Patents by Inventor Leo Zheng

Leo Zheng 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: 10027232
    Abstract: The present invention provides a bi-directional DC/DC converter and a control method thereof. The bi-directional DC/DC converter comprises a push-pull circuit, a chargeable and dischargeable device, a transformer, a half bridge circuit, a rectifying and filtering circuit and a first switch. The primary side of the transformer is connected to an output of the push-pull circuit. The output of the rectifying and filtering circuit is connected across a bridge arm of the half bridge circuit. The first switch is configured to connect the secondary side of the transformer to an input of the rectifying and filtering circuit, or to connect a part of windings of the secondary side of the transformer to an output of the half bridge circuit while disconnecting the part of windings of the secondary side of the transformer from two terminals of the input of the rectifying and filtering circuit. The bi-directional DC/DC converter of the present invention has fewer components and is low in cost.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: July 17, 2018
    Inventors: Leo Zheng, David Zheng, Victory Li
  • Patent number: 9798364
    Abstract: A chassis used for an electronic device is disclosed, comprising: a main body (21) suitable for internally accommodating the electronic device, wherein the main body has an opening on at least one of its sides for accommodating the optional accessories of the electronic device; and a panel (22) for enclosing the opening when closed and exposing the opening when opened. The panel (22) is suitable to be connected with a cable (23), the first end of which is suitable for being electrically connected to the electronic device and the second end of which is suitable for being electrically connected to the optional accessories. The panel (22) maintains the cable (23) within the main body (21) when closed, and exposes the second end of the cable (23) when opened. According to an embodiment of the present invention, A UPS arranged inside the chassis described above is provided.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: October 24, 2017
    Assignee: Eaton Manufacturing LP, Glasgow Succursale De Morges
    Inventors: Leo Zheng, Tango Tang, Min Yin, Cheng Su
  • Publication number: 20170187296
    Abstract: The present invention provides a bi-directional DC/DC converter and a control method thereof. The bi-directional DC/DC converter comprises a push-pull circuit, a chargeable and dischargeable device, a transformer, a half bridge circuit, a rectifying and filtering circuit and a first switch. The primary side of the transformer is connected to an output of the push-pull circuit. The output of the rectifying and filtering circuit is connected across a bridge arm of the half bridge circuit. The first switch is configured to connect the secondary side of the transformer to an input of the rectifying and filtering circuit, or to connect a part of windings of the secondary side of the transformer to an output of the half bridge circuit while disconnecting the part of windings of the secondary side of the transformer from two terminals of the input of the rectifying and filtering circuit. The bi-directional DC/DC converter of the present invention has fewer components and is low in cost.
    Type: Application
    Filed: January 23, 2015
    Publication date: June 29, 2017
    Inventors: LEO ZHENG, DAVID ZHENG, VICTORY LI
  • Publication number: 20160034006
    Abstract: A chassis used for an electronic device is disclosed, comprising: a main body (21) suitable for internally accommodating the electronic device, wherein the main body has an opening on at least one of its sides for accommodating the optional accessories of the electronic device; and a panel (22) for enclosing the opening when closed and exposing the opening when opened. The panel (22) is suitable to be connected with a cable (23), the first end of which is suitable for being electrically connected to the electronic device and the second end of which is suitable for being electrically connected to the optional accessories. The panel (22) maintains the cable (23) within the main body (21) when closed, and exposes the second end of the cable (23) when opened. According to an embodiment of the present invention, A UPS arranged inside the chassis described above is provided.
    Type: Application
    Filed: November 15, 2013
    Publication date: February 4, 2016
    Inventors: Leo Zheng, Tango Tang, Min Yin, Cheng Su