ABOUT ME

A committed, comprehensive and competent researcher with five years of research experience in electrical engineering at the graduate-level with publications in IEEE, IET, and other SCI-indexed journals with related experience in Z-source inverters for grid-connected PV applications. A confident presenter at conferences and teacher in the classroom, able to explain complex information to audiences of all levels.  Strong background in circuit design for high frequency power electronics application and hands on experience in induction motor controller FOC control design and validation for automotive applications.

Time line

EDUCATION

2016-2021 National Institute of Technology Karnataka (NITK), Surathkal, India
Doctoral Degree (PhD in Power Electronics and Control) [CGPA: 8.72]

2012-2014 Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal, Andhra Pradesh, India M.Tech (Power Electronics) [Percentage: 83.2%]

2007-2011 Kuppam Engineering College, Kuppam, Andhra Pradesh, India B.Tech. (Electrical and Electronics Engineering) [Percentage: 73.8%]
2005-2007 State Board of Intermediate Education, Andhra Pradesh, India 10+2 (Maths-Physics-Chemistry) [Percentage: 84.2%]
2000-2005 Board of Secondary Education, Andhra Pradesh, India
SSC [Percentage: 68.9%]


Career Highlights and Awards

  • Received best presenter award for the research article presented in IEEE DISCOVER conference at MIT, Manipal
    from 11-12, 2019.
  • Received the registration fee waiver for the conference article presented at IEEE APPEEC2017.
  • Three times Graduate Aptitude Test in Engineering (GATE) qualified in 2012, 2013, and 2014 respectively with best all India rank of 4457.
  • Received MHRD scholarship during M. Tech (2012) and PhD (2016)
  • Received Institute Gold Medal from Mr. N. Chandrababu Naidu as a department topper in KEC at UG Level.

OTHER Activities

  • Succeed in web designing and admin of website named EEENOTES2U for motivating electrical students towards GATE, Software, and Govt. Sector Exams with the help of E-Notes and PPT’s. (CLICK HERE TO VIEW)
  • Admin of website SCIENCE SIMULATIONS WORLD, as a goal as made online labs for Physics, chemistry, mathematics, and brain-teasing games with HTML and JAVA codes.
  • Maintaining one blogger SPOTTURNS, four websites EEENOTES2U, SCIENCE SIMULATIONS WORLD, ELECTRICALPROJECTS4U, YOUNG INDIA to provide technical awareness to peoples, and approved by Google AdSense. 
  • Organizer and Admin of NGO named YESTNP (Youth Educational Society of Thellaneellapalli) to help the poor children in nearby villages, and it is successfully going on Towards Growth. (CLICK HERE TO VIEW)

TECHNICAL EXPERTISE

  • 5+ years of experience working with Control Systems Applications in Power Electronics Group in National Institute of Technology, Karnataka.
  • 1+ years of hands-on experience on Model Based Development, QM standard C code generation and code optimisation using Embedded Coder-MATLAB for automotive grade motor controller applications.
  • Knowledge on main code integration with the BSW software for motor controller applications.
  • 1+ years of hands-on experience on hardware schematic design-10kW 72V traction inverter, cost effective component selection, BOM creation, component procurement, and board bring up process.
  • Experience in SMPS/Switched-mode power supply designs, Gate Driver Design, Coupled Inductor Design, and IGBT selection for applications ranging from 100V to 1200V.
  • Experience in hardware development for automotive applications which includes requirement analysis, circuit design, worst-case analysis and simulation.
  • Experience on customer and R&D supported GUI development and data logging for traction motor controller using CAN protocol on Vehicle Spy software.
  • Well versed with MATLAB/Simulink, PLECS, PSIM, PSCAD, Orcad, Mathcad, and Lab view tools.
  • Have experience in various tests like MIL, SIL, and HIL validations in the process of prototype building, and also involved in drive cycle testing of prototype hardware.
  • Awareness of MAAB, ISO26262, and MISRA C guidelines.
  • Simulation Tools: MATLAB/Simulink, PLECS, PSIM, PSCAD, Orcad, KiCad, and LabView.
  • Programming Languages: C, Embedded C, Verilog, and VHDL.
  • Flashing tool: Winidea, GHS Multi, Renesas Flash Programmer, Keil µVision3.
  • Debugging: Winidea and eclipse for Renesas RH850 Series (F1k,F1h,F1KM,F1KH), Matlab, Quartus-II, Xilinx ISE for Altera FPGA controller.
  • GUI tools: Vspy using HSCAN, and Matlab GUI.
  • Hardware platforms: Altera Cyclone-IV FPGA, MyRio, STM32 microcontroller, Renesas RH850 P1M microcontroller, Basys2 Board, and Arduino- ATmega328P.
  • Hardware-in loop platforms: DSpace, Opal-RT, and Typhoon HIL.
  • Hardware equipment handled: Solar Array Simulator, Programmable DC source, Programmable AC/DC Load, 4-channel isolated/non-isolated DSOs, LCR meter, Frequency Response Analyzer, Thermal Camera Fluke, Power Analyzer, and Cube servo-2 Robotic Arm.

CAREER GROWTH & EXPERIENCE

Senior Engineer-Motor controls Development (Systems and Controls Development team, PDS)

BorgWarner Technical Center of India, Bangalore, India. (Click Here)

August’29, 2022 – Present

Responsibilities:

  • Motor thermal estimations and torque compensation design



Senior Engineer-MBD/ HW Developer (Advanced Engineering Team)

Hella India Automotive Pvt. Ltd., Pune, India. (Click Here)

September’6, 2021 – August’25, 2022

Project#1 Description: 72V 10kW field oriented control (FOC) of induction motor prototype building for automotive grade applications.

Environment: MATLAB, Simulink, Simscape, Eclipse, Winidea, GHS Multi, Renesas Flash Programmer, Cadence, Mathcad, PLECS, DSpace, Vehicle Spy, RH850.

Controller: RH850P1M, Compiler: Green_Hills, Debugger: IC5000(Winidea)

Responsibilities:

  • Motor parameter estimation, modelling and development of control architecture, sensor scaling, PI tuning in Matlab/Simulink environment using MCB tools.
  • Misra compatible C-code development using Embedded Coder tool, and code integrating with BSW.
  • Performing MIL, SIL (Renesas RH850P1M), HIL (Dspace) testing’s for the developed control code.
  • Customer and R&D supported GUI development using Vehicle Spy software.
  • Customer requirement analysis, inverter/controller design, worst-case analysis and simulation based on customer requirements.
  • MOSFET/IGBT power loss and reliability estimations to select cost effective switching device for traction inverter.
  • Schematic circuit design and BOM creation of 10kW traction inverter with detailed EMI/EMC instructions to layout team.
  • Component procurement and board bring-up, functional testing on hardware prototype inverter and controller.
  • Performing static heat sink withstanding test and dynamic drive cycle test on designed prototype inverter according to customer requirements.

Appreciations Received: Pat on the back for demonstrating ownership of appreciation sample development of new customer for 10 kW AC induction motor.

Project#2 Description: 48V 3kW BLDC motor LMPC prototype development for automotive grade applications.

  • Roles: HW and HIL validation Engineer.
  • Responsibilities:
  • Design test cases for HIL and bench level testing on Dyno in torque, Speed, road law functional modes.
  • Handling the traction inverter HW prototype throughout project.


Research Fellow- (SERB Project)

NITK, Surathkal, India. (Click Here)

July’15, 2017 – Dec’27, 2020

Project Description: Adaptive MPPT of Grid-tied Photovoltaic System using Magnetically Coupled Impedance Source Inverters.

Environment: MATLAB, Simulink, PLECS, Typhoon HiL, Quartus-II, KiCad.

Responsibilities: Design and development of step-up DC-AC inverters for grid-connected PV inverters, building the prototype HW for validations, procurement of required equipment and their installations, yearly financial track of the sanctioned budget, working with project staff to meet the project objectives, papers/patents communication.


April 2015 to July 2016   Sri Venkateshwara College of Engineering, Bengaluru.

Designation: Assistant Professor (only Under Graduates )  (Click here to see)

Subjects Handled: Power electronics, network analysis, industrial drives and applications, power system analysis, and stability.

Laboratories Handled: Power electronics lab, microcontroller lab, analog electronics lab, measurements, andinstrumentation Lab.

Other roles:

  • R&D coordinator from EEE Dept., Handling one Project in Solar Inverter in SVCE Rooftop.
  • My research article ‘Unexplained ancient achievements-anti gravity: an ideology desirable to stent hen the modern
    technology’’ is selected and appeared in college magazine AURORA-2K16.
  • Website designer and promoter of National Conference NCRDPE-15, FDP RIETPE-16.
  • Develop discipline plans and work closely with at-risk students.
  • Identify and organize field trips to enhance the curriculum.


RESEARCH EXPERIENCE

1. Patents: 01 (Indian Patent)

  • Application Number: 202041047968 and Title:  Scalable Single-Stage Single-Phase Differential Flipped Gamma Semi Magnetically Coupled Impedance Source Inverter (Status: 1st FER report submitted)

2. Publications: International Journals: 12, International Conferences: 8, National Conferences: 4 

International Journals:

  1. Reddivari, R., & Jena, D. (2022). Improved Gamma Type Y-Source Inverter for Rooftop PV Based V-G Applications. International Journal of on Electrical Power & Energy Systems, 1-15. (Elsevier: SCIE Indexed )
  2. Reddivari, R., & Jena, D. (2021). A Low Voltage Harvesting in Photovoltaic Generation Systems using Negative Embedded Z-source Inverter. International Transactions on Electrical Energy Systems, 1-22, e13018. (Wiley: SCIE Indexed )
  3. Reddivari, R., & Jena, D . A Correlative Investigation of Impedance Source Networks: A Comprehensive Review. IETE Technical Review, 1-34. (IETE Technical Review.: SCIE Indexed )
  4. Reddivari, R., Jena, D., & Goutham T.N. (2020). Analysis, Design, and Performance Evaluation of Differential Mode Y-Source Converters for Voltage Spikes Mitigation. IEEE Transactions on Industrial Applications, 56(6), 6701-6710. (IEEE Trans.: SCI Indexed )
  5. Reddivari, R., & Jena, D. (2020). Analysis of RCD Snubber Based Non-Ideal Z-source Inverter Using Average Modelling Approaches. International Journal of Electronics, 107(5), pp. 755-777. (Taylor & Francis: SCI Indexed )
  6. Reddivari, R., & Jena, D. (2019). A Negative Embedded Differential Mode Γ-Source Inverter with Reduced Switching Spikes. IEEE Transactions on Circuits and Systems II: Express Briefs, 67(10), pp.2009-2013. (IEEE Trans.: SCI Indexed )
  7. Reddivari, R., & Jena, D. (2019). Novel active clamped Y-source network for improved voltage boosting. IET Power Electronics, 12(8), 2005-2014. (IET: SCIE Indexed )
  8. Kumar, K. V., Reddivari, R., & Jena, D. (2019). A Comparative Study of Different Capacitor Voltage Control Design Strategies for Z-Source Inverter. IETE Journal of Research, 1-11. (Taylor & Francis: SCIE Indexed )
  9. Reddivari, R., & Jena, D. (2018). A critical analysis of Z-source converters considering the effects of internal resistances. International Journal of Electronics, 105(10), 1785-1803. (Taylor & Francis: SCI Indexed )
  10. Goutham T.N., Reddivari, R., Jena, D. (2021). A Cost-Effective Single-Phase Semi Flipped Gamma Type Magnetically Coupled Impedance Source Inverters. International Journal of Circuit Theory and Applications, 47(4), pp. 1078-1102. (Wiley: SCI Indexed )
  11. Reddivari, R. P., & Nandyal, K. S. (2014). Comparative analysis of magnetically coupled Z-source inverters. International Journal of Engineering Research, 3(7), 2278-0181. (CLICK HERE VIEW)
  12. C., Reddy, L. Sagar, & Reddivari, R.P. (2015). A Simulation overview of magnetically coupled Z-source inverters. International Journal of Advanced Research in Electrical and Electronics and Instrumentation Engineering (IJAREEIE), 4(8), 7286-7296.

International Conferences:

  1. Sitara, K., Josh, P., Reddivari, R., &Jena, D. (2020). Component Level Reliability Evaluation of Boost Converter, Z-Source, and Improved Gamma Type Y-Source Inverters. In 2020 IEEE PES POWERCON, Bangalore. (pp. 1-6). IEEE
  2. Goutham, T. N., Reddivari, R., &Jena, D. (2019, October). Design Implementation of High Boost Embedded Semi Quasi-ZSI for Photovoltaic System Applications. In 2019 IEEE Global Conference for Advancement in Technology (GCAT) (pp. 1-6). IEEE.
  3. Gowrishankar, K., Jena, D., & Reddivari, R. (2019, August). Comparative Overview of Proportional-Integral, State Feedback Integral, and Sliding Mode Controllers for Buck Converter. In 2019 IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits and Robotics (DISCOVER) (pp. 1-6). IEEE.
  4. Reddivari, R., Jena, D., & Goutham, T. N. (2018, December). Differential Mode Y-Source DC-DC Converter for Better Performance with Loosely Coupled Inductors. In 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) (pp. 1-6). IEEE.
  5. Reddivari, R., & Jena, D. (2018, January). A detailed model of Z-source converter considering parasitic parameters. In 2018 International Conference on Power, Instrumentation, Control and Computing (PICC) (pp. 1-6). IEEE.
  6. Reddivari, R., & Jena, D. (2018, January). Practical limitations of embedded Z-source DC-DC converters in PV applications. In 2018 International Conference on Power, Instrumentation, Control and Computing (PICC) (pp. 1-6). IEEE.
  7. Reddivari, R., & Jena, D. (2017, November). Differential mode gamma source inverter with reduced switching stresses. In 2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC) (pp. 1-6). IEEE.
  8. Reddivari, R., Pruthviraj, B. G., Bharat, M., & GB, A. K. (2016, January). Modified gamma source inverter for fuel cell-battery hybrid electric vehicles. In 2016 Biennial International Conference on Power and Energy Systems: Towards Sustainable Energy (PESTSE) (pp. 1-6). IEEE.

National Conferences:

  1. “Ground Leakage current reduction methodology in transformer-less grid connected converters for solar power plants”, is presented in National Conference on Recent Developments in Power Engineering (NCRDPE-15), SVCE, Bengaluru, proc.pg:112-120.
  2. “Power Quality Improvements in Induction Generator Based Wind Power Systems”, is presented in National Conference on Recent Developments in Power Engineering (NCRDPE-15), SVCE, Bengaluru, proc.pg:57-63.
  3. “A Control Technique for Grid Connected Renewable Energy System for Power Quality Improvement with Battery Storage System”, is presented in National Conference on Recent Developments in Power Engineering (NCRDPE-15), SVCE, Bengaluru, proc.pg:219-228.
  4. “DC to DC converters with multi phasing techniques”, is presented in National Conference on Recent Developments in Power Engineering (NCRDPE-15), SVCE, Bengaluru, proc.pg:203-206.

3. Affiliations to Professional Organizations:

  • IEEE Student Member from the year of 2017- 2021.
  • IEEE Industry Applications Society Member from the year of 2019- 2021.
  • IEEE Power Electronics Society Member from the year of 2019- 2021.
  • IEEE Power & Energy Society Member in the year 2018.
  • Member of International Association of Engineers (IAENG) in Industrial, Electrical Engineering Societies from the year of 2014- current.

WORKSHOPS& SEMINARS

1. Technical Talks Delivered:

  • Demonstrated Lab session using MATLAB on Sliding mode control and its applications to wind turbine in short term GAIN course on Design and analysis of offshore floating wind turbine held during 3-7 September 2019 at NITK, Surathkal. Click here
  • Delivered a lecture on Department Level Hands-on Workshop on MATLAB/Simulink for Engineering Applications organized by EEE Department, SVCE Bangalore, during 11-13 February 2016. Click here
  • Delivered a lecture in one-day online workshop on Applications of Mathematics in Engineering and Sciences organized by H&S Department, AITS Anatapur, during 23rd May 2020.

2. Faculty Development Programs:

  • Participated in Five days Faculty Development Programme on Advances in HVAC, HVDC & FACTS Controllers organized by Department of EEE, MSRIT, Bengaluru during 13th to 17th July 2015.
  • Participated in Five days Faculty Development Programme on Recent Issues and Emerging Trends in Power Engineering organized by Department of EEE, SVCE, Bengaluru from 21st and 22nd January 2016.

3. Workshops/Technical Talks Attended:

  • Participated in one week short-term course on Power Electronic Converters and Drives: Fundamentals, Implementation and Applications organized by EEE Department, SVNIT Surath from 03-07, October-2020.
  • Participated in Five days short-term course on Real-time simulation of electrical systems organized by EEE Department, NITK from 14-18, November-2018.
  • Participated in TEQIP-III Sponsored 5-Days workshop on Recent Trends in Power Systems Operation and Control organized by EEE Department, NITK, during 11-15 June 2018.
  • Participated in Sun grow Solar Technical Training for Mission Clean Power for All organized by of EEE, NITK, Surathkal.
  • Participated in two days’ workshop on Mi-Power Software for Simulation of Electrical Systems conducted by Kuppam Engineering College during 12&13 Aug 2013.
  • Participated in “National level symposium” in Project-Expo and Poster Design events on 20th March 2010 in KEC, Kuppam.

4. Volunteered Experience:

  • Volunteered in the IEEE 1st International Conference on Power Electronics Applications and Technology in Present Energy Scenario (PETPES 2019), held at Dept. of E&EE, NITK during 29-31, August-2019.
  • Volunteered in the National Conference in Recent Developments in Power Engineering (NCRDPE-15) organized by Dept. of E&EE, SVCE, Bengaluru on August 5th

    ACADEMIC PROJECTS

    M.Tech- “Closed loop control of Hybrid Gamma source inverter fed induction motor” –MATLAB7.

    Description: The increase in petroleum and diesel product prices in country seeks an alternative energies that drives an vehicle. As part of it, this project proposes a hybrid magnetically coupled Z-source inverter with voltage boosting and inverting ability  for electrical vehicular application. This project also ensures motor maximum efficiency condition (constant losses=variable losses), Fuel cell, battery SOC (state of charge) MPPT condition conditions by controlling load current.

    B.Tech- “Low cost wireless sensor network for in field operation of induction motor using ZIGBEE” –MATLAB7,EMBEDDED C, 8051 MC.

    Description: The single-phase motors are simple in construction, cheap in cost, reliable and easy to repair and maintain. Due to all these advantages, the single phase motor finds its application in vacuum cleaners, fans, washing machines, centrifugal pumps, blowers, washing machines, etc. This project designed a low cost model of single-phase ac-ac converter with reduced switch count. The remote monitoring and control of these motors are essential in modern days as part of home automation. This project develops a two control panels (one at motor end in remote field, and other one at end user side that is connected to PC) to control the speed of induction motor and monitor the same. The 8051 microcontroller is used as a controller, and to sense the speed and to feed the PWM pulses, a  Zigbee cards of two numbers are used to convey bi-directional control signals. 

    OTHER PROJECT HANDLED

    Project #1: Comparative analysis of magnetically coupled Z-source inverters

    Environment: Windows XP, Windows 7

    Technology: Matlab/Simulink (7.9b)

    Role: Team leader

    Duration: From Aug 2011 - Oct 2011

    Brief description of the project: This project is mainly designed high-efficiency boost inverters with reduced stresses which lead to the reduction of cost and size of overall converters. Here this work deals invention of different converters topologies called magnetically coupled Z-source inverters and verification of results with thehelp of MATLAB modeling.

    Project #2: Application of negative DC bus embedded type Z-source inverters in hybrid electrical vehicles Environment: Windows XP, Windows 7.

    Technology: Matlab/Simulink (7.9b)

    Simulation Package: User defined functions (S-function, S-functionbuilder, Level 2 -file S-function, Embedded mat lab function), Sim power, Matlab GUI

    Role: Team Leader

    Duration: Nov 2011-Jan 2012

    Brief description of the project: The electric drive systems used in electric vehicles which require higher performance, reliability, variable speed due to its ease of controllability and high efficiency and regenerates energy at the time of breaking. Recent days all hybrid vehicles are showing interest towards induction motor due excellent controlling by SVPWM method and rugged in construction. The speed control of 3-phase induction motor very crucial in hybrid vehicular applications because inputs sources battery about 12-15 volts &fuel cell about 20-50 volts that to DC. But, the output motor requires 3-phase ac 415 volts .here project needs powerful converter which converts dc-ac and also boost. So, this project designs negative embedded type Z-source inverter in the place of vehicular applications in MATLAB platform, and designs PWM for controls induction motor.

    Project #3: Modified configuration of Gamma (Γ)-Source inverter for Fuel Cell Hybrid electric Vehicle Environment: Windows XP, Windows 7.

    Technology: Matlab (2012a/7.12a)

    Simulation Package: User defined functions (S-function, S-function builder, Level 2 -file S-function, Embedded Matlab function), Matlab GUI

    Role: Team Leader

    Duration: Feb 2012-July 2012

    Brief description of the project: This project aims the cost reduction scheme in hybrid vehicles by introducing spilt power mode of operation. And the Z-source inverter re designed such a way that the battery requirement to the hybrid vehicles was low. The complete work is carried out by Simulink platform. Hybrid vehicle runs by taking power from fuel cells and also battery. Split power operation decides input source for induction motor load.

    Project #4: Ground Leakage current reduction techniques for PV cell- Grid connected systems (real time)

    Environment: Windows XP, Windows 7.

    Technology:Matlab (2012a/7.12a), D-Space.

    Simulation Package:User defined functions (S-function, S-function builder, Level 2 -file S-function, Embedded Matlab function), Matlab GUI

    Role: coordinator

    Duration: Sept 2015-June 2016

    Brief description of the project: This project aims the cost reduction scheme in PV cell- Grid connection converters. The designing of converters for 40KW PV-cell to 3-phase Grid integration. This projects majorly working on real time problems facing in grid integration, right solutions in form of right inverters with suitable gate pulses.

    CONTACT ME

    • Dr.Reddiprasad Reddivari,
    • reddytnp.244@gmail.com
    • 9494747497

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