Patents by Inventor Jen-Chung Liao

Jen-Chung Liao 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).

  • Uninterruptible power supply
    Patent number: 9083200
    Abstract: Disclosed is an uninterruptible power supply, including a rectifier for generating a DC voltage; an energy storage unit; an inverter for converting the DC voltage into a three-phase modulating voltage; a filter; a bypass switch circuit for selectively outputting a three-phase AC voltage or the three-phase modulating voltage as a three-phase load voltage; and a control circuit for controlling the operation of the uninterruptible power supply. The control circuit may use a flux compensation block with different operating modes to adjust the three-phase load voltage at the startup phase of a second inductive load and at the stable phase of the second inductive load, thereby compensating or correcting the flux of the second inductive load to prevent the flux distribution of the second inductive load from being saturated.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: July 14, 2015
    Assignees: DELTA ELECTRONICS, INC., NATIONAL TSING HUA UNIVERSITY
    Inventors: Wen-Yin Tsai, Jen-Chung Liao, Po-Tai Cheng, Yu-Hsing Chen
  • UNINTERRUPTIBLE POWER SUPPLY
    Publication number: 20130015704
    Abstract: Disclosed is an uninterruptible power supply, including a rectifier for generating a DC voltage; an energy storage unit; an inverter for converting the DC voltage into a three-phase modulating voltage; a filter; a bypass switch circuit for selectively outputting a three-phase AC voltage or the three-phase modulating voltage as a three-phase load voltage; and a control circuit for controlling the operation of the uninterruptible power supply. The control circuit may use a flux compensation block with different operating modes to adjust the three-phase load voltage at the startup phase of a second inductive load and at the stable phase of the second inductive load, thereby compensating or correcting the flux of the second inductive load to prevent the flux distribution of the second inductive load from being saturated.
    Type: Application
    Filed: May 25, 2012
    Publication date: January 17, 2013
    Applicants: NATIONAL TSING HUA UNIVERSITY, DELTA ELECTRONICS, INC.
    Inventors: Wen-Yin Tsai, Jen-Chung Liao, Po-Tai Cheng, Yu-Hsing Chen