Patents by Inventor Shu Yuen Chow

Shu Yuen Chow 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).

  • Reduced current sharing ripple
    Patent number: 11588394
    Abstract: In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.
    Type: Grant
    Filed: May 15, 2021
    Date of Patent: February 21, 2023
    Assignee: AES Global Holdings PTE Ltd.
    Inventors: Zhizhi Li, Ka Kit Li, Chung Hang Ling, Hing Hei Tsang, Chi Chung Wong, Shu Yuen Chow
  • REDUCED CURRENT SHARING RIPPLE
    Publication number: 20220368213
    Abstract: In the parallel operation of power supply units, a high line ripple current may be observed in output when the power supply units (PSUs) are supplied with different inputs. For example, a high line ripple current may be observed when PSUs were supplied with different line frequency inputs and/or when PSUs were supplied with different phase angle input lines. A low pass filter is in a control loop which is capable of filtering the line frequency to get an average current reference signal. The average current reference signal is compared with the real time output current to generate an error signal. This error signal is fed back to a voltage control loop to adjust the output in order to compensate the line ripple.
    Type: Application
    Filed: May 15, 2021
    Publication date: November 17, 2022
    Applicant: AES Global Holdings PTE Ltd.
    Inventors: Zhizhi Li, Ka Kit Li, Chung Hang Ling, Hing Hei Tsang, Chi Chung Wong, Shu Yuen Chow