Rajendra Kumar +91 76638 85045/ +91 97272 54461
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[email protected] Rajendra Kumar +91 76638 85045/ +91 97272 54461 E Mobility Lab, IIT Guwahati, India PhD Scholar www.iitg.ac.in/e_mobility/team#rajendra DEGREE SPECIALIZATION INSTITUTION/BOARD CGPA/PERCENTAGE 7.00 (CGPA) PhD Electrical Machines & IIT Guwahati (July 2015-present) Drives (course-work) Education M.Tech Nuclear Engineering IIT Kanpur 6.75 (CGPA) (Dec.2007-Jan. 2010) and technology SBCET, University of B.Tech Electrical Engineering 62.11 (2002-2007) Rajasthan Softwares: • Electromagnetic design and simulation (Ansys Maxwell) • MATLAB Simulink with a real-time microcontroller interface • PCB Design: Design Spark and Eagle • Math analysis software: MATLAB, Maple, Excel. Professsional • Programming Language: C, C++, Microsoft VBA, Python Skills • Embedded programming: Arduino, D-Space. • Documentation: Latex and Microsoft tools Hardware: Prototype development, familiar with hand soldering (for SMD & through-hole components), sensor interface and gate driver circuits design, three-phase inverter, power supply for gate driver circuit. 1. Research Fellow and Teaching Assistant Dec 2015 – July 2021 Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati Work Profile: • Electromagnetic design of energy efficient motors for projects undertaken at e-mobility lab. • Assessment, modeling and minimization of various magnetic loss-components of a motor. • Prototyping and testing of motor as per the international standards. • Performance analysis of electric vehicle motors through Hardware-in-the-Loop. Professional Experience 2. Marwadi University, Rajkot Jan 2012 – Dec 2015 Assistant Professor, Faculties of PG studies and Research in Engineering and Technology, Department of Electrical Engineering. 3. P.M. Dimensions (P) Ltd. Gandhinagar April 2010 – Jan 2012 Assistant Project Manager. • Worked with a team of experts for commissioning of various electrical systems of 500MW prototype fast breeder reactor at Kalpakkam under BHAVINI; • Delivery of procedures and flow sheets as per Nuclear Power Plant standards. 4. IIT Guwahati) Teaching Assistant • EE-102: Basic Electronics Laboratory, Spring 2016, 2020. • EE-381: Electrical Machines Laboratory, Autumn 2016 • EE: 101 Electrical Sciences Tutorial, Spring 2018, Autumn 2018 Professional • EE: 371 Instrumentation and Control, Spring 2017, Autumn 2019 Activities • EE: 580: Electrical Machines, Autumn 2019, Autumn 2020 • EE: 580: Control of Electric Drives, Spring 2020 EE: 101 Electrical Sciences Tutorial, Spring 2018 • Professional Memberships: • Student Member IEEE • IEEE Power Electronics Society Member Journal: • R. Kumar, P. Kumar, T. Kanekawa and K. Oishi, "Stray loss model for induction motors with using equivalent circuit parameters," IEEE Transactions Energy Conversion., vol. 35, no. 2, pp. 1036- 1045, June 2020. Publications • R. Kumar, P. Kumar, “Core Loss Estimation for an Inverter-fed Induction Motor With More Accurate Realization of Material Non-linearity and Impact of Hysteresis Minor Loops," IEEE Transactions Energy Conversion.(1st revision submitted). • R. Kumar, P. Kumar, T. Kanekawa and K. Oishi, "Stray loss model for induction motors with using equivalent circuit parameters," (Under-review) Conference: R. Kumar and P. Kumar, "Modelling of Stray-Load Loss for Medium Power Induction Motors," IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, Washington, DC, 2018, pp. 571- 576, doi: 10.1109/IECON.2018.8591650. • Secured 99.23 percentile in GATE 2006, all India rank (AIR)-150 in Electrical Engineering Paper. • Received Certificate of Merit in Secondary Examination Rajasthan State. Academic • Awarded MHRD (now Ministry of Education), Government of India scholarship for Masters at IIT Honours Kanpur. • Awarded Ph.D. Scholarship (2015-20) by the Ministry of Human Resource and Development (now Ministry of Education), Government of India at IIT Guwahati. Academic: 1. Ph.D. Research Project -IIT Guwahati Title: Analysis and Evaluation of Electromagnetic Losses in Induction machines and Their Impact on Motor Design and Performance. Guided by: Prof. Praveen Kumar Period: Dec 2015 - Present Tasks undertaken as a part of thesis work are: • Analysis and formulation of stray losses in terms of a motor's design based parameters. • Design of low stray loss motor using the proposed formulation. • Estimation of iron loss in IM with more accurate realization of material non-linearity and impact of hysteresis minor loops. • Analysis of stray losses in inverter fed induction machines. 2. Graduate Research Projects –IIT Kanpur: Title: Stability Analysis of RELAP5 Mathematical Model of a Boiling Water Reactor. Guided by: Prof. P. Munshi, Prof. M.S. Kalra, IIT Kanpur Period: Jan 2009 to Feb 2010 The work presents a mathematical analysis for the stability of RELAP5 hydrodynamic model of a BWR with using method of characteristics. Behaviors of the governing equations are plotted for various flow regimes for the determination of stability. 3. Graduate term-papers: • Plutonium Reproduction & Recycling Guided By: Prof. Ashok Khanna, IIT Kanpur; Collaborator- Subhash Sharma • Optical Condition Monitoring Guided By: Prof. Nandini Gupta, IIT Kanpur Projects 4. Undergraduate Projects- SBCET, University of Rajasthan, Jaipur Period: July 2009 to Feb 2010 • Automatic Voltage Regulator: Design and development of an automatic voltage regulator model for domestic power supply. Study on Characteristics and performance measures of AVR with negative feedback concept for voltage control with using electronic devices and circuitry. • Radio Telephonic Interfacing: Design of VHF (very high frequency) Radio telephonic interfacing unit. The unit incorporated full featured telephone set and monitor speaker. Industrial (With Industry Partners Of E-Mobility Lab, IIT Guwahati) 1. Stray Losses in Induction Machines Sponsoring Agency: TMEIC, Japan. Period: Oct 2016 - June 2017 Identification and modelling of various sources of stray losses in a medium power grid-connected IM. Formulation of SL for the design of a low SL induction motors. The work involved: Design and prototyping of eight-2.5kW, IE3 induction machine prototypes of different slot dimensions cage cage-bar material. Design and prototyping of eight-75kW, IE3 induction machine prototypes of different slot dimensions cage cage-bar material. 2. Design, Development of 12kW Induction Motor for Light Commercial Vehicle Sponsoring Agency: NFTDC Hyderabad Period: Oct2016 - June 2017 Design of wide speed, torque range IM; development of Epstein frame; characterization of the lamination steel for iron losses and real magnetizing behaviour using the Epstein frame. 3. Design, Development of Outer-rotor Induction Motor (Induction Hub Motor) for Electric 2- wheeler Sponsoring Agency: NFTDC Hyderabad Period: July 2019 - Dec 2017 Design of high torque density, low speed IM-hub motor for e-scooter. 4. Design and Development of 500W IM for Chiller/Ventilator Sponsoring Agency: NFTDC Hyderabad Period: July 2019 - Dec 2017 Design of high torque density, low speed IM-hub motor for e-scooter. 5. Design of Multi-pole Inductor Motor for Medium Speed-range Electric Bus Sponsoring Agency: KPIT Pune Period: August 2018 to March 2019 Design of 2+4 dual pole stator winding three-phase IM for a class-4 commercial electric vehicle. 6. Techno commercial Evaluation of EV Drivetrain for Commercial Vehicles (P-I) Sponsoring Agency: Ashok Leyland Period: August 2018 to March 2019 Identifying the suitable drivetrain configuration based on multi-criteria decision-making. Selection of motor topologies for various drivetrain configurations. Identifying the configurations for the motor topologies. 7. Failure analysis of 30MW, Grid-connected Hydro-alternator Sponsoring Agency: Meghalaya Electric-Power Generation Corp. Limited, Shillong Period: Sept 2019 to April 2020 Root cause analysis of the winding-failure occurred in a grid-connected hydro alternator. 8. Design of 1.5kW Cookie Motors for Electric Scooter Sponsoring Agency: NFTDC Hyderabad Period: April 2018 to July 2020 Design of 4, 6 and 8 pole cookie-IMs for electric two-wheeler. 9. Design of 25KVA Metal-clad-PCB Inverter Sponsoring Agency: E-Mobility Lab, IIT Guwahati Period: July 2020 to Dec 2020 Design, development, and testing of a high current metal-clad PCB inverter for the testing of IM prototypes. • Prof. Dr.-Ing. PRAVEEN KUMAR Professor Department of Electronics and Electrical Engineering Indian Institute of Technology (IIT) Guwahati North Guwahati, 781 039 Assam, India Tel.: +91-361-2582525 (O); Fax: +91-361-2582542 Email: [email protected] References • Prof. PRABHAT MUNSHI Professor Nuclear Engineering and Technology, Indian Institute of Technology (IIT) Kanpur Kanpur, 208016 U.P., India Tel.: +91-512-2597243 (O) Email: [email protected] I do hereby declare that the information provided above is true to best of my knowledge and belief. Declaration Place: Guwahati Date : 4/3/2021 (Rajendra Kumar) .