Patents by Inventor Yewen Zhang

Yewen Zhang 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: 20240204568
    Abstract: The present invention relates to a high-order parity-time (PT) symmetry wireless power transfer (WPT) system and method. The method includes the following steps: providing an N-order composite coil which includes N resonance circuits, where N is an odd number; providing an M-order composite coil which includes M resonance circuits, where M is an even number; connecting a scattering capacitor to end portions of two adjacent resonance circuits; coupling the first resonance circuits in the two composite coils to realize WPT; connecting a load to an alternating current power supply; and adjusting a capacitor in the resonance circuit symmetrical to the two first resonance circuits according to a change in coupling strength caused by a change in coupling distance in a WPT process to obtain an optimal transfer efficiency.
    Type: Application
    Filed: April 12, 2021
    Publication date: June 20, 2024
    Inventors: Chao Zeng, Yong Sun, Guo Li, Zhiwei Guo, Kejia Zhu, Jun Jiang, Yunhui Li, Kai Fang, Yewen Zhang, Haitao Jiang, Hong Chen
  • Patent number: 11698402
    Abstract: An active probe and a method for measuring space charge distribution of polymer are provided. The active probe includes a case, electric pulse transmission unit, piezoelectric ceramic sheet, quartz glass block and signal-extracting aluminum block. An outer surface of the quartz glass block is adhered with a conductive material in contact with the case. An anode of the piezoelectric ceramic sheet is connected to the electric pulse transmission unit, and a cathode of the piezoelectric ceramic sheet is connected to the conductive material on the outer surface of the quartz glass block. The signal-extracting aluminum block is respectively connected with the quartz glass block and the measured signal extraction unit.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: July 11, 2023
    Assignee: TONGJI UNIVERSITY
    Inventors: Yewen Zhang, Zebin Cao, Jingxian Xu, Feihu Zheng
  • Publication number: 20220317171
    Abstract: An active probe and a method for measuring space charge distribution of polymer are provided. The active probe includes a case, electric pulse transmission unit, piezoelectric ceramic sheet, quartz glass block and signal-extracting aluminum block. An outer surface of the quartz glass block is adhered with a conductive material in contact with the case. An anode of the piezoelectric ceramic sheet is connected to the electric pulse transmission unit, and a cathode of the piezoelectric ceramic sheet is connected to the conductive material on the outer surface of the quartz glass block. The signal-extracting aluminum block is respectively connected with the quartz glass block and the measured signal extraction unit.
    Type: Application
    Filed: October 16, 2020
    Publication date: October 6, 2022
    Applicant: TONGJI UNIVERSITY
    Inventors: Yewen ZHANG, Zebin CAO, Jingxian XU, Feihu ZHENG
  • Publication number: 20210249914
    Abstract: A wireless power transfer system has a signal source, an exciting coil, a pair of resonance coils having the same resonance frequency, a receiving coil and a load. The resonance frequency is regulated by the pair of resonance coils. The working frequency is made close to the resonance frequency of the resonance coils by means of the physical properties of a single-mode point in a non-Hermitian system, so as to regulate the energy transfer rate by controlling the distance between the receiving coil and the adjacent resonance coil. The system is located at the single-mode point while the coupling distance between the pair of resonance coils is changed and efficient wireless power transfer and mono-frequency efficient wireless power transfer within the kHz frequency range are realized by means of the physical properties of fixed frequency and minimum loss at the single-mode point.
    Type: Application
    Filed: January 18, 2018
    Publication date: August 12, 2021
    Inventors: Yunhui Li, Kejia Zhu, Chao Zeng, Jun Jiang, Yong Sun, Kai Fang, Yuguang Chen, Yewen Zhang, Hong Chen