2004
    Inventors: Per Halvarsson, Mojtaba Noroozian
  • Patent number: 6737837
    Abstract: A device (2) for control of a power flow in a three-phase ac transmission line (L2, La, Lb, Lc) has, for each of its phases (a, b, c), a transformer (12a, 12b, 12c) with a primary winding (121c) and a secondary winding (122c). The secondary winding is serially connected into the respective phase of the transmission line. A voltage dependent on a controllable part of the voltage between the other two phases of the transmission line is applied to the primary winding of the transformer. The device comprises, for each of the phases of the transmission line, a series circuit with a first (T1a, T1b, T1c) and a second (T2a, T2b, T2c) terminal and a connection point (Ja, Jb, Jc). The series circuit comprises a first reactive impedance element (21a, 21b, 21c) with a fixed reactance connected between the first terminal and the connection point, and a second reactive impedance element (22a, 22b, 22c, 23a, 23b, 23c) with a variable reactance connected between the connection point and the second terminal.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: May 18, 2004
    Assignee: ABB AB
    Inventors: Per Halvarsson, Mojtaba Noroozian