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).
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Patent number: 8411402Abstract: 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: GrantFiled: June 22, 2006Date of Patent: April 2, 2013Assignee: ABB Technology Ltd.Inventor: Per Halvarsson
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Patent number: 7936091Abstract: 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: GrantFiled: March 23, 2006Date of Patent: May 3, 2011Assignee: ABB Technology Ltd.Inventors: Lennart Ängquist, Per Halvarsson, Bengt Stridh, Torbjörn Ringvall
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Patent number: 7786710Abstract: 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: GrantFiled: December 22, 2004Date of Patent: August 31, 2010Assignee: ABB Technology Ltd.Inventors: Birger Drugge, Per Halvarsson, Lars Liljestrand, Magnus Backman
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Publication number: 20100013315Abstract: 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: ApplicationFiled: September 30, 2009Publication date: January 21, 2010Inventor: Per Halvarsson
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Publication number: 20100014337Abstract: 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: ApplicationFiled: June 22, 2006Publication date: January 21, 2010Applicant: ABB TECHNOLOGY LTD.Inventor: Per Halvarsson
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Publication number: 20090317694Abstract: 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: ApplicationFiled: March 6, 2006Publication date: December 24, 2009Applicant: ABB Research Ltd.Inventors: Lennart Ängquist, Magnus Callavik, Gerhard Brosig, Willy Hermansson, Per Halvarsson, Stefan Johansson, Bertil Nygren, Gunnar Russberg, Jan R. Svensson
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Patent number: 7616087Abstract: 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: GrantFiled: September 12, 2003Date of Patent: November 10, 2009Assignee: ABB ABInventors: Per Halvarsson, Claes Bengtsson, David Larsson, Johan Karlstrand
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Publication number: 20090234598Abstract: 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: ApplicationFiled: March 6, 2006Publication date: September 17, 2009Applicant: ABB RESEARCH LTD.Inventors: Lennart Ängquist, Magnus Callavik, Gerhard Brosig, Willy Hermansson, Per Halvarsson, Stefan Johansson, Bertil Nygren, Gunnar Russberg, Jan R. Svensson
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Publication number: 20090167090Abstract: 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: ApplicationFiled: March 23, 2006Publication date: July 2, 2009Applicant: ABB Technology Ltd.Inventors: Lennart Angquist, Per Halvarsson, Bengt Stridh, Torbjorn Ringvall
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Publication number: 20080143305Abstract: 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: ApplicationFiled: December 22, 2004Publication date: June 19, 2008Applicant: ABB Technology Ltd.Inventors: Birger Drugge, Per Halvarsson, Lars Liljestrand, Magnus Backman
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Patent number: 7295416Abstract: 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: GrantFiled: May 8, 2003Date of Patent: November 13, 2007Assignee: ABB ABInventors: Per Halvarsson, Ola Jeppsson, Jan Johansson, Lars Paulsson
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Patent number: 7245037Abstract: 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: GrantFiled: September 13, 2002Date of Patent: July 17, 2007Assignee: ABB ABInventors: Lennart Ängquist, Per Halvarsson, Lars Liljestrand, Stefan Valdemarsson, Claes Bengtsson, Willie Wong
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Publication number: 20060096953Abstract: 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: ApplicationFiled: September 12, 2003Publication date: May 11, 2006Inventors: Per Halvarsson, Claes Bengtsson, David Larsson, Johan Karlstrand
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Publication number: 20050168889Abstract: 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: ApplicationFiled: May 8, 2003Publication date: August 4, 2005Inventors: Per Halvarsson, Ola Jeppsson, Jan Johansson, Lars Paulsson
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Publication number: 20040100230Abstract: 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: ApplicationFiled: November 25, 2002Publication date: May 27, 2004Inventors: Per Halvarsson, Mojtaba Noroozian
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Patent number: 6737837Abstract: 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: GrantFiled: November 25, 2002Date of Patent: May 18, 2004Assignee: ABB ABInventors: Per Halvarsson, Mojtaba Noroozian