Andrew R. Stillwell
Assistant Professor | Power Electronics & Electrified Systems
Andrew Stillwell is an Assistant Professor in the Department of Electrical and Computer Engineering at the University of Illinois Urbana-Champaign and leads the Stillwell Power Group. His research develops high-performance power-conversion technologies for demanding electrification applications.
His work spans power-converter topology, multilevel and hybrid switched-capacitor conversion, wide-bandgap power electronics, motor drives, transportation electrification, data-center power delivery, pulsed power, control, and converter design optimization.
Research
Developing power-electronic systems that push the limits of efficiency, power density, dynamic performance, voltage capability, and system integration.
Advanced Power Conversion
Multilevel, interleaved, resonant, and hybrid switched-capacitor converter architectures that use advanced semiconductor devices and circuit structures to improve efficiency, density, voltage capability, and waveform quality.
Transportation Electrification
High-performance motor drives, pulsed-power systems, and power-conversion technologies for electric aircraft and other transportation applications where mass, efficiency, and reliability are critical.
Data-Center Power Delivery
Point-of-load and intermediate-bus power-conversion architectures for rapidly changing compute loads, including hybrid switched-capacitor converters and technologies aimed at integrated and in-package power delivery.
Controls & Design Optimization
Digital control, modeling, experimental validation, and system-level optimization of power converters, with particular emphasis on understanding the interactions among topology, devices, passives, controls, and application requirements.
Education
Ph.D., Electrical & Computer Engineering
University of Illinois Urbana-Champaign, 2019
M.S., Electrical & Computer Engineering
University of Illinois Urbana-Champaign, 2016
B.S., Electrical Engineering
University of Missouri, 2005
B.S., Computer Engineering
University of Missouri, 2005
Selected Recognition
AFOSR Young Investigator Award
2025
Levenick Teaching Sustainability Fellowship
Institute for Sustainability, Energy, and Environment, 2020–2021
Professional Background
Before returning to graduate school, Prof. Stillwell worked at National Instruments in Austin, Texas, where he held engineering and management roles from 2006 to 2013.
Teaching & Mentoring
Prof. Stillwell teaches courses in renewable electric energy, power electronics, converter laboratories, advanced power conversion, and electric mobility while mentoring undergraduate and graduate researchers in the Stillwell Power Group.