Patents by Inventor Weiqiang Shi

Weiqiang 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).

  • Method for Boosting Current Compensation in Auxiliary Resonant Commutated Pole Inverter (ARCPI) with Saturable Inductor
    Publication number: 20240146212
    Abstract: A method for an auxiliary device of an auxiliary resonant commutated pole inverter (ARCPI) to determine a boosting time of the ARCPI is provided. The auxiliary device includes an auxiliary switch path that uses a resonant inductor with at least one saturable inductor. The method includes: calculating, by a processor of the auxiliary device, a first boosting time in the auxiliary switch path based on a theoretical resonance inductance and a voltage that are applied to the resonant inductor; determining, by the processor, a second boosting time in the auxiliary switch path based on a look-up table; and determining, by the processor, the boosting time in the auxiliary switch path based on the first boosting time and the second boosting time. The method further includes controlling, by the processor, boosting current of the ARCPI based on the boosting time in the auxiliary switch path.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 2, 2024
    Applicant: ABB Schweiz AG
    Inventors: Eddy C. Aeloiza, Yuxiang Shi, Goran Mandic, Weiqiang Chen
  • Continuously tunable solid state ultraviolet coherent light source
    Patent number: 5633883
    Abstract: A compact solid state source of coherent laser light in the range of about 298 nm through about 355 nm utilizes a Nd:YAG or Nd:YLF laser to pump a tunable Ti:Al.sub.2 O.sub.3 laser. The beam from the Nd:YAG/Nd:YLF laser is then combined in a nonlinear optical crystal with the tunable beam from the Ti:Al.sub.2 O.sub.3 laser to provide a continuously tunable laser beam in the range of about 298 nm through about 355 nm.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: May 27, 1997
    Assignee: Cedars-Sinai Medical Center
    Inventors: Weiqiang Shi, Warren S. Grundfest
  • Continuously tunable solid state ultraviolet coherent light source
    Patent number: 5363388
    Abstract: A compact solid state source of coherent laser light in the range of about 298 nm through about 355 nm utilizes a Nd:YAG or Nd:YLF laser to pump a tunable Ti:Al.sub.2 O.sub.3 laser. The beam from the Nd:YAG/Nd:YLF laser is then combined in a nonlinear optical crystal with the tunable beam from the Ti:Al.sub.2 O.sub.3 laser to provide a continuously tunable laser beam in the range of about 298 nm through about 355 nm.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: November 8, 1994
    Assignee: Cedars-Sinai Medical Center
    Inventors: Weiqiang Shi, Warren S. Grundfest