Patents by Inventor Juha T. Saari

Juha T. Saari 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: 11592060
    Abstract: 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: Grant
    Filed: December 28, 2021
    Date of Patent: February 28, 2023
    Assignee: Ingersoll-Rand Industrial U.S., Inc.
    Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Maki-Ontto, Lauri Juhani Salmia
  • Publication number: 20220120317
    Abstract: 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: Application
    Filed: December 28, 2021
    Publication date: April 21, 2022
    Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Maki-Ontto, Lauri Juhani Salmia
  • Patent number: 11209046
    Abstract: 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: Grant
    Filed: January 21, 2020
    Date of Patent: December 28, 2021
    Assignee: INGERSOLL-RAND INDUSTRIAL U.S., INC.
    Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Mäki-Ontto, Lauri Juhani Salmia
  • Publication number: 20210094098
    Abstract: 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: Application
    Filed: September 26, 2019
    Publication date: April 1, 2021
    Applicant: Ingersoll-Rand Company
    Inventors: Fredrik Boxberg, Juha T. Saari, Esa H. M. Vikman
  • Publication number: 20200232506
    Abstract: 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: Application
    Filed: January 21, 2020
    Publication date: July 23, 2020
    Inventors: Esa Heikki Matias Vikman, Fredrik Boxberg, Juha T. Saari, Petri J. Mäki-Ontto, Lauri Juhani Salmia
  • Publication number: 20200072278
    Abstract: Unique systems, methods, techniques and apparatuses of active magnetic bearing control systems are disclosed. One exemplary embodiment is a power converter electrically coupled to an active magnetic bearing (AMB) having a plurality of windings, the power converter comprising a DC bus, two capacitors, a first leg, a second leg, and a controller. The capacitors are electrically coupled in series between the positive rail and negative rail, one capacitor being electrically coupled to the other capacitor at a midpoint connection. The first leg comprises a first semiconductor switching device and a first output node. The second leg comprises a second semiconductor switching device and a second output node. The first output node is electrically coupled to the midpoint connection by way of a first AMB winding and the second output node is electrically coupled to the midpoint connection by way of a second AMB winding.
    Type: Application
    Filed: November 7, 2019
    Publication date: March 5, 2020
    Inventors: Lauri Juhani Salmia, Juha T. Saari, Petri J. Maki-Ontto, Risto Komulainen