Patents by Inventor Daquan Xie

Daquan Xie 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).

  • Ground fault detection method and system
    Patent number: 11555862
    Abstract: The present disclosure provides a method and system for ground fault detection. The method may include obtaining an input voltage and a null-ground voltage; determining whether the null-ground voltage is less than a voltage threshold; if yes, further determining whether the null-ground voltage is less than a preset voltage; if yes, determining that the grounding state is normal; if the null-ground voltage is greater than or equal to the preset voltage, determining that the grounding state is abnormal; if the null-ground voltage is greater than or equal to the voltage threshold, determining that the live wire and the null wire are reversed; in the case that the live wire and the null wire are reversed, determining whether the difference between the input voltage and the null-ground voltage is less than the preset voltage; if yes, determining that the grounding state is normal; if no, determining that the grounding state is abnormal.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: January 17, 2023
    Assignees: Wanbang Digital Energy Co., LTD., Wanbang Star Charge Technology LTD.
    Inventors: Hsien-Yi Tsai, Daquan Xie, Fei Du, Rupei Zhang
  • GROUND FAULT DETECTION METHOD AND SYSTEM
    Publication number: 20210096191
    Abstract: The present disclosure provides a method and system for ground fault detection. The method may include obtaining an input voltage and a null-ground voltage; determining whether the null-ground voltage is less than a voltage threshold; if yes, further determining whether the null-ground voltage is less than a preset voltage; if yes, determining that the grounding state is normal; if the null-ground voltage is greater than or equal to the preset voltage, determining that the grounding state is abnormal; if the null-ground voltage is greater than or equal to the voltage threshold, determining that the live wire and the null wire are reversed; in the case that the live wire and the null wire are reversed, determining whether the difference between the input voltage and the null-ground voltage is less than the preset voltage; if yes, determining that the grounding state is normal; if no, determining that the grounding state is abnormal.
    Type: Application
    Filed: September 29, 2020
    Publication date: April 1, 2021
    Applicants: Wanbang Digital Energy Co., LTD., Wanbang Star Charge Technology Ltd.
    Inventors: Hsien-Yi Tsai, Daquan Xie, Fei Du, Rupei Zhang