Patents by Inventor Nayeem Mahmud

Nayeem Mahmud 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).

  • Patent number: 10097120
    Abstract: An embodiment of a control system includes a pulse modulation module configured to generate a modulation signal controlling application of voltages to an electric motor, the modulation signal having a series of one or more successive pulses corresponding to a control cycle. The system also includes a current prediction module configured to receive a sampled electric current value from the electric motor taken at a sample time during a first control cycle n, predict a value of the electric current at a subsequent time related to an immediately following control cycle n+1 based on the sampled electric current value and a voltage applied to the motor during the first control cycle n, and output the predicted electric current value to the pulse modulation module. The system further includes a converter module configured to receive the modulation signal and output a voltage signal to the motor based on the modulation signal.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: October 9, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Prerit Pramod, Zhe Zhang, Nayeem Mahmud
  • Publication number: 20180091074
    Abstract: An embodiment of a control system includes a pulse modulation module configured to generate a modulation signal controlling application of voltages to an electric motor, the modulation signal having a series of one or more successive pulses corresponding to a control cycle. The system also includes a current prediction module configured to receive a sampled electric current value from the electric motor taken at a sample time during a first control cycle n, predict a value of the electric current at a subsequent time related to an immediately following control cycle n+1 based on the sampled electric current value and a voltage applied to the motor during the first control cycle n, and output the predicted electric current value to the pulse modulation module. The system further includes a converter module configured to receive the modulation signal and output a voltage signal to the motor based on the modulation signal.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 29, 2018
    Inventors: Prerit Pramod, Zhe Zhang, Nayeem Mahmud
  • Patent number: 9806656
    Abstract: An embodiment of a system for determining a sensor failure in a motor control system with at least three phase current measurements includes a magnitude computation module that determines a magnitude of a diagnostic voltage, the diagnostic voltage represented in a stator frame and based on a difference between an input voltage command and a final voltage command, and a phase evaluation module that determines a phase value of the diagnostic voltage based on the diagnostic voltage. The system also includes a sensor failure identification module that identifies a current sensor failure based on the phase value of the diagnostic voltage, the sensor failure represented by a failure signal, and a current calculation transition module that modifies a calculation scheme for determining a measurement of motor current based on the sensor failure.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: October 31, 2017
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Prerit Pramod, Nayeem Mahmud, Rakesh Mitra, Dennis B. Skellenger, Julie A. Kleinau