Patents by Inventor Per Skarby
Per Skarby 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: 9928973Abstract: A dielectric insulation medium. The insulation medium is characterized in that it comprises a fluoroketone having from 4 to 12 carbon atoms.Type: GrantFiled: February 27, 2014Date of Patent: March 27, 2018Assignee: ABB Technology AGInventors: Max-Steffen Claessens, Per Skarby
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Patent number: 9450394Abstract: A high voltage DC circuit breaker includes a semiconductor switching assembly in series with a mechanical switch. When the semiconductor switching assembly is switched off due to a current fault, a residual current flowing through arresters of the semiconductor switching assembly is switched off by the mechanical switch. A capacitor arranged parallel to the mechanical switch leads to passive resonance effects, which in turn induce current zero crossings in its arc. The current zero crossings allow for reliable extinguishing of the arc. The mechanical switch can be an AC circuit breaker.Type: GrantFiled: June 24, 2013Date of Patent: September 20, 2016Assignee: ABB Technology AGInventors: Daniel Ohlsson, Emmanouil Panousis, Jürgen Häfner, Markus Bujotzek, Per Skarby
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Patent number: 9246324Abstract: A circuit breaker is disclosed which includes a plurality of stacked breaker modules arranged in series. Each breaker module can include, in parallel, a mechanical switching assembly, a semiconductor switching assembly and an arrester assembly. The circuit breaker can easily be adapted to a larger number of applications and voltage ranges by varying the number of breaker modules.Type: GrantFiled: April 6, 2015Date of Patent: January 26, 2016Assignee: ABB TECHNOLOGY AGInventor: Per Skarby
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Patent number: 9196431Abstract: An encapsulated switchgear that includes a housing defining, an insulating space, and an electrical active part arranged in the insulating space, the insulating space with an insulation medium. The switchgear is characterized in that the insulation medium with a dielectric compound having a boiling point of above ?5° C.Type: GrantFiled: February 7, 2014Date of Patent: November 24, 2015Assignee: ABB Technology AGInventors: Maik Hyrenbach, Ole Granhaug, Max-Steffen Claessens, Per Skarby
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Publication number: 20150214724Abstract: A circuit breaker is disclosed which includes a plurality of stacked breaker modules arranged in series. Each breaker module can include, in parallel, a mechanical switching assembly, a semiconductor switching assembly and an arrester assembly. The circuit breaker can easily be adapted to a larger number of applications and voltage ranges by varying the number of breaker modules.Type: ApplicationFiled: April 6, 2015Publication date: July 30, 2015Applicant: ABB TECHNOLOGY AGInventor: Per SKARBY
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Patent number: 9035212Abstract: An exemplary medium or high voltage switch has a first set of contact elements and a second set of contact elements. Each contact element includes an insulating carrier carrying conducting elements. In the closed state of the switch, the conducting elements align to form one or more current paths between terminals of the switch along an axial direction. For opening the switch, the contact elements are mutually displaced by means of one or two drives along a direction perpendicular to the axial direction. The switching arrangement is arranged in a fluid-tight housing in a gas of elevated pressure or in a liquid. The switch has a high voltage withstand capability and fast switching times.Type: GrantFiled: April 11, 2012Date of Patent: May 19, 2015Assignee: ABB TECHNOLOGY AGInventors: Lars Liljestrand, Lars E. Jonsson, Per Skarby, Per Lindholm, Ueli Steiger
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Patent number: 8995097Abstract: A high voltage DC breaker apparatus configured to interrupt a fault current occurring in a high voltage DC conductor comprises a mechanical interrupter, at least one semiconductor device connected in series with the interrupter, an arrester connected in parallel with the semiconductor device and an LC-circuit connected in parallel with the series connection of the semiconductor device and the interrupter. A control unit is configured to, upon detection of a fault current, control switching of the semiconductor device at a frequency adapted to the values of an inductance and a capacitance of the LC-circuit for charging the capacitance by the fault current while making the current through the interrupter oscillating with an increasing amplitude and the interrupter to open for having the mechanical contacts thereof separated when current zero-crossing is reached for obtaining interruption of the fault current through the interrupter.Type: GrantFiled: May 9, 2011Date of Patent: March 31, 2015Assignee: ABB Technology AGInventor: Per Skarby
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Patent number: 8837093Abstract: A DC current path for DC power transmission includes at least a first switching element and a second switching element connected in series. A resonance circuit is configured to be connectable in parallel to the series connection of the at least one first switching element and second switching element by means of a switch.Type: GrantFiled: May 14, 2012Date of Patent: September 16, 2014Assignee: ABB Technology AGInventors: Emmanouil Panousis, Jadran Kostovic, Lars Liljestrand, Markus Bujotzek, Per Skarby
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Patent number: 8822870Abstract: A dielectric insulation medium including a fluoroketone containing 5 carbon atoms, in a mixture with a dielectric insulation gas component different from the fluoroketone, in particular air or an air component, the dielectric insulation medium, in particular the dielectric insulation gas, having a non-linearly increased dielectric strength that is larger than a sum of dielectric strengths of the gas components of the dielectric insulation medium.Type: GrantFiled: June 14, 2013Date of Patent: September 2, 2014Assignee: ABB Technology Ltd.Inventors: Javier Mantilla, Max-Steffen Claessens, Nicola Gariboldi, Stephan Grob, Per Skarby, Thomas Alfred Paul, Navid Mahdizadeh
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Patent number: 8797128Abstract: An exemplary medium or high voltage switch has a first set of contact elements and a second set of contact elements. Each contact element includes an insulating carrier carrying conducting elements. In the closed current-carrying state of the switch, the conducting elements align to form one or more current paths between terminals of the switch along an axial direction. For opening the switch, the contact elements are mutually displaced by through two drives along a direction perpendicular to the axial direction. The switching arrangement is arranged in a fluid-tight housing in a gas of elevated pressure or in a liquid. The switch has a high voltage withstand capability and fast switching times.Type: GrantFiled: April 11, 2012Date of Patent: August 5, 2014Assignee: ABB Technology AGInventors: Lars Liljestrand, Lars E. Jonsson, Per Skarby, Ryan Chladny
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Publication number: 20140175341Abstract: A dielectric insulation medium. The insulation medium is characterized in that it comprises a fluoroketone having from 4 to 12 carbon atoms.Type: ApplicationFiled: February 27, 2014Publication date: June 26, 2014Inventors: Max-Steffen Claessens, Per Skarby
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Publication number: 20140151202Abstract: An encapsulated switchgear that includes a housing defining, an insulating space, and an electrical active part arranged in the insulating space, the insulating space with an insulation medium. The switchgear is characterized in that the insulation medium with a dielectric compound having a boiling point of above ?5° C.Type: ApplicationFiled: February 7, 2014Publication date: June 5, 2014Inventors: Maik Hyrenbach, Ole Granhaug, Max-Steffen Claessens, Per Skarby
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Patent number: 8709303Abstract: A dielectric insulation medium including a hydrofluoro monoether, the hydrofluoro monoether containing at least three carbon atoms. The insulation medium according has high insulation capabilities, in particular a high dielectric strength, and at the same time a low GWP. The invention further includes an insulation medium which is chemically and thermally stable also at temperatures above 140° C., which is non-toxic or has a low toxicity level, and which in addition is non-corrosive and non-explosive.Type: GrantFiled: June 14, 2013Date of Patent: April 29, 2014Assignee: ABB Research Ltd.Inventors: Navid Mahdizadeh, Thomas Alfred Paul, Judith Kessler, Markus Bujotzek, Patrick Stoller, Max-Steffen Claessens, Per Skarby
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Patent number: 8704095Abstract: A dielectric insulation medium. The insulation medium is characterized in that it comprises a fluoroketone having from 4 to 12 carbon atoms.Type: GrantFiled: July 22, 2011Date of Patent: April 22, 2014Assignee: ABB Technology AGInventors: Max-Steffen Claessens, Per Skarby
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Patent number: 8680421Abstract: An encapsulated switchgear that includes a housing defining, an insulating space, and an electrical active part arranged in the insulating space, the insulating space with an insulation medium. The switchgear is characterized in that the insulation medium with a dielectric compound having a boiling point of above ?25° C.Type: GrantFiled: December 12, 2011Date of Patent: March 25, 2014Assignee: ABB Technology AGInventors: Maik Hyrenbach, Ole Granhaug, Max-Steffen Claessens, Per Skarby
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Publication number: 20130278078Abstract: A high voltage DC circuit breaker includes a semiconductor switching assembly in series with a mechanical switch. When the semiconductor switching assembly is switched off due to a current fault, a residual current flowing through arresters of the semiconductor switching assembly is switched off by the mechanical switch. A capacitor arranged parallel to the mechanical switch leads to passive resonance effects, which in turn induce current zero crossings in its arc. The current zero crossings allow for reliable extinguishing of the arc. The mechanical switch can be an AC circuit breaker.Type: ApplicationFiled: June 24, 2013Publication date: October 24, 2013Applicant: ABB Technology AGInventors: Daniel OHLSSON, Emmanouil Panousis, Jürgen HÄFNER, Markus Bujotzek, Per Skarby
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Publication number: 20130277334Abstract: A dielectric insulation medium including a fluoroketone containing 5 carbon atoms, in a mixture with a dielectric insulation gas component different from the fluoroketone, in particular air or an air component, the dielectric insulation medium, in particular the dielectric insulation gas, having a non-linearly increased dielectric strength that is larger than a sum of dielectric strengths of the gas components of the dielectric insulation medium.Type: ApplicationFiled: June 14, 2013Publication date: October 24, 2013Inventors: Javier Mantilla, Max-Steffen Claessens, Nicola Gariboldi, Stephan Grob, Per Skarby, Thomas Alfred Paul, Navid Mahdizadeh
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Publication number: 20130265692Abstract: A dielectric insulation medium including a hydrofluoro monoether, the hydrofluoro monoether containing at least three carbon atoms. The insulation medium according has high insulation capabilities, in particular a high dielectric strength, and at the same time a low GWP. The invention further includes an insulation medium which is chemically and thermally stable also at temperatures above 140° C., which is non-toxic or has a low toxicity level, and which in addition is non-corrosive and non-explosive.Type: ApplicationFiled: June 14, 2013Publication date: October 10, 2013Inventors: Navid Mahdizadeh, Thomas Alfred Paul, Judith Marold, Markus Bujotzek, Patrick Stoller, Max-Steffen Claessens, Per Skarby
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Publication number: 20130098874Abstract: An exemplary medium or high voltage switch has a first set of contact elements and a second set of contact elements. Each contact element includes an insulating carrier carrying conducting elements. In the closed state of the switch, the conducting elements align to form one or more current paths between terminals of the switch along an axial direction. For opening the switch, the contact elements are mutually displaced by means of one or two drives along a direction perpendicular to the axial direction. The switching arrangement is arranged in a fluid-tight housing in a gas of elevated pressure or in a liquid. The switch has a high voltage withstand capability and fast switching times.Type: ApplicationFiled: April 11, 2012Publication date: April 25, 2013Applicant: ABB Technology AGInventors: Lars LILJESTRAND, Lars E. Jonsson, Per Skarby, Per Lindholm, Ueli Steiger
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Publication number: 20130070492Abstract: A high voltage DC breaker apparatus configured to interrupt a fault current occurring in a high voltage DC conductor comprises a mechanical interrupter, at least one semiconductor device connected in series with the interrupter, an arrester connected in parallel with the semiconductor device and an LC-circuit connected in parallel with the series connection of the semiconductor device and the interrupter. A control unit is configured to, upon detection of a fault current, control switching of the semiconductor device at a frequency adapted to the values of an inductance and a capacitance of the LC-circuit for charging the capacitance by the fault current while making the current through the interrupter oscillating with an increasing amplitude and the interrupter to open for having the mechanical contacts thereof separated when current zero-crossing is reached for obtaining interruption of the fault current through the interrupter.Type: ApplicationFiled: May 9, 2011Publication date: March 21, 2013Applicant: ABB TECHNOLOGY AGInventor: Per Skarby