Patents by Inventor Qionglin Zheng

Qionglin Zheng 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).

  • Negative voltage backflow direct current supply system for rail transport
    Patent number: 10744880
    Abstract: A negative voltage backflow direct current supply system for a rail transport is provided. The system adds a negative voltage return line and a DC converter for realizing negative voltage backflow current based on traditional DC power supply system. The negative voltage backflow line replaces the backflow line of running rail in the traditional DC power supply system, which can greatly reduce or eliminate the stray current in the traditional DC power supply system and the negative influence of too high ground potential of running rail. At the same time, the DC converter can be used as regenerative braking energy storage device of train to improve the regenerative braking energy utilization efficiency of DC power supply system and maintain the voltage stability of DC power supply system of rail transport.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: August 18, 2020
    Assignees: Beijing Efficiengine Technology LLC, Beijing Jiaotong University
    Inventors: Qionglin Zheng, Xiaofeng Yang, Xiaojie You, Ruixiang Hao, Hong Li
  • NEGATIVE VOLTAGE BACKFLOW DIRECT CURRENT SUPPLY SYSTEM FOR RAIL TRANSPORT
    Publication number: 20180208063
    Abstract: A negative voltage backflow direct current supply system for a rail transport is provided. The system adds a negative voltage return line and a DC converter for realizing negative voltage backflow current based on traditional DC power supply system. The negative voltage backflow line replaces the backflow line of running rail in the traditional DC power supply system, which can greatly reduce or eliminate the stray current in the traditional DC power supply system and the negative influence of too high ground potential of running rail. At the same time, the DC converter can be used as regenerative braking energy storage device of train to improve the regenerative braking energy utilization efficiency of DC power supply system and maintain the voltage stability of DC power supply system of rail transport.
    Type: Application
    Filed: June 22, 2016
    Publication date: July 26, 2018
    Applicants: Beijing Efficiengine Technology LLC
    Inventors: Qionglin Zheng, Xiaofeng Yang, Xiaojie You, Ruixiang Hao, Hong Li