Patents by Inventor I-Hsuan WU

I-Hsuan WU 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).

  • Phase-loss detection apparatus of three-phase AC power source and method of detecting phase loss
    Patent number: 11567112
    Abstract: A method of detecting phase loss of a three-phase AC power source includes steps of: acquiring any two line voltages of the AC power source with a first cycle period, acquiring a first digital signal and a second digital signal, performing an exclusive OR operation between the first digital signal and the second digital signal to generate a level signal, accumulating a high-level time count value, or accumulating a low-level time count value, resetting the low-level time count value when the high-level time count value is accumulated, or resetting the high-level time count value when the low-level time count value is accumulated, and determining that the AC power source occurs a phase-loss abnormality when the high-level time count value is greater than or equal to ? of the first cycle period or the low-level time count value is greater than or equal to ? of the first cycle period.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: January 31, 2023
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Lon-Jay Cheng, Shao-Chuan Chien, Shu-Hung Liao, I-Hsuan Wu
  • PHASE-LOSS DETECTION APPARATUS OF THREE-PHASE AC POWER SOURCE AND METHOD OF DETECTING PHASE LOSS
    Publication number: 20220291264
    Abstract: A method of detecting phase loss of a three-phase AC power source includes steps of: acquiring any two line voltages of the AC power source with a first cycle period, acquiring a first digital signal and a second digital signal, performing an exclusive OR operation between the first digital signal and the second digital signal to generate a level signal, accumulating a high-level time count value, or accumulating a low-level time count value, resetting the low-level time count value when the high-level time count value is accumulated, or resetting the high-level time count value when the low-level time count value is accumulated, and determining that the AC power source occurs a phase-loss abnormality when the high-level time count value is greater than or equal to ? of the first cycle period or the low-level time count value is greater than or equal to ? of the first cycle period.
    Type: Application
    Filed: June 24, 2021
    Publication date: September 15, 2022
    Inventors: Lon-Jay CHENG, Shao-Chuan CHIEN, Shu-Hung LIAO, I-Hsuan WU