Patents by Inventor Fredrik Boxberg
Fredrik Boxberg 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: 20240030763Abstract: Permanent magnet rotors for electric motors, particularly electric motors for use in compressors, improve the electromagnetic efficiency of the motor. The rotors can include retention of surface permanent magnets using one or more of retaining features on the motor and/or pole spacers interfacing with corresponding features on a rotor core, the use of a monolithic magnet in the rotor, and/or use of a carbon fiber sleeve. The rotor can include an eddy current shield, disposed on the rotor core, on a surface of the rotor, or located within a sleeve surrounding the rotor. The rotor can be sized such that an air-gap between the rotor and a stator of a motor using the rotor is a predetermined amount that reduces electromagnetic losses such as eddy current losses.Type: ApplicationFiled: August 7, 2023Publication date: January 25, 2024Inventors: Fredrik Boxberg, Charles J. Peterson, Yubo Nian, Petri J. Mäki-Ontto, Lauri Juhani Salmia, Russell T. Abbott, Tomas Fajt, Seth M. McGill
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Publication number: 20230339020Abstract: Systems and methods form induction rotors by performing isostatic pressing (HIP) to weld clad to a shaft, which allows for scaling the manufacturing of solid steel rotors, as compared to conventional techniques. In examples, the rotors are designed for high-speed motors and may include recessed short circuit rings and/or end rings. An exemplary process molds an alloy powder into cladding such that heretofore unachievable rotor designs are achievable according to systems and methods described herein. In examples, a thin source-layer is introduced to welding zones, thereby enriching and strengthening the resulting joint at welding zones. The source-layer may be introduced by adding an intermediate layer comprising the source material between the materials being welded. The reduced alloy-depletion welding disclosed herein strengthens the welding area joints and provides for the manufacture of component designs, which were previously unachievable due to alloy-depletion weaknesses and environmental constraints.Type: ApplicationFiled: June 28, 2023Publication date: October 26, 2023Inventors: Fredrik Boxberg, Juha T. Saari, Esa H. M. Vikman
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Patent number: 11724311Abstract: Systems and methods form induction rotors by performing isostatic pressing (HIP) to weld clad to a shaft, which allows for scaling the manufacturing of solid steel rotors, as compared to conventional techniques. In examples, the rotors are designed for high-speed motors and may include recessed short circuit rings and/or end rings. An exemplary process molds an alloy powder into cladding such that heretofore unachievable rotor designs are achievable according to systems and methods described herein. In examples, a thin source-layer is introduced to welding zones, thereby enriching and strengthening the resulting joint at welding zones. The source-layer may be introduced by adding an intermediate layer comprising the source material between the materials being welded. The reduced alloy-depletion welding disclosed herein strengthens the welding area joints and provides for the manufacture of component designs, which were previously unachievable due to alloy-depletion weaknesses and environmental constraints.Type: GrantFiled: September 26, 2019Date of Patent: August 15, 2023Assignee: Ingersoll-Rand Industrial U.S., Inc.Inventors: Fredrik Boxberg, Juha T. Saari, Esa H. M. Vikman
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Patent number: 11722025Abstract: Permanent magnet rotors for electric motors, particularly electric motors for use in compressors, improve the electromagnetic efficiency of the motor. The rotors can include retention of surface permanent magnets using one or more of retaining features on the motor and/or pole spacers interfacing with corresponding features on a rotor core, the use of a monolithic magnet in the rotor, and/or use of a carbon fiber sleeve. The rotor can include an eddy current shield, disposed on the rotor core, on a surface of the rotor, or located within a sleeve surrounding the rotor. The rotor can be sized such that an air-gap between the rotor and a stator of a motor using the rotor is a predetermined amount that reduces electromagnetic losses such as eddy current losses.Type: GrantFiled: December 31, 2020Date of Patent: August 8, 2023Assignee: TRANE INTERNATIONAL INC.Inventors: Fredrik Boxberg, Charles J. Peterson, Yubo Nian, Petri J. Mäki-Ontto, Lauri Juhani Salmia, Russell T. Abbott, Tomas Fajt, Seth M. McGill
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Publication number: 20230235785Abstract: An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.Type: ApplicationFiled: February 28, 2023Publication date: July 27, 2023Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Maki-Ontto, Lauri Juhani Salmia
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Patent number: 11592060Abstract: An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.Type: GrantFiled: December 28, 2021Date of Patent: February 28, 2023Assignee: Ingersoll-Rand Industrial U.S., Inc.Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Maki-Ontto, Lauri Juhani Salmia
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Publication number: 20220209598Abstract: Permanent magnet rotors for electric motors, particularly electric motors for use in compressors, improve the electromagnetic efficiency of the motor. The rotors can include retention of surface permanent magnets using one or more of retaining features on the motor and/or pole spacers interfacing with corresponding features on a rotor core, the use of a monolithic magnet in the rotor, and/or use of a carbon fiber sleeve. The rotor can include an eddy current shield, disposed on the rotor core, on a surface of the rotor, or located within a sleeve surrounding the rotor. The rotor can be sized such that an air-gap between the rotor and a stator of a motor using the rotor is a predetermined amount that reduces electromagnetic losses such as eddy current losses.Type: ApplicationFiled: December 31, 2020Publication date: June 30, 2022Inventors: Fredrik Boxberg, Charles J. Peterson, Yubo Nian, Petri J. Mäki-Ontto, Lauri Juhani Salmia, Russell T. Abbott, Tomas Fajt, Seth M. McGill
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Publication number: 20220120317Abstract: An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.Type: ApplicationFiled: December 28, 2021Publication date: April 21, 2022Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Maki-Ontto, Lauri Juhani Salmia
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Patent number: 11209046Abstract: An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.Type: GrantFiled: January 21, 2020Date of Patent: December 28, 2021Assignee: INGERSOLL-RAND INDUSTRIAL U.S., INC.Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Mäki-Ontto, Lauri Juhani Salmia
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Patent number: 11108286Abstract: An electrical machine has passages in the coil ends of a stator. The passages have an inlet port and an exit port disposed at different locations. The passages remove heat from the electrical machine during operation. The passages formed in the coil ends can receive a cooling fluid discharged from cooling passages formed in a stator core. Tooling can be used to form the passages. In some embodiments passages are also formed in the rotor. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for electrical machines and the cooling of electrical machine rotors and/or stators.Type: GrantFiled: May 30, 2018Date of Patent: August 31, 2021Assignee: Trane International Inc.Inventor: Fredrik Boxberg
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Publication number: 20210094098Abstract: Systems and methods form induction rotors by performing isostatic pressing (HIP) to weld clad to a shaft, which allows for scaling the manufacturing of solid steel rotors, as compared to conventional techniques. In examples, the rotors are designed for high-speed motors and may include recessed short circuit rings and/or end rings. An exemplary process molds an alloy powder into cladding such that heretofore unachievable rotor designs are achievable according to systems and methods described herein. In examples, a thin source-layer is introduced to welding zones, thereby enriching and strengthening the resulting joint at welding zones. The source-layer may be introduced by adding an intermediate layer comprising the source material between the materials being welded. The reduced alloy-depletion welding disclosed herein strengthens the welding area joints and provides for the manufacture of component designs, which were previously unachievable due to alloy-depletion weaknesses and environmental constraints.Type: ApplicationFiled: September 26, 2019Publication date: April 1, 2021Applicant: Ingersoll-Rand CompanyInventors: Fredrik Boxberg, Juha T. Saari, Esa H. M. Vikman
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Patent number: 10742082Abstract: A fixation system that is structured to secure one or more permanent magnets to a rotor core. The fixation system may include one or more retention wedges that exert an interference or press fit against the permanent magnets to secure the permanent magnets to the rotor core. At least a portion of the retention wedges may be secured within axially extending channels in the rotor core. Additionally, the permanent magnets may be separated from each other by eddy current shields, which may also be retained in position by the retention wedges. The fixation system may also include a magnet pressure or fixation sleeve that exerts a radially inwardly directed force against the magnets and is free from direct contact with the retention wedges. According to certain embodiments, the magnet pressure or fixation sleeve may be shrink fitted onto at least a portion of the rotor core and/or the permanent magnets.Type: GrantFiled: December 18, 2015Date of Patent: August 11, 2020Assignee: Ingersoll-Rand Industrial U.S., Inc.Inventors: Petri J Maki-Ontto, Fredrik Boxberg, Esa H Vikman
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Publication number: 20200232506Abstract: An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.Type: ApplicationFiled: January 21, 2020Publication date: July 23, 2020Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Mäki-Ontto, Lauri Juhani Salmia
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Publication number: 20190372410Abstract: An electrical machine has passages in the coil ends of a stator. The passages have an inlet port and an exit port disposed at different locations. The passages remove heat from the electrical machine during operation. The passages formed in the coil ends can receive a cooling fluid discharged from cooling passages formed in a stator core. Tooling can be used to form the passages. In some embodiments passages are also formed in the rotor. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for electrical machines and the cooling of electrical machine rotors and/or stators.Type: ApplicationFiled: May 30, 2018Publication date: December 5, 2019Inventor: Fredrik Boxberg
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Publication number: 20160190883Abstract: A fixation system that is structured to secure one or more permanent magnets to a rotor core. The fixation system may include one or more retention wedges that exert an interference or press fit against the permanent magnets to secure the permanent magnets to the rotor core. At least a portion of the retention wedges may be secured within axially extending channels in the rotor core. Additionally, the permanent magnets may be separated from each other by eddy current shields, which may also be retained in position by the retention wedges. The fixation system may also include a magnet pressure or fixation sleeve that exerts a radially inwardly directed force against the magnets and is free from direct contact with the retention wedges. According to certain embodiments, the magnet pressure or fixation sleeve may be shrink fitted onto at least a portion of the rotor core and/or the permanent magnets.Type: ApplicationFiled: December 18, 2015Publication date: June 30, 2016Inventors: Petri J. Maki-Ontto, Fredrik Boxberg, Esa H. Vikman