Andrew R Stillwell

For More Information

• Power and Energy Systems Area
• Stillwell Power Group

Education

• UIUC, ECE, Ph.D. in Electrical and Computer Engineering, 2019
• UIUC, ECE, M.S. in Electrical and Computer Engineering, 2016
• University of Missouri, EECS, B.S. in Electrical Engineering, 2005
• University of Missouri, EECS,  B.S. in Computer Engineering, 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
• Power Converter Design Optimization
• Pulsed Power Design

Research Topics

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

Selected Articles in Journals

• N. Stokowski, A. Freeman, A. Rodgers, A. Delmar, J. Sengstock, A. Solecki, A. Stillwell, "Design and Validation of an 8-Level Flying Capacitor Multilevel Converter for Electric Aircraft Pulse Deicing," in IEEE TTE, doi: 10.1109/TTE.2026.3705992.
• S. Aflatounian, S. Subramaniyan, K. Luo, S. Dewanjee, V. Ganesan, O. R. Gittus, E. A. Muller, G. Prentice, M. J. Payne, A. Stillwell, P. V. Braun, N. Miljkovic, "Comparative evaluation of dielectric liquids for single-phase immersion cooling of electronics", International Journal of Heat and Mass Transfer, Volume 265, 2026, 128765, ISSN 0017-9310, https://doi.org/10.1016/j.ijheatmasstransfer.2026.128765.
• A. Bali, X. Zhang, A. Bose, K. S. Haran and A. Stillwell, "Analysis and Design of a Multilevel Interleaved Hybrid Active Neutral Point Clamped Inverter for Electric Aircraft Propulsion," in IEEE OJPEL, vol. 7, pp. 209-225, 2026, doi: 10.1109/OJPEL.2025.3644673.
• Khodakarami, S., Agarwal, V., Kabirzadeh, P., Solecki, A., Hoque, M. J., Yang, W., Stokowski, N. , Jacobs, J., Chatterji, A., Lovelace, E., Stillwell, A., and Miljkovic, N. (September 30, 2024). "Aircraft Electrothermal Pulse Deicing." ASME. J. Heat Mass Transfer. January 2025; 147(1): 012401. https://doi.org/10.1115/1.4066396
• Mohammad Jalal Inanlu, Yashraj Gurumukhi, Pouya Kabirzadeh, Rishi Anand, Siavash Khodakarami, Vishal Viswanathan, Andrew Stillwell, Nenad Miljkovic, Capacitive sensing of frost growth dynamics on aluminum surfaces with different wettabilities, International Journal of Heat and Mass Transfer, Volume 225, 2024, 125377, ISSN 0017-9310, https://doi.org/10.1016/j.ijheatmasstransfer.2024.125377.
• M. E. Blackwell, A. Stillwell and R. C. N. Pilawa-Podgurski, "Dynamic Level Changing for Full Range ZVS in Flying Capacitor Multi-Level Converters," in IEEE OJPEL, vol. 3, pp. 574-586, 2022, doi: 10.1109/OJPEL.2022.3200371.
• Longnan Li, Siavash Khodakarami, Xiao Yan, Kazi Fazle Rabbi, Ahmet Alperen Gunay, Andrew Stillwell, Nenad Miljkovic, "Enabling Renewable Energy Technologies in Harsh Climates with Ultra-Efficient Electro-Thermal Desnowing, Defrosting, and Deicing," in Advanced Functional Materials, vol. 32, no. 31, August 2022
• E. Candan, N. C. Brooks, A. Stillwell, R. A. Abramson, J. Strydom and R. C. N. Pilawa-Podgurski, "A Six-Level Flying Capacitor Multilevel Converter for Single-Phase Buck-Type Power Factor Correction," in IEEE TPEL, vol. 37, no. 6, pp. 6335-6348, June 2022, doi: 10.1109/TPEL.2021.3122739.
• M. G. Taul, N. Pallo, A. Stillwell and R. C. N. Pilawa-Podgurski, "Theoretical Analysis and Experimental Validation of Flying-Capacitor Multilevel Converters Under Short-Circuit Fault Conditions," in IEEE TPEL, vol. 36, no. 11, pp. 12292-12308, Nov. 2021, doi: 10.1109/TPEL.2021.3075447.
• Hoque, M. J., Gunay, A., Stillwell, A., Gurumukhi, Y., Pilawa-Podgurski, R. C. N., and Miljkovic, N. "Modular Heat Sinks for Enhanced Thermal Management of Electronics." ASME. J. Electron. Packag. June 2021; 143(2): 020903.
• P. Birbarah, T. Gebrael, T. Foulkes, A. Stillwell, A. Moore, R. C. N. Pilawa-Podgurski, N. Miljkovic, "Water immersion cooling of high power density electronics," in International Journal of Heat and Mass Transfer, vol. 147, pp 118918, Feb. 2020
• A. Stillwell and R. C. N. Pilawa-Podgurski, "A Resonant Switched-Capacitor Converter With GaN Transistors for High-Efficiency Power Delivery to Series-Stacked Processors," in IEEE JESTPE, vol. 8, no. 3, pp. 3139-3150, Sept. 2020, doi: 10.1109/JESTPE.2019.2917658
• A. Stillwell, E. Candan and R. C. N. Pilawa-Podgurski, "Active Voltage Balancing in Flying Capacitor Multi-Level Converters With Valley Current Detection and Constant Effective Duty Cycle Control," in IEEE TPEL, vol. 34, no. 11, pp. 11429-11441, Nov. 2019.
• A. Stillwell and R. C. N. Pilawa-Podgurski, "A 5-Level Flying Capacitor Multi- Level Converter with Integrated Auxiliary Power Supply and Start-Up," in IEEE TPEL, vol. 34, no. 3, pp. 2900-2913, March 2019.
• 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 Seven-Level Flying Capacitor Multilevel Inverter With an Active Energy Buffer," in IEEE TPEL, vol. 32, no. 11, pp. 8570-8581, Nov. 2017.

Articles in Conference Proceedings

• [C.20] A. K. Delmar, M. Khatua, H. Krishnamurthy, A. Stillwell, "Input-Inductor Cascaded Buck (I2CB) Converter for 48 V IBC Applications", 2026 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX, USA, 2026
• [C.19] N. Stokowski, A. Freeman, A. Rodgers, A. K. Delmar, J. Sengstock, A. Solecki, A. Stillwell, "An 8-Level Flying Capacitor Multilevel Converter for Electric Aircraft Pulse Deicing," 2025 IEEE Applied Power Electronics Conference and Exposition (APEC), Atlanta, GA, USA, 2025, pp. 1242-1247, doi: 10.1109/APEC48143.2025.10977181.
• [C.18] A. Bose, A. Bali, K. Haran and A. Stillwell, "A Generalized Multilevel Inverter & Slotless Permanent Magnet Motor-Drive Co-Design Framework," 2024 IEEE Energy Conversion Congress and Exposition (ECCE), Phoenix, AZ, USA, 2024, pp. 6212-6219, doi: 10.1109/ECCE55643.2024.10861656.
• [C.17] H. Qiu, P. Kabirzadeh, V. S. Garimella, A. Bali, K. Gurusami, K. J. Lee, A. Stillwell, T. Salamon, N. Miljkovic, "Single-Phase and Two-Phase Liquid Immersion Cooling of Data Center Power Supply Units for Heat Capture," 2024 23rd IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), Aurora, CO, USA, 2024, pp. 1-8, doi: 10.1109/ITherm55375.2024.10709424.
• [C.16] W. Vavrik, A. K. Delmar and A. Stillwell, "Control and Modeling of Current-Sourced Hybrid Switched-Capacitor Converters with Dynamic Loads," 2024 IEEE Workshop on Control and Modeling for Power Electronics (COMPEL), Lahore, Pakistan, 2024, pp. 1-7, doi: 10.1109/COMPEL57542.2024.10613950.
• [C.15] A. Solecki, S. Khodakarami, P. Kabirzadeh, M.J. Hoque, W. Yang,  N. Stokowski ,J. Jacobs, E. Lovelace, A. Stillwell, N. Miljkovic, "Design and Testing of an Efficient and Rapid Electro-Thermal Pulsed Interfacial De-Icing Framework for Electrified Aircraft," 2024 23rd IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), Aurora, CO, USA, 2024, pp. 1-7, doi: 10.1109/ITherm55375.2024.10709550.
• [C.14] A. Bali, X. Zhang, A. Bose, K. S. Haran and A. Stillwell, "A 7-Level Interleaved Hybrid Active Neutral Point Clamped Converter for High-Frequency Low-Inductance Motors," 2024 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024, pp. 561-566, doi: 10.1109/APEC48139.2024.10509087.
• [C.13] A. K. Delmar  and A. Stillwell, "Current-Sourced Hybrid Switched-Capacitor Converter for Data Center Power Delivery," 2024 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, CA, USA, 2024, pp. 1357-1362, doi: 10.1109/APEC48139.2024.10509139.

Professional Societies

• Secretary, IEEE PELS TC1, 2024 - present
• Member, IEEE

Teaching Honors

• ISEE Levenick Teaching Sustainability Fellow (2020-21)

Research Honors

• Air Force Office of Scientific Research Young Investigator Award (2025)