Patents by Inventor Tomas Fajt

Tomas Fajt 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).

  • ROTOR FOR ELECTRIC MOTORS
    Publication number: 20240030763
    Abstract: 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: Application
    Filed: August 7, 2023
    Publication date: January 25, 2024
    Inventors: Fredrik Boxberg, Charles J. Peterson, Yubo Nian, Petri J. Mäki-Ontto, Lauri Juhani Salmia, Russell T. Abbott, Tomas Fajt, Seth M. McGill
  • Rotor for electric motors
    Patent number: 11722025
    Abstract: 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: Grant
    Filed: December 31, 2020
    Date of Patent: August 8, 2023
    Assignee: 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
  • ROTOR FOR ELECTRIC MOTORS
    Publication number: 20220209598
    Abstract: 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: Application
    Filed: December 31, 2020
    Publication date: June 30, 2022
    Inventors: Fredrik Boxberg, Charles J. Peterson, Yubo Nian, Petri J. Mäki-Ontto, Lauri Juhani Salmia, Russell T. Abbott, Tomas Fajt, Seth M. McGill