Patents by Inventor Dahai ZHANG

Dahai 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: 20250109495
    Abstract: A furnace tube for thin film deposition, includes: a process tube; a wafer boat, arranged inside the process tube and provided with multi-layered supporting members along the length direction of the process tube; a gas supply tube, arranged inside the process tube and provided with multi-layered gas supply holes along the length direction of the process tube. Multi-layered exhaust holes are arranged on the sidewall of the process tube along the length direction, wherein the distribution area of the gas supply holes is gradually reduced from top to bottom along the length direction of the sidewall of the process tube, and the distribution area of the exhaust holes is gradually reduced from top to bottom along the length direction of the sidewall of the process tube.
    Type: Application
    Filed: November 24, 2022
    Publication date: April 3, 2025
    Applicants: ACM RESEARCH (SHANGHAI), INC., ACM Research (Lingang), Inc., ACM Research Korea CO., LTD., CleanChip Technologies Limited
    Inventors: Hui Wang, Shan Zhang, Dongcheng Zhou, Hui Shen, Ce Lv, Daniel Park, John Kim, Dahai Zhang, Xiaoyan Zhang, Jun Wang, Shena Jia, Jian Wang
  • Patent number: 12126280
    Abstract: Disclosed in the present invention is a dual-rotor microfluidic energy capturing and power generating device based on a piezoelectric effect. An inner ring of blades and an outer ring of blades are coaxially and movably sleeved, and rotate relatively. Sheet-like magnetic piezoelectric components and steel magnets are provided in an annular gap between the inner ring of blades and the outer ring of blades. Magnetic piezoelectric components are connected to an inner peripheral surface of the outer ring of blades, the magnetic piezoelectric components are magnetically repulsive to the steel magnets, and the outer sides of the magnetic piezoelectric components are axially arranged. The inner ring of blades and the outer ring of blades rotate relatively to drive the magnetic piezoelectric components and the steel magnets to rotate relatively, and further drive the magnetic piezoelectric components to oscillate to generate mechanical energy which is then converted into electric energy.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: October 22, 2024
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Peng Qian, Bo Feng, Dahai Zhang, Yulin Si, Xiaodong Liu
  • Patent number: 12062907
    Abstract: The present disclosure relates to a method for protecting DC line impedance phase based on protection and control coordination, and an application scenario of the method for protecting is a three-terminal flexible DC transmission network. The method uses high controllability of a converter after a fault, injects a characteristic signal at a characteristic frequency, and calculates a phase angle of input impedance to determine a fault interval, which effectively improves protection performance, turns passive to active, and is not affected by nonlinearity of the converter. At the same time, compared with a full-bridge MMC, using a half-bridge MMC does not need to perform fault ride-through first when identifying a fault, and does not need to add additional equipment, it creates fault features and can reliably identify an fault interval; improves protection quickness and at the same time also has better economic benefits.
    Type: Grant
    Filed: July 1, 2022
    Date of Patent: August 13, 2024
    Assignee: Beijing Jiaotong University
    Inventors: Meng Li, Jinghan He, Keao Chen, Dahai Zhang, Pinghao Ni, Yin Xu, Xiaojun Wang, Guomin Luo, Xiangyu Wu, Fang Zhang
  • Publication number: 20240178767
    Abstract: Disclosed in the present invention is a dual-rotor microfluidic energy capturing and power generating device based on a piezoelectric effect. An inner ring of blades and an outer ring of blades are coaxially and movably sleeved, and rotate relatively. Sheet-like magnetic piezoelectric components and steel magnets are provided in an annular gap between the inner ring of blades and the outer ring of blades. Magnetic piezoelectric components are connected to an inner peripheral surface of the outer ring of blades, the magnetic piezoelectric components are magnetically repulsive to the steel magnets, and the outer sides of the magnetic piezoelectric components are axially arranged. The inner ring of blades and the outer ring of blades rotate relatively to drive the magnetic piezoelectric components and the steel magnets to rotate relatively, and further drive the magnetic piezoelectric components to oscillate to generate mechanical energy which is then converted into electric energy.
    Type: Application
    Filed: October 18, 2021
    Publication date: May 30, 2024
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Peng QIAN, Bo FENG, Dahai ZHANG, Yulin SI, Xiaodong LIU
  • Patent number: 11789047
    Abstract: A method for calculating the steady-state fault current of a modular multilevel converter (MMC) comprises calculating the dc-side critical resistance values RA/B, RB/C and RC/D of the MMC based on the bridge arm inductance coefficient k and the ac-side reactance Xac of the MMC; Then, determining the operating modes of the MMC based on RA/B, RB/C and RC/D, and calculating the steady-state dc fault current and the conduction overlap angle respectively under various operating modes without considering the ac-side resistance based on the parameters k, Us, Rdc and the dc-side critical resistance values RA/B, RB/C and RC/D; After that the steady-state AC fault current amplitude and phase angle for each operating mode without considering the AC side resistance are calculated based on the DC current and conduction overlap angle for each operating mode, respectively. Finally, the steady-state AC fault current amplitude and phase angle are calculated for various operating modes considering the AC side resistance.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: October 17, 2023
    Assignee: BEIJING JIAOTONG UNIVERSITY
    Inventors: Jinghan He, Meng Li, Yiping Luo, Xiaojun Wang, Yin Xu, Dahai Zhang, Guomin Luo, Fang Zhang, Xiangyu Wu, Pinghao Ni, Ying Wang
  • Publication number: 20230231377
    Abstract: The present disclosure relates to a method for protecting DC line impedance phase based on protection and control coordination, and an application scenario of the method for protecting is a three-terminal flexible DC transmission network. The method uses high controllability of a converter after a fault, injects a characteristic signal at a characteristic frequency, and calculates a phase angle of input impedance to determine a fault interval, which effectively improves protection performance, turns passive to active, and is not affected by nonlinearity of the converter. At the same time, compared with a full-bridge MMC, using a half-bridge MMC does not need to perform fault ride-through first when identifying a fault, and does not need to add additional equipment, it creates fault features and can reliably identify an fault interval; improves protection quickness and at the same time also has better economic benefits.
    Type: Application
    Filed: July 1, 2022
    Publication date: July 20, 2023
    Applicant: Beijing Jiaotong University
    Inventors: Meng LI, Jinghan HE, Keao CHEN, Dahai ZHANG, Pinghao NI, Yin XU, Xiaojun WANG, Guomin LUO, Xiangyu WU, Fang ZHANG
  • Publication number: 20230124831
    Abstract: A method for calculating the steady-state fault current of a modular multilevel converter (MMC) comprises calculating the dc-side critical resistance values RA/B, RB/C and RC/D of the MMC based on the bridge arm inductance coefficient k and the ac-side reactance Xac of the MMC; Then, determining the operating modes of the MMC based on RA/B, RB/C and RC/D, and calculating the steady-state dc fault current and the conduction overlap angle respectively under various operating modes without considering the ac-side resistance based on the parameters k, Us, Rdc and the dc-side critical resistance values RA/B, RB/C and RC/D; After that the steady-state AC fault current amplitude and phase angle for each operating mode without considering the AC side resistance are calculated based on the DC current and conduction overlap angle for each operating mode, respectively. Finally, the steady-state AC fault current amplitude and phase angle are calculated for various operating modes considering the AC side resistance.
    Type: Application
    Filed: October 20, 2020
    Publication date: April 20, 2023
    Inventors: Jinghan HE, Meng LI, Yiping LUO, Xiaojun WANG, Yin XU, Dahai ZHANG, Guomin LUO, Fang ZHANG, Xiangyu WU, Pinghao NI, Ying WANG
  • Publication number: 20230021012
    Abstract: Embodiments of the present disclosure provide an opening and closing mechanism and a leakage protection device. The opening and closing mechanism comprises: a stationary contact and a movable contact, which contacts the stationary contact at ON-position and separates from the stationary contact at OFF-position; a first magnetic assembly; and a second magnetic assembly that is integrally rotatable about an axis, the second magnetic assembly comprising: an electric conductor onto which the movable contact is mounted; and a magnetic body comprising at least one magnetic portion configured to rotate about the axis under a magnetic force from the first magnetic assembly, to correspondingly drive the movable contact to rotate between the ON-position and the OFF-position, wherein a distance from each of the at least one magnetic portion to the axis is smaller than a distance from the movable contact to the axis.
    Type: Application
    Filed: July 15, 2022
    Publication date: January 19, 2023
    Applicant: Schneider Electric (Australia) Pty Ltd
    Inventors: Dahai Zhang, Yonggang Wang, Qilian Du, Xin Fan, Bo Wang
  • Publication number: 20220356426
    Abstract: A full-ocean-depth fidelity enzymological measurement device for microbial extracellular enzyme is provided, comprising a pressure-maintaining sampling bottle, pressure-maintaining transfer equipment, a pressure-maintaining enzymological reactor, and heat preservation equipment and enzyme activity detection equipment. The pressure-maintaining enzymological reactor comprises a barrel body, a plug, polytetrafluoroethylene gaskets, an O-ring, a piston, a high-pressure straight-through valve, and a high-pressure connector. The pressure-maintaining enzymological reactor is in a closed barrel body shape and is internally provided with the piston, and the plug and the valve are arranged at each of two ends of the pressure-maintaining enzymological reactor; and the valve is connected to the pressure-maintaining transfer equipment through the high-pressure connector.
    Type: Application
    Filed: May 3, 2022
    Publication date: November 10, 2022
    Inventors: Jiasong FANG, Junwei CAO, Jiawang CHEN, Binbin PAN, Hongge ZHANG, Han GE, Dahai ZHANG, Yuan LIN
  • Patent number: 11394197
    Abstract: It discloses a ring-connected bridge-type multi-port hybrid DC circuit breaker. When the number of ports is n, n is an integer greater than or equal to 2, the ring-connected bridge-type multi-port hybrid DC circuit breaker includes: an upper DC bus bar, a lower DC bus bar, n thyristor arms, n diode arms, a main breaker branch, and n bypass branches; each thyristor arm connects in series with a diode arm, forming a series circuit; a bypass branch is connected between every two adjacent series circuits, a port is provided at the connection point of the thyristor arm and the diode arm in each series circuit, and the port is used to connect the protected components or the DC lines.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: July 19, 2022
    Assignee: BEIJING JIAOTONG UNIVERSITY
    Inventors: Meng Li, Yiping Luo, Jinghan He, Yin Xu, Qiufang Zhang, Guomin Luo, Dahai Zhang, Xiaojun Wang, Fang Zhang, Xiangyu Wu, Pinghao Ni
  • Patent number: 11309147
    Abstract: Disclosed embodiments relate to a socket. A speed-control switch, including: a housing including a top plate provided with a central opening extending in a length direction; a push rod at least partially contained in the housing, and a first end of the push rod protruding out of the housing from the central opening and capable of sliding in the central opening; a plurality of connection terminals provided in pairs in the housing and configured to: selectively engage with a second end of the push rod opposite to the first end to limit a plurality of speed indications of the speed-control switch; and a speed selection assembly with a part thereof set on the top plate and configured to allow a selection for a plurality of speed indications of the speed-control switch as the push rod slides in the central opening. The speed-control switch achieve speed switching with a small force.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: April 19, 2022
    Assignee: SCHNEIDER ELECTRIC (AUSTRALIA) PTY LTD
    Inventors: Fuhua Shan, Zhen Ma, Dahai Zhang
  • Publication number: 20220093352
    Abstract: Disclosed embodiments relate to a socket. A speed-control switch, including: a housing including a top plate provided with a central opening extending in a length direction; a push rod at least partially contained in the housing, and a first end of the push rod protruding out of the housing from the central opening and capable of sliding in the central opening; a plurality of connection terminals provided in pairs in the housing and configured to: selectively engage with a second end of the push rod opposite to the first end to limit a plurality of speed indications of the speed-control switch; and a speed selection assembly with a part thereof set on the top plate and configured to allow a selection for a plurality of speed indications of the speed-control switch as the push rod slides in the central opening. The speed-control switch can achieve speed switching with a small force.
    Type: Application
    Filed: November 11, 2020
    Publication date: March 24, 2022
    Applicant: SCHNEIDER ELECTRIC (AUSTRALIA) PTY LTD
    Inventors: Fuhua SHAN, Zhen MA, Dahai ZHANG
  • Publication number: 20220006286
    Abstract: It discloses a ring-connected bridge-type multi-port hybrid DC circuit breaker. When the number of ports is n, n is an integer greater than or equal to 2, the ring-connected bridge-type multi-port hybrid DC circuit breaker includes: an upper DC bus bar, a lower DC bus bar, n thyristor arms, n diode arms, a main breaker branch, and n bypass branches; each thyristor arm connects in series with a diode arm, forming a series circuit; a bypass branch is connected between every two adjacent series circuits, a port is provided at the connection point of the thyristor arm and the diode arm in each series circuit, and the port is used to connect the protected components or the DC lines.
    Type: Application
    Filed: April 24, 2019
    Publication date: January 6, 2022
    Inventors: Meng LI, Yiping LUO, Jinghan HE, Yin XU, Qiufang ZHANG, Guomin LUO, Dahai ZHANG, Xiaojun WANG, Fang ZHANG, Xiangyu WU, Pinghao NI
  • Patent number: 11201020
    Abstract: Embodiments of the present disclosure provide a bracket, a functional module and a mounting method of an electrical device. The bracket described herein includes a body comprising a supporting portion adapted to support a functional component of the electrical device, a first coupling portion and a second coupling portion symmetrically arranged on the body with respect to a longitudinal axis of the supporting portion, and the second coupling portion is adapted to be coupled with the first coupling portion of a further bracket of the same specification to form a bracket set. The bracket described herein can be interlocked together, and the mounting component and the bracket are integrally formed. As a result, the appearance of the electrical device is improved, more mounting screws are saved, the mounting steps of the electrical device are reduced, and the mounting efficiency of the electrical device is improved.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: December 14, 2021
    Assignee: SCHNEIDER ELECTRIC (AUSTRALIA) PTY LTD
    Inventors: Dahai Zhang, Zhen Ma, Pei Shang
  • Patent number: D939455
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: December 28, 2021
    Assignee: SCHNEIDER ELECTRIC (AUSTRALIA) PTY LTD
    Inventors: Zhen Ma, Fuhua Shan, Dahai Zhang
  • Patent number: D948448
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: April 12, 2022
    Assignee: SCHNEIDER ELECTRIC (AUSTRALIA) PTY LTD
    Inventors: Zhen Ma, Fuhua Shan, Dahai Zhang, Pei Shang, Qilian Du
  • Patent number: D963598
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: September 13, 2022
    Assignee: Schneider Electric (Australia) PTY LTD
    Inventors: Zhen Ma, Fuhua Shan, Dahai Zhang
  • Patent number: D990434
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: June 27, 2023
    Assignee: Schneider Electric (Australia) PTY LTD
    Inventors: Jiayu Fu, Youliang Zhang, Dahai Zhang, Zhen Ma
  • Patent number: D1073618
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: May 6, 2025
    Assignee: Schneider Electric (Australia) PTY LTD
    Inventors: Zhen Ma, Fuhua Shan, Dahai Zhang, Pei Shang, Qilian Du
  • Patent number: D1073619
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: May 6, 2025
    Assignee: Schneider Electric (Australia) PTY LTD
    Inventors: Zhen Ma, Fuhua Shan, Dahai Zhang, Pei Shang, Qilian Du