Patents by Inventor Xiping Zhao

Xiping Zhao 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).

  • Detector of transformer interturn short circuit using voltage differential
    Patent number: 8531188
    Abstract: An improved internturn short circuit detection device of transformer via differential voltage comprises a single-phase transformer (TM). The single-phase transformer (TM) comprises a high-voltage coil (K) and a low-voltage coil (N). A voltage transformer (PT) is positioned at the high voltage side of the single-phase transformer (TM). Two branches of a tap (K1) of the high-voltage coil (K) are connected with the input of a first converter (Q?), and a first voltage (U1?) is obtained. The secondary side of the voltage transformer (PT) is connected with the input of a second converter (Q), and a second voltage (U1) is obtained, and the first voltage (U1?) and the second voltage (U1) are compared, and when the voltage difference is above a predetermined primary threshold value, an interturn short circuit failure of the primary side is determined.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: September 10, 2013
    Assignee: Zhejiang Guangtian Transformer Co., Ltd.
    Inventor: Xiping Zhao
  • DETECTOR OF TRANSFORMER INTERTURN SHORT CIRCUIT USING VOLTAGE DIFFERENTIAL
    Publication number: 20110267072
    Abstract: An improved internturn short circuit detection device of transformer via differential voltage comprises a single-phase transformer (TM). The single-phase transformer (TM) comprises a high-voltage coil (K) and a low-voltage coil (N). A voltage transformer (PT) is positioned at the high voltage side of the single-phase transformer (TM). Two branches of a tap (K1) of the high-voltage coil (K) are connected with the input of a first converter (Q?), and a first voltage (U1?) is obtained. The secondary side of the voltage transformer (PT) is connected with the input of a second converter (Q), and a second voltage (U1) is obtained, and the first voltage (U1?) and the second voltage (U1) are compared, and when the voltage difference is above a predetermined primary threshold value, an interturn short circuit failure of the primary side is determined.
    Type: Application
    Filed: December 23, 2009
    Publication date: November 3, 2011
    Inventor: Xiping Zhao
  • Wireless charger
    Patent number: D1023916
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: April 23, 2024
    Assignee: Shenzhen AI Infinite Electronics Co., Ltd.
    Inventors: Lifeng Luo, Xiping Zhao