Patents by Inventor Bengt Rydholm
Bengt Rydholm 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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Publication number: 20240173766Abstract: The present invention provides a tundish for continuous casting, the tundish having an inner volume including an inlet portion including an inlet for receiving molten metal, an outlet portion including at least one outlet for discharging molten metal, and a flow separator. The tundish further includes an EMS stirrer for electromagnetic stirring, wherein, the flow separator is positioned between the inlet portion and the outlet portion, the EMS stirrer is disposed outside of the tundish, at a vertical position below the top of the inner volume of the tundish and above the bottom of the inner volume of the tundish, the EMS stirrer is disposed to make the molten metal in the outlet portion flow in a horizontal direction, and the flow which is directly induced by the EMS stirrer flows away from the inlet.Type: ApplicationFiled: March 25, 2021Publication date: May 30, 2024Inventors: Hongliang Yang, Bengt Rydholm, Lidong Teng, Monika Zielinska
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Patent number: 10919088Abstract: A method of controlling an electromagnetic stirrer arranged around a submerged entry nozzle (SEN) of a tundish provided with a stopper rod to control throughput of the tundish, the SEN being configured to provide tapping of molten metal from the tundish and the electromagnetic stirrer being configured to generate a rotating magnetic field in the SEN, wherein the method includes controlling the electromagnetic stirrer to operate only when a gas flow rate through the stopper rod is in a first range of 1.5 NL/min to 20 NL/min.Type: GrantFiled: January 23, 2018Date of Patent: February 16, 2021Assignees: ABB Schweiz AG, ArcelorMittalInventors: Bengt Rydholm, Fredrik Sandberg, Hongliang Yang, Jan-Erik Eriksson, Jean-Marie Galpin, Bruno Langlet, Jean-Luc Curé, Nicolas Triolet, Thierry Lecoester
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Patent number: 10875090Abstract: An assembly for a metal-making process, having: a tundish, a submerged entry nozzle (SEN) configured to provide tapping of molten metal from the tundish, and an electromagnetic stirrer arranged around the SEN, the electromagnetic stirrer having a closed and integral SEN-enclosing portion provided with coils for generating a rotating electromagnetic field in the SEN, the SEN-enclosing portion providing a circumferentially closed and integral annular passage through which the SEN extends, wherein the electromagnetic stirrer is immovably mounted relative to the tundish and relative to the SEN.Type: GrantFiled: November 23, 2017Date of Patent: December 29, 2020Assignees: ABB Schweiz AG, ArcelorMittalInventors: Jan-Erik Eriksson, Jean-Marie Galpin, Bengt Rydholm, Hongliang Yang, Jean-Luc Curé, Nicolas Triolet, Bruno Langlet, Fredrik Sandberg
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Publication number: 20200188994Abstract: A method of controlling an electromagnetic stirrer arranged around a submerged entry nozzle (SEN) of a tundish provided with a stopper rod to control throughput of the tundish, the SEN being configured to provide tapping of molten metal from the tundish and the electromagnetic stirrer being configured to generate a rotating magnetic field in the SEN, wherein the method includes controlling the electromagnetic stirrer to operate only when a gas flow rate through the stopper rod is in a first range of 1.5 NL/min to 20 NL/min.Type: ApplicationFiled: January 23, 2018Publication date: June 18, 2020Inventors: Bengt Rydholm, Fredrik Sandberg, Hongliang Yang, Jan-Erik Eriksson, Jean-Marie Galpin, Bruno Langlet, Jean-Luc Curé, Nicolas Triolet, Thierry Lecoester
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Publication number: 20190314892Abstract: An assembly for a metal-making process, having: a tundish, a submerged entry nozzle(SEN) configured to provide tapping of molten metal from the tundish, and an electromagnetic stirrer arranged around the SEN, the electromagnetic stirrer having a closed and integral SEN-enclosing portion provided with coils for generating a rotating electromagnetic field in the SEN, the SEN-enclosing portion providing a circumferentially closed and integral annular passage through which the SEN extends, wherein the electromagnetic stirrer is immovably mounted relative to the tundish and relative to the SEN.Type: ApplicationFiled: November 23, 2017Publication date: October 17, 2019Inventors: Jan-Erik Eriksson, Jean-Marie Galpin, Bengt Rydholm, Hongliang Yang, Jean-Luc Curé, Nicolas Triolet, Bruno Langlet, Fredrik Sandberg
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Patent number: 8336605Abstract: A continuous casting device includes a mould, a nozzle, and an electromagnetic stirrer provided around the nozzle above the mould, the stirrer including a core of a magnetic material that extends circumferentially around the nozzle and a plurality of windings wound around the core. The windings are wound around a cross section of the core as seen in the circumferential direction of the core.Type: GrantFiled: May 27, 2009Date of Patent: December 25, 2012Assignee: ABB ABInventors: Jan-Erik Eriksson, Eleonor Olsson, Bengt Rydholm, Helmut Hackl
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Patent number: 8043403Abstract: A furnace plant including at least one furnace vessel comprising side walls, a bottom and a roof. At least one heater is configured to heat metal in the furnace vessel. A compartment includes sidewalls lined with refractory material. The compartment forms an extension of the furnace vessel. At least one electromagnetic stirrer is arranged outside and adjacent to the compartment. A refractory plate is arranged inside the compartment. The refractory plate includes an upper edge configured to be positioned below a meniscus of molten metal and includes a lower edge positioned spaced apart from a bottom of the compartment. The plate is arranged such that a gap between the plate and a wall of the compartment increases toward the bottom of the compartment.Type: GrantFiled: October 9, 2008Date of Patent: October 25, 2011Assignee: ABB ABInventors: Bengt Rydholm, Erik Svensson, Alf Lundström, Helmut Hackl, Olof Sjödén, Jan-Erik Eriksson, Tord Kroon, Tord Lindblad
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Publication number: 20100236362Abstract: A furnace plant including at least one furnace vessel comprising side walls, a bottom and a roof. At least one heater is configured to heat metal in the furnace vessel. A compartment includes sidewalls lined with refractory material. The compartment forms an extension of the furnace vessel. At least one electromagnetic stirrer is arranged outside and adjacent to the compartment. A refractory plate is arranged inside the compartment. The refractory plate includes an upper edge configured to be positioned below a meniscus of molten metal and includes a lower edge positioned spaced apart from a bottom of the compartment. The plate is arranged such that a gap between the plate and a wall of the compartment increases toward the bottom of the compartment.Type: ApplicationFiled: October 9, 2008Publication date: September 23, 2010Applicant: ABB ABInventors: Bengt Rydholm, Erik Svensson, Alf Lundström, Helmut Hackl, Olof Sjödén, Jan-Erik Eriksson, Tord Kroon, Tord Lindblad
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Publication number: 20090294091Abstract: A continuous casting device includes a mould, a nozzle, and an electromagnetic stirrer provided around the nozzle above the mould, the stirrer including a core of a magnetic material that extends circumferentially around the nozzle and a plurality of windings wound around the core. The windings are wound around a cross section of the core as seen in the circumferential direction of the core.Type: ApplicationFiled: May 27, 2009Publication date: December 3, 2009Inventors: Jan-Erik Eriksson, Bengt Rydholm, Eleonor Olsson, Helmut Hackl
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Publication number: 20090208665Abstract: A device for controlling the thickness of a metallic coating on an elongated metallic element formed by continuously transporting the element through a bath of molten metal. The device includes at least one pair of electromagnetic wiper members and a second wiper member associated with the at least one pair of electromagnetic wiper members. The second wiper member is designed to apply to the element a jet of gas with a target area essentially according to a line transversely of the element with respect to the direction of the transport path in order to assist the electromagnetic wiper member in the wiping of superfluous molten metal from the element.Type: ApplicationFiled: June 19, 2006Publication date: August 20, 2009Applicant: ABB ABInventors: Jan Erik Eriksson, Conny Svahn, Rebei Bel Fdhila, Bengt Rydholm
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Publication number: 20080044584Abstract: A device and a method for stabilizing an elongated metallic strip of a magnetic material when coating the strip with a metallic layer. The strip is transported from the bath in a direction of transport along a predetermined transport path. A wiping device for wiping off superfluous molten metal from the strip applies an air flow in a line across the strip, where the wiping device includes at least one pair of air-knives arranged with one air-knife on each side of the strip. An electromagnetic stabilizing device stabilizes the position of the strip with respect to the predetermined transport path. A sensor detects the position of the strip in relation to the predetermined transport path.Type: ApplicationFiled: June 23, 2005Publication date: February 21, 2008Applicant: ABB ABInventors: Jan-Erik Eriksson, Conny Svahn, Mats Molander, Carl-Fredrik Lindberg, Peter Lofgren, Stefan Israelsson Tampe, Bengt Rydholm
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Patent number: 7187532Abstract: A device and a method for stabilising a metallic object of magnetic material. The metallic object is transported along a transportation path or plane. The plane includes a transportation direction and is parallel to the longitudinal direction of the object therein. A sensor is arranged to sense the valve of a parameter depending on the position of the object with respect to the plane. An electromagnetic actuator is arranged to apply a magnetic force to the object in respone to the sensed position. The magnetic force has a force component directed transversely to the transportation direction and transversely to the plane.Type: GrantFiled: August 10, 2001Date of Patent: March 6, 2007Assignee: ABB ABInventors: Per Lennart Eriksson, Bengt Rydholm, Sven Karlsson, Magnus Hallbäck, Göte Tallbäck
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Publication number: 20050274435Abstract: A device and a method for stabilising a metallic object of magnetic material. The metallic object is transported along a transportation path or plane. The plane includes a transportation direction and is parallel to the longitudinal direction of the object therein. A sensor is arranged to sense the valve of a parameter depending on the position of the object with respect to the plane. An electromagnetic actuator is arranged to apply a magnetic force to the object in respone to the sensed position. The magnetic force has a force component directed transversely to the transportation direction and transversely to the plane.Type: ApplicationFiled: August 10, 2001Publication date: December 15, 2005Inventors: Per Eriksson, Bengt Rydholm, Sven Karlsson, Magnus Hallback, Gote Tallback
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Patent number: 6972505Abstract: A rotating electrical machine and method for making the machine, where the machine includes a high-voltage stator winding and elongated support devices for supporting the winding. The machine and method employ an arrangement of cable that is made of inner conductive strands, covered with a first semiconducting layer, which is covered with an insulating layer, which is covered with a second semiconducting layer. The cable is wound in slots in the stator such that separate cable lead-throughs are positioned in specific arrangements with respect to each other and in slots of the stator. The arrangement of the cable in the stator protects the integrity of the respective components in the cable and particularly the second semiconducting layer.Type: GrantFiled: May 27, 1997Date of Patent: December 6, 2005Assignee: ABBInventors: Mats Leijon, Peter Templin, Bengt Rydholm, Lars Gertmar, Bertil Larsson, Bengt Rothman, Peter Carstensen, Leif Johansson, Claes Ivarson, Bo Hernnas, Goran Holmstrom, Bengt Goran, Alberti Backlund
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Patent number: 6894416Abstract: The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by at least one outer and one inner semiconducting layer (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The stator winding may be produced with full or fractional slot winding, the phases of the winding being Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter. The invention also relates to a hydro-generator plant, a generator included in the plant and a procedure for building such a plant.Type: GrantFiled: May 27, 1997Date of Patent: May 17, 2005Assignee: ABB ABInventors: Mats Leijon, Bo Hernnäs, Peter Carstensen, Mons Hölleland, Peter Templin, Lars Gertmar, Claes Ivarson, Erland Sörensen, Gunnar Davidsson, Gunnar Kylander, Bertil Larsson, Sören Berggren, Bertil Berggren, Jan-Anders Nygren, Bengt Rydholm, Hans-Olof Kalldin
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Publication number: 20030094304Abstract: An insulated conductor for high-voltage windings and electric machine, and rotating electric machine that use the insulated conductor. The insulated conductor is suitable for use in a high-voltage winding application for devices such as an electric machine and a rotating electric machine. A feature of the insulated conductor is that the conductor includes at least one strand, and an inner conductive layer that surrounds the at least one strand. An insulating layer surrounds the inner conductive layer, and an outer conductive layer surrounds the insulating layer. When arranged in this manner, and when the outer conductive layer is suitably configured to provide an equipotential surface, the insulated conductor provides relatively high resistance to breakdown when operating at high voltages.Type: ApplicationFiled: February 2, 1999Publication date: May 22, 2003Inventors: MATS LEIJON, LI MING, GUNNAR KYLANDER, PETER CARTENSEN, BENGT RYDHOLM, PER ANDERSSON, PETER TEMPLIN
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Publication number: 20020053461Abstract: A conductor for high-voltage windings comprising a stranded conductor core surrounded an electrical high-voltage insulation comprising an inner semi-conducting layer, an insulating layer and an outer semi-conducting layer. The core being designed to ensure uniform current distribution and to counteract eddy-current losses This is achieved by an electrically insulating oxide layer being provided on a sufficient number of strands to ensure that all strands in the stranded conductor core are electrically insulated from each other.Type: ApplicationFiled: March 2, 1999Publication date: May 9, 2002Inventors: MATS LEIJON, KENNETH JOHANNESSON, STEFAN MILTON, PETER CARSTENSEN, BENGT RYDHOLM, BO HERNNAS, VIJAYA CHANDRAMOULI
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Patent number: 6376775Abstract: A conductor and a rotating electric high-voltage machine that includes the conductor has a cable configured for high-voltage operation. The cable may be included as a winding for the rotating electric high-voltage machine. The conductor includes a first strand that is clad with an electrically insulating layer, and a second strand that is uninsulated whereas the first strand and the second strand are arranged in two or more layers of strands. The two or more layers of strands are insulated from one another. Furthermore, the first and second layers of the two or more layers of strands are arranged around a central core where the central core is at least one of an air core and a core of another material. The second strand is positioned so as not to be electrically contacting any other uninsulated strand.Type: GrantFiled: February 9, 1999Date of Patent: April 23, 2002Assignee: ABB ABInventors: Mats Leijon, Kenneth Johannesson, Stefan Milton, Peter Carstensen, Bengt Rydholm
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Patent number: 5402026Abstract: A rotor for short-circuited alternating current motors, having a pack of circular rotor blades fixedly mounted on a shaft, the plates have, uniformly around the peripheral edges thereof, a number of recesses which, when the plates are packed, form generally axially extending rotor slots, and each rotor slot includes a first recess or cavity whose peripheral edge forms a closed contour and which accommodates a conductor radially inwards of the mantle surface of the rotor, the peripheral edge of said first recess has a concavity which faces towards said peripheral edge, and a second recess which forms a radially extending slot which extends from a point close to the concavity and out towards said peripheral edge, a bridge is formed between the first recess and the second recess, and the second recess has a widened part which is located between the concavity of the first recess and the peripheral edge.Type: GrantFiled: October 1, 1993Date of Patent: March 28, 1995Assignee: Asea Brown Boveri ABInventors: Lars Gertmar, Bengt Rydholm, Chandur Sadarangani, Jens P. Zinck