Patents by Inventor Lucy Zhong

Lucy Zhong 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).

  • Switched current power converter with reduced power losses during low load conditions
    Patent number: 7586765
    Abstract: A switched current power converter includes an input power source, an output terminal, and a plurality of current stages. Each of the current stages includes a converter coupled to the input power source for providing a current and a switch circuit that selectively couples the current in such current stage to the output terminal. A control circuit decouples the input power source from the current stage converters upon detection of a low load condition. Optionally, the power converter includes a low load circuit responsive to the control circuit that selectively couples current to the output terminal during the low load condition.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: September 8, 2009
    Assignee: Astec International Limited
    Inventors: Laurence McGarry, William Lee, Owen Jiang, Horace Liang, Lucy Zhong
  • Switched current power converter with partial converter decoupling for low load conditions
    Patent number: 7414868
    Abstract: A switched current power converter including an input power source, an output terminal, and a plurality of current stages. Each current stage includes a converter coupled to the input power source for providing a current, and a switch circuit for selectively coupling the current in such current stage to the output terminal. A control circuit selectively decouples the input power source from less than all of the current stage converters upon detecting a low load condition, thereby reducing circulating current losses and improving operating efficiency under low load conditions.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: August 19, 2008
    Assignee: Astec International Limited
    Inventors: William Lee, Lucy Zhong, Horace Liang, Owen Jiang
  • Switched current power converter with reduced power losses during low load conditions
    Publication number: 20070025127
    Abstract: A switched current power converter includes an input power source, an output terminal, and a plurality of current stages. Each of the current stages includes a converter coupled to the input power source for providing a current and a switch circuit that selectively couples the current in such current stage to the output terminal. A control circuit decouples the input power source from the current stage converters upon detection of a low load condition. Optionally, the power converter includes a low load circuit responsive to the control circuit that selectively couples current to the output terminal during the low load condition.
    Type: Application
    Filed: July 26, 2005
    Publication date: February 1, 2007
    Inventors: Laurence McGarry, William Lee, Owen Jiang, Horace Liang, Lucy Zhong
  • Switched current power converter with partial converter decoupling for low load conditions
    Publication number: 20060285370
    Abstract: A switched current power converter including an input power source, an output terminal, and a plurality of current stages. Each current stage includes a converter coupled to the input power source for providing a current, and a switch circuit for selectively coupling the current in such current stage to the output terminal. A control circuit selectively decouples the input power source from less than all of the current stage converters upon detecting a low load condition, thereby reducing circulating current losses and improving operating efficiency under low load conditions.
    Type: Application
    Filed: June 20, 2005
    Publication date: December 21, 2006
    Inventors: William Lee, Lucy Zhong, Horace Liang, Owen Jiang