Patents by Inventor Weixing Feng

Weixing Feng 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).

  • DC voltage balance control for three-level NPC power converters with even-order harmonic elimination scheme
    Patent number: 7495938
    Abstract: Three-level inverter and rectifier power conversion systems and space vector modulation (SVM) controls having even-order harmonic elimination for neutral voltage balancing with a predefined vector switching sequences for half-wave symmetry in open loop system operation. The vector sequence listings for each SVM diagram segment includes switching state entries individually indicating one of three possible switching state levels positive (P), zero (0), or negative (N) for each of three or more switching groups of the power conversion system, with listings for each pair of first and second diametrically opposite diagram segments include symmetrically opposite switching states, with positive levels in the entries of the listing for the first segment corresponding to negative levels in the entries of the listing for the second segment and vice versa.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: February 24, 2009
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Bin Wu, Steven C. Rizzo, Navid R. Zargari, Congwei Liu, Weixing Feng
  • DC voltage balance control for three-level NPC power converters with even-order harmonic elimination scheme
    Publication number: 20060245216
    Abstract: Three-level inverter and rectifier power conversion systems and space vector modulation (SVM) controls having even-order harmonic elimination for neutral voltage balancing with a predefined vector switching sequences for half-wave symmetry in open loop system operation. The vector sequence listings for each SVM diagram segment includes switching state entries individually indicating one of three possible switching state levels positive (P), zero (0), or negative (N) for each of three or more switching groups of the power conversion system, with listings for each pair of first and second diametrically opposite diagram segments include symmetrically opposite switching states, with positive levels in the entries of the listing for the first segment corresponding to negative levels in the entries of the listing for the second segment and vice versa.
    Type: Application
    Filed: February 14, 2006
    Publication date: November 2, 2006
    Inventors: Bin Wu, Steven Rizzo, Navid Zagari, Congwei Liu, Weixing Feng