Patents by Inventor Thieu X Nguyen

Thieu X Nguyen 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).

  • AC generator having stator assembly with improved phase coil insertion order to reduce noise
    Patent number: 6563247
    Abstract: An electrical generator has a rotor and a stator core wound with two three-phase delta-connected stator windings. In a 12 rotor pole, 72 tooth/slot stator core, the first, second and third phase coils corresponding to the first stator winding are wound such that respective starting leads of the coils are progressively offset by two slots. The fourth, fifth and sixth phase coils of the second stator winding are also wound, with respect to each other, such that their starting leads are progressively offset by two slots. The starting lead of the first to be inserted phase coil of the second stator winding is offset 65 degrees mechanical from the starting lead of the last to be inserted phase coil of the first stator winding. Airflow noise is reduced, particularly in the 18th order harmonic.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: May 13, 2003
    Assignee: Delphi Technologies, Inc.
    Inventor: Thieu X Nguyen
  • AC generator having stator assembly with improved phase coil insertion order to reduce noise
    Publication number: 20020171310
    Abstract: An electrical generator has a rotor and a stator core wound with two three-phase delta-connected stator windings. In a 12 rotor pole, 72 tooth/slot stator core, the first, second and third phase coils corresponding to the first stator winding are wound such that respective starting leads of the coils are progressively offset by two slots. The fourth, fifth and sixth phase coils of the second stator winding are also wound, with respect to each other, such that their starting leads are progressively offset by two slots. The starting lead of the first to be inserted phase coil of the second stator winding is offset 65 degrees mechanical from the starting lead of the last to be inserted phase coil of the first stator winding. Airflow noise is reduced, particularly in the 18th order harmonic.
    Type: Application
    Filed: May 18, 2001
    Publication date: November 21, 2002
    Inventor: Thieu X. Nguyen