EV Power Electronics Engineer EV Systems & BMS Expert

RATHNA KUMAR

EV Power Electronics Engineer DC-DC · PFC · Inverter Design · PMSM FOC · OBC MATLAB/Simulink IIT Roorkee Certified

+91-799******* ******************@*****.*** LinkedIn GitHub PROFESSIONAL SUMMARY

Results-driven EV Systems Design Engineer with 2+ years of production automotive embedded experience (AUTOSAR COM stack, CAN/LIN, ECU integration) and deep specialisation in Power Electronics, Battery Management Systems (BMS), and PMSM Motor Control. Contributed to Electric Braking System (EBS) and Battery Cooling ECU integration on live electric bus programs. Designed and validated DC-DC converters, PFC converters, FOC/SPWM inverters, cell balancing systems, CC-CV chargers, and SOC/SOH estimators (EKF) using MATLAB/Simulink/Simscape. Certified in Electric Vehicle Design — IIT Roorkee (iHUB DivyaSampark). Targeting OEM and Tier-1 roles in Power Electronics, BMS, EV Charging Systems, and Automotive Embedded engineering. TECHNICAL SKILLS

Electric Vehicle & Power Electronics: DC-DC Buck & Boost Converters PFC Converter SPWM Inverter Design AC-DC Rectification 3-Phase VSI (IGBT-based, 120 /180 Conduction) Gate Driver Design EV On-Board Charger (OBC) CC-CV Charging Bidirectional Charging (G2V/V2G) EV Charging Infrastructure Electric Vehicle Fundamentals Motor Control: PMSM Motor Drives Field Oriented Control (FOC) Space Vector PWM (SVPWM) Clarke/Park Transforms d-q Axis Decoupling Torque & Speed Control Motor Drive Efficiency Analysis BLDC Control Fundamentals Battery Management Systems: SOC Estimation (Coulomb Counting + EKF / Kalman Filter) SOH Estimation Active & Passive Cell Balancing Battery Thermal Management CC-CV / CV-CC Charging OCV-SOC Lookup Li-ion Battery Modelling Equivalent Circuit Model (ECM) Overcharge/Over-Discharge Protection 48V Battery Module Design Simulation & Control Systems: MATLAB Simulink Simscape Extended Kalman Filter (EKF) PID & PI Controller Tuning Bode Plot & Stability Analysis Ziegler-Nichols Tuning Dynamic System Modelling Control System Design Embedded & AUTOSAR: AUTOSAR R4.x BSW Configuration (ComM, PduR, CanIf, Candriver) DaVinci Configurator Pro Vector CANoe Embedded C MCAL(PWM,CAN) Protocols:CAN SPI LIN UDS ETHERNET Microcontrollers & Tools: Infineon AURIX (TriCore) Renesas RH850 STM32 ARM Keil WinIDEA Debugger Eclipse IDE Mechanical & Hardware Exposure: PCB Design Basics Proteus Mechanical Sub-systems Standards & Safety: AIS Standards CMVR Regulatory Framework ISO 26262 (Awareness) EV Testing Fundamentals Battery Protection EV Charging Standards (OCPP Basics) Artificial Intelligence & Software: Artificial Intelligence (AI) PROFESSIONAL DEVELOPMENT

Electric Vehicle Trainee Jan '25 - Feb '26

Intellipaat Remote

• Gained hands-on expertise in Electric Vehicle architecture, including battery systems, PMSM motor drives, and power electronics (DC-DC converters, inverters, OBC).

• Applied BMS design principles including battery sizing, SOC/SOH estimation, and EV charging infrastructure — covering CC- CV charging and bidirectional G2V/V2G topologies.

• Developed understanding of AIS Standards/ CMVR EV safety standards, battery protection techniques, and regulatory compliance requirements for low-voltage automotive systems. POWER ELECTRONICS PROJECTS (MATLAB / SIMULINK / SIMSCAPE) PMSM Motor Drive — Field Oriented Control (FOC) IIT Roorkee EV Program

• Implemented FOC for a PMSM using Clarke/Park transforms and dual PI current controllers (Id/Iq) for fully decoupled torque and flux control across 0–3000 RPM.

• Designed cascaded speed-current loop with Space Vector PWM (SVPWM); achieved ~15% reduction in harmonic content vs. SPWM and 10 RPM steady-state speed regulation under load-step disturbances.

• Validated FOC efficiency superiority over scalar V/f control — directly applicable to EV traction inverter and OBC power stage development.

CC-CV Charging & PFC Converter — EV On-Board Charger (OBC) IIT Roorkee EV Program

• Developed CC-CV Li-ion charging algorithm modelling full charge profile (1C rate bulk 95% SOC) with automatic mode switching; achieved <3% overshoot at CC CV transition.

• Designed a boost-based PFC converter with average current mode control regulating 400V DC bus from 230V AC; achieved Power Factor >0.99, THD <5% — IEC 61000-3-2 Class A compliant.

• Validated closed-loop DC bus at 400V with <2% voltage ripple under 20% mains variation — meeting OBC design standards for EV charging infrastructure.

3-Phase VSI Inverter — 180 & 120 Conduction Mode Analysis IIT Roorkee EV Program

• Designed a 6-pulse three-phase VSI inverter with IGBT gate pulse sequencing (180 /120 ) from 400V DC bus; performed FFT harmonic analysis on phase and line voltage outputs.

• Documented conduction mode trade-offs: 180 mode delivered +13.8% fundamental output voltage; 120 mode eliminated neutral point voltage shift — EV inverter design reference. DC-DC Buck & Boost Converter Design IIT Roorkee EV Program

• Designed Buck converter (24–48V 12V) and Boost converter (12V 48V) with closed-loop PI regulation; <2% output ripple and settling time <50 ms under step load transients.

• Analysed CCM/DCM boundary conditions, switching loss, and diode reverse recovery; validated stability via Bode plot phase/gain margin analysis.

PID Cruise Control System — Vehicle Dynamics IIT Roorkee EV Program

• Designed closed-loop PID cruise control (60–120 km/h) with <2% steady-state error; modelled aerodynamic drag, rolling resistance, and drivetrain dynamics in the plant model.

• Tuned PID gains via Ziegler-Nichols method; validated via Bode plot — settling <8 s, overshoot <8%, speed error <0.5 km/h under 15% road grade disturbances.

WORK EXPERIENCE

AUTOSAR Embedded Developer -Electric Bus Programs Nov 2023 -Dec 2024 S2 Technology & Consulting GmbH

• Contributed to the development of Electric Braking Systems (EBS) for electric bus platforms, ensuring compliance with AUTOSAR architecture, automotive safety standards, and communication protocols

• Designed and configured CAN communication, including messages, signals, and DBC files for reliable inter-ECU data exchange

• Integrated and validated HVAC and Battery Cooling ECUs within the vehicle network architecture, ensuring seamless system communication

• Performed automotive communication analysis and validation using Vector CANoe, identifying and troubleshooting network-level and signal-level issues

AUTOSAR COM Stack Developer — Camera ECU Integration Apr 2023 – Aug 2023 RealThingks GmbH

• Developed and configured AUTOSAR COM Stack (BSW) for Front Camera ECU, ensuring compliance with functional safety and communication standards

• Implemented signal-to-PDU mapping (SWC to COM layer) using AUTOSAR architecture for efficient data exchange

• Performed end-to-end CAN communication validation using Vector CANoe, ensuring data integrity and timing accuracy

• Analyzed and resolved communication stack and network issues, enhancing ECU communication reliability and system performance

CERTIFICATIONS

• Executive PG Certificate in Electric Vehicle Design — IIT Roorkee, iHUB DivyaSampark & Intellipaat [Jan 2025-Feb 2026]

• AUTOSAR MCAL PWM Fundamentals — Participation Certificate, ANCIT EDUCATION

B.Tech — Electronics & Communication Engineering — Nalanda Institute of Technology, JNTUK Jun 2016

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