Aakash Kamalapur
Graduate Student Research Assistant at University of Colorado Boulder
Incoming PhD candidate at Virginia Tech's Center for Power Electronics Systems (CPES) | Graduate Research Assistant at CU Boulder's Colorado Power Electronics Center (CoPEC)
After working with Autodata for 4 years and having sought CU Boulder's rigor in advanced circuit analysis from Prof. Maksimovic, I will be joining Prof. Cvetkovic and Prof. Boroyevich from Virginia Tech's Center for Power Electronics Systems (CPES) towards pursuing a PhD in wide operating range controls for high wattage power density converters.

Skillset:

Power converter control design and simulation:
• Researching source material for advocating topologies specific to an application.
• Simulating a topology’s open and closed loop operation in PSIM, MATLAB and Simulink with Zero-Order-Hold (ZOH), unit delay of PWM, induced ground bounce and step changes in load.
• Validating control laws and digital filters written in embedded C and tested in PSIM before deploying to DSP.

Converter topology deployment:
• Developing driver solutions for IGBTs, employing VCE saturation protection scheme using pulse transformers and high slew rate OP-AMP ICs for fast gate turn-on and turn-off times, without degrading the integrity of software deadband.
• Troubleshooting power device failures and taking necessary action in drive circuits along with writing immediate stopgaps in DSP in case of component scarcity or man-power absence.

Analog instrumentation and embedded target:
• Developing instrumentation for AC and DC signals for closing feedback control loops, comparator-based protections, DSP sampling, zero crossing techniques and grid synchronization.
• Prototyping common-ground and galvanic isolation-based circuits with trade-off between response times and signal quality, employing active filtering circuits and isolation amplifiers.
• Bare metal coding with assembly instructions SPI, I2C and UART for reading multiple Digital Inputs (DIs), energizing contactors for disabling soft-start (and other DOs), storing time stamped alarms in EEPROM for communication with master control unit or similar slave power modules in a redundant n+1 parallel power supply system and for RTCs.
• Writing drivers for industrial communication protocols like MODBUS RTU over RS485 lines. Also learning to build MODBUS RTU to MODBUS TCP-IP converter.

DSP algorithm validation and coding:
• Developing and optimizing controllers in assembly language based on forward, backward and bilinear transformation of analog compensators with varied integrator saturation schemes.
• Writing floating point FIR and IIR filters in 32-bit DSPs based on bilinear transformation with frequency warping of analog filters for filtering signal with ground bounce noise sampled at 2xFSW, between ringing intervals.
University of Colorado Boulder
https://www.linkedin.com/company/cuboulder
Working with Prof. Dragan Maksimovic on:
1. Developing loss models in power converters which are fed to ML models.
2. Designing prototypes of converters with Si and GaN for corroborating solutions from closed-form loss expressions.
Boulder, Colorado, United States
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Graduate Student Research Assistant
University of Colorado Boulder
https://www.linkedin.com/company/cuboulder
ECEN 5007: Power electronics for electric drive vehicles (Instructor: Prof. Dragan Maksimovic) 

ECEN 4517/5517: Power electronics for PV lab (Instructor: Prof. Dragan Maksimovic)
Boulder, Colorado, United States
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Graduate Student Teaching Assistant
University of Colorado Boulder
https://www.linkedin.com/company/cuboulder
ECEA 5715: Capstone design project in Power Electronics 

ECEA 5005: Open loop PV Power Electronics lab

Courses hosted by University of Colorado, Boulder on Coursera. Instructed by Prof. Robert Erickson and Prof. Dragan Maksimovic. 

My role is to hold office hours and answer queries with power stage simulation, control law design, power supply control modelling along with validating magnetics in simulations/hardware submitted by students
Boulder, Colorado, United States
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Course Facilitator
Cummins Inc.
https://www.linkedin.com/company/cummins-inc
Power electronics and Control

1. Developed a first-pass DDSRF PLL for a 6.85kW 4-legged inverter (Application: Defense)
2. Developed first-pass controls for a 6.85kW 4-legged inverter under unbalanced load (Application: Defense)
3. Developed design procedure for coupled inductors of a 30kW 2-phase and 143kW 4-phase Interleaved Boost Converter (Application: Truck electric drivetrain)
Fridley, Minnesota, United States
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Electronic Systems Intern
Autodata Tech
https://www.linkedin.com/company/auto-data
Development engineer building control laws for high wattage power electronics, finding applications as DC-DC power supplies for manufacturing processes and AC-AC, AC-DC, DC-AC power quality improvement (FACTS).
Mumbai Area, India
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Product Development Engineer
Technophilia
https://www.linkedin.com/company/technophilia
A now defunct company, before the advent of Edtech firms, Technophilia Systems Pvt Ltd. catered to delivering high quality embedded systems knowledge to Indian undergrads from IITs, colleges affiliated with Anna university, VTU, University of Mumbai, VIT, Manipal Institute of Technology, PDPU. I worked as a student brand ambassador for the company during my junior and senior engineering of bachelor's, touring with instructors to different cities and delivering embedded systems knowledge to other students.
Mumbai Area, India
Student Brand Ambassador
MS in Electrical Engineering
Power Electronics
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University of Colorado Boulder
https://www.linkedin.com/school/cuboulder/
Bachelor of Engineering (BE)
Completed my bachelors in electrical and electronics engineering standing with a rank of 9/73. Secured highest and awarded for the courses of Embedded C & 8051, Digital Signal Processing and Object Oriented Programming (OOP) in C++. My coursework also gave me an opportunity in presenting my senior design project, "Automated electric vehicle for the differently abled people", which was also nominated for funding from VGST, Karnataka (a Karnataka state government body).
Electrical and Electronics Engineering
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KLE Institute of Technology, HUBLI
https://www.linkedin.com/school/kle-institute-of-technology-hubli/
IIT integrated service
12th
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Aakash Digital
https://www.linkedin.com/school/aakash-digital/
High School Diploma
9th through 11th
10th CGPA: 9.8
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DAV Public School, Nerul
https://www.linkedin.com/school/dav-public-school-navi-mumbai/
AECS 1,2,3,4: 1st through 8th.
Atomic Energy Central School, Mumbai
https://www.linkedin.com/school/atomic-energy-central-school/
• Revised software for each power module by writing a PI control law with robust saturation wind-up for emulating the operation of adjust amplifier in UC3907 for low bandwidth load share.
• Analyzed the effects of removing DC-link caps for reducing ITHD% and passed on the information to the production team to update their BoM.
300 V/3500 A Rectifier for CED process
• Developed a cascaded voltage and decoupled current controller in TMS320F28069 – TI’s piccolo line of DSP – for closed loop control of Active Front End (AFE) IGBT converter.
• Incorporated a discrete integrator in the code based on the bilinear transformation of an analog RC circuit for eliminating nuisance tripping during soft start.
800 V/187.5 A Fast Electric Vehicle (EV) charger
• Developed a thyristor-based switching algorithm for soft starting 3 phase induction motors operating under wide spectrum of the speed-torque characteristic of the motor.
• Successfully commissioned the product in a sugar manufacturing plant with bringing 12 more of orders of the same spec for other sugar processing plants in the country.
415 V/600 A Rotor Resistance Starter
• Built the closed loop algorithm in DSP by emulating UC3907 IC’s operation for paralleling 10 SMPS modules to increase a paint-shop’s capacity from 12 JPH to 15 JPH (Jobs/Hour).
• Successfully commissioned the IGBT based power supply which allowed for significantly higher efficiencies (greater than 91% from 15% of load) and less than 1% current ripple.
400 V/750 A Rectifier for Cathodic Electro Deposition (CED)
• Wrote additional subroutines for APF to measure 5th to 49th harmonic amplitude and phase angle based on Clarke’s and Park’s transformation for individual and composite harmonic correction relative to client specs and our costing constraints.
• Successfully proved out capabilities of the algorithm in foundry, textile and automobile industries where the loads are entirely electric welders, VFDs and thyristorized drives.
3-phase 3-wire 60 A Active Harmonic Filter – AHF
• Developed a MIMO control strategy in the DSP to shape AC grid
current and DC-link voltage of a 3-phase IGBT Bi-directional converter.
• Designed an algorithm to measure the reactive current component of load for injecting leading
or lagging profile of current into the grid for power factor correction at incomers.
Active Power Filter – APF
• Developed an analog circuit for driving the motor of an autotransformer in either direction for
standalone voltage or current control loops.
• Built an analog PI on the logic board, for on-the-fly adjustment of control dynamics. Anyone
with an intuitive understanding of the process could tune the loops by adjusting these gains,
thereby freeing up our service team from on-site visits.
600 V/800 A Variac controlled 6-pulse diode rectifier
A Inverse Kinematics (IK) model was created from arm dimensions whose cartesian co-ordinate setpoints were passed into a gradient descent based optimization. This optimization algorithm returned the joint angles for all the six motors in the arm to reach a specific co-ordinate in the cartesian plane. Any trajectory in the cartesian plane was made possible, as long as the co-ordinate setpoint was within the reach of the arm.
Simulation of controlling a Six Degrees of Freedom robotic manipulator
Automated electric vehicle for the differently abled
Modelling and simulation of a PI controller for position control of a DC motor
Modelling and simulation of permanent magnet synchronous motors
https://sg.linkedin.com/in/sesha-sai-kumar-p-b361829b
Singapore
Sesha Sai Kumar P
Research Engineer | Power Electronics | Rolls-Royce @NTU Corporate Lab|
https://in.linkedin.com/in/dr-kumar-swamy-v-192b87a4
Karnataka, India
Dr. Kumar Swamy V.
Associate Professor at K.L.E.Instiute of Technology
https://www.linkedin.com/in/aiswarya-rachel-cherian
Boulder, CO
Aiswarya  Rachel Cherian
Power electronics graduate student from CU Boulder|Looking for full time oppurtunities
https://www.linkedin.com/in/aarohijaiswal
Boulder, CO
Aarohi Anil Jaiswal
Graduate Student at University of Colorado Boulder | Power Electronics | Analog IC design
https://www.linkedin.com/in/sandeshchitnis
Pullman, WA
Sandesh Chitnis
Hardware Engineer at Schweitzer Engineering Laboratories (SEL)
https://www.linkedin.com/in/kishor-gaikwad
Carrollton, TX
Kishor Satish Gaikwad
Power Electronics Control Engineer at Lennox International
https://www.linkedin.com/in/aroraabhilash
Raleigh, NC
Abhilash Arora
Incoming Power Application Intern @ Wolfspeed | Research Assistant @ FREEDM| Electric Mobility| Power Electronics & Drives| Systems Engg | Ex-Mahindra
https://www.linkedin.com/in/haris-bin-ashraf
Fairfax, VA
Haris Bin Ashraf
Graduate Research Assistant - CPES Virginia Tech
https://www.linkedin.com/in/akash-karmakar-805436bb
Boulder, CO
Akash Karmakar
Graduate Student at University of Colorado Boulder
https://www.linkedin.com/in/sai-kiran-voruganti-8b21a9121
Dallas-Fort Worth Metroplex
Sai Kiran Voruganti
Power Electronics Engineer at Linear Labs Inc.
https://www.linkedin.com/in/suma-jothibasu-47146a74
Austin, TX
Suma Jothibasu
Engineer Scientist at Electric Power Research Institute (EPRI)
https://www.linkedin.com/in/andrew-thibeault-21b087b0
Boulder, CO
Andrew Thibeault
Energy Engineering MS student at CU Boulder
https://www.linkedin.com/in/tom-blue-4ab408225
United States
Tom Blue
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https://www.linkedin.com/in/vinay-koneri-udaya-bhanu-10757114
Vinay Koneri Udaya Bhanu
Digital Design Engineer at Cirrus Logic
https://in.linkedin.com/in/rajaniupadhyay
Karnataka, India
Rajani Upadhyay
Project Engineer at Wipro, .Net Developer
https://www.linkedin.com/in/deans
Pullman, WA
Dean Stevens
Building products to make electric power safer, more reliable, and more economical.
https://in.linkedin.com/in/gayatri-kalmane-4b62761aa
Hubli
Gayatri Kalmane
Student at KLE Institute of Technology, HUBLI
https://www.linkedin.com/in/santhiyasampathkumar
Lexington, KY
Santhiya Sampath Kumar
Sr. CAD Engineer at Cypress Semiconductor Corporation | Miami University | PSG Tech
https://in.linkedin.com/in/rajeshyakkundimath
Karnataka, India
Dr. Rajesh Yakkundimath
Ph.D.(CSE)
https://in.linkedin.com/in/jinendra-bafna-b24575152
Karnataka, India
Jinendra Bafna
Student at KLE Institute of Technology, HUBLI
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This video is pretty much one of the cleanest EV battery design briefing including all aspects from design, calculations, Thermal management and BMS…
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John Deere presents an Autonomous Battery Electric Tractor with 1 MWh battery capacity!Thanks to all working with me on this revolutionary project.…
Electrical Motors and Generators
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CORPE (Center of Reliable Power Electronics)
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IEEE Power Electronics Society Young Professionals
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Digital Power Electronics Control
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APEC - Applied Power Electronics Conference
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Electrical Design Engineer Jobs
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Where analog and power electronics meet knowledge
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CU-Boulder Colorado Power Electronics Center (CoPEC)
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IEEE Power Electronics Society
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