Patents by Inventor Seppo Saarakkala

Seppo Saarakkala 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).

  • Patent number: 11043864
    Abstract: A method and apparatus for self-commissioning a bearingless-motor drive, which includes a bearingless motor and a control unit of the bearingless motor are disclosed. The motor includes at least one winding and at least one permanent magnet. The method includes generating a magnetic model, the magnetic model including a plurality of constant parameters; supplying, while the movable part remains standstill, to the at least one winding at least two unequal currents; measuring, with a magnetic sensor, flux linkages caused by said at least two unequal currents, respectively; calculating, with the magnetic model, flux linkages by inputting to the magnetic model current values equal to the currents supplied to the at least one winding; and fitting, with a least-squares fitting algorithm, at least one constant parameter in the magnetic model such that the difference between the measured and calculated flux linkages will be minimized.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: June 22, 2021
    Assignee: KONE CORPORATION
    Inventors: Seppo Saarakkala, Victor Mukherjee, Maksim Sokolov, Marko Hinkkanen, Anouar Belahcen
  • Publication number: 20200325003
    Abstract: The invention refers to an electric linear motor comprising a longitudinal stator beam; at least one mover adapted to move along the stator beam; which stator beam comprises at least two side faces located at opposite sides of the stator beam, each of the side faces carrying ferromagnetic poles spaced apart by a pitch, and which mover comprises at least two counter-faces facing the respective side faces of the stator beam, wherein the at least two side faces, as well as the at least two counter-faces facing the respective side faces, are inclined or offset with respect to each other.
    Type: Application
    Filed: June 30, 2020
    Publication date: October 15, 2020
    Applicant: Kone Corporation
    Inventors: Tuukka KORHONEN, Tero HAKALA, Pasi RAASSINA, Seppo SUUR-ASKOLA, Marko HINKKANEN, Seppo SAARAKKALA, Maksim SOKOLOV, Reza HOSSEINZADEH
  • Patent number: 10689227
    Abstract: The invention refers to an electric linear motor, control apparatus, transport system and a method. The electric linear motor comprises a longitudinal stator beam; at least one mover at least partially surrounding the stator beam and adapted to move along the stator beam; which stator beam comprises at least two side faces located at opposite sides of the stator beam, each of the side faces carrying ferromagnetic poles spaced apart by a pitch, and which mover comprises at least two counter-faces facing the respective side faces of the stator beam. The mover has in at least one of said counter-faces rotor units having at least one winding and at least one permanent magnet arranged to co-act with the ferromagnetic poles of the respective side faces of the stator beam.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: June 23, 2020
    Assignee: Kone Corporation
    Inventors: Tuukka Korhonen, Tero Hakala, Pasi Raassina, Seppo Suur-Askola, Marko Hinkkanen, Seppo Saarakkala, Maksim Sokolov, Reza Hosseinzadeh
  • Publication number: 20200076255
    Abstract: A method and apparatus for self-commissioning a bearingless-motor drive, which includes a bearingless motor and a control unit of the bearingless motor are disclosed. The motor includes at least one winding and at least one permanent magnet. The method includes generating a magnetic model, the magnetic model including a plurality of constant parameters; supplying, while the movable part remains standstill, to the at least one winding at least two unequal currents; measuring, with a magnetic sensor, flux linkages caused by said at least two unequal currents, respectively; calculating, with the magnetic model, flux linkages by inputting to the magnetic model current values equal to the currents supplied to the at least one winding; and fitting, with a least-squares fitting algorithm, at least one constant parameter in the magnetic model such that the difference between the measured and calculated flux linkages will be minimized.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Applicant: KONE Corporation
    Inventors: Seppo Saarakkala, Victor Mukherjee, Maksim Sokolov, Marko Hinkkanen, Anouar Belahcen
  • Publication number: 20190300329
    Abstract: The invention refers to an electric linear motor, control apparatus, transport system and a method. The electric linear motor comprises a longitudinal stator beam; at least one mover at least partially surrounding the stator beam and adapted to move along the stator beam; which stator beam comprises at least two side faces located at opposite sides of the stator beam, each of the side faces carrying ferromagnetic poles spaced apart by a pitch, and which mover comprises at least two counter-faces facing the respective side faces of the stator beam. The mover has in at least one of said counter-faces rotor units having at least one winding and at least one permanent magnet arranged to co-act with the ferromagnetic poles of the respective side faces of the stator beam.
    Type: Application
    Filed: February 12, 2019
    Publication date: October 3, 2019
    Applicant: Kone Corporation
    Inventors: Tuukka Korhonen, Tero Hakala, Pasi Raassina, Seppo Suur-Askola, Marko Hinkkanen, Seppo Saarakkala, Maksim Sokolov, Reza Hosseinzadeh