Patents by Inventor Jan-Erik Eriksson
Jan-Erik Eriksson 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: 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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Publication number: 20120199308Abstract: A method for casting of metal. A mold is provided including two broad sides and two narrow sides. A molten metal is introduced into the mold. There is a meniscus at a top of the molten metal. Additional molten metal is supplied into the molten metal via a casting tube below the meniscus. At least one stirrer including an iron core and a coil applied around the iron core is arranged around the mold. A length of the iron core in relation to a length of the broad side of the mold is between 50% and 80% of the length of the broad side. An upper part of the iron core is positioned from 50 mm above to 195 mm below the surface of the meniscus. A magnetic field is applied to the molten metal with the at least one stirrer to stir the molten metal.Type: ApplicationFiled: February 22, 2012Publication date: August 9, 2012Applicant: ABB ABInventors: Sten KOLLBERG, Jan-Erik Eriksson
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Publication number: 20120167629Abstract: An apparatus for crystallization of silicon includes a crucible for containing silicon, a heating and heat dissipating arrangement provided for melting the silicon contained in the crucible and for subsequently solidifying the molten silicon, and an electromagnetic stirring device provided for stirring the molten silicon in the crucible during the solidification of the molten silicon. A control arrangement is provided for controlling the heating and heat dissipating arrangement to solidify the molten silicon at a specified solidification rate and for controlling the electromagnetic stirring device to stir the molten silicon in response to the specified solidification rate of the molten silicon such that the ratio of a speed of the molten silicon and the specified solidification rate is above a first threshold value.Type: ApplicationFiled: March 15, 2012Publication date: July 5, 2012Inventors: Jan-Erik Eriksson, Olof Hjortstam, Ulf Sand
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Patent number: 8151867Abstract: A continuous casting device, including a mould, an electromagnetic device arranged outside the mould and arranged to provide an electromagnetic field acting on a melt in the mould, the electromagnetic device being supplied with electric current includes a base frequency and harmonics, and thereby providing a first electromagnetic field based on the base frequency and a second electromagnetic field based on the harmonics, and an inductive sensor, arranged at the mould for the purpose of sensing the position of a meniscus of the melt, and operating at frequencies corresponding to the harmonics. The continuous casting device includes at least one screen between the electromagnetic device and the sensor, and the screen is arranged so as to prevent the second electromagnetic field from disturbing the operation of the sensor but to permit the first electromagnetic field to act on the melt in the region of the meniscus.Type: GrantFiled: June 17, 2011Date of Patent: April 10, 2012Assignee: ABB ABInventors: Boo Eriksson, Jan-Erik Eriksson, Christopher Curran
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Publication number: 20110297345Abstract: A continuous casting device, including a mould, an electromagnetic device arranged outside the mould and arranged to provide an electromagnetic field acting on a melt in the mould, the electromagnetic device being supplied with electric current includes a base frequency and harmonics, and thereby providing a first electromagnetic field based on the base frequency and a second electromagnetic field based on the harmonics, and an inductive sensor, arranged at the mould for the purpose of sensing the position of a meniscus of the melt, and operating at frequencies corresponding to the harmonics. The continuous casting device includes at least one screen between the electromagnetic device and the sensor, and the screen is arranged so as to prevent the second electromagnetic field from disturbing the operation of the sensor but to permit the first electromagnetic field to act on the melt in the region of the meniscus.Type: ApplicationFiled: June 17, 2011Publication date: December 8, 2011Inventors: Boo Eriksson, Jan-Erik Eriksson, Christopher Curran
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Patent number: 8062711Abstract: A device for stabilizing an elongated steel sheet when continuously transporting the steel sheet in a transport direction along a predetermined transport path. The device includes at least a first pair, a second pair and a third pair of electromagnets with at least one electromagnet on each side of the steel sheet. The electromagnets are adapted to stabilize the steel sheet with respect to the predetermined transport path. The first and second electromagnets are elongated in a direction essentially perpendicular to the transport direction. The first and second electromagnets are substantially arranged on each side of a longitudinal center line for the steel sheet. The center line is essentially parallel to the transport direction. The third electromagnet is arranged adjacent to the center line.Type: GrantFiled: March 23, 2006Date of Patent: November 22, 2011Assignee: ABB Research Ltd.Inventors: Peter Löfgren, Jan-Erik Eriksson, Mats Molander, Carl-Fredrik Lindberg, Conny Svahn
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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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Patent number: 7975753Abstract: Method for controlling a flow of molten steel in a mould by applying at least one magnetic field to the molten steel in a continuous slab casting machine. Controlling a molten steel flow velocity on a molten steel bath surface to a predetermined molten steel flow velocity by applying a static magnetic field to impart a stabilizing and braking force to a discharge flow from an immersion nozzle when the molten steel flow velocity on the meniscus is higher than a mould powder entrainment critical flow velocity. Controlling the molten steel flow velocity on the meniscus to a range of from an inclusion adherence critical flow velocity or more to a mould powder entrainment critical flow velocity or less by applying a shifting magnetic field to increase the molten steel flow when the molten steel flow velocity on the meniscus is lower than the inclusion-adherence critical flow velocity.Type: GrantFiled: January 6, 2009Date of Patent: July 12, 2011Assignee: ABB ABInventors: Anders Lehman, Helmut Hackl, Jan-Erik Eriksson, Olof Sjoden
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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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Patent number: 7669638Abstract: A control system for regulating the flow of liquid metal in a device for casting a metal. A detector measures a process variable. A control unit evaluates data from the detector. At least one process parameter is automatically varied in order to optimize casting conditions. The detector measures a characteristic of the meniscus at at least two points on the meniscus instantaneously throughout the casting process.Type: GrantFiled: November 28, 2003Date of Patent: March 2, 2010Assignee: ABB ABInventors: Sten Kollberg, Jan-Erik Eriksson, Carl-Fredrik Lindberg, Mats Molander, Peter Löfgren, Göte Tallbäck, Rebei Bel Fdhila, Bertil Samuelsson, Stefan Israelsson Tampe, Christina Wallin
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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: 20090255642Abstract: A device for casting of metal. The device includes a mold, a casting tube via which molten metal is supplied to molten metal in the mold in a region at a distance below a meniscus of the molten metal, and at least one stirrer including an iron core and a coil arranged around the iron core. The iron core is arranged to be elongated along the broad side of the mold and adapted to apply a magnetic field to the molten metal for stirring the melted metal. An upper part of the iron core is positioned at a distance from the meniscus of from 50 mm above the surface of the meniscus to 195 mm below the surface. The length of the iron core in relation to the length of the broad side of the mold is between at least 50% and 80% of the length of the broad side.Type: ApplicationFiled: April 25, 2007Publication date: October 15, 2009Applicant: ABB ABInventors: Sten Kollberg, Jan-Erik Eriksson
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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: 20090175708Abstract: A device for stabilizing an elongated steel sheet when continuously transporting the steel sheet in a transport direction along a predetermined transport path. The device includes at least a first pair, a second pair and a third pair of electromagnets with at least one electromagnet on each side of the steel sheet. The electromagnets are adapted to stabilize the steel sheet with respect to the predetermined transport path. The first and second electromagnets are elongated in a direction essentially perpendicular to the transport direction. The first and second electromagnets are substantially arranged on each side of a longitudinal center line for the steel sheet. The center line is essentially parallel to the transport direction. The third electromagnet is arranged adjacent to the center line.Type: ApplicationFiled: March 23, 2006Publication date: July 9, 2009Applicant: ABB Research Ltd.Inventors: Peter Lofgren, Jan-Erik Eriksson, Mats Molander, Carl-Fredrik Lindberg, Conny Svahn
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Publication number: 20090120604Abstract: A method for controlling a flow of molten steel in a mould by applying at least one magnetic field to the molten steel in a continuous slab casting machine. This is achieved by comprising controlling a molten steel flow velocity on a molten steel bath surface, meniscus, to a predetermined molten steel flow velocity by applying a static magnetic field to impart a stabilizing and braking force to a discharge flow from an immersion nozzle when the molten steel flow velocity on the meniscus is higher than a mould powder entrainment critical flow velocity and by controlling the molten steel flow velocity on the meniscus to a range of from an inclusion adherence critical flow velocity or more to a mould powder entrainment critical flow velocity or less by applying a shifting magnetic field to increase the molten steel flow when the molten steel flow velocity on the meniscus is lower than the inclusion-adherence critical flow velocity.Type: ApplicationFiled: January 6, 2009Publication date: May 14, 2009Inventors: Anders Lehman, Helmut Hackl, Jan-Erik Eriksson, Olof Sjoden
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Publication number: 20080104491Abstract: A communications method useable to safely communicate a message or a signal from a first safety approved entity (210) to a second safety approved entity (230) via a third, non-safety approved entity (220) comprising that each command is sent with the aid of a command message from the first to the second entity, an acknowledge message from the second to the first entity, and a go-ahead message from the first to the second entity.Type: ApplicationFiled: March 23, 2007Publication date: May 1, 2008Applicant: SAAB ABInventors: Rikard Johansson, Jan-Erik Eriksson, Peter Stendahl
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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: 7305271Abstract: A computer program product for controlling an apparatus for continuous casting of metals. The computer program product includes a computer readable medium and computer program instructions recorded on the computer readable medium executable by a processor for performing the steps of supplying a molten metal to a casting mold with an elongated horizontal cross section, applying at least one magnetic field to the to exert an influence on the movement of the molten metal, generating a stationary magnetic field with a variable strength across the elongated cross section of the casting mold in the vicinity of, or below, where the molten metal is supplied, and generating a variable magnetic field in an area of the upper surface of molten metal in a region that is centrally located with respect to the elongated cross section and in the vicinity of where the molten metal is supplied.Type: GrantFiled: July 29, 2005Date of Patent: December 4, 2007Assignee: ABB ABInventor: Jan-Erik Eriksson
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Publication number: 20070260967Abstract: A method of detecting communications errors by coding messages as pictures is provided. Also provided is a communications method useable to safely communicate a message or a signal from a first safety approved entity (210) to a second safety approved entity (230) via a third, non-safety approved entity (220), comprising that each command is sent with the aid of a command message from the first to the second entity, an acknowledge message from the second to the first entity, and a go-ahead message from the first to the second entity.Type: ApplicationFiled: March 27, 2007Publication date: November 8, 2007Applicant: SAAB ABInventors: Rikard Johansson, Jan-Erik Eriksson, Peter Stendahl
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Publication number: 20070018052Abstract: A system for in-flight control of an aerial vehicle (2) including an on-board flight control system (5), a remote control station (4) and a read-only digital representation of a subset of the airspace. The flight control system (5) and the remote control station (4) each comprises the digital representation. The digital representation comprises data for an allowed airspace (3) and at least one mission airspace (11) within the allowed airspace (3). The flight control system (5) is arranged to operate the aerial vehicle (2) within the mission airspace (11) under control of the remote control station (4).Type: ApplicationFiled: July 1, 2005Publication date: January 25, 2007Applicant: SAAB ABInventor: Jan-Erik Eriksson