Motor Control Engineer for EV Drives and BLDC Systems

KONDA NARESH

I +91-944******* +91-900******* #**************@*****.*** ïlinkedin.com/in/konda-naresh-011b00277

OBJECTIVE

To support an automotive/EV company as an EV Power Electronics & Motor Drives Engineer by delivering validated traction power solutions (DC–DC, inverter, motor control) that improve efficiency, reduce DC-link rip- ple/THD, and speed up verification using MATLAB/Simulink and OPAL-RT HIL. PROFESSIONAL SUMMARY

EV Power Electronics & Motor Drives Engineer with hands-on work in high-gain DC-DC converters, traction inverter integration, and sensorless BLDC control (back-EMF/zero-crossing + commutation table + hysteresis cur- rent control). Differentiator: I cover the full traction chain (battery DC-DC DC-link inverter motor) and de-risk controls early through HIL validation, enabling faster prototype-to-product readiness.

{ TECHNICAL SKILLS

• EV Powertrain

• Traction Inverter

• Sensorless BLDC Motor Control

• V/F Control

• High-Gain DC–DC Converters

• DC-Link Design

• MATLAB/Simulink

• OPAL-RT HIL

• TI C2000 & DSPIC33

• Code Composer Studio

• Proteus PCB Design

• Gate Driver Design

KEY ELECTRIC VEHICLE (EV) PROJECTS

• Project-1: Compact VSI Development (3-Leg 2-Leg) for Sensorless BLDC Traction Jul 2022 – Jun 2024

– Goal: Reduce inverter size/cost for compact EV traction while maintaining stable BLDC commutation.

– Converted a conventional 3-leg VSI into a 2-leg inverter structure to reduce switch + gate-driver count and wiring complexity.

– Developed switching/commutation logic to synthesize 3-phase operation with safe current paths and shoot-through protection.

– Added noise-aware signal conditioning and sector-transition safeguards to avoid false commutation under EMI.

– Validated through MATLAB/Simulink + OPAL-RT HIL: phase-voltage quality, current controllability, and transient stability.

• Project-2: High-Gain (HG/HVG) DC–DC Converter Development for EV DC-Link Boosting Jan 2023 – Dec 2025

– Goal: Boost 48 V battery to a stiff high-voltage DC-link for sensorless BLDC drive.

– Developed HVG/HG DC–DC topologies (e.g., QBC + quasi-Z hybrid / switched-capacitor gain) to achieve high step-up at moderate duty.

– Performed gain derivation, CCM operation analysis, and device stress/loss checks to ensure reliable traction duty operation.

– Designed magnetics and capacitors using ripple constraints (e.g., 20% inductor ripple, bounded DC-link ripple) and practical fs.

– Validated converter dynamics via simulation + OPAL-RT pulse generation, confirming stable DC-link under load/speed disturbances.

• Project-3: Sensorless BLDC Speed Control Using Volt/Hertz (V/F) Concept Jul 2023 – Feb 2025

– Goal: Simple, robust sensorless speed control with low torque ripple and good low-speed behavior.

– Implemented V/F control by maintaining constant V/f ratio for smooth torque, low steady-state speed error, and fast dynamic response.

– Integrated the control with Modified Isolated Weinberg (MIW) DC–DC converter, including a switched-inductor boost stage for higher gain/efficiency.

– Reduced control complexity by avoiding mechanical sensors and minimizing commutation dependency in the speed loop.

– Verified in MATLAB/Simulink (2018a) with OPAL-RT-generated pulses for converter + inverter switching.

• Project-4 (Final): Integrated Sensorless BLDC Traction for Foldable E-Scooter (Indian Roads) Jul 2022 – Dec 2025

– End-to-end chain: 48 V HG DC–DC regulated 460 V DC-link VSI sensorless BLDC.

– Implemented dual-loop coordination: PI DC-link regulation (converter duty) + hysteresis-based commutation table (VSI switching).

– Ensured stiff DC-link to improve back-EMF clarity, reduce torque ripple, and improve reliability at low speed

/ road-load transients.

– Demonstrated tracking of 400–2000 rpm and torque up to 10 N·m with fast transient recovery (sim + prototype).

– Measured peak efficiencies: DC–DC 92.8%, VSI 96%, motor 95%, overall 84.6%. lWORK EXPERIENCE

• National Institute of Technology (NIT), Raipur July 2022 – Present Research Scholar (EV Power Electronics & Sensorless BLDC Drives)

– PhD research on sensorless BLDC drives for compact EV traction (converter–inverter–motor integration).

– Developed high-gain DC–DC converters and PI-based DC-link regulation for stable bus control.

– Implemented sensorless control using back-EMF commutation, hysteresis current control, and V/F speed control.

– Studied reduced-switch inverter concepts (3-leg to 2-leg) to reduce hardware complexity.

– Validated using MATLAB/Simulink and OPAL-RT HIL; documented results for publications and reviews.

EARLIER EXPERIENCE

• Netaji Institute of Engineering & Technology March 2018 – June 2022 Assistant Professor – Electrical Engineering

• Vignan Institute of Engineering & Technology March 2015 – May 2018 Assistant Professor – Electrical Engineering

– Taught power electronics, electrical measurements, and motor drives to undergraduate students.

– Guided engineering projects related to BLDC drives, DC–DC converters, and industrial power electronics.

EDUCATION

• PhD – National Institute of Technology Raipur

– Specialization: EV power electronics and motor drives (sensorless BLDC drives, high-gain DC–DC converters, traction inverter integration).

– Tools/Validation: MATLAB/Simulink modeling and OPAL-RT OP4510 HIL testing.

• M.Tech – Lords Institute of Engineering & Technology (J.N.T.U Hyderabad)

– Focused on power electronics and electric drives with project work in converter/inverter systems.

• B.Tech – Netaji Institute of Engineering & Technology (J.N.T.U Hyderabad)

– Built strong fundamentals in electrical machines, power systems, control systems, and power electronics. A PUBLICATIONS [SCI’S] (SELECTED)

[J.1] K. Naresh, D. Suresh and S. Pattnaik, "Enhanced Urban E-Mobility Using a High-Gain Converter Fed Sensorless BLDC Drive," in IEEE Transactions on Power Electronics, doi: 10.1109/TPEL.2026.3670951

[J.2] Konda Naresh, et al. (2026). High-Gain Two-Leg Inverter for Sensorless BLDC Motor Drives in EV Applications in International Journal of Circuit Theory and Applications.

[J.3] Konda Naresh, et al. (2025). High-Voltage Gain DC–DC Converter for Sensorless Speed Control of BLDC Motor in International Journal of Circuit Theory and Applications.

[J.4] Konda Naresh, et al. (2025). An Integrated SSVC Converter and Robust Low-Speed Sensorless Control for High-Performance BLDC Drives in Electrical Engineering.

[J.5] Konda Naresh, et al. (2025). Sensorless speed control of BLDC motor drive using Volt/Hertz method in International Journal of Electronics.

zDECLARATION

I hereby declare that the information provided above is true and correct to the best of my knowledge and belief. Place: Secunderabad, Telangana Date: March 25, 2026

(Konda Naresh)

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