Patents by Inventor Peter Sjoberg
Peter Sjoberg 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: 11942742Abstract: A condenser core for being positioned around a high voltage main electrical conductor, the condenser core including an electrically insulating body; a longitudinal through hole for accommodating the main electrical conductor; a plurality of electrically conductive foils encircling the through hole and being surrounded by the body such that each foil is insulated from any other of the foils; a potential electrical conductor for establishing an electrical connection between one of the foils and the main electrical conductor when the main electrical conductor is accommodated in the through hole; and a fastening device configured to mechanically connect the potential electrical conductor to the main electrical conductor when the main electrical conductor is accommodated in the through hole. A bushing, a high voltage application and a method of producing a bushing are also provided.Type: GrantFiled: September 18, 2019Date of Patent: March 26, 2024Assignee: HITACHI ENERGY LTDInventors: Björn Edberg, Thomas Eriksson, Peter Sjöberg
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Patent number: 11881330Abstract: An electrical bushing is specified, the bushing including a flange with a lower part and an upper part affixed to one another and further including a core surrounded by the flange, wherein the flange is affixed to the core by a locking compound disposed in a volume of a joint between the flange and the core, and wherein the volume of the joint further includes a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint. Furthermore, a method of producing an electrical bushing is specified.Type: GrantFiled: September 28, 2021Date of Patent: January 23, 2024Assignee: Hitachi Energy LtdInventors: Samuel Broderick, Peter Sjoberg, Jan Czyzewski
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Patent number: 11831133Abstract: The invention is concerned with a bushing for high voltage applications and a bushing arrangement including such a bushing. The bushing includes a conductor defining a longitudinal axis (A) through the bushing where the bushing has a central section and a first and a second peripheral section on opposite sides of the central section along the longitudinal axis (A) and includes an optical fibre with a first part (P1) stretching through the central section, the fibre being adapted to detect physical properties being influenced or caused by the operation of the bushing. The sections are sections of a solid condenser core and the bushing further includes an enclosure for a length of fibre that is to exit the bushing, the enclosure being buried in the central section adjacent the surface of the condenser core and having an interior volume.Type: GrantFiled: April 25, 2019Date of Patent: November 28, 2023Assignee: HITACHI ENERGY LTDInventors: Roger Hedlund, Peter Sjöberg
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Patent number: 11769611Abstract: Embodiments of the present disclosure relate to a sealing arrangement of a bushing for a power electrical device and a bushing comprising the sealing arrangement. The sealing arrangement includes a top cover; a central conductor going through the top cover; a guide element having a cylinder portion and a flange portion extended from a middle part of the cylinder portion, wherein the cylinder portion is arranged between the top cover and the central conductor, and the flange portion is connected onto the top cover; a static sealing structure provided between the guide element and the top cover; and a dynamic sealing structure provided between the guide element and the central conductor. With the new sealing structure design, it could provide a good sealing performance so that the bushing can be used in various environments.Type: GrantFiled: January 23, 2018Date of Patent: September 26, 2023Assignee: Hitachi Energy Switzerland AGInventors: Claes Peter Sjöberg, Natalia Gutman, Danan Yao, Peirong Cai
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Publication number: 20230223189Abstract: A high voltage (HV) apparatus insulated with an insulating gel includes at least two electrically conductive elements, such as a head transformer cover, a head housing base, a core casing, a primary conductor, bottom external housing, a bottom support flange, and/or a core. At least one of the electrically conductive elements has a coating made of solid insulating material separating the surface of the conductive element from the insulating gel and adapted for limiting electron emission from the conductive elements into the insulating gel.Type: ApplicationFiled: March 8, 2023Publication date: July 13, 2023Inventors: Jedrzej Bananszczyk, Jan Czyzewski, Bartlomiej Adamczyk, Lucasz Bachorz, Wojciech Wysocki, Marcin Tarnowski, Roger Hedlung, Peter Sjoberg, Jan Ostlund
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Patent number: 11605501Abstract: The present invention refers to HV apparatus, in particular a HV dry current transformer, insulated with an insulating gel, or a voltage transformer, insulated with an insulating gel. The dry HV current transformer comprises at least two electrically conductive elements i.e. a head transformer cover, a head housing base, a core casing and a primary conductor. In the dry HV current transformer at least one of the electrically conductive elements has a coating made of solid insulating material separating the surface of the conductive elements from the insulating gel and adapted for limiting the electron emission from the conductive elements into the insulating gel. The voltage transformer comprises a bottom external housing, a bottom support flange, a core.Type: GrantFiled: October 25, 2018Date of Patent: March 14, 2023Assignee: Hitachi Energy Switzerland AGInventors: Jedrzej Banaszczyk, Jan Czyzewski, Bartlomiej Adamczyk, Lukasz Bachorz, Wojciech Wysocki, Marcin Tarnowski, Roger Hedlung, Peter Sjoberg, Jan Ostlund
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Patent number: 11552463Abstract: A flange fitted around a round cylindrical condenser core of a bushing is described. The flange comprises an annular lower flange part arranged to fit around a radial shoulder of the condenser core such that a lower shoulder chamfer of the shoulder rests against lower flange chamfer of the lower flange part around the circumference of the condenser core; and an annular upper flange part fastened to the lower flange part and fits around the condenser core above an upper shoulder chamfer of the shoulder. An upper flange chamfer of the upper flange part is between an upper sealing element and a lower sealing element, forming an annular chamfer space is formed between the upper flange chamfer and the upper shoulder chamfer between the upper and lower sealing elements. The flange comprises an injection through hole for a filler material to be injected there through to fill the chamfer space.Type: GrantFiled: May 30, 2019Date of Patent: January 10, 2023Assignee: Hitachi Energy Switzerland AGInventors: Peter Sjöberg, Jakob Emmel, Jan Czyzewski, Ansgar Dais, Fabian Stacy, Leif Roosgardh
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Publication number: 20220415544Abstract: The present disclosure relates to a condenser core configured for surrounding an electrical conductor. The condenser core includes an insulation material and a plurality of electrically conducting capacitive layers for modifying electrical fields formed by a current flowing in the electrical conductor. At least one of the electrically conducting capacitive layers includes a first foil and a second foil. Each of the first and second foils of an outermost capacitive layer is connected with a grounding arrangement for grounding the foils.Type: ApplicationFiled: October 27, 2020Publication date: December 29, 2022Applicant: Hitachi Energy Switzerland AGInventors: Jens KANJE-NORDBERG, Peter SJÖBERG, Kenneth JOHANSSON
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Publication number: 20220293302Abstract: The present disclosure relates to a bushing comprising a conductor tube, a support tube, arranged within the conductor tube, a draw-rod configured to run through the support tube, and a contact arrangement arranged to be drawn into the conductor tube by the draw-rod. The contact arrangement comprises a sealing plug arranged for sealingly engaging an inside wall of the conductor tube to prevent liquid from passing the sealing plug into the conductor tube.Type: ApplicationFiled: November 20, 2020Publication date: September 15, 2022Applicant: Hitachi Energy Switzerland AGInventors: Fredrik GRAAS, Jesper CALPSON, Alejandra RAVANAL, David EMILSSON, Peter SJÖBERG, Zoltan REPASI
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Publication number: 20220102031Abstract: An electrical bushing is specified, the bushing including a flange with a lower part and an upper part affixed to one another and further including a core surrounded by the flange, wherein the flange is affixed to the core by a locking compound disposed in a volume of a joint between the flange and the core, and wherein the volume of the joint further includes a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint. Furthermore, a method of producing an electrical bushing is specified.Type: ApplicationFiled: September 28, 2021Publication date: March 31, 2022Applicant: ABB Power Grids Switzerland AGInventors: Samuel BRODERICK, Peter SJOBERG, Jan CZYZEWSKI
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Patent number: 11270817Abstract: A bushing including: a bushing comprising: a bushing body, an electrode contained in the bushing body, a flange body mounted to the bushing body, a tap assembly including: a hollow electrically conductive sleeve portion extending from the flange body, a conductor connected to the electrode and extending from the electrode into the sleeve portion, a pin connected to the conductor, an insulating body provided around the conductor in the sleeve portion, and an electrically conductive lid configured to be assembled with the sleeve portion, the lid having a cap portion and a hollow cylindrical extension portion, wherein the cap portion is configured to receive an end portion of the pin, wherein the extension portion extends axially from the cap portion and is configured to be received by the sleeve portion, and wherein the extension portion is configured to surround the insulating body in the sleeve portion when the lid is assembled with the sleeve portion.Type: GrantFiled: March 22, 2019Date of Patent: March 8, 2022Assignee: HITACHI ENERGY SWITZERLAND AGInventors: Peter Sjöberg, Björn Edberg, Kenneth Johansson, Jan-Åke Börjesson
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Patent number: 11269002Abstract: A high-voltage lead-through device includes an insulator body having a solid exterior and including insulation, a main conductor passing therethrough, a sensor adjacent the main conductor inside the insulator body measuring a physical property of the device and a communication unit adjacent the main conductor outside the insulator body, wherein the main conductor has a first electric potential, a section of the solid exterior of the insulator body faces a second electric potential, the communication unit is connected to the sensor using a signal conductor as a first electrical communication medium and the communication unit employs a different communication medium for communicating with a data distribution device at a third electric potential.Type: GrantFiled: November 15, 2019Date of Patent: March 8, 2022Assignee: Hitachi Energy Switzerland AGInventors: Cecilia Forssén, Joachim Schiessling, Peter Sjöberg, Andrew Maxwell
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Publication number: 20220006208Abstract: A condenser core for being positioned around a high voltage main electrical conductor, the condenser core including an electrically insulating body; a longitudinal through hole for accommodating the main electrical conductor; a plurality of electrically conductive foils encircling the through hole and being surrounded by the body such that each foil is insulated from any other of the foils; a potential electrical conductor for establishing an electrical connection between one of the foils and the main electrical conductor when the main electrical conductor is accommodated in the through hole; and a fastening device configured to mechanically connect the potential electrical conductor to the main electrical conductor when the main electrical conductor is accommodated in the through hole. A bushing, a high voltage application and a method of producing a bushing are also provided.Type: ApplicationFiled: September 18, 2019Publication date: January 6, 2022Inventors: Björn Edberg, Thomas Eriksson, Peter Sjöberg
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Publication number: 20210356509Abstract: A high-voltage lead-through device includes an insulator body having a solid exterior and including insulation, a main conductor passing therethrough, a sensor adjacent the main conductor inside the insulator body measuring a physical property of the device and a communication unit adjacent the main conductor outside the insulator body, wherein the main conductor has a first electric potential, a section of the solid exterior of the insulator body faces a second electric potential, the communication unit is connected to the sensor using a signal conductor as a first electrical communication medium and the communication unit employs a different communication medium for communicating with a data distribution device at a third electric potential.Type: ApplicationFiled: November 15, 2019Publication date: November 18, 2021Inventors: Cecilia Forssén, Joachim Schiessling, Peter Sjöberg, Andrew Maxwell
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Publication number: 20210159682Abstract: A flange fitted around a round cylindrical condenser core of a bushing is described. The flange comprises an annular lower flange part arranged to fit around a radial shoulder of the condenser core such that a lower shoulder chamfer of the shoulder rests against lower flange chamfer of the lower flange part around the circumference of the condenser core; and an annular upper flange part fastened to the lower flange part and fits around the condenser core above an upper shoulder chamfer of the shoulder. An upper flange chamfer of the upper flange part is between an upper sealing element and a lower sealing element, forming an annular chamfer space is formed between the upper flange chamfer and the upper shoulder chamfer between the upper and lower sealing elements. The flange comprises an injection through hole for a filler material to be injected there through to fill the chamfer space.Type: ApplicationFiled: May 30, 2019Publication date: May 27, 2021Inventors: Peter Sjöberg, Jakob Emmel, Jan Czyzewski, Ansgar Dais, Fabian Stacy, Leif Roosgardh
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Publication number: 20210143627Abstract: The invention is concerned with a bushing for high voltage applications and a bushing arrangement including such a bushing. The bushing includes a conductor defining a longitudinal axis (A) through the bushing where the bushing has a central section and a first and a second peripheral section on opposite sides of the central section along the longitudinal axis (A) and includes an optical fibre with a first part (P1) stretching through the central section, the fibre being adapted to detect physical properties being influenced or caused by the operation of the bushing. The sections are sections of a solid condenser core and the bushing further includes an enclosure for a length of fibre that is to exit the bushing, the enclosure being buried in the central section adjacent the surface of the condenser core and having an interior.Type: ApplicationFiled: April 25, 2019Publication date: May 13, 2021Applicant: ABB Power Grids Switzerland AGInventors: Roger HEDLUND, Peter SJÖBERG
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Patent number: 10937597Abstract: A high voltage capacitive device having: a non-impregnatable film having a plurality of physically separated regions each defined by a conductive coating provided on the non-impregnatable film, wherein the non-impregnatable film is wound in a plurality of turns to form a plurality of layers, wherein the regions are arranged in overlapping layers in the radial direction, wherein the non-impregnatable film forms a dielectric between adjacent layers of the regions, and wherein the conductive coating of at least some of the regions is provided with a plurality of first radial openings extending through the conductive coating to the non-impregnatable film, which delimits a radial extension of each first radial opening.Type: GrantFiled: June 19, 2018Date of Patent: March 2, 2021Assignee: ABB Schweiz AGInventors: Cecilia Forssen, Francisco Penayo, Joachim Schiessling, Nils Lavesson, Peter Sjöberg, Roger Hedlund, Ylva Granbom, Peter Dyreklev, Staffan Nordlinder
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Publication number: 20210043339Abstract: Embodiments of the present disclosure relate to a sealing arrangement of a bushing for a power electrical device and a bushing comprising the sealing arrangement. The sealing arrangement includes a top cover; a central conductor going through the top cover; a guide element having a cylinder portion and a flange portion extended from a middle part of the cylinder portion, wherein the cylinder portion is arranged between the top cover and the central conductor, and the flange portion is connected onto the top cover; a static sealing structure provided between the guide element and the top cover; and a dynamic sealing structure provided between the guide element and the central conductor. With the new sealing structure design, it could provide a good sealing performance so that the bushing can be used in various environments.Type: ApplicationFiled: January 23, 2018Publication date: February 11, 2021Inventors: Claes Peter SJÖBERG, Natalia GUTMAN, Danan YAO, Peirong CAI
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Publication number: 20210027919Abstract: A bushing including: a bushing comprising: a bushing body, an electrode contained in the bushing body, a flange body mounted to the bushing body, a tap assembly including: a hollow electrically conductive sleeve portion extending from the flange body, a conductor connected to the electrode and extending from the electrode into the sleeve portion, a pin connected to the conductor, an insulating body provided around the conductor in the sleeve portion, and an electrically conductive lid configured to be assembled with the sleeve portion, the lid having a cap portion and a hollow cylindrical extension portion, wherein the cap portion is configured to receive an end portion of the pin, wherein the extension portion extends axially from the cap portion and is configured to be received by the sleeve portion, and wherein the extension portion is configured to surround the insulating body in the sleeve portion when the lid is assembled with the sleeve portion.Type: ApplicationFiled: March 22, 2019Publication date: January 28, 2021Applicant: ABB Power Grids Switzerland AGInventors: Peter SJÖBERG, Björn EDBERG, Kenneth JOHANSSON, Jan-Åke BÖRJESSON
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Publication number: 20200126732Abstract: A high voltage capacitive device having: a non-impregnatable film having a plurality of physically separated regions each defined by a conductive coating provided on the non-impregnatable film, wherein the non-impregnatable film is wound in a plurality of turns to form a plurality of layers, wherein the regions are arranged in overlapping layers in the radial direction, wherein the non-impregnatable film forms a dielectric between adjacent layers of the regions, and wherein the conductive coating of at least some of the regions is provided with a plurality of first radial openings extending through the conductive coating to the non-impregnatable film, which delimits a radial extension of each first radial opening.Type: ApplicationFiled: June 19, 2018Publication date: April 23, 2020Applicant: ABB Schweiz AGInventors: Cecilia Forssen, Francisco Penayo, Joachim Schiessling, Nils Lavesson, Peter Sjöberg, Roger Hedlund, Ylva Granbom, Peter Dyreklev, Staffan Nordlinder