Patents by Inventor Zhaowei Ma

Zhaowei 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).

  • Three-phase 48-pulse rectifier transformer
    Patent number: 9013905
    Abstract: A three-phase 48-pulse rectifier transformer includes two 24-pulse rectifier transformers phase-shifted through valve-side output windings. Each 24-pulse rectifier transformer has two sets of grid-side input windings and four sets of valve-side output windings. The two sets of grid-side input windings are connected in parallel and axially arranged in a split manner. Among the four sets of valve-side output windings, two sets of valve-side output windings are radially arranged in a split manner corresponding to one set of grid-side input windings, and the other two sets of valve-side output windings are also radially arranged in a split manner corresponding to the other set of grid-side input windings. The two sets of valve-side output windings that are radially split and the other two sets of valve-side output windings that are radially split are axially arranged in a split manner. The grid-side input windings of the two 24-pulse rectifier transformers are phase-shifted with respect to each other.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: April 21, 2015
    Assignee: Jiangsu Huapeng Transformer Co., Ltd.
    Inventors: Qinggan Zeng, Bin Cao, Zhaowei Ma, Yingping Wang
  • THREE-PHASE 48-PULSE RECTIFIER TRANSFORMER
    Publication number: 20140015629
    Abstract: A three-phase 48-pulse rectifier transformer consists of two 24-pulse rectifier transformers phase-shifted through valve-side output windings. Each 24-pulse rectifier transformer comprises two sets of grid-side input windings and four sets of valve-side output windings. The two sets of grid-side input windings are connected in parallel and axially arranged in a split manner. Among the four sets of valve-side output windings, two sets of valve-side output windings are radially arranged in a split manner corresponding to one set of grid-side input windings, and the other two sets of valve-side output windings are also radially arranged in a split manner corresponding to the other set of grid-side input windings. The two sets of valve-side output windings that are radially split and the other two sets of valve-side output windings that are radially split are axially arranged in a split manner. The grid-side input windings of the two 24-pulse rectifier transformers are phase-shifted with respect to each other.
    Type: Application
    Filed: January 19, 2012
    Publication date: January 16, 2014
    Inventors: Qinggan Zeng, Bin Cao, Zhaowei Ma, Yingping Wang