Patents by Inventor Zhenxue Xu

Zhenxue Xu 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).

  • Publication number: 20240371565
    Abstract: A wireless charging receiver that includes a first coil, a second coil, and a nanocrystalline sheet is disclosed. The first coil is configured to be located within a recess in the nanocrystalline sheet and is positioned between the second coil and the nanocrystalline sheet. The first coil includes first and second terminals and the second coil includes third and fourth terminals. The first terminal is connected to the third terminal and the second terminal is connected to the fourth terminal to electrically connect the first coil to the second coil. The first coil may be formed of a flexible printed circuit board having a continuous trace or may be formed of litz wire. The first coil may be a hybrid coil with a first portion formed of a flexible printed circuit board having a continuous trace and with a second portion formed of litz wire.
    Type: Application
    Filed: June 13, 2024
    Publication date: November 7, 2024
    Applicant: Google LLC
    Inventors: Li Wang, Liyu Yang, Stefano Saggini, Liang Jia, Yanchao Li, Zhenxue Xu, Haoquan Zhang, Mauricio Antonio Alvarado Ortega, Giulia Segatti, Pingsheng Wu, Srikanth Lakshmikanthan, Qi Tian, Veera Venkata Siva Nagesh Polu, Yung-Chih Chen, Yi Lin Chen, Wei Chen Tu
  • Publication number: 20200358314
    Abstract: A computing device can include a housing, a display secured by the housing, a charging coil included in a back side of the housing, the back side of the housing being on an opposite side from the display, and at least one magnet adjacent to the charging coil.
    Type: Application
    Filed: May 7, 2019
    Publication date: November 12, 2020
    Inventors: Vijayasekaran Boovaragavan, Veera Venkata Siva Nagesh Polu, Srikanth Lakshmikanthan, Douglas Osterhout, Liang Jia, Chao Fei, Zhenxue Xu
  • Patent number: 7782022
    Abstract: A system and method for determining if a USB port can source sufficient current to charge a rechargeable battery at a predetermined peak current level. Detection circuitry is disposed between the USB port and the battery. The detection circuitry includes a current source that is controlled to provide to the battery an increasing current that is sourced by the USB port. As the source current is increased from an initial value to a predetermined peak current source value, the output voltage of the USB port is monitored. If the USB port output voltage drops below a specified threshold voltage before the current source has ramped to the peak current source value, the load current is removed from the battery and an indication is provided that the USB port cannot provide the specified current. The detection process is then repeated after a specified delay interval.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: August 24, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Zhenxue Xu, Byron Reed
  • Patent number: 7492616
    Abstract: The present invention provides a modulation controller for use with a three phase converter. In one embodiment, the modulation controller includes a three phase modulator configured to provide vector control signals for the three phase converter that generate a common mode voltage. Additionally, the modulation controller also includes a transition modifier coupled to the three phase modulator and configured to provide a shaping function for the vector control signals that extends a transition period of the common mode voltage.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: February 17, 2009
    Assignee: Lineage Power Corporation
    Inventors: Minghua Fu, Zhenxue Xu, George Ulaner
  • Publication number: 20080122573
    Abstract: An apparatus for clamping voltage on a line at a desired voltage and configured for receiving a test voltage includes: (a) A varistor coupled with the line, manifesting characteristics of a capacitor with first signals exceeding a first frequency and manifesting Zener characteristics establishing a first breakdown voltage with second signals having a frequency less than a second frequency which is lower than the first frequency. (b) A spark gap establishing a second breakdown voltage equal with the desired voltage being coupled with the varistor and a low reference potential. (c) A passive direct current element coupled in parallel with the spark gap between the varistor and the low reference potential and effecting forward biasing of the varistor in the presence of the second signals. The second breakdown voltage is less than the test voltage. The sum of the first and second breakdown voltages is greater than the test voltage.
    Type: Application
    Filed: November 8, 2006
    Publication date: May 29, 2008
    Applicant: Tyco Electronics Power Systems, Inc., a Corporation of the State of Nevada
    Inventors: George Ulaner, Zhenxue Xu
  • Publication number: 20060215430
    Abstract: The present invention provides a modulation controller for use with a three phase converter. In one embodiment, the modulation controller includes a three phase modulator configured to provide vector control signals for the three phase converter that generate a common mode voltage. Additionally, the modulation controller also includes a transition modifier coupled to the three phase modulator and configured to provide a shaping function for the vector control signals that extends a transition period of the common mode voltage.
    Type: Application
    Filed: March 25, 2005
    Publication date: September 28, 2006
    Applicant: Tyco Electronics Power Systems, Inc.
    Inventors: Minghua Fu, Zhenxue Xu, George Ulaner
  • Patent number: 6952335
    Abstract: A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection requirements. The high-speed, solid-state DC circuit breaker uses an emitter turn-off (ETO) thyristor as the switch. The ETO thyristor has an anode, a cathode and first, second and third gate electrodes. The anode is connectable to a source of DC current, and the cathode is connectable to a load. A solid-state trip circuit is connected to the first, second and third gate electrodes for controlling interrpution of DC current to the load by turning off said ETO thyristor.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: October 4, 2005
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Qin Huang, Xigen Zhou, Zhenxue Xu
  • Publication number: 20030183838
    Abstract: A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection requirements. The high-speed, solid-state DC circuit breaker uses an emitter turn-off (ETO) thyristor as the switch. The ETO thyristor has an anode, a cathode and first, second and third gate electrodes. The anode is connectable to a source of DC current, and the cathode is connectable to a load. A solid-state trip circuit is connected to the first, second and third gate electrodes for controlling interrpution of DC current to the load by turning off said ETO thyristor.
    Type: Application
    Filed: March 19, 2003
    Publication date: October 2, 2003
    Inventors: Qin Huang, Xigen Zhou, Zhenxue Xu