Patents by Inventor Huajian Zhang

Huajian 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).

  • Patent number: 9647908
    Abstract: A method, apparatus and system for determining software performance. After the software is published, performance parameters of operation systems of running the software and performance parameters of run software are acquired from various user terminals. The performance parameters of the operation system of running the software and the performance parameters of the run software is processed to acquire a performance parameter processing result according to a preset method for processing a performance parameter. Performance of the software is determined according to the performance parameter processing result.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: May 9, 2017
    Assignee: Tencent Technology (Shenzhen) Company Limited
    Inventor: Huajian Zhang
  • Publication number: 20150244592
    Abstract: A method, apparatus and system for determining software performance. After the software is published, performance parameters of operation systems of running the software and performance parameters of run software are acquired from various user terminals. The performance parameters of the operation system of running the software and the performance parameters of the run software is processed to acquire a performance parameter processing result according to a preset method for processing a performance parameter. Performance of the software is determined according to the performance parameter processing result.
    Type: Application
    Filed: April 28, 2015
    Publication date: August 27, 2015
    Inventor: Huajian ZHANG
  • Patent number: 7932632
    Abstract: A switching power supply with overvoltage protection includes a soft start circuit, a rectifying circuit, a filter capacitor, a main supply, an auxiliary supply and a monitoring circuit. When the input voltage is higher than the predetermined protection voltage, a first electric control switch is turned off, and the main power circuit of the switching power supply is shut off. At the moment, the actuation and release of the second electric control switch is controlled so as to control the input power supply to intermittently charge the power supply module such that the output voltage downstream of the rectifying circuit inside the power supply is controlled in a safe range. For instance, the second electric control is turned on when the output voltage is lower than a certain value, and is turned off when the output voltage is higher than a certain value.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: April 26, 2011
    Assignee: Emerson Network Power Energy Systems AB
    Inventors: Huajian Zhang, Yonggang Ru, Shiqiang Yu, Baoguo Chen
  • Patent number: 7791904
    Abstract: An improved inductance-voltage clamping full-bridge soft-switch circuit including a full-bridge converter, a transformer, an output rectifying unit, an inductor, a clamping resistor, a capacitor, a first clamping diode, and a second clamping diode. The inductor includes a first winding used as an auxiliary inductor and a second winding used for clamping. A capacitor is connected in parallel with the clamping resistor connected in series.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: September 7, 2010
    Assignee: Emerson Network Power Energy System AB
    Inventors: Huajian Zhang, Yanfeng Li, Yonggang Ru
  • Publication number: 20090152950
    Abstract: A switching power supply with overvoltage protection includes a soft start circuit, a rectifying circuit, a filter capacitor, a main supply, an auxiliary supply and a monitoring circuit. When the input voltage is higher than the predetermined protection voltage, a first electric control switch is turned off, and the main power circuit of the switching power supply is shut off. At the moment, the actuation and release of the second electric control switch is controlled so as to control the input power supply to intermittently charge the power supply module such that the output voltage downstream of the rectifying circuit inside the power supply is controlled in a safe range. For instance, the second electric control is turned on when the output voltage is lower than a certain value, and is turned off when the output voltage is higher than a certain value.
    Type: Application
    Filed: January 6, 2006
    Publication date: June 18, 2009
    Applicant: EMERSON NETWORK POWER ENERGY SYSTEMS AB
    Inventors: Huajian Zhang, Yonggang Ru, Shiqiang Yu, Baoguo Chen
  • Publication number: 20090097279
    Abstract: The present invention discloses an improved inductance-voltage clamping full-bridge soft-switch circuit, comprising a full-bridge converter, a transformer, an output rectifying unit, an inductor, a clamping resistor, a capacitor, a first clamping diode and a second clamping diode. The inductor includes a first winding used as an auxiliary inductor and a second winding used for clamping. The present invention greatly reduces the transient current stress on the clamping resistor by connecting a capacitor in parallel with the clamping resistor connected in series, thereby effectively enhancing the reliability of the clamping resistor and improving the reliability of the overall circuit.
    Type: Application
    Filed: January 6, 2006
    Publication date: April 16, 2009
    Inventors: Huajian Zhang, Yanfeng Li, Yonggang Ru