Patents by Inventor Hwai-Ching Shi

Hwai-Ching Shi 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).

  • Alternating current line emulator
    Patent number: 8773094
    Abstract: An alternating current (AC) line emulator includes an AC power supply and an automatic regulating load. The AC power supply is used for providing an AC line frequency and an AC line voltage. The automatic regulating load is coupled between the AC power supply and a grid-connected power generation system for functioning as a test load of the grid-connected power generation system, and preventing current from reversing to the AC power supply and shutting down the AC power supply. When the grid-connected power system is tested, power consumption of the automatic regulating load is equal to a sum of output power of the grid-connected power generation system and output power of the AC power supply.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: July 8, 2014
    Assignee: Motech Industries Inc.
    Inventors: Yung-Hsiang Liu, Kuo-Hsin Chu, Hsu-Chin Wu, Hwai-Ching Shi, Wei-Kang Liang
  • ALTERNATING CURRENT LINE EMULATOR
    Publication number: 20130063993
    Abstract: An alternating current (AC) line emulator includes an AC power supply and an automatic regulating load. The AC power supply is used for providing an AC line frequency and an AC line voltage. The automatic regulating load is coupled between the AC power supply and a grid-connected power generation system for functioning as a test load of the grid-connected power generation system, and preventing current from reversing to the AC power supply and shutting down the AC power supply. When the grid-connected power system is tested, power consumption of the automatic regulating load is equal to a sum of output power of the grid-connected power generation system and output power of the AC power supply.
    Type: Application
    Filed: December 14, 2011
    Publication date: March 14, 2013
    Inventors: Yung-Hsiang Liu, Kuo-Hsin Chu, Hsu-Chin Wu, Hwai-Ching Shi, Wei-Kang Liang