Patents by Inventor Prerit Terway

Prerit Terway 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).

  • Motor position calibration
    Patent number: 11316460
    Abstract: A method of determining an electrical angle offset of a motor position sensor mounted to a multi-phase electric motor, the method comprising rotating a rotor of the multi-phase electric motor at a motor velocity using an external drive system, measuring a motor phase voltage of each phase of the multi-phase electric motor, the motor phase voltage comprising a back-EMF generated by the rotation of the motor, converting the motor phase voltage to a DQ reference frame to form a DQ motor phase voltage and calculating the electrical angle offset from the DQ motor phase voltages.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: April 26, 2022
    Assignees: ZF Active Safety and Electronics US LLC
    Inventors: Christopher David Dixon, Peter Geoffrey Scotson, Connel Brett Williams, Prerit Terway
  • Motor control system
    Patent number: 11316459
    Abstract: A control system for an electric motor comprises a controller which receives as an input a demanded motor current and produces at an output an intermediate voltage demand signal, a voltage demand signal correction means arranged to generate a voltage demand correction signal, and a combining means arranged to combine the intermediate voltage demand signal and the voltage demand correction signal to produce an actual voltage demand signal that is applied to the motor by pulse width modulation of the switches of a motor bridge driver. The correction signal compensates for unwanted non-linearities caused by interlock delays in the switching of the motor bridge switches.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: April 26, 2022
    Assignees: ZF Active Safety and Electronics US LLC, ZF Friedrichshafen AG
    Inventors: Christopher David Dixon, Connel Brett Williams, Prerit Terway, Abraham Ghafari, Hassan Lamsahel, Mesut Er
  • MOTOR POSITION CALIBRATION
    Publication number: 20210159830
    Abstract: A method of determining an electrical angle offset of a motor position sensor mounted to a multi-phase electric motor, the method comprising rotating a rotor of the multi-phase electric motor at a motor velocity using an external drive system, measuring a motor phase voltage of each phase of the multi-phase electric motor, the motor phase voltage comprising a back-EMF generated by the rotation of the motor, converting the motor phase voltage to a DQ reference frame to form a DQ motor phase voltage and calculating the electrical angle offset from the DQ motor phase voltages.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 27, 2021
    Applicants: ZF AUTOMOTIVE UK LIMITED, ZF Active Safety and Electronics US LLC
    Inventors: Christopher David Dixon, Peter Geoffrey Scotson, Connel Brett Williams, Prerit Terway
  • Motor Control System
    Publication number: 20200059180
    Abstract: A control system for an electric motor comprises a controller which receives as an input a demanded motor current and produces at an output an intermediate voltage demand signal, a voltage demand signal correction means arranged to generate a voltage demand correction signal, and a combining means arranged to combine the intermediate voltage demand signal and the voltage demand correction signal to produce an actual voltage demand signal that is applied to the motor by pulse width modulation of the switches of a motor bridge driver. The correction signal compensates for unwanted non-linearities caused by interlock delays in the switching of the motor bridge switches.
    Type: Application
    Filed: December 16, 2016
    Publication date: February 20, 2020
    Applicants: TRW Limited, TRW Automotive US LLC, ZF Friedrichshafen AG
    Inventors: Christopher David Dixon, Connel Brett Williams, Prerit Terway, Abraham Ghafari, Hassan Lamsahel, Mesut Er