Ph.D. in Linear Motor Drives - Optimum Design Specialist

Profile Summary

Ph.D. in Linear Motor Drives (Power Electronics and Machine Design), with over 1 year of organisational experience.

Designed an energy-efficient 3-Phase induction motor compliant with IS 12615:2011 standards, focusing on performance optimization and regulatory compliance.

Performed comprehensive testing of 3-Phase induction motors as per IS 4029 and IEC 60034 standards, including efficiency, thermal, and electrical validation.

Reviewed the design and tested a 3-phase back-to-back VFD ensuring compliance with IEEE 519 for harmonic limits for adjustable speed electrical power drive systems for compressor industry.

Prepared power architecture and controller logic for AFEC, FOC, active magnetic bearings for a compressor unit as a part of industrial prototype; reviewed code with peers for approval.

Designed Active Magnetic Bearing (AMB) systems with integrated position sensing and real-time control, ensuring compliance with ISO 14839 for rotor dynamics and stability, as well as adhering to API 684 guidelines for rotor- dynamic analysis and balancing.

Proficient in analytical packages like ANSYS-Electromagnetics, FPGA, MATLAB, PLECS and open-source languages such as SCILAB, C with working experience in 5S Projects.

Rich Understanding of the complete hardware product life cycle and related standard compliances and comprehensive knowledge of electronic circuits, hardware specifications and schematics. Core Competencies

Electrical Machine

Design &

Analysis

PMSM/ BLDC/

Syn.RM design

Control logic of

AFE, FOC, DTC

Testing &

Debugging

Embedded Software

Design &

Development

Management skills

Technical Skills

Simulation: ANSYS-Electromagnetics, Thermal, MATLAB/Simulink, LTSpice, PLECS, SCILAB

Analytical: C, Python

Documentation: LATEX, Inkscape, MS Office, MS Excel

Digital platform: FPGA (ALTERA I - Cyclone) EP1C12Q240C8; TMS320F28377D (Embedded C in Code Composer Studio) Education

Indian Institute of Engineering Science and Technology, Shibpur

(formerly Bengal Engineering and Science University) Howrah, India

Ph.D. in Linear Motor and Drives Apr’2015 - Feb’2024

M.E. in Electrical Engineering

Specialization: Power Electronics and Drives, Percentage: 71.4 % Jul’2011 - Jun’2013

Asansol Engineering College (affiliated to West Bengal University of Technology) Asansol, India

B.Tech. in Electrical Engineering, DGPA: 7.97/10 Jul’2006 - Jun’2010 D.A.V. Public School, Rupnarayanpur, (CBSE) W.B., India

All India Senior School Certificate Examination (AISSCE): 77 % (Science) Apr’2006

All India Secondary School Examination (AISSE): 89.6 % Apr’2004 MONOJIT SEAL

Project Engineer, Foundation of Innovation & Development, IISc Bangalore ****.*******@*****.*** +91-905*******

Village: Amdanga, Rupnarayanpur Bazar, Barddhaman(W), WB - 713386 (Permanent) Department of E.E., IISc Bangalore (Correspondent) Date of Birth: 21st February 1988 (Male) Nationality: Indian Work Experience

Foundation of Innovation & Development (FSID) IISc, Bangalore, India

Project Engineer : Industrial Project (Design verification, R&D, Project management) Feb’ 2024 – till date National Mission for PE Technology (funded by NaMPET – III) IIEST, Shibpur, India

Senior Project Associate : POC project (Design verification, R&D, Team management) Mar’ 2023 – Feb’ 2024

Project Associate Dec’ 2021- Mar’ 2023

Bineswar Brahma Engineering College (NPIU, TEQIP- III) Kokrajhar, India

Assistant Professor in Dept. of E.E.: (Academic, Administrative, R&D) Oct’ 2018 – Sep’2021 Centre of Excellence (funded by TEQIP – II) IIEST, Shibpur, India

Senior Research Fellow (Design, fabrication, testing, documentation, TA, R&D) Dec’ 2015 – Oct’ 2018

Junior Research Fellow (Design, fabrication, testing, documentation, TA, R&D) Dec’ 2013 - Nov’ 2015 Dept. Of Electrical Engineering, RCCIIT Beleghata, W.B., India

Lecturer (Academic) Jul’2013 - Dec’2013

STEEL AUTHORITY OF INDIA LIMITED (SAIL) Durgapur, W.B., India

Vocational Trainee Jul’2008 (15 days)

Technical Activities

As Project Engineer (in an industrial project) FSID, IISc,Bangalore Designed energy-efficient 3-phase, 160 kW induction motors compliant with IS 12615:2011 for industrial applications; conducted performance optimization and full validation as per IS 4029 and IEC 60034 standards. 2024 – Till date

Skills used: ANSYS- Electromagnetics, Design verification, DSP programming Reviewed and tested 3-phase back-to-back VFD (up to 200 kW) for compressor applications; ensured IEEE 519 harmonic compliance and supported controller development for AFEC and FOC logic.

Skills used: Power electronics, VFD testing, Debugging, Controller design, SCILAB, DSP programming. Developed Active Magnetic Bearing (AMB) systems with integrated position sensors and real-time control; ensured rotor dynamic compliance with ISO 14839 and API 684 for high-speed compressor rotors.

Skills used: Power electronics, VFD testing, Debugging, Controller design, SCILAB, DSP programming. As Assistant Professor BBEC, Kokrajhar

Research project awarded by ASTU (funded by TEQIP-III, NPIU) under Competitive Research Scheme,

as PI: ‘Modelling of UPS as a backup and Reactive Power Compensation and developing the topology and control strategy for the same’, in 2020, Fund amount: 3L (INR).

as Co-PI: ‘Design and Control of Synchronous Reluctance Motor for Fan/Two-wheeler Applications’, in 2020, Fund amount: 2L (INR).

2018 – 2021

Skills used: ANSYS, C, MATLAB, LTSPICE, Project management, Purchase. As part of R&D Consultant team IIEST, Shibpur, India

Designed 7.5 kW, 48V, 3000 rpm outer rotor PMSM for EV application as Machine Design Engineer with IIT Kharagpur for UAY (a GoI project)

Conducted design analysis and efficiency verification of submersible pumps, identified performance improvements through minor design modifications for Shakti Pumps Pvt. Ltd. (Indore). 2017 – 2018

Skills used: ANSYS- Electromagnetics, Design verification, MATLAB, Simulink. As part of Ph.D. works IIEST, Shibpur, India

Design, analysed and fabricated a 3-phase, 320 W, 4 pole, 5 m/s linear PMSM. 2014 – 2015

Skills used: AutoCAD, C, ANSYS-Maxwell, SS thermal, Electromagnetics. Designed and implemented control algorithm for linear PMSM with improved stability in position sensor-less mode which improved overall performance.

2015 – 2016

Skills used – FPGA (Altera-II), MATLAB, Simulink, Hardware implementation, Testing and debugging. Design, analyzed and fabricated a 3-phase, 500 W, 4 pole, 2.5 m/s tubular LIM. 2016 – 2017

Skills used: AutoCAD, C, ANSYS-Maxwell, SS thermal, Electromagnetics Parameter estimation and implemented closed-loop sensorless speed control strategy for tubular LIM. 2021 - 2022

Skills used: FPGA (Altera-II), MATLAB, Simulink, Hardware implementation, Testing and debugging. As part of M.E. works IIEST, Shibpur, India

Designed and fabricated a 3-phase CSI using analog devices as a part of static Kramer drive for a 5 kW SR Induction Motor

2011 – 2013

Skills used: PSPICE, MATLAB, PCB, BOM, Hardware design Scholastic Achievements

Published 3 articles in SCI (Q2) journals, and presented 5 conference papers (Annexure A)

GATE Scholarship in M.E. (GATE 2011, Score: 469) in Electrical Engineering Soft Skills

Analytical Numerical

competency

Accuracy Communicator Positive

attitude

Target-

oriented

Interests & Hobbies Achievements

Cricket, Football

Exploring new AI tools (such as ChatGPT, Gork etc.) REFERENCE(s)

1. Prof. Mainak Sengupta, Professor, E.E., IIEST-Shibpur, email - ***.**@*******.******.**.**; ******.********@*****.***

2. Prof. G. Narayanan, Professor, E.E.C.S., IISc, Bangalore, email - ****@****.**.** Declaration

I hereby declare that all the information given above is true and correct to the best of my knowledge. Place: Kolkata Date: 19.04.2025 Monojit Seal

Journals

ANNEXURE - A

J1. M. Seal and M. Sengupta, ‘An alternative approach for the determination of electromechanical parameters of a tubular linear induction motor and its experimental validation’, Sa dhana, 2023, DOI https://doi.org/10.1007/s12046-023-02168-2

J2. M. Seal and M. Sengupta, ‘Optimised design, analysis, fabrication and experiments on a tubular linear induction motor prototype’, Sa dhana Vol. 47, No. 4, August 2022, pp. 1-20, DOI https://doi.org/10.1007/s12046-022-01942-y

J3. M. Seal and M. Sengupta, ‘Design, analysis and fabrication of a linear permanent magnet synchronous machine’, Sa dhana Vol. 42, No. 8, August 2017, pp. 1419–1429, DOI 10.1007/s12046- 017-0687-8

Conferences papers

C1. Mahapatra, A., Monojit Seal, and M. Sengupta. "An alternative analytical thermal model of a laboratory developed LPMSM prototype with its FEM analysis and experimental validation." 2023 11th National Power Electronics Conference (NPEC). IEEE, DOI: 10.1109/NPEC57805.2023.10385009 C2. N. Sarma and M. Seal, ‘Design and analysis of a 200 W ferrite magnet Syn. RM for EV applications’, 2022 4th International Conference on Energy, Power and Environment (ICEPE), 2022, IEEE, DOI 10.1109/ICEPE55035.2022.9798327.

C3. M. Seal and M. Sengupta, ‘Parameter estimation and performance evaluation of a Linear Permanent Magnet Synchronous Motor prototype’, PEDES 2018, IIT, Chennai, IEEE, pp. 1-5, DOI 10.1109/PEDES.2018.8707761.

C4. M. Seal and M. Sengupta, ‘Design, analysis, fabrication and comparison of Linear Induction Motor and Linear Permanent Magnet Synchronous Motor’, PIERS 2016, Shanghai, China, DOI: 10.1109/PIERS.2016.7734796.

C5. M. Seal and M. Sengupta, ‘Design, analysis and fabrication of a linear permanent magnet synchronous machine’, NPEC 2015, IIT Mumbai, India. ANNEXURE - B

(Brief about Academic Projects)

Ph.D. (in Electrical Engineering)

Title: Design, fabrication and experiments on Linear PMSM and Tubular LIM prototypes Objective: Worked on design, analysis, fabrication and development of efficient 320W linear PMSM and 500W tubular LIM drive and FEM base electromagnetic and thermal design (Software support – ANSYS-MAXWELL). A CL sensorless speed control strategy has been proposed and implemented on the fabricated prototypes eliminating inherent instability in V/f drive with proper frequency modulation using concepts of power perturbation using fixed point per-unitization technique (Digital Processor used – Fixed Point FPGA based processor, Altera, Cyclone II).

M. Tech. (in Power Electronics and Drives)

Title: Investigation of doubly-fed Induction Machine. Objective: In this work simulations and experiments on scalar and vector control methods for a Slip Ring Induction Motor (SRIM) is implemented. It includes offline and real-time FPGA simulations, V/f control implementation, and investigations into stator-side and rotor-side vector control. Designed and developed CSI to implement static Kramer drive on a 3-phase SRIM 5.5 kW, 4-pole, 50 Hz to achieve speed variation and slip power feedback using analog circuitry.

B.Tech. (in Electrical Engg.)

Title: Design & fabrication of PC based level including controller using admittance type sensor Objective: The project involved designing and implementing a water level monitoring and control system using an admittance-type sensor, which detects water levels based on its electrical properties. An analog controller was developed to automate the control process based on the sensor's output. Research Statement: Linear Motors for Advanced Maglev and Defence Applications The future of high-speed transportation and next-generation defence systems depends on high- performance, reliable, and efficient actuation technologies. Linear motors, which eliminate the need for rotary-to- linear conversion mechanisms, provide a compelling solution for direct thrust generation with minimal mechanical complexity. Their potential to enable frictionless, high-speed, and contactless propulsion makes them foundational in

(i) Maglev trains,

(ii) Hyperloop

(iii) Electromagnetic launch systems and

(iv) Textile industry applications.

My research focuses on the multi-domain development of linear motor systems—from electromagnetic modelling and simulation to control design and hardware prototyping—with primary applications in magnetic levitation transport and defence-related propulsion technologies. Fig. LIM with hybrid secondary for the textile industry 1. Electromagnetic Modelling and Finite Element Simulation In this modelling of linear motors, especially long-stator linear synchronous motors (LS-LSMs) and linear induction motors (LIMs), using both analytical formulations and finite element analysis (FEA) can be explored:

Magnetic field distribution, end effects and eddy current losses

Force and thrust ripple analysis for high-speed stability

Structure of the system for motion

Material selection (e.g., soft magnetic composites, high-performance permanent magnets) This stage informs design optimization for thrust density, energy efficiency and thermal performance under dynamic operating conditions.

Fig. 2-D FEM simulation: Magnetic field plot of LIM 2. Control Strategies for Linear motors

Stable propulsion and thrust in maglev systems demand precise, fast-response control strategies. My proposal of work includes:

Robust and adaptive control for position and thrust regulation under parameter variations

Sensorless estimation and fault-tolerant control for mission-critical applications

Co-design of the motor-drive-control system for synchronized operation of levitation and propulsion units

These approaches are essential in realizing safe, redundant and autonomous linear motion operation under varying load and track conditions.

Fig. Schematic diagram of the closed loop sensorless V/f control scheme 3. Hardware Integration and Experimental Validation Simulation and control development are matched with hardware-oriented prototyping, using:

Real-time control platforms (e.g., dSPACE, OPAL-RT, or TI C2000)

HIL (hardware-in-the-loop) validation of control algorithms

Scaled lab prototypes to experimentally verify propulsion and stability dynamics This integrated approach ensures that my theoretical and simulation results are grounded in real-world constraints, preparing the path for scalable deployment. Fig. Photograph of LAUNCHXL-F2800137 Development kit 4. Strategic Defence Applications

Linear motor technologies are increasingly relevant to defence systems, particularly in:

Electromagnetic launch systems (EMLs) for aircraft catapults or projectile accelerators

Silent propulsion for naval or unmanned ground systems

High-speed logistic movement systems within military installations The research would contribute toward custom motor designs tailored to high acceleration profiles, compact footprints, and high energy conversion efficiency—all vital for modern defence needs. Future Research Vision

As transportation and defence platforms evolve toward contactless, autonomous, and intelligent systems, I aim to establish a comprehensive research program around:

AI-assisted motor design and control

Digital twins of linear propulsion systems

Multiphysics co-simulation for combined electrical, thermal and structural analysis

Sustainable and lightweight linear motor platforms for mobile and modular applications Through collaboration with industry, government R&D, and academic institutions, I envision developing next-generation linear motor systems that can power the fast, clean, and secure mobility infrastructure of the future. Teaching Statement:

1. Teaching Philosophy

Teaching philosophy is the belief that learning should be application-oriented, inclusive and intellectually stimulating. I aim to bridge the gap between theory and practice by integrating classroom instruction with real-world engineering problems. In power electronics, where system design demands deep understanding of devices, topologies, and control strategies, students benefit immensely when concepts are reinforced through simulations, hardware labs and simple projects. Students should be thriving in an environment that encourages curiosity, collaboration, and creativity. I actively promote class participation and hands-on learning by incorporating problem-based learning

(PBL) and software tools like MATLAB/Simulink, LTSpice and embedded system platforms. 2. Teaching Experience and Approach

In my previous teaching and mentoring roles, I have taught or assisted in courses such as:

Power Electronics

Electric Drives and Control

Electrical machines

Advanced Motor Drives

My classes start with a theoretical foundation, followed by intuitive visualizations. I make a conscious effort to connect classroom topics to current trends in industry, such as SiC/GaN devices, electric mobility, renewable integration and digital control.

I assess learning using a combination of quizzes, assignments and project-based evaluations. I also design lab modules that allow students to build and test power converters and drive systems to reinforce theoretical understanding through practical exposure.

3. Student Mentorship and Inclusion

Fortunately, I get to mentor students both inside and outside the classroom. I have supervised student projects on topics like inverter design, BLDC drive development and active front-end converters. I also encourage students from diverse backgrounds and learning styles by adopting flexible teaching strategies and ensuring open communication channels.

4. Future Plans

As a faculty member, I aspire to design interdisciplinary projects that link power electronics with areas such as electric vehicles, grid integration, and AI-based control. I aim to establish a power electronics laboratory where students can prototype, test and innovate. I also wish to contribute to curriculum development, outreach programs, and research collaborations with industry and government bodies. 5. Conclusion

Teaching is more than delivering content—it is about inspiring, challenging and preparing the next generation of engineers. I view every lecture as an opportunity to ignite curiosity, every lab as a chance to build confidence, and every student as a future contributor to technological advancement. I look forward to contributing to a vibrant academic community where teaching excellence, research, and societal impact go hand in hand.

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