Sashidhar Sampathirao

  Associate Professor
  School of Electrical Sciences
  Indian Institute of Technology Goa
  F18, Academic Block-B, IIT Goa
  At GEC Campus, Farmagudi, Ponda, Goa - 403401

Hello! I am an Associate Professor in the School of Electrical Sciences at IIT Goa. My research interests include design and finite-element modelling of electrical machines, motors for renewable energy and electric vehicle applications, permanent magnet motor drives and motors for aircraft and marine applications.

Biography

• Education

  • Doctor of Philosophy (PhD), 2012 - 2017, Department of Electrical Engineering, IIT Bombay, Thesis Title: Investigations on Ferrite Permanent Magnet Motors for Deep Bore-Well Submersible Water Pumps, Supervisor: Prof. B. G. Fernandes
    
  
  

  Experience

  • Associate Professor, School of Electrical Sciences, IIT Goa, November 2023 - till date
    Assistant Professor, School of Electrical Sciences, IIT Goa, July 2018 - November 2023
    Project Research Scientist, Department of Electrical Engineering, IIT Bombay, May 2017- June 2018
    Research Associate, Department of Electrical Engineering, IIT Bombay, December 2016 - May 2017
    Senior Research Assistant, National Centre for Photovoltaic Research and Education (NCPRE), February 2012 - June 2012
    Research Assistant, Andhra University - Naval Science and Technological Laboratory (NSTL), DRDO Joint Project, September 2011 - January 2012
    Teaching Assistant, Department of Electrical Engineering, IIT Bombay, July 2012 - July 2016
    

Teaching

• Courses Taught

  • EE-611 : Modelling and Analysis of Electrical Machines (Autumns '20, '21, '22, '23)   Lecture Slides
    EE-211 : Electrical Machines and Laboratory (Springs '21, '22, '23)   Lecture slides   Demonstration Videos
    EE-610 : Power System Dynamics and Control (Autumns '20, '23)
    EE-615 : Control of Electric Drives (Spring '23)   Lecture Slides
    EE-604 : Modelling and Design of Advanced Electrical Machines (Spring '20)
    EE-656 : Electrical Machine Analysis and Control (Spring '19)
    EE-222/228 : Electrical Machines (Springs '18, '19, '20)
    EE-234 : Electrical Machines Laboratory (Springs '19, '20)   Lab manual
    EE-101 : Introduction to Electrical and Electronic Circuits (Spring '19) (with Dr. Ganga)   Lecture Slides
    EE-100 : Introduction to Profession (Autumns '19, '20, '21, '22, '23)   Lecture Slides
    EE-225 : Network Theory (Spring '18, Autumn '19)
    

Research

• Interests

  • Design and finite-element modelling of electrical machines
    
  • Motors for renewable energy and electric vehicle applications
    
  • Permanent magnet motor drives
    
  • Motors for aircraft and marine applications
    
  
  

  External Projects (as PI)

  
  
  1. "Design and Development of PMM for Roof-top Wind Turbine," R&D grant from National Institute of Wind Energy (NIWE), Chennai. Year and project duration : 2019 / 3 yrs, Grant: Rs. 39,10,800/-
     
  2. "Investigations of Alternative Motor and Converter Topologies for Ceiling Fan," Crompton Greaves Pvt. Ltd., Goa. Grant: Rs. 14,41,960/-
     
  3. "Parameterized Model of Interior PM Synchronous Motor with Power Inverter," RCI Laboratory, DRDO, Hyderabad. Grant: Rs. 13,80,600/-
     
  4. "Evaluation and Expert Opinion for First electric/Hybrid Solar Ferry Boat," River Navigation Department, Govt. of Goa. Grant: Rs. 6,79,000/-
     
  5. "Performance Evaluation of Bore-Well Submersible Induction Motors," KSB International Pvt. Ltd., Nashik. Grant: Rs. 2,20,896/-
     
  6. "Winding Design and Finite Element Analysis for Efficiency Improvement of Induction Motor," M/S. Neeva Aero Solutions Pvt. Ltd., Nellore. Grant: Rs. 1,54,000/-
     
  7. "Efficiency Improvement of Monoset Open-Well Submersible Pumps," M/S. Sri Shanta Pumps Pvt. Ltd., Goa. Grant: Rs. 3,54,000/-
     
  8. "Low Frequency EM Analysis of Customized Nano-Composite based Axial Gap Motors," Naval Science and Technological Laboratory, DRDO, Visakhapatnam. Grant: Rs. 41,35,173/-
     
  9. "Development of Sm-Co Magnet based BLDC Motor for All-Terrain Vehicles," Powerland Agro Tractor Vehicles Pvt. Ltd., Goa. Grant: Rs. 10,62,000/-
  
  

  Patents

  • S. Sashidhar, Silba Mathew and B. G. Fernandes, "Motor System and Winding for an Electric Motor," Indian Patent (Granted), Patent No. 356976.
  • S. Sashidhar and B. G. Fernandes, "Semi-Modular Submersible Brushless dc Motor," Indian Patent (Granted), Patent No. 549887.
  • Chhotu Kumar and S. Sashidhar, "Stator Assembly and Test Setup for Measuring Magnetic Flux of Stator Windings," Indian Patent Application No. 202421026922.
  • Shaqib Khan Warsi and S. Sashidhar, "A Continuously Variable Magnetic Geared Arrangement," Indian Patent Application No. 202421041593.
  
  

  Journal Publications

  1. M. Israyelu and S. Sashidhar, "Novel Transformerless Modified Switched Inductor Topologies with High-Voltage Lift and Reduced Switch Current Stress," IEEE Transactions on Industrial Electronics, vol. PP, no. PP, pp. 1-12, August 2024 (Early access).
  2. M. Israyelu and S. Sashidhar, "State-Space Modelling and Validation of Circuit Parasitics’ Effect on the Performance of a High-Gain Non-Isolated Switched Inductor Topology," IEEE Journal of Emerging and Selected Topics in Industrial Electronics, vol. PP, no. PP, pp. 1-12, April 2024 (Early access).
  3. V. Gowtham and S. Sashidhar, "Rare‐earth‐free Al‐Ni‐Co hybrid PMa‐SyRM for an air‐conditioner compressor," IET Electric Power Applications, vol. 18, no. 6, pp. 656-667, June 2024.
  4. V. Gowtham, A. Nikhitha and S. Sashidhar, "Current Advance Angle based Rare-Earth-Free Hybrid PMa-SyRM Drive using Hall-Sensors for an Air-Conditioner Compressor," IEEE Access, vol. 11, pp. 115924-115933, Oct 2023.
  5. P. Kumar, M. Israyelu and S. Sashidhar, "A Simple Four-Phase Switched Reluctance Motor Drive for Ceiling Fan Applications," IEEE Access, vol. 11, pp. 7021-7030, Jan 2023.
  6. Srinivas Baka, S. Sashidhar and B. G. Fernandes, "Influence of Zero-Sequence Circulating Current on the Performance of Star-Delta Winding Line-Start Ferrite Assisted Synchronous Reluctance Motor," IEEE Transactions on Energy Conversion, vol. 37, no. 3, pp. 1557-1566, Sep 2022.
  7. Nithin Kumar Goona, P.S. Reddy and S. Sashidhar, "Distributed Source Scheme to solve the classical form of Poisson equation using 3-D Finite-Difference Method for improved accuracy and unrestricted source position," Mathematics and Computers in Simulation, Elsevier, vol. 190, pp. 965-975, 2021, ISSN 0378-4754.
  8. Srinivas Baka, S. Sashidhar and B. G. Fernandes, "Design of an Energy Efficient Line-Start Two-Pole Ferrite Assisted Synchronous Reluctance Motor for Water Pumps," IEEE Transactions on Energy Conversion, vol. 36, no. 2, pp. 961-970, June 2021.
  9. S. Sashidhar, V. Guru Prasad and B. G. Fernandes, "A Single-Stage Sensorless Control of a PV based Bore-Well Submersible BLDC Motor," IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 7,no. 2, pp. 1173-1180, June 2019.
  10. S. Sashidhar and B. G. Fernandes, "A Novel Ferrite SMDS Spoke-Type BLDC Motor for PV Borewell Submersible Water Pumps," IEEE Transactions on Industrial Electronics, vol. 64, no. 1, pp. 104-114, Jan 2017.
  11. S. Sashidhar and B. G. Fernandes, "Braking Torque due to Cross-Magnetization in Unsaturated IPM Machines and its Mitigation," IEEE Transactions on Magnetics, vol. 53, no. 1, pp. 1-9, Jan 2017.
  
  

  Conference Publications

  1. Shaqib Khan Warsi and S. Sashidhar, "A Novel Continuously Variable Magnetic Geared Dual Stator Hub-Motor for an E-Bike," in Proc. of IEEE International Magnetics Conference (INTERMAG) - Short Papers, Rio de Janeiro, July 2024, pp. 1-2.
  2. Jitendra Kumar, Dipankar Debnath and S. Sashidhar, "Comparison of Magnet-less and PM Assisted Synchronous Reluctance Motors for Hybrid Electric Vehicle Application," in Proc. of IEEE Power Electronics, Drives and Energy Systems (PEDES) International Conf.(ICEM), Jaipur, Dec 2022, pp. 1-6.
  3. Poonam Sharma and S. Sashidhar, "Permanent Magnet Vernier Generator with Surface Ferrite Magnets for a Direct-Drive Wind Generator," in Proc. of 25th Electrical Machines International Conf.(ICEM), Spain, Sep 2022, pp. 328-333.
  4. M. Israyelu and S. Sashidhar, "Hybrid Switched Inductor Step-Up Ultra-Sparse Matrix Converter for Wind Generator Applications", in Proc. of 47th Annual IEEE Industrial Electronics Society (IECON) Conf., Toronto, 2021, pp. 1-6.
  5. M. Israyelu and S. Sashidhar, "Comparison of Switching Patterns of SVM for a Novel High Gain Indirect Matrix Converter", in Proc. of 47th Annual IEEE Industrial Electronics Society (IECON) Conf., Toronto, 2021, pp. 1-6.
  6. V. Gowtham and S. Sashidhar, "Hybrid Ferrite Al-Ni-Co PM Assisted Synchronous Reluctance Motor for Air-Conditioner Compressors", in Proc. of 47th Annual IEEE Industrial Electronics Society (IECON) Conf., Toronto, 2021, pp. 1-6.
  7. M. Sanjeev, M. Israyelu and S. Sashidhar, "Comparative Analysis of Direct SVM and Indirect SVM Techniques for Direct Matrix Converter", in Proc. of International Symposium of Asian Control Association on Intelligent Robotics and Industrial Automation (IRIA), Goa, 2021, pp. 95-100.
  8. Nithin Kumar Goona, P.S. Reddy and S. Sashidhar, "A Proposal for Switched Magnetization Superconductor Motor", in Proc. of IEEE 14th Workshop on Low Temperature Electronics (WOLTE), Matera, 2021, pp. 1-4.
  9. V. Gowtham and S. Sashidhar, "Comparison of Hybrid PM assisted Synchronous Reluctance Motors", in Proc. of 22nd IEEE International Conference on Industrial Technology (ICIT), Valencia, 2021, pp. 166-171.
  10. Jitendra Kumar, V. Gowtham and S. Sashidhar, "Comparison of Synchronous Reluctance, PM assisted Synchronous Reluctance and Spoke-Type BLDC Motor for an E-Rickshaw", in Proc. of 22nd IEEE International Conference on Industrial Technology (ICIT), Valencia, 2021, pp. 172-177.
  11. Anupam Sharma and S. Sashidhar, "A Novel Ring Permanent Magnet Flux Reversal Machine for a Direct-Drive Wind Generator", in Proc. of 46th Annual Conference of the IEEE Industrial Electronics Society (IECON), Singapore, 2020, pp. 838-843.
  12. Anupam Sharma and S. Sashidhar, "Comparison of Wind Turbine Generators for Roof-top Wind Power: Case Study, Issues and Challenges", in Proc. of 33rd IEEE Region 10 International Conference TENCON 2019, Kochi, 2019, pp. 1-6.
  13. Nithin Kumar Goona, P.S. Reddy and S. Sashidhar, "Effect of Magnetisation of Bulk Superconductors on Permanent Magnets for Reversible Braking Applications", in Proc. of 11th International Workshop on Processing and Applications of Superconducting (RE)BCO Materials (PASREG 2019), Prague, 2019, pp. 1-6.
  14. S. Sashidhar, Silba Mathew and B. G. Fernandes, "Novel Toroidal Winding for Efficiency improvement of a Line-Start Induction Motor," in Proc. of 44th Annual IEEE Industrial Electronics Society IECON Conf., Washington D.C., Dec 2018, pp 607-612.
  15. Srinivas Baka, S. Sashidhar and B. G. Fernandes, "Design and Optimization of a 2-Pole Line-Start Ferrite assisted Synchronous Reluctance Motor for a Downhole Pump," in Proc. of 23rd Electrical Machines International Conf.(ICEM), Greece, Oct 2018, pp. 131-137.
  16. Srinivas Baka, S. Sashidhar and B. G. Fernandes, "Multi-Barrier Two-Pole Line-Start Synchronous Reluctance Motor with High Saliency for a Bore-Well Submersible Pump," in Proc. of 19 th Annual IEEE-IES Industrial Technology International Conf., Lyon, Mar 2018, pp. 475-480.
  17. Srinivas Baka, S. Sashidhar and B. G. Fernandes, "Effect of Flux Barrier Shape on the Performance of a Two-Pole Line-Start Synchronous Reluctance Motor," in Proc. of IEEE Power Electronics, Drives and Energy Systems (PEDES) International Conf., Chennai, Dec 2018, pp. 1-6.
  18. S. Sashidhar and B. G. Fernandes, "Comparison of a ferrite based single, three-phase spoke and surface permanent magnet BLDC motor for a PV submersible water pump," in Proc. of 16th Annual IEEE-IES Industrial Technology International Conf., Seville, Mar 2015, pp. 671-676.
  19. S. Sashidhar and B. G. Fernandes, "Optimal Design of Photovoltaic based Submersible Permanent Magnet BLDC Motor Using FEM," in Proc. of 41st Annual IEEE Industrial Electronics Society IECON Conf., Yokohama, Nov 2015,pp. 5241-5246.
  20. S. Sashidhar and B. G. Fernandes,"A Low-Cost Semi-Modular Dual-Stack PM BLDC Motor for a PV based Bore-well Submersible Pump," in Proc. of 21st Electrical Machines International Conf., Berlin, Sept 2014, pp. 24-30.
  21. S. Sashidhar and B. G. Fernandes, "A Multi-physics Approach for the Design of Bore-well Submersible Spoke-Type BLDC Motor," in Proc. of 40th Annual IEEE Industrial Electronics Society IECON Conf., Dallas, Oct 2014, pp. 330-336.
  22. S. Sashidhar and P. Mallikarjuna Rao, "An ER-Diagram based classification for CAD of brushless PM Motor design parameters," in Proc. of National Conference on Contemporary Control, Visakhapatnam, May 2012, pp. 14-18.

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  Students

  • Post-Doctoral Scholars

    1. Dr. M. Israyelu (Research Associate-I (through project), September 2024 onwards)
       
    
    

    PhD (Graduated)

    1. Gowtham Vegireddy, 19242105
       
    2. Israyelu Maraka, 19242203
       
    3. Lavanya Chandra Mava, 19242202 (ongoing)
    4. Basam Venkata Rao, 20242204 (ongoing)
    5. Neel Shrivastava, 22242101 (ongoing)
    
    

    MTech (Graduated)

    1. Jitendra Kumar, 1914203
    2. Sanjeev Kumar M, 1914207
    3. Prince Kumar, 2014208
    4. Poonam Sharma, 2014211
    5. Nikhitha Addagatla, 2114201
    6. Nikhil Sengwa, 2114208
    7. Sai Priya Chelluboyina, 2214209
    8. Chhotu Kumar, 2214202 (as co-supervisor)
    9. Akriti Sonkar, 2214201
    
    

    Research Fellow

    1. Gopi Kamepalli (Junior Research Fellow (through project), August 2024 onwards)
    
    

    BTech (Graduated)

    1. Ansh Rajdev, 160020019
       
    2. Anish Kumar, 160020018
       
    3. Sajal Yadav, 160020013
       
    4. Chiluveru Krishna, 170020027
       
    5. Uday Singh Meena, 170020014
       
    6. Aaryan Kadam, 180020001
       

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  Recognition and Awards

  • Best Technical Presentation Recognition from IEEE Industrial Electronics Society, IECON 2014, Dallas, USA.
    IES Student Travel Grant, IEEE Industrial Electronics Society, IECON 2014, Dallas, USA.
    

  Events

  • LaTeX for Beginners with Dr. Nandakumar Nambath on 17th August, 2018.