Patents by Inventor Shaui Wang

Shaui Wang 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).

  • Power converter protection circuit
    Patent number: 11456677
    Abstract: A power conversion system includes a first switch configured to be connected between a first phase of a polyphase alternating current (AC) power source and an electrical load and a first diode configured to be connected between the first phase of the polyphase AC power source and the electrical load, the diode configured to conduct a current from the AC power source to the electrical load. The power conversion system also includes a control unit configured to interface with the first switch to close, responsive to the occurrence of a short circuit fault, the first switch during a negative current portion of the AC cycle of the first phase of the polyphase AC power source and open, responsive to the occurrence of the short circuit fault, the first switch during a positive current portion of the AC cycle of the first phase of the polyphase AC power source.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: September 27, 2022
    Assignees: Rolls-Royce Corporation, Rolls-Royce Singapore Pte. Ltd.
    Inventors: Shaui Wang, Chandana Jayampathi Gajanayake, Suvajit Mukherjee, Souvik Dasgupta, David Russell Trawick
  • POWER CONVERTER PROTECTION CIRCUIT
    Publication number: 20220190591
    Abstract: A power conversion system includes a first switch configured to be connected between a first phase of a polyphase alternating current (AC) power source and an electrical load and a first diode configured to be connected between the first phase of the polyphase AC power source and the electrical load, the diode configured to conduct a current from the AC power source to the electrical load. The power conversion system also includes a control unit configured to interface with the first switch to close, responsive to the occurrence of a short circuit fault, the first switch during a negative current portion of the AC cycle of the first phase of the polyphase AC power source and open, responsive to the occurrence of the short circuit fault, the first switch during a positive current portion of the AC cycle of the first phase of the polyphase AC power source.
    Type: Application
    Filed: December 10, 2020
    Publication date: June 16, 2022
    Inventors: Shaui Wang, Chandana Jayampathi Gajanayake, Suvajit Mukherjee, Souvik Dasgupta, David Russell Trawick