Patents by Inventor Petri J. Mäki-Ontto
Petri J. Mäki-Ontto 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: 20240088810Abstract: The technologies described and recited herein pertain to a permanent magnet motor having multiple voltage taps so that the motor may run in multiple configurations, e.g., a low-range and a high-range, and have multiple optimal operating points.Type: ApplicationFiled: April 22, 2022Publication date: March 14, 2024Inventors: Benjamin J. Sykora, Petri J. Mäki-Ontto, James W. Ziemer, Matthew A. Shepeck
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Publication number: 20240068518Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.Type: ApplicationFiled: November 8, 2023Publication date: February 29, 2024Inventors: Lauri Juhani Salmia, Petri J. Mäki-Ontto, Esa H.M. Vikman
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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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Patent number: 11859667Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.Type: GrantFiled: August 2, 2022Date of Patent: January 2, 2024Assignee: Ingersoll-Rand Industrial U.S., Inc.Inventors: Lauri Juhani Salmia, Petri J. Mäki-Ontto, Esa H. M. Vikman
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Patent number: 11770087Abstract: The technologies described and recited herein pertain to a permanent magnet motor having multiple voltage taps so that the motor may run in multiple configurations, e.g., a low-range and a high-range, and have multiple optimal operating points.Type: GrantFiled: April 23, 2021Date of Patent: September 26, 2023Assignee: TRANE INTERNATIONAL INC.Inventors: Benjamin J. Sykora, Petri J. Mäki-Ontto, James W. Ziemer, Matthew A. Shepeck
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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: 20230055707Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.Type: ApplicationFiled: August 2, 2022Publication date: February 23, 2023Inventors: Lauri Juhani Salmia, Petri J. Mäki-Ontto, Esa H.M. Vikman
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Patent number: 11549717Abstract: A method for adjusting compression efficiency for an HVACR system having a variable-frequency drive (VFD) is disclosed. The method includes determining a first compression efficiency, determining an operating point, determining a region of an operating map when a difference between the operating point and a previously determined operating point exceeds a predetermined threshold, adjusting a VFD input to a first input based on the region of the operating map, and controlling the VFD using the first input for a predetermined period of time. The method also includes determining a second compression efficiency and an operation restriction, adjusting the VFD input to a second input based on the operation restriction and a difference between the first compression efficiency and the second compression efficiency, and controlling the VFD using the second input. The method also includes utilizing machine learning control techniques to control several system variables to optimize the compression efficiency.Type: GrantFiled: March 31, 2021Date of Patent: January 10, 2023Assignee: TRANE INTERNATIONAL INC.Inventors: Seth M. McGill, Charles J. Peterson, Lauri Juhani Salmia, Petri J. Mäki-Ontto
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Publication number: 20220345062Abstract: The technologies described and recited herein pertain to a permanent magnet motor having multiple voltage taps so that the motor may run in multiple configurations, e.g., a low-range and a high-range, and have multiple optimal operating points.Type: ApplicationFiled: April 23, 2021Publication date: October 27, 2022Inventors: Benjamin J. Sykora, Petri J. Mäki-Ontto, James W. Ziemer, Matthew A. Shepeck
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Publication number: 20220316747Abstract: A method for adjusting compression efficiency for an HVACR system having a variable-frequency drive (VFD) is disclosed. The method includes determining a first compression efficiency, determining an operating point, determining a region of an operating map when a difference between the operating point and a previously determined operating point exceeds a predetermined threshold, adjusting a VFD input to a first input based on the region of the operating map, and controlling the VFD using the first input for a predetermined period of time. The method also includes determining a second compression efficiency and an operation restriction, adjusting the VFD input to a second input based on the operation restriction and a difference between the first compression efficiency and the second compression efficiency, and controlling the VFD using the second input. The method also includes utilizing machine learning control techniques to control several system variables to optimize the compression efficiency.Type: ApplicationFiled: March 31, 2021Publication date: October 6, 2022Inventors: Seth M. McGill, Charles J. Peterson, Lauri Juhani Salmia, Petri J. Mäki-Ontto
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Patent number: 11401971Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.Type: GrantFiled: August 26, 2019Date of Patent: August 2, 2022Assignee: Ingersoll-Rand Industrial U.S., Inc.Inventors: Lauri Juhani Salmia, Petri J Mäki-Ontto, Esa H. M. Vikman
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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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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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Publication number: 20210328481Abstract: Architectures or techniques are presented that can improve operation of permanent magnet (PM) motors, which can be part of a compressor or other heating, ventilation, and air conditioning (HVAC) device. Such improvements can be achieved by integration of inductive filtering into the motor assembly. A higher overall inductance can reduce current ripple and can further result in a lower total harmonic distortion, reduced power loss, and reduced heat generated. For example a first architecture can include a ferromagnetic core element in the PM motor that can cause a non-torque-producing reluctance path to the shaft. A second architecture can integrate a signal filter, which is customarily external, into a housing of the PM motor. Such can significant reduce costs and provide other advantages. A third architecture can couple an inductor (e.g., of the signal filter) to the shaft. Rotation of the shaft can thus serve to provide additional cooling for the inductor.Type: ApplicationFiled: April 20, 2020Publication date: October 21, 2021Applicant: Trane International Inc.Inventors: Benjamin J. Sykora, Seth M. McGill, Petri J. Mäki-Ontto
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Publication number: 20210062864Abstract: A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.Type: ApplicationFiled: August 26, 2019Publication date: March 4, 2021Applicant: Ingersoll-Rand CompanyInventors: Lauri Juhani Salmia, Petri J. Mäki-Ontto, Esa H.M. 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