Patents by Inventor Andraw Chih-Feng Ho

Andraw Chih-Feng Ho 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).

  • HIGH EFFICIENCY CONTROL METHOD FOR UPS
    Publication number: 20230352970
    Abstract: An Uninterruptible Power Supply (UPS) including a charger configured to convert input AC power into DC power having a first voltage level, a DC-DC converter configured to convert the DC power having the first voltage level into DC power having a DC bus voltage level, a DC bus coupled to the DC-DC converter, an inverter coupled to the output via an output switch and configured to convert the DC power having the DC bus voltage level into output AC power, a bypass line including a bypass switch coupled between the input and the output switch, a rectifier coupled between the bypass line and the DC bus, and a controller configured to operate the UPS in a first mode of operation to provide DC power to the DC bus via the DC-DC converter and in a second mode of operation to provide DC power to the DC bus via the rectifier.
    Type: Application
    Filed: May 5, 2023
    Publication date: November 2, 2023
    Applicant: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Andraw Chih-Feng Ho, Kuo-Liang Lee
  • High efficiency control method for UPS
    Patent number: 11689047
    Abstract: An Uninterruptible Power Supply (UPS) including a charger configured to convert input AC power into DC power having a first voltage level, a DC-DC converter configured to convert the DC power having the first voltage level into DC power having a DC bus voltage level, a DC bus coupled to the DC-DC converter, an inverter coupled to the output via an output switch and configured to convert the DC power having the DC bus voltage level into output AC power, a bypass line including a bypass switch coupled between the input and the output switch, a rectifier coupled between the bypass line and the DC bus, and a controller configured to operate the UPS in a first mode of operation to provide DC power to the DC bus via the DC-DC converter and in a second mode of operation to provide DC power to the DC bus via the rectifier.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: June 27, 2023
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Andraw Chih-Feng Ho, Kuo-Liang Lee
  • HIGH EFFICIENCY CONTROL METHOD FOR UPS
    Publication number: 20220131406
    Abstract: An Uninterruptible Power Supply (UPS) including a charger configured to convert input AC power into DC power having a first voltage level, a DC-DC converter configured to convert the DC power having the first voltage level into DC power having a DC bus voltage level, a DC bus coupled to the DC-DC converter, an inverter coupled to the output via an output switch and configured to convert the DC power having the DC bus voltage level into output AC power, a bypass line including a bypass switch coupled between the input and the output switch, a rectifier coupled between the bypass line and the DC bus, and a controller configured to operate the UPS in a first mode of operation to provide DC power to the DC bus via the DC-DC converter and in a second mode of operation to provide DC power to the DC bus via the rectifier.
    Type: Application
    Filed: September 27, 2021
    Publication date: April 28, 2022
    Inventors: Andraw Chih-Feng Ho, Kuo-Liang Lee