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Andrew R Stillwell

Andrew R Stillwell
Andrew R Stillwell

Andrew R Stillwell

Assistant Professor
  • Electrical and Computer Engineering
4054 ECE Building

Education

  • Ph.D., Electrical and Computer Engineering, University of Illinois Urbana-Champaign, 2019
  • M.S., Electrical and Computer Engineering, University of Illinois Urbana-Champaign, 2016
  • B.S., Electrical Engineering, University of Missouri-Columbia, 2005
  • B.S., Computer Engineering, University of Missouri-Columbia, 2005

Other Professional Employment

  • Group Manager, National Instruments, Austin, TX, 2006-2013

Research Interests

  • Power Electronics
  • Alternative and Renewable Energy Systems
  • Transportation Electrification
  • Wide Bandgap Power Devices
  • Design Optimization

Research Areas

  • Efficient energy management and conversion for lighting, communications, information technology, transportation, and appliances
  • Energy storage conversion, management, and control
  • Gallium nitride power semiconductors
  • Power and Energy Systems
  • Power electronics

Research Topics

  • Electric transportation
  • Solar and renewable technology
  • Storage and conversion

Selected Articles in Journals

Articles in Conference Proceedings

  • [C.11] A. Stillwell and R. C. N. Pilawa-Podgurski, "Design Optimization of a 1500 V GaN-Based Solar Inverter Using Flying Capacitor Multi-Level Converter Stages," 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, 2019, pp. 4605-4612. doi: 10.1109/ECCE.2019.8913007
  • [C.10] E. Candan, A. Stillwell, N. C. Brooks, R. A. Abramson, J. Strydom and R. C. N. Pilawa-Podgurski, "A 6-level Flying Capacitor Multi-level Converter for Single Phase Buck-type Power Factor Correction," 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), Anaheim, CA, USA, 2019, pp. 1180-1187. doi: 10.1109/APEC.2019.8722199
  • [C.9] A. Stillwell, E. Candan and R. C. N. Pilawa-Podgurski, “Constant Effective Duty Cycle Control for Flying Capacitor Balancing in flying Capacitor Multi-Level Converters,” 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL), Padua, Italy, 2018, pp. 1-8. doi: 10.1109/COMPEL.2018.8460000
  • [C.8] M. E. Blackwell, A. Stillwell and R. C. N. Pilawa-Podgurski, “Dynamic Level Selection for Full Range ZVS in Flying Capacitor Multi-Level Converters,” 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL), Padua, Italy, 2018, pp. 1-8. doi:10.1109/COMPEL.2018.8460086
  • [C.7] A. Stillwell, M. E. Blackwell and R. C. N. Pilawa-Podgurski, “Design of a 1 kV Bidirectional DC-DC Converter with 650 V GaN Transistors,” 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX, USA, 2018, pp. 1155-1162. doi: 10.1109/APEC.2018.8341162
  • [C.6] A. Stillwell and R. C. N. Pilawa-Podgurski, “A 5-Level Flying Capacitor Multi-Level Converter with Integrated Auxiliary Power Supply and Start-up,” 2017 IEEE Applied Power Electronics Conference and Exposition (APEC), Tampa, FL, USA, 2017, pp. 2932-2938. doi:10.1109/APEC.2017.7931113
  • [C.5] A. Stillwell, D. Heeger, C. Meyer, S. Bedair and R. C. N. Pilawa-Podgurski, “An Interleaved 1-to-6 Step-up Resonant Switched-Capacitor Converter Utilizing Split-Phase Control,” 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA, 2016, pp. 1-8. doi: 10.1109/ECCE.2016.7854854
  • [C.4] E. Candan, A. Stillwell and R. C. N. Pilawa-Podgurski, “A Reliability Assessment of Series-Stacked Servers with Server-to-Bus Differential Power Processing,” 2016 IEEE International Telecommunications Energy Conference (INTELEC), Austin, TX, USA, 2016, pp. 1-7. doi: 10.1109/INTLEC.2016.7749094
  • [C.3] A. Stillwell, Y. Lei and R. C. N. Pilawa-Podgurski, “A Method to Extract Low-Voltage Auxiliary Power from a Flying Capacitor Multi-Level Converter,” 2016 IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL), Trondheim, Norway, 2016, pp. 1-8. doi: 10.1109/COMPEL.2016.7556747
  • [C.2] Y. Lei, C. Barth, S. Qin, W. C. Liu, I. Moon, A. Stillwell, D. Chou, T. Foulkes, Z. Ye, Z. Liao, and R. C. N. Pilawa-Podgurski, “A 2 kW, Single-Phase, 7-level, GaN Inverter with an Active Energy Buffer Achieving 216 W/in3 Power Density and 97.6% Peak Efficiency,” 2016 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2016, pp. 1512-1519. doi: 10.1109/APEC.2016.7468068
  • [C.1] A. Stillwell and R. C. N. Pilawa-Podgurski, “A Resonant Switched-Capacitor Converter with GaN Transistors for Series-Stacked Processors with 99.8% Power Delivery Efficiency,” 2015 IEEE Energy Conversion Congress and Exposition (ECCE), Montreal, QC, 2015, pp.563-570. doi: 10.1109/ECCE.2015.7309739

Professional Societies

  • Member, IEEE

Courses Taught

  • ECE 333 - Green Electric Energy
  • ECE 464 - Power Electronics
  • ECE 469 - Power Electronics Laboratory