EV Motor Design Engineer with R&D Focus

EDUCATION

Bachelor’s in Technology in Electrical and Electronics Engineering

Jawaharlal Nehru Technological University Hyderabad (Arjun College) Diploma in Electrical and Electronics Engineering

AP State Board of Technical Education and Training (S.M.V.M Polytechnic) Electrical Motor Design Engineer with 3.5 years hands on experience in Electric Vehicles Motor development. Strong experience in analytical design, simulation analysis, testing, validation and root cause analysis of field failures for motors in electric vehicles. Skilled in leveraging MATLAB and Python to automate design analysis and data processing, to improving the productivity and reliability. Passionate about developing robust, efficient systems and contribute to next generation EV Technologies. PROFILE

+91-798******* ******************@*****.***

KOMMIREDDY SIVA SAI VARUN

Design Engineer R&D

LANGUAGES

English

Telugu

Hindi

2022 - 2024

G.P.A : 6.69

2019 - 2021

92%

TECHNICAL SKILLS

Design and Testing Skills : Analytical Machine Designing, Motor Characteristic Testing, Vibrations Analysis and Testing, Design Failure Mode and Effects Analysis (DFMEA), EMI/EMC Testing Simulation Software's : MATLAB Simulink, Ansys Motor Cad, Altair Flux, Finite Element Analysis

(FEMM), Microsoft Office, LibreOffice, AutoCAD

Programming & Signal Analysis Software’s : MATLAB, Python, Latex Simulation Automation Tool’s : MATLAB App Designing, MATLAB Report Generation, Latex Report Automation, LibreOffice Python

Testing Software’s : NI LabView, Vibration and Acoustics Analysis Software’s (SVAN PC++, Adash DDS, Acoem dBTrait)

PROFESSIONAL SKILLS

Analytical Thinking

Root Cause Analysis

Team Collaboration

Adaptability

Good at learning software’s quickly and error’s troubleshooting Communication Skills

Technical Documentation

PROFESSIONAL EXPERIENCE

JUNIOR ENGINEER R&D (MEDHA SERVO DRIVES Pvt.Ltd) July 2022 - Present Testing of DMDE Propulsion Motor

Performed the characteristic and temperature raise tests. Performed vibrations testing in 1/3 rd octaves analysis. Used the NI LabView for processing the vibration signal data. Performed EMI/EMC testing according to MIL standards, identified and controlled the root cause for the problems faced.

PMSM Motor Design & Validation for Electric Vehicles Basic analytical approximation of the machine parameters. Optimized the machine design and improved the efficiency and thermal performance. Pre-estimated the machine behavior for different test cases using simulation and analytical approaches.

Validation of the performance of the machine (Speed - Torque Operations, Thermal Operating Time) in the practical testing.

Analyzed the special operating cases like sudden short circuit transient current in simulation and validated it with the practical results.

Analyzed the resolver signals (sine & cosine waves) and estimated the rotor position. Automated the simulation process by creating standard MATLAB scripts. Created standard MATLAB scripts for the better visitation and understanding of the simulation results and effects.

Created standard python scripts for the practical tests signal analysis (like waterfall spectral analysis of the vibrations).

Involved in the manufacturing procedure of the machine. PMSM Motor Design for Mining Vehicles

Analyzed different design topologies like Tandem Drive, Star/Delta Switching, Multi-Phase Machine, Dual 3 Phase, 5 Phase Star/Pentacle/pentagon Switching. Analytically estimated the load on the motor from the tractive effort and vehicle speed in case of operation of the level shifted gear box.

Validated the Star/Delta and Dual 3-Phase characteristic's of the machine the machine with the practical behavior.

Permanent Magnets Testing & Validation

Analytically estimated the permanent magnets parameters according to the magnets dimension’s.

Simulated and estimated the permanent magnets characteristics for practical validation. Tested and Validated the flux densities of the permanent magnets used in the manufacturing of the PMSM machines.

Performed the ageing test and observed the lifespan the permanent magnets according to their thermal class of operation.

Design Failure Mode and Effect Analysis (DFMEA)

Listed the different types of failures that occur in the real time practices in PMSM machines. Listed the reasons for the occurrence of a failure in the PMSM machines. Listed the control methods to prevent the occurrence of the failure in the PMSM machines. Automated Report Generation

Developed a MATLAB app to generate a pdf report for the simulation analysis performed on the machine. This report generation app is integrated with the MATLAB report generation library. Developed a python script to generate a editable libre office writer document for the simulation analysis performed. This python script was integrated with libre office python library. Utilized latex tool the creating the automatic report generation standard templated.

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