Patents by Inventor Yuncai LU

Yuncai LU 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).

  • Device for evaluating and demagnetizing residual magnetism quantity of power transformer and control method thereof
    Patent number: 11574759
    Abstract: The present invention discloses a device for evaluating and demagnetizing residual magnetism quantity of a power transformer. A main circuit comprises a switching power supply the two ends of which are respectively connected with a filter capacitor and a resistor in parallel. A forward end of the switching power supply is connected with a main switch in series. A rear end of the main switch is connected with a series branch of a sixth switch and a first resistor, a series branch of a first switch and a second switch, and a series branch of a third switch and a fourth switch are connected in parallel. A driving circuit is respectively connected with driving ends of the main switch, the sixth, first, second, third and fourth switches. A control circuit is connected with the driving circuit for sending an instruction to the driving circuit.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: February 7, 2023
    Assignees: State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Jiangsu Electric Power Research Institute Corporation Limited, State Grid Jiangsu Electric Power Co., Ltd., Nanjing DNN Technology Co., LTD
    Inventors: Fengbo Tao, Jiansheng Li, Chao Wei, Yang Liu, Xu Wei, Yuncai Lu, Shu Chen, Hairong Wei, Yiming Wu, Xiaoping Yang, Jieqing Deng, Peng Wu, Tianxi Xie, Shengquan Wang, Caibo Liao, Ruibin Li
  • DEVICE FOR EVALUATING AND DEMAGNETIZING RESIDUAL MAGNETISM QUANTITY OF POWER TRANSFORMER AND CONTROL METHOD THEREOF
    Publication number: 20200126706
    Abstract: The present invention discloses a device for evaluating and demagnetizing residual magnetism quantity of a power transformer. A main circuit comprises a switching power supply the two ends of which are respectively connected with a filter capacitor and a resistor in parallel. A forward end of the switching power supply is connected with a main switch in series. A rear end of the main switch is connected with a series branch of a sixth switch and a first resistor, a series branch of a first switch and a second switch, and a series branch of a third switch and a fourth switch are connected in parallel. A driving circuit is respectively connected with driving ends of the main switch, the sixth, first, second, third and fourth switches. A control circuit is connected with the driving circuit for sending an instruction to the driving circuit.
    Type: Application
    Filed: July 31, 2019
    Publication date: April 23, 2020
    Applicants: State Grid Jiangsu Electric Power Co.,Ltd. Research Institute, Jiangsu Electric Power Research Institute Corporation Limited, State Grid Jiangsu Electric Power Co.,Ltd., Nanjing DNN Technology Co.,LTD
    Inventors: Fengbo TAO, Jiansheng LI, Chao WEI, Yang LIU, Xu WEI, Yuncai LU, Shu CHEN, Hairong WEI, Yiming WU, Xiaoping YANG, Jieqing DENG, Peng WU, Tianxi XIE, Shengquan WANG, Caibo LIAO, Ruibin LI