Patents by Inventor Zhikai Ma

Zhikai Ma 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 for achieving converter transformer for DC magnetic bias
    Patent number: 9142349
    Abstract: A method for achieving converter transformer for suppressing DC bias magnet comprises increasing the seaming width of the transformer core lamination, which comprises in detail calculating the width and the height of each stage of lamination according to the reserved seaming width of the lamination, the sectional area of the core, the space between columns, and the height of the window, shearing the lamination based on the width and the height of the lamination obtained by calculating, overlapping two pieces of laminations into one piece of lamination according to the order of stages, placing them on the core frame alternately by stages, and after overlapping all the laminations, fastening each stage of lamination.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: September 22, 2015
    Assignee: TBEA SHENYANG TRANSFORMER GROUP CO., LTD.
    Inventors: Jian Wang, Guiping Li, Yong Sun, Zhikai Ma
  • Method for Achieving Converter Transformer for Suppressing DC Bias Magnet
    Publication number: 20120090164
    Abstract: A method for achieving converter transformer for suppressing DC bias magnet comprises increasing the seaming width of the transformer core lamination, which comprises in detail calculating the width and the height of each stage of lamination according to the reserved seaming width of the lamination, the sectional area of the core, the space between columns, and the height of the window, shearing the lamination based on the width and the height of the lamination obtained by calculating, overlapping two pieces of laminations into one piece of lamination according to the order of stages, placing them on the core frame alternately by stages, and after overlapping all the laminations, fastening each stage of lamination.
    Type: Application
    Filed: June 26, 2009
    Publication date: April 19, 2012
    Applicant: TBEA SHENYANG TRANSFORMER GROUP CO., LTD
    Inventors: Jian Wang, Guiping Li, Yong Sun, Zhikai Ma