Patents by Inventor Xiaojun Sheng

Xiaojun Sheng 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).

  • Protection device and protection method for through power network fault of double-fed induction generator
    Patent number: 8674665
    Abstract: The invention discloses a power grid fault ride-through device and a method for a doubly fed induction generator.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: March 18, 2014
    Assignee: Shenzhen Hopewind Electric Co. Ltd.
    Inventors: Xiaojun Sheng, Zhihua Wang, Quanbo Xia, Jianyou Zeng, Dansheng Zhou, Ronghui Liao
  • PROTECTION DEVICE AND PROTECTION METHOD FOR THROUGH POWER NETWORK FAULT OF DOUBLE-FED INDUCTION GENERATOR
    Publication number: 20110215772
    Abstract: The invention discloses a power grid fault ride-through device and a method for a doubly fed induction generator.
    Type: Application
    Filed: July 23, 2010
    Publication date: September 8, 2011
    Applicant: SHENZHEN HOPEWIND ELECTRIC CO. LTD.
    Inventors: Xiaojun Sheng, Zhihua Wang, Quanbo Xia, Jianyou Zeng, Dangsheng Zhou, Ronghui Liao
  • Method of switching synchronization of parallel-connected converter system
    Patent number: 6788559
    Abstract: The present invention relates to a switching synchronization method of parallel converter system, wherein one of converters is the host and the others are slave converters. The host converter includes a first timer and a pulse-transmitting device, and the slave converter includes a second timer, pulse capture device, and a synchronization adjustment. At a fixed time Tk1, the host converter sends a synchronization pulse to the synchronization bus through the pulse-transmitting device; and in the slave converter the second timer records the time Tx of the edge of the synchronization pulse received by the pulse capture device from the synchronization bus.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: September 7, 2004
    Assignee: Emerson Network Power Co., Ltd.
    Inventors: Xiaojun Sheng, Dangsheng Zhou
  • Method of switching synchronization of parallel-connected converter system
    Publication number: 20030137856
    Abstract: The present invention relates to a switching synchronization method of parallel converter system, wherein one of converters is the host and the others are slave converters. The host converter includes a first timer and a pulse-transmitting device, and the slave converter includes a second timer, pulse capture device, and a synchronization adjustment. At a fixed time Tk1, the host converter sends a synchronization pulse to the synchronization bus through the pulse-transmitting device; and in the slave converter the second timer records the time Tx of the edge of the synchronization pulse received by the pulse capture device from the synchronization bus.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 24, 2003
    Applicant: EMERSON NETWORK POWER CO., LTD.
    Inventors: Xiaojun Sheng, Dangsheng Zhou