Patents by Inventor Bumsuk Won

Bumsuk Won 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).

  • Method and apparatus for movable element position detection in an electrically commutated machine
    Patent number: 7429841
    Abstract: A method and circuit for detecting the position of the movable element of an electrically commutated machine. The method and apparatus allow detection of the back electromagnetic force (BEMF) waveform with all legs of the machine energized by mathematically removing the applied voltage from the measured voltage across the phases.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: September 30, 2008
    Assignee: The Berquist Torrington Company
    Inventors: Haroon I. Yunus, Russel H. Marvin, Bumsuk Won
  • Method for making rotor for permanent magnet electric machine
    Patent number: 7350283
    Abstract: A method for making a rotor for a permanent magnet electric motor comprising the steps of providing an annular permanent magnet and an annular back-up member. Affixing the magnet to the inner surface of the back-up member in an un-magnetized condition and overmolding both in an injection molding process while controlling the flow of the molten plastic so as to cause the plastic to engage the opposite sides of the magnet at substantially the same time resulting in a knit line intermediate the magnet sides on the inner surface of the magnet. Magnetizing the magnet.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: April 1, 2008
    Assignee: The Bergquist Torrington Company
    Inventors: Bumsuk Won, Russel H. Marvin, Gary Peresada
  • Permanent magnet motor
    Publication number: 20080018192
    Abstract: A permanent magnet motor having a stator back iron in the form of a “slinky” and a plurality of winding sections in circumaxially spaced relationship about the back iron. Each winding section comprises a conductor wound helically about the back iron with each coil adjacent the next and ending in a radial plan. A permanent magnet motor surrounds the stator.
    Type: Application
    Filed: March 15, 2006
    Publication date: January 24, 2008
    Inventors: Drew Rocky, John O'Connor, Russel Marvin, Edwin Chadwick, Phillip Thibodeau, Bumsuk Won
  • Method and apparatus for movable element position detection in an electrically commutated machine
    Publication number: 20070126386
    Abstract: A method and circuit for detecting the position of the movable element of an electrically commutated machine. The method and apparatus allow detection of the back electromagnetic force (BEMF) waveform with all legs of the machine energized by mathematically removing the applied voltage from the measured voltage across the phases.
    Type: Application
    Filed: September 30, 2004
    Publication date: June 7, 2007
    Inventors: Haroon Yunus, Russel Marvin, Bumsuk Won
  • Permanent magnet motor
    Publication number: 20050073210
    Abstract: A permanent magnet motor having a stator back iron in the form of a “slinky” and a plurality of winding sections in circumaxially spaced relationship about the back rion. Each winding section comprises a conductor wound helically about the back iron with each coil adjacent the next and ending in a radial plane. A permanent magnet motor surrounds the stator.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 7, 2005
    Inventors: Drew Rocky, John O'Connor, Russel Marvin, Edwin Chadwick, Phillip Thibodeau, Bumsuk Won
  • Method for making rotor for permanent magnet electric machine
    Publication number: 20050071985
    Abstract: A method for making a rotor for a permanent magnet electric motor comprising the steps of providing an annular permanent magnet and an annular back-up member. Affixing the magnet to the inner surface of the back-up member in an un-magnetized condition and overmolding both in an injection molding process while controlling the flow of the molten plastic so as to cause the plastic to engage the opposite sides of the magnet at substantially the same time resulting in a knit line intermediate the magnet sides on the inner surface of the magnet. Magnetizing the magnet.
    Type: Application
    Filed: May 26, 2004
    Publication date: April 7, 2005
    Inventors: Bumsuk Won, Russel Marvin, Gary Peresada