Raghu Selvaraj

Scientist at CSIR-Central Mechanical Engineering Research Institute (CMERI)
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Contact Information
us****@****om
(386) 825-5501
Location
Durgapur, West Bengal, India, IN
Languages
  • Telugu Elementary proficiency
  • Tamil Full professional proficiency
  • English Full professional proficiency
  • Hindi Elementary proficiency

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Phaniraj Tarakaram Nori

Getting an opportunity to be guided by Raghu sir during my graduation turned out to be invaluable for me. His depth of knowledge, practical exposure towards topics, especially Power Electronics; made him one of the top runners among his peers to deserve a research fellowship at a prestigious institute like IIT Roorkee. Following his passion for the subject and finishing his Ph. D at such a competitive institution talks volumes about his knowledge and commitment. His management of taking classes while carrying out research activities at SRM is a commendable display of his sincerity. Mr. Raghu would be an asset to any organization he works for and I am sure he will give his best at every assignment he is a part of.

Anto Joseph

From my experience, Mr. Raghu is a responsible scholar. He has demonstrated excellent expertise in power electronics and electrical machine drives, and also knowledge in renewable energy source based distributed power systems. Academically, he has strong fundamental and theoretical understanding which serve him very well in guiding graduate students or conversation with fellow researchers. In terms of research, he has an aptitude in asynchronous machine drive system, grid connected power converter systems, energy storage systems management and his proficiency is very recognizable. He is able to treat every technical problem with open heart and think critically. Mr. Raghu has a very pleasant personality, friendly and courteous. he is a good team player. I am sure that he will become a rising star in power electronics both nationally and internationally.

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Experience

    • Scientist
      • Oct 2021 - Present

    • India
    • Motor Vehicle Manufacturing
    • 1 - 100 Employee
    • Power Electronics Design Enginner
      • Aug 2021 - Sep 2021

    • Higher Education
    • 700 & Above Employee
    • Senior Research Fellow
      • Jul 2018 - Jul 2021

      As a senior research fellow in power electronics and hydro-electric machine research group at Indian Institute of Technology, Roorkee. I had developed the following hardware prototype and control algorithm for variable speed pumped storage power plants.***Developed an entire simulation model of 250 MW DFIM with five parallel connected three-level neutral point clamped back-to-back power converter (GE MV7311) in MATLAB Simulink tool in collaboration with research and development team (R&D) of Tehri Hydro Development Corporation India Limited (THDC).***As a part of research work, dynamic performance of DFIM unit under ancillary services is tested for aforementioned system.***DC link chopper and crowbar protection circuit operation strategy is implemented and tested for aforementioned system during grid disturbances.***Designed and developed leg-level redundancy circuit for 3L-NPC power converter with control re-configuration algorithm to enable fault tolerant operation for aforementioned system in open/short switch fault condition.***Seamless fault tolerant control re-configuration algorithm is designed with N-1 power converter redundancy for 250 MW DFIM to enable continuous operation. ***A detailed study on thermal behavior of power semiconductor devices is tested in PLECS environment for aforementioned system during different operating conditions (pump/generator/condenser). Show less

    • Junior Research Fellow
      • Jul 2016 - Jul 2018

      As a junior research fellow worked on reduction of switching transients in doubly fed induction machine used for large rated pump storage plants it is financially supported by Central Power Research Institute, Bangalore, India (CPR-949-WRC).***Performed switching transient analysis on 250 MW DFIM unit in pumping mode of operation and identifying root cause failure of drive.***Studied and implemented V/f smooth starting and braking procedure for 250 MW DFIM unit.***Developed a locked rotor starting scheme to reduce circuit breaker switching transient during pumping mode of operation.***Prepared technical documents/reports (calculations/simulation) for funding agency review. This role also includes preparing technical test documents for doing different starting tests on DFIM to validate performance of drive train as per standards by Tehri Hydro research and development team (R&D). Show less

    • India
    • Education Management
    • 400 - 500 Employee
    • Assistant Professor
      • Jun 2014 - Jun 2016

      ***Developed 2kW three phase three level Neutral point diode clamped (NPC)-MLI with SVPWM drivers for solving neutral point drift problem in full range of modulation etc., ***Fabricated 2kW three phase 3L-NPC power converter using FGA25N120ANTD devices, and gained comprehensive design knowledge on IR2130, IR2110 based gate drive design with cross conduction protection and high-power snubber design. ***Investigated various modulation strategies for common mode voltage reduction/elimination in 3L-NPC power converter fed induction motor drive. ***Gained working knowledge with various processors like FPGA SPARTEN III, ARUDINO UNO, DUO, ARM CORTEX LPC1732, and dSPACE DS1104. ***Designed SPWM technique in STM 32 microcontroller using Waijung’14 tool in MATLAB & Simulink Environment. ***Project Entitled “Bidirectional inductive wireless power transfer system for electric vehicle charging” sponsored by SRM Institute of Science and Technology (formerly known as SRM University) under the Selective Excellence research program (Rs.2,50,000) in academic year 2016. Contract research/projects and collaboration/co-operative research ***Mahindra innovation challenge “low cost 1kV solar based micro inverter deign” (simulation and case study level) Show less

    • TEACHING FACULTY
      • Dec 2013 - May 2014

      ***Designed and fabricated 3-phase open IGBT card for multipurpose operation in Altium designer 13.1 ***Designed different DC-DC converters in PSIM 6.0. ***Designed inverter and converter with different PWM techniques and implemented grid integrated PV array in MATLAB Simulink tool. ***Designed and fabricated 3-phase open IGBT card for multipurpose operation in Altium designer 13.1 ***Designed different DC-DC converters in PSIM 6.0. ***Designed inverter and converter with different PWM techniques and implemented grid integrated PV array in MATLAB Simulink tool.

    • ASSISTANT PROFESSOR
      • Jun 2012 - Dec 2013

      Drives Lab ***Studied interfacing of dSPACE (DS1104) co-simulation for Power Electronics converters. ***Designed SPWM, PD, POD, APOD for Arduino UNO in MATLAB Simulink Environment using Arduino hardware support package. ***Understand the effects of PWM waveforms on motor. Drives Lab ***Studied interfacing of dSPACE (DS1104) co-simulation for Power Electronics converters. ***Designed SPWM, PD, POD, APOD for Arduino UNO in MATLAB Simulink Environment using Arduino hardware support package. ***Understand the effects of PWM waveforms on motor.

Education

  • Indian Institute of Technology, Roorkee
    Doctor of Philosophy - PhD, Power Electronics and Hydro-Electric Machines
    2016 - 2022
  • SRM UNIVERSITY
    Master of Technology (M.Tech.), POWER ELECTRONICS AND DRIVES
    2010 - 2012
  • NANDHA ENGINEERING COLLEGE
    B.E, Electrical and Electronics Engineering
    2006 - 2010

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