Patents by Inventor Fu-San Hsu

Fu-San Hsu 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).

  • AC power supply and method for controlling output current thereof
    Patent number: 7633781
    Abstract: An AC power supply and a method for dynamically controlling the output current thereof are disclosed. An output voltage stop signal is used to disable a DC/AC converter from outputting. During a period that the DC/AC converter stops its output, the output current of the DC/AC converter is measured and is fed back to a output current control device as an output current feedback signal to produce a deviation. Using the difference between the output current feedback signal of the DC/AC converter and the deviation, an approximate DC value of the output current of the DC/AC converter is calculated. With reference to the approximate DC value, the DC/AC converter can be controlled so that the DC current injection in the output current is approximately zero.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: December 15, 2009
    Assignee: Phoenixtec Power Co., Ltd.
    Inventors: Fu-San Hsu, Jui-Chin Wu
  • AC power supply and method for controlling output current thereof
    Publication number: 20080259662
    Abstract: An AC power supply and a method for dynamically controlling the output current thereof are disclosed. An output voltage stop signal is used to disable a DC/AC converter from outputting. During a period that the DC/AC converter stops its output, the output current of the DC/AC converter is measured and is fed back to a output current control device as an output current feedback signal to produce a deviation. Using the difference between the output current feedback signal of the DC/AC converter and the deviation, an approximate DC value of the output current of the DC/AC converter is calculated. With reference to the approximate DC value, the DC/AC converter can be controlled so that the DC current injection in the output current is approximately zero.
    Type: Application
    Filed: April 19, 2007
    Publication date: October 23, 2008
    Inventors: Fu-San Hsu, Jui-Chin Wu