Patents by Inventor Xuan CAI

Xuan CAI 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).

  • Patent number: 11808793
    Abstract: A detection device, an inverter, and a detection method are disclosed. The detection device is configured to detect a leakage current flowing through a conductor. The detection device includes a magnetic core, a detection winding and a calibration winding both wound on the magnetic core, a detection circuit, and a calibration circuit. The detection circuit is coupled to the detection winding, and configured to sample a detection signal of the detection winding to obtain a leakage current detection value. The calibration circuit is coupled to the calibration winding, and configured to provide a calibration signal to the calibration winding.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: November 7, 2023
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Yu-Xi Wang, Jun-Xiong Wu, Bing-Wen Weng, Xuan-Cai Zhu
  • Publication number: 20230020049
    Abstract: A detection device, an inverter, and a detection method are disclosed. The detection device is configured to detect a leakage current flowing through a conductor. The detection device includes a magnetic core, a detection winding and a calibration winding both wound on the magnetic core, a detection circuit, and a calibration circuit. The detection circuit is coupled to the detection winding, and configured to sample a detection signal of the detection winding to obtain a leakage current detection value. The calibration circuit is coupled to the calibration winding, and configured to provide a calibration signal to the calibration winding.
    Type: Application
    Filed: May 11, 2022
    Publication date: January 19, 2023
    Inventors: Yu-Xi WANG, Jun-Xiong WU, Bing-Wen WENG, Xuan-Cai ZHU
  • Patent number: 10745363
    Abstract: Provided are crystal forms A, B, D, E, F, G and H of valsartan disodium salt and a preparation method therefor.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: August 18, 2020
    Assignee: NANJING NORATECH PHARMACEUTICALS CO., LTD
    Inventors: Fei Liu, Gang Wu, Weiming Jiang, Cheng-Gang Lin, Xuan Cai, Ping Lin, Yuling Lu, Lixiang Liu
  • Patent number: 10683260
    Abstract: Provided are new crystalline forms A, B, C, D and E of sacubitril sodium salt and a method for preparation thereof, pharmaceutical compositions thereof, and application thereof in preparing drugs for enkephalinase-related diseases.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: June 16, 2020
    Assignee: NANJING NORATECH PHARMACEUTICALS CO., LTD.
    Inventors: Fei Liu, Gang Wu, Weiming Jiang, Cheng-Gang Lin, Xuan Cai, Ping Lin, Yuling Lu, Lixiang Liu
  • Publication number: 20190202776
    Abstract: Provided are new crystalline forms A, B, C, D and E of sacubitril sodium salt and a method for preparation thereof, pharmaceutical compositions thereof, and application thereof in preparing drugs for enkephalinase-related diseases.
    Type: Application
    Filed: September 7, 2016
    Publication date: July 4, 2019
    Applicant: NORATECH PHARMACEUTICALS, INC.
    Inventors: Fei LIU, Gang WU, Weiming JIANG, Cheng-Gang LIN, Xuan CAI, Ping LIN, Yuling LU, Lixiang LIU
  • Publication number: 20190194149
    Abstract: Provided are crystal forms A, B, D, E, F, G and H of valsartan disodium salt and a preparation method therefor.
    Type: Application
    Filed: September 2, 2016
    Publication date: June 27, 2019
    Applicant: NORATECH PHARMACEUTICALS, INC.
    Inventors: Fei LIU, Gang WU, Weiming JIANG, Cheng-Gang LIN, Xuan CAI, Ping LIN, Yuling LU, Lixiang LIU
  • Patent number: 9231488
    Abstract: A power converter includes a full-bridge converter circuit and a regulation circuit. The full-bridge converter circuit includes a full-bridge circuit having a first and a second input terminals and a first and a second output terminals. The regulation circuit is bridged across the first and the second input terminals of the full-bridge circuit and connected to the first output terminal of the full-bridge circuit. The regulation circuit is configured for operatively regulating an output voltage across the first and the second output terminals of the full-bridge circuit by cooperating with the full-bridge converter circuit, such that the output voltage across the first and the second output terminals of the full-bridge circuit has more than three voltage levels. A method for controlling a power converter is also disclosed herein.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: January 5, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Xuan-Cai Zhu, Bing-Wen Weng
  • Publication number: 20150214831
    Abstract: The present invention discloses an inverter and a control method thereof. The inverter includes a first bridge leg having a series of first switch, second switch, third switch, fourth switch and fifth switch, and a second first bridge leg having a series of sixth switch, seventh switch, eighth switch, ninth switch, tenth switch. The control method includes steps of synchronously turning on or off the first switch, second switch, ninth switch and tenth switch, controlling that an on/off state of the third switch or eighth switch is complementary to an on/off state of the first switch, second switch, ninth switch and tenth switch, and synchronously turning on or off the fourth switch, fifth switch, sixth switch and seventh switch.
    Type: Application
    Filed: December 22, 2014
    Publication date: July 30, 2015
    Inventors: Bing-Wen WENG, Xuan-Cai ZHU, Ke-Rou WANG
  • Patent number: 9093897
    Abstract: The present invention discloses an inverter and a control method thereof. The inverter includes a first bridge leg having a series of first switch, second switch, third switch, fourth switch and fifth switch, and a second first bridge leg having a series of sixth switch, seventh switch, eighth switch, ninth switch, tenth switch. The control method includes steps of synchronously turning on or off the first switch, second switch, ninth switch and tenth switch, controlling that an on/off state of the third switch or eighth switch is complementary to an on/off state of the first switch, second switch, ninth switch and tenth switch, and synchronously turning on or off the fourth switch, fifth switch, sixth switch and seventh switch.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: July 28, 2015
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Bing-Wen Weng, Xuan-Cai Zhu, Ke-Rou Wang
  • Publication number: 20140119060
    Abstract: A power converter includes a full-bridge converter circuit and a regulation circuit. The full-bridge converter circuit includes a full-bridge circuit having a first and a second input terminals and a first and a second output terminals. The regulation circuit is bridged across the first and the second input terminals of the full-bridge circuit and connected to the first output terminal of the full-bridge circuit. The regulation circuit is configured for operatively regulating an output voltage across the first and the second output terminals of the full-bridge circuit by cooperating with the full-bridge converter circuit, such that the output voltage across the first and the second output terminals of the full-bridge circuit has more than three voltage levels. A method for controlling a power converter is also disclosed herein.
    Type: Application
    Filed: January 2, 2013
    Publication date: May 1, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Xuan-Cai ZHU, Bing-Wen WENG
  • Publication number: 20120193917
    Abstract: The invention discloses a pitch control system for a wind turbine and a method, comprising a main controller, a secondary controller, a motor and a pitch gearbox, wherein the main controller is connected with a plurality of the secondary controllers through a communication bus; each blade corresponds to one controller and at least two motors, and one pitch gearbox is driven by each motor. The main controller is used for calculating a pitch expected value according to wind speed as well as power and rotation speed of a generator; and the motor is driven by the secondary controller according to the pitch expected value, so as to drive the pitch gearbox and hence drive the blades to vary a pitch angle.
    Type: Application
    Filed: January 20, 2012
    Publication date: August 2, 2012
    Applicant: SINOVEL WIND GROUP CO., LTD.
    Inventors: XI CHEN, Lei Li, Xuan Cai
  • Publication number: 20120041609
    Abstract: The present invention provides a control method of an automatic lubrication system of a variable-pitch bearing used for a wind turbine generator system (WTGS).
    Type: Application
    Filed: April 13, 2011
    Publication date: February 16, 2012
    Applicant: SINOVEL WIND GROUP CO., LTD.
    Inventors: Lifu XIN, Xuan CAI, Lei LI