Patents by Inventor Weixin Zhang

Weixin 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: 20210203227
    Abstract: The present invention discloses a modular multilevel dynamic switching DC-DC transformer, which consists of N DC-DC sub-modules connected in series. Each of the DC-DC sub-modules is of a symmetrical structure capable of realizing bidirectional power flow, which consists of two half-bridge sub-modules and isolating switches S1, S2 between capacitors C1, C2 of the two half-bridge sub-modules. The capacitors C1, C2 are disposed in parallel between the half-bridge sub-modules and the isolating switches. Assuming that the power flows in the primary side of the DC-DC transformer and flows out from the secondary side; the half-bridge sub-module located on the primary side of the DC-DC transformer is referred to as a primary-side sub-module; and, the half-bridge sub-module located on the secondary side of the DC-DC transformer is referred to as a secondary-side sub-modules.
    Type: Application
    Filed: January 29, 2018
    Publication date: July 1, 2021
    Applicant: Tianjin University
    Inventors: Bin LI, Weixin ZHANG
  • Publication number: 20210064798
    Abstract: The present invention discloses a power system reliability assessment method considering optimized scheduling of cascade hydropower stations, by which the reliability of the power system is improved, comprising following steps: establishing power system optimization models; inputting the sequential wind speed, runoff and load data within 24h; in accordance with reliability parameters of units and by the sequential Monte Carlo method, sampling the state durations of three kinds of units and segmenting the state durations on a 24-hour cycle; calculating the sequential output of wind farms within 24h according to wind speed data and the state of wind power units; calculating the hourly loss-of-load, according to the state of wind power units and thermal power units as well as the optimization models; optimizing for 365 days according to the method described in the step 4, and calculating reliability indices; and determining convergence or not, and if not, continuously repeating the steps S3 to S7 until convergen
    Type: Application
    Filed: August 6, 2020
    Publication date: March 4, 2021
    Inventors: Bo Hu, Kaigui Xie, Ye Li, Tao Niu, Wei Chen, Weixin Zhang
  • Publication number: 20210032740
    Abstract: The invention relates to an anti-corrosion conductive film and a pulse bias alternation-based magnetron sputtering deposition method and application thereof. The anti-corrosion conductive film is formed by sequentially forming an anti-corrosion protective layer, a stress transition layer and a conducting layer on the surface of a substrate by deposition through a high-low pulse bias alternation method.
    Type: Application
    Filed: January 21, 2019
    Publication date: February 4, 2021
    Inventors: Peiyun YI, Weixin ZHANG, Linfa PENG, Xinmin LAI
  • Patent number: 10807957
    Abstract: A tetradentate chelating monoquinoline derivative with a structure as shown in formula (I) is able to specifically chelate redox active metal ions like copper ions that are dis-regulated in neurodegenerative diseases (Alzheimer's disease, Huntington's disease, Parkinson's disease, and amyotrophic lateral sclerosis), or copper accumulation disease like Wilson's disease. The binding constants of these derivatives for zinc are 6-10 orders of magnitude below that ones for copper, and these derivatives have a good capability of reducing an oxidative stress. The method for preparing the derivative is simple and the derivatives have good application prospects in manufacturing drugs for neurodegenerative diseases and diseases related to disorder of copper metabolism.
    Type: Grant
    Filed: November 24, 2018
    Date of Patent: October 20, 2020
    Inventors: Yan Liu, Xingguo Liu, Weixin Zhang, Daya Huang, Meijie Huang, Dean Wang, Ju Huang, Siwei Shu, Michel Nguyen, Anne Robert, Bernard Meunier
  • Publication number: 20190092730
    Abstract: A tetradentate chelating monoquinoline derivative with a structure as shown in formula (I) is able to specifically chelate redox active metal ions like copper ions that are dis-regulated in neurodegenerative diseases (Alzheimer's disease, Huntington's disease, Parkinson's disease, and amyotrophic lateral sclerosis), or copper accumulation disease like Wilson's disease. The binding constants of these derivatives for zinc are 6-10 orders of magnitude below that ones for copper, and these derivatives have a good capability of reducing an oxidative stress. The method for preparing the derivative is simple and the derivatives have good application prospects in manufacturing drugs for neurodegenerative diseases and diseases related to disorder of copper metabolism.
    Type: Application
    Filed: November 24, 2018
    Publication date: March 28, 2019
    Inventors: Yan LIU, Xingguo LIU, Weixin ZHANG, Daya HUANG, Meijie HUANG, Dean WANG, Ju HUANG, Siwei SHU, Michel NGUTEN, Anne ROBERT, Bernard MEUNIER
  • Publication number: 20180248504
    Abstract: A brush-less DC motor control device includes a position detecting unit that detects the position of a motor rotor and acquires the position signals of the rotor, a reference generating unit that selects a reference time moment according to the rotor's position signal, a current measuring unit that measures the phase current of the motor and acquires the phase current at the reference time moment according to the measured phase current, a calculation unit that calculates the direct axis current of the motor according to the acquired phase current, a phase adjusting unit that adjusts the phase of the drive voltage of a motor coil according to the difference value between the direct axis current of the motor and an expected target current, and a drive unit that outputs drive signals of the motor coil according to the acquired position signal and the phase of the coil's drive voltage.
    Type: Application
    Filed: April 12, 2017
    Publication date: August 30, 2018
    Applicant: INTERNATIONAL GREEN CHIP (TIANJIN) CO., LTD.
    Inventors: Jianhui LIN, Weixin ZHANG, Weizheng XU
  • Patent number: 9923507
    Abstract: The present invention discloses a position-sensorless control method for a brushless motor, the method including: turning off a first driving voltage of a first phase coil, and within detection time, detecting a back electromotive force of the first phase coil; determining a reference phase and a cycle of a second driving voltage according to the back electromotive force; determining a pulse width modulation signal according to the reference phase and the cycle; and determining to provide the second driving voltage for the brushless motor according to the pulse width modulation signal, the second driving voltage being used to drive the brushless motor. The present invention effectively reduces the cost, decreases implementation difficulty and increases system performance and reliability.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: March 20, 2018
    Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
    Inventors: Jianhui Lin, Weixin Zhang
  • Publication number: 20170163205
    Abstract: The present invention discloses a position-sensorless control method for a brushless motor, the method including: turning off a first driving voltage of a first phase coil, and within detection time, detecting a back electromotive force of the first phase coil; determining a reference phase and a cycle of a second driving voltage according to the back electromotive force; determining a pulse width modulation signal according to the reference phase and the cycle; and determining to provide the second driving voltage for the brushless motor according to the pulse width modulation signal, the second driving voltage being used to drive the brushless motor. The present invention effectively reduces the cost, decreases implementation difficulty and increases system performance and reliability.
    Type: Application
    Filed: August 26, 2015
    Publication date: June 8, 2017
    Applicant: International Green Chip (Tianjin) Co., Ltd.
    Inventors: Jianhui LIN, Weixin ZHANG
  • Publication number: 20160275077
    Abstract: A method for automatically sending a multimedia file comprises: obtaining a voice feature of each object in a multimedia file (101); matching the obtained voice feature of each object with a voice feature of each contact in a voice parameter database (102); and when matching succeeds, automatically sending the multimedia file to a contact obtained by successful matching (103). Further disclosed are an apparatus for automatically sending a multimedia file, a mobile terminal, and a storage medium.
    Type: Application
    Filed: March 31, 2014
    Publication date: September 22, 2016
    Inventor: Weixin Zhang