Publications

Journal Publications

  • [J.6] 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
  • [J.5] 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 Journal of Emerging and Selected Topics in Power Electronics, vol. 8, no. 3, pp. 3139-3150, Sept. 2020, doi: 10.1109/JESTPE.2019.2917658.
  • [J.4] 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 Transactions on Power Electronics, vol. 34, no. 11, pp. 11429-11441, Nov. 2019, doi: 10.1109/TPEL.2019.2899899.
  • [J.3] 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
    Transactions on Power Electronics, vol. 34, no. 3, pp. 2900-2913, March 2019. doi:
    10.1109/TPEL.2018.2843777
  • [J.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 Seven-Level Flying
    Capacitor Multilevel Inverter With an Active Energy Buffer,” in IEEE Transactions on Power
    Electronics, vol. 32, no. 11, pp. 8570-8581, Nov. 2017. doi: 10.1109/TPEL.2017.2650140
  • [J.1] P. Kirawanich, N. Kranthi, R. Gunda, A. R. Stillwell, and N. E. Islam, “A Method to
    Characterize the Interactions of External Pulses and Multiconductor Lines in Electromagnetic
    Topology Based Simulations,” Journal

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