Patents by Inventor Fuzhou WANG

Fuzhou 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).

  • Current limiting control method for diode neutral-point-clamped three-level inverter and related circuit
    Patent number: 9531185
    Abstract: The present disclosure discloses a current limiting control method for a diode neutral-point-clamped three-level inverter and a related circuit. When a current in switching tubes is lowered to a value not greater than a first preset current value, the current limiting control method for a diode neutral-point-clamped three-level inverter and the related circuit drive an inside switching tube of the switching tubes to be turned on; after a first delay time, drive another inside switching tube to be turned on; after a second delay time, control an inside switching tube to be turned off and the other inside switching tube to be normally turned on; and control all the switching tubes to be turned on or off according to a control time sequence of the diode neutral-point-clamped three-level inverter circuit.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: December 27, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kelei Liu, Fuzhou Wang, Yihang Lv
  • CURRENT LIMITING CONTROL METHOD FOR DIODE NEUTRAL-POINT-CLAMPED THREE-LEVEL INVERTER AND RELATED CIRCUIT
    Publication number: 20140204636
    Abstract: The present disclosure discloses a current limiting control method for a diode neutral-point-clamped three-level inverter and a related circuit. When a current in switching tubes is lowered to a value not greater than a first preset current value, the current limiting control method for a diode neutral-point-clamped three-level inverter and the related circuit drive an inside switching tube of the switching tubes to be turned on; after a first delay time, drive another inside switching tube to be turned on; after a second delay time, control an inside switching tube to be turned off and the other inside switching tube to be normally turned on; and control all the switching tubes to be turned on or off according to a control time sequence of the diode neutral-point-clamped three-level inverter circuit.
    Type: Application
    Filed: March 25, 2014
    Publication date: July 24, 2014
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Kelei LIU, Fuzhou WANG, Yihang LV