Motor Design & Development Engineer

ROHITH P

Motor Design & Development Engineer — EV & Advanced Electric Machines IPM PMSM, Ferrite PM, Induction, Drone Motors JMAG, ANSYS Maxwell, RMxprt

Coimbatore, Tamil Nadu +91-915******* ******.********@*****.*** linkedin.com/in/rohith-ponnuraj

PROFESSIONAL SUMMARY

Motor design and development engineer with 3 years' experience across EV traction, PM, induction, and SynRM machines. Hands-on across the full development cycle: electromagnetic design, winding and slot-pole selection, turns calculation, magnet sizing, rotor/stator geometry optimization, thermal evaluation, demagnetization studies, efficiency estimation, and prototype support, using JMAG, ANSYS Maxwell 2D and 3D, and RMxprt.

Delivered EV traction and PM motors including an IPM PMSM bike traction motor, 48 V/72 V ferrite IPM PMSM platforms, a V-shaped PM tractor motor, an out-runner drone motor, and a BLDC coolant pump motor. Earlier experience spans induction motor and SynRM development for industrial applications, covering cost optimization, winding redesign, high-speed motor design, and design automation.

KEY ACHIEVEMENTS

●IPM PMSM EV bike traction motor — 8 kW nominal / 16 kW peak, 100 V platform, 3000 rpm rated / 7000 rpm max.

●Ferrite IPM PMSM motors — 48 V/6 kW and 72 V/10 kW, both 2600 rpm rated / 6000 rpm max.

●V-shaped PM tractor traction motor — 12 kW nominal / 22 kW peak, 2200 rpm rated / 5500 rpm max.

●Out runner drone motor — 120 KV, 44.4 V architecture.

●BLDC coolant pump motor — 340 W, 12 V automotive auxiliary application.

●~27% BoM cost reduction on a 9.3 kW, 4-pole induction motor while maintaining 89.3% efficiency.

●7.5 kW, 415 V, 2-pole, 20,000 rpm induction motor using multiple-strand winding to reduce ripple-current losses and surface eddy-current effects.

●Automated winding-sheet generation and engineering documentation with Python, reducing manual effort.

CORE SKILLS

Electric Machine Design: EV traction motor design, IPM PMSM, ferrite PM motor development, BLDC, induction motors, SynRM, drone/high-speed motors, winding design and slot-pole selection

Electromagnetic Analysis: Torque-speed design and optimization, back-EMF evaluation, loss estimation, magnet sizing and PM material trade-off, demagnetization analysis, efficiency improvement, magnetic circuit design

Thermal / Validation: Thermal evaluation in JMAG, prototype support, basic motor testing, design iteration from validation feedback

Tools: JMAG, ANSYS Maxwell 2D and 3D, RMxprt, SolidWorks, Free CAD, AutoCAD 2D, Python, MATLAB (basic), C/C++ (basic)

PROFESSIONAL EXPERIENCE

Motor Design Engineer — Visaiyon Energies and Electro Motors Pvt. Ltd. Jul 2025 – Present

●IPM PMSM EV bike traction motor — 8 kW nominal / 16 kW peak, 100 V platform, 3000 rpm rated / 7000 rpm max.

●Ferrite IPM PMSM motors — 48 V/6 kW and 72 V/10 kW architectures, 2600 rpm nominal / 6000 rpm max speed.

●V-shaped PM tractor traction motor — 12 kW nominal / 22 kW peak, 2200 rpm rated / 5500 rpm max speed.

●Developed an out-runner drone motor (120 KV, 44.4 V) optimized for high power-density operation.

●Designed a 340 W BLDC coolant pump motor for a 12 V automotive auxiliary application, max speed 3500 rpm.

●Performed end-to-end development: electromagnetic design, winding design, slot-pole selection, turns calculation, magnet sizing, rotor/stator geometry optimization, thermal evaluation, demagnetization analysis, efficiency estimation, and prototype support.

●Carried out JMAG-based electromagnetic and thermal studies to evaluate torque-speed performance, losses, efficiency, and temperature behaviour; supported basic testing and iterated designs from feedback.

●Worked across EV, agricultural, drone, and auxiliary automotive motor platforms.

Electrical Design Engineer, NPD — Ramdev’s Motors Jan 2025 – Jun 2025

●Redesigned a pump motor platform to improve manufacturability on automatic winding machines by addressing winding-process constraints in the existing design.

●Improved production feasibility while addressing performance and efficiency limitations of the earlier configuration, using RMxprt and engineering calculations for evaluation and redesign support.

Electrical Design Intern, R&D — Lakshmi Electrical Drives Ltd. Aug 2023 – Jan 2025

●Designed induction motors from 0.12 kW to 110 kW across 2-pole to 12-pole configurations for industrial applications.

●Contributed to high-efficiency SynRM motor development for industrial applications, focusing on performance optimization.

●Achieved ~27% BoM cost reduction on a 9.3 kW, 4-pole induction motor while maintaining 89.3% efficiency through design and material optimization.

●Designed a 7.5 kW, 415 V, 2-pole induction motor for 20,000 rpm operation using multiple-strand winding to reduce ripple-current-related conductor losses and surface eddy-current effects.

●Designed stator stampings for 90, 100, 112, and 132 frame motor platforms.

●Automated winding-sheet generation and engineering documentation using Python, improving workflow efficiency and reducing manual effort.

EDUCATION

●B.Tech, Aerospace Engineering — Lovely Professional University, 2018–2022. Co-authored research on hybrid-electric propulsion systems for ATR 72-600 aircraft applications.

CERTIFICATIONS

BLDC Motor & Controller Diagnostics (Mar 2025)

Servo Motor Design & Testing (Oct 2024)

Python Beginner to Pro (Apr 2024)

ANSYS Structural & Thermal (Jul 2019)

SolidWorks Modelling & Drafting (Jul 2019)

STANDARDS / TECHNICAL EXPOSURE

IEC 60034 · IS 12615:2018 · IS 996:2009 · Motor electromagnetic design and optimization · Prototype support, testing, and design iteration · Design documentation and engineering workflow automation

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