Gopinath G R Assistant Professor Department of Electrical & Electronics Engineering

Dr. Gopinath G R is an Assistant Professor in the Electrical & Electronics Engineering Department at Mahindra École Centrale College of Engineering. Prior to joining MEC, he worked as a Senior Student Research associate at Indian Institute Of Technology, Kanpur.

  • Education
    • 2010 - Present: Ph.D. in Electrical Engineering from Indian Institute of Technology, Kanpur. Specialization: Power Electronics & Drives Advisor: Prof. S P Das Topic: Application of Nonlinear Kalman filters for speed and position sensorless control of Permanent Magnet Synchronous Motor Drives.
    • 2007: Master of Technology in Electrical Engineering from BMS College of Engineering, Bangalore. Specialization: Power Electronics Advisor: Prof. L Venkatesha Project title: Bond graph modeling of power electronic circuits Industrial training @Honeywell Technology Solns. Lab Pvt. Ltd., Bangalore
    • 2005: Bachelor of Engineering in Electrical & Electronics Engineering from UBDT College of Engineering, Davangere. Project title: Effect of pollution on porcelain line insulators Project guide: D Sathyanarayana
    • 2000: Pre-University Education from DRM Science College, Davangere.
    • 1998: Karnataka Secondary Education Examination Board (SSLC) from Lourdes Boys High School, Davangere.
  • Research
    • Sensorless Electric Drives
    • Power Converters
    • Renewable Energy Integration
  • Publications
    • G. R. Gopinath and S. P. Das, "An extended Kalman filter based speed and position estimator for Permanent Magnet Synchronous Motor," 2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), IIT Bombay, pp. 1-5.
    • G. R. Gopinath and S. P. Das, "A Cubature Kalman Filter based speed and position estimator for Permanent Magnet Synchronous Motor," IEEE Symposium on Sensorless Control for Electrical Drives (SLED 2015), Sydney, NSW, 2015, pp. 1-5.
    • G. R. Gopinath and S. P. Das, "Sensorless control of Permanent Magnet Synchronous Motor using Square-root Cubature Kalman Filter," IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), Hefei, China, 2016, pp. 1898-1904.
    • G. R. Gopinath and S. P. Das, "Speed and position sensorless control of Interior Permanent Magnet Synchronous Motor using Square-root Cubature Kalman filter with joint parameter estimation," 2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Trivandrum (India), 2016, pp. 1-5.
  • Experience

    Professional Experience:

    10/2006 to 12/2006: Honeywell Technology Solns. Lab Pvt. Ltd., Bangalore for industrial training

    28/12/2007 to 1/1/2010: IBM India Pvt. Ltd., Bangalore - System Engineer (Software)
    Certified with IBM Bravo award for presenting the best poster "Little Emperor Problem" in the Healthcare Sharenet, Bangalore on 15/9/2008.

    1/4/2017 to Jan 2018: Indian Institute of Technology, Kanpur

    Senior Student Research associate

    • Worked in project: "Design and development of control and protection for hybrid renewable integration". Work carried out as part of the project:
    1. Design and simulation of 3-phase Active front end converter with unity power factor and DC link voltage control.
    2. 3-ph grid integration of solar PV: DSOGI-PLL, control in synchronous DQ domain

    Jan 2010 to Dec 2016: Tutor for the following laboratory courses

    • Introduction to Electrical Engineering
    • Electrical Machines & Energy Conversion
    • Microcontrollers and digital circuits

    Tutor for the following theoretical courses

    • Introduction to Electrical Engineering

    Hardware Experience:

    • Nonlinear Kalman Filter based closed loop speed and position sensorless control of 3-phase VSI fed Permanent Magnet Synchronous Motor (PMSM) using dSpace 1104.
    • Implementation of PMSM sensorless control and estimation algorithms on DSP TMS320F28335.
    • Designing magnetics for power electronic applications.
    • Driver design for MoSFET/IGBT.
    • Voltage and current sensor design.
    • Hands-on experience with PCB assembly & soldering of through-hole and SMD components
    • Real-time simulation of PMSM closed loop control on Cyclone II FPGA.
    • Matrix converter with voltage based commutation, LC filters: Worked on an existing lab prototype fabricated in Static control Lab, IIT Kanpur.
  • Others

    Indian Patent:

    Sensorless Permanent Magnet Synchronous Motor (PMSM) drive with online stator resistance and load torque estimation. Summary of the invention: Adaptive Extended Kalman filter (EKF) based speed and position sensorless control of PMSM is carried out, with joint estimation of load torque and stator resistance. Estimation of load torque is shown to accommodate an increased bandwidth of speed control loop, thereby improving the transient response to step changes in load. A modified speed PI controller is used to decrease the peak overshoot in speed for step changes in reference speed at light loading, and to allow full load starting of the PMSM drive. Estimation of stator resistance improves speed reference tracking, for variation in stator resistance with continuous loading of the machine. The novelty lies in using a simple adaptive technique for EKF, to improve the accuracy of resistance estimation for variable loading of the machine.