Patents by Inventor Darren Qu

Darren Qu 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).

  • Detection of unbalanced phase resistances in synchronous motor drives
    Patent number: 11804799
    Abstract: A system for controlling a synchronous motor drive may be configured to receive a command voltage signal and to identify, in the synchronous motor drive, a resistance imbalance signature from the command voltage signal. The system may determine, based on the resistance imbalance signature, respective phase resistances that correspond to phases of a synchronous motor of the synchronous motor drive. Each respective phase resistance may include a phase transistor resistance and a phase winding resistance. The system may identify, based on the phase resistances and an estimated average resistance between the phases of the synchronous motor, one or more phases of the synchronous motor that correspond to one or more phase resistances representing a resistance imbalance.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: October 31, 2023
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Prerit Pramod, Rakesh Mitra, Darren Qu, Subhra Paul, Julie A. Kleinau
  • DETECTION OF UNBALANCED PHASE RESISTANCES IN SYNCHRONOUS MOTOR DRIVES
    Publication number: 20210305929
    Abstract: A system for controlling a synchronous motor drive may be configured to receive a command voltage signal and to identify, in the synchronous motor drive, a resistance imbalance signature from the command voltage signal. The system may determine, based on the resistance imbalance signature, respective phase resistances that correspond to phases of a synchronous motor of the synchronous motor drive. Each respective phase resistance may include a phase transistor resistance and a phase winding resistance. The system may identify, based on the phase resistances and an estimated average resistance between the phases of the synchronous motor, one or more phases of the synchronous motor that correspond to one or more phase resistances representing a resistance imbalance.
    Type: Application
    Filed: March 31, 2020
    Publication date: September 30, 2021
    Inventors: Prerit Pramod, Rakesh Mitra, Darren Qu, Subhra Paul, Julie A. Kleinau