Assistant Professor
Contact
Kenneth H. Keller Hall
200 Union Street Se
Minneapolis, MN 55455
Assistant Professor
Ph.D., 2022, University of California San Diego
M.Sc., 2017, Bangladesh University of Engineering and Technology
All aspects of power electronics, from nW to GW power, from topologies to control, and from integrated power management to modular power converters.
2023 Outstanding Presentation Award, 2023 38th IEEE APEC, Orlando, Florida
2019 Best Paper Award, 2019 20th IEEE COMPEL, Toronto, Canada
2019 Outstanding Graduate Student Researcher Award-Gold, Dept. of ECEE, University of Colorado Boulder
2019 2nd Prize, Student Project Demonstrations, 2019 11th IEEE-ECCE, Baltimore, Maryland
2017 Dean’s Graduate Fellowship, University of Colorado at Boulder 2017
R. Das, H. P. Le, “Multi-output hybrid converters,” Aug 2018 (US Patent 11,496,045)
R. Das, H. P. Le, G. S. Seo, “Hybrid Converter Family and Methods Thereof,” Aug 2018 (US Patent 11,152,854)
R. Das, H. P. Le, “Switched Capacitor Motor Driver Inverter and Methods Thereof,” June 2023 (Under Preparation)
R. Das, G. S. Seo, H. P. Le, “Analysis of Dual-Inductor Hybrid Converters for Extreme Conversion Ratios,” in IEEE Journal of Emerging and Selected Topics in Power Electronics, Apr 2020.
G. S. Seo, R. Das, H. P. Le, “Dual Inductor Hybrid Converter for Point-of-Load Voltage Regulator Modules,” in IEEE Transactions on Industry Applications, vol. 56, no. 1, pp. 367-377, Jan 2020-Feb 2020.
R. Das, H. P. Le, “A Regulated 48V-to-1V/100A 90.9%-Efficient Hybrid Converter for POL Applications in Data Centers and Telecommunication Systems,” in 34th IEEE APEC, Anaheim, California, Mar 2019.
R. Das, G. S. Seo, D. Maksimovic, H. P. Le, “An 80-W 94.6%-Efficient Multi-Phase Multi-Inductor Hybrid Converter,” in 34th IEEE APEC, Anaheim, California, Mar 2019.
T. Xie, R. Das, G. S. Seo, D. Maksimovic, H. P. Le, “Multiphase Control for Robust and Complete Soft-charging Operations of Dual Inductor Hybrid Converter,” in 34th IEEE APEC, Anaheim, California, Mar 2019.
R. Das, G. S. Seo, H. P. Le, “A 120V-to-1.8V 91.5%-Efficient 36-W Dual-Inductor Hybrid Converter with Natural Soft-charging 2Operations for Direct Extreme Conversion Ratios,” in 10th IEEE ECCE, Portland, Oregon, Sep 2018.
G. S. Seo, R. Das, H. P. Le, “A 95%-Efficient 48V-to-1V/10A VRM Hybrid Converter Using Interleaved Dual Inductors,” in 10th IEEE ECCE, Portland, Oregon, Sep 2018.
R. Das, H. P. Le, “Two-Stage Power Delivery Architecture Using Hybrid Converters for Data Centers and TelecommunicationSystems,” Journal Paper Submitted for Peer Review, Oct 2022.
R. Das, H. P. Le, “Modular PFC Hybrid Step-Down Converter Without Current Control Loop in AC-DC Differential Power Processing Applications,” Journal Paper Under Preparation, May 2023.
R. Das, H. P. Le, “Modular PFC Hybrid Step-Down Converter for Direct AC-DC Conversion with Differential Power Processing in Data Centers,” in 13th IEEE ECCE, Vancouver, Canada, Oct 2021.
R. Das, H. P. Le, “Modular Isolated Vertically Symmetric Dual Inductor Hybrid Converter For Differential Power Processing,” in 13th IEEE ECCE, Vancouver, Canada, Oct 2021.
R. Das, H. P. Le, “Fast Control of Multi-Inductor Multi-Output Hybrid (MiMoH) Converter,” Journal Paper Under Preparation, Apr 2023.
R. Das, H. P. Le, “A 20-24V to 1.2-1.8V Integrated Hybrid Converter : Integrated Single Structure for Direct Large Conversion and Simultaneous Multiple Regulated Outputs,” Conference Paper Under Preparation, April 2023.
R. Das, H. P. Le, “Multi-Inductor Multi-Output Hybrid (MiMoH) Converter for Large Conversion Ratio and Multiple Outputs,” Accepted for Lecture Presentation at IEEE APEC 2023.
R. Das, H. P. Le, “Multi Inductor Hybrid Converter Family: Small Signal Analysis,” Journal Paper Under Preparation, Nov 2022.
R. Das, H. P. Le, “Analysis of Capacitor Voltage Imbalance in Hybrid Converters and Inherently Balanced Operation Using Symmetric Architecture,” in IEEE Journal of Emerging and Selected Topics in Industrial Electronics, Jun 2022.
R. Das, H. P. Le, “An Accurate Approach to Calculate and Measure Capacitor Voltage and Inductor Current Levels in Hybrid Converters,” in 2021 22nd COMPEL, Colombia, Nov 2021.
R. Das, J. Celikovic, S. Abedinpour, M. Mercer, D. Maksimovic, H. P. Le, “Demystifying capacitor voltages and inductor currents in hybrid converters” in 2019 20th COMPEL, Toronto, Canada, Jun 2019 [Best Paper Award]
J. Celikovic, R. Das, H. P. Le, D. Maksimovic, “Modeling of Capacitor Voltage Imbalance in Flying Capacitor Multilevel DC-DC Converters,” in 2019 20th COMPEL, Toronto, Canada, Jun 2019
Z. Luo, R. Das, H. P. Le, “Switched Capacitor Inverter as Modular Motor Drivers,” Conference Paper Under Preparation, Jun 2023.
H. M. Pham, R. Das, C. Hardy, D. Kimball, P. Ashbeck, H. P. Le, “Adjustable 4-Level Hybrid Converter for Symbol Power Tracking in 5G NR,” Accepted for Lecture Presentation at IEEE APEC 2023
R. Das, H. P. Le, “Gate Driver Circuits With Discrete Components For GaN-based Multi-Level Multi-Inductor Hybrid Converter,” in IEEE Transactions of Industrial Electronics, Mar 2022.