• Design and Development of Power Electronic Converter Topologies
• DC-DC Conversion for Bipolar LVDC Microgrids and Renewable Energy Systems
• Modulation, Control, and Experimental Validation of Power Electronic Converters
• FPGA/SoC-Based Digital Control and Real-Time Simulation of Power Electronic Systems

Babak Rooholahi, Yam P. Siwakoti, Hans-Günter Eckel, Frede Blaabjerg, Amir Sajjad Bahman:
Enhanced Single-Inductor Single-Input Dual-Output DC–DC Converter With Voltage Balancing Capability
In IEEE Transactions on Industrial Electronics, vol. 71, no. 7, pp. 7241-7251, DOI: 10.1109/TIE.2023.3301527, USA, July 2024

Babak Rooholahi, Hans-Günter Eckel:
Advancement of the SI-SIDO Boost-Buck-Boost Converter with Continuous Switching Method for Bipolar LVDC Applications
In Proceedings of 26th European Conference on Power Electronics and Applications, GDR SEEDS France & EPE Association, DOI: 10.34746/epe2025-0064, Paris, France, March 2025

Babak Rooholahi, Hans-Günter Eckel:
Power Loss Analysis of the SI-SIDO Boost-buck-Boost Converter during the Continuous Switching Method
In Proceedings of PCIM Conference 2025; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, pp. 2972-2979, DOI: 10.30420/566541397, Nürnberg, Germany, May 2025

Babak Rooholahi, Hans-Günter Eckel:
Performance Analysis of Si-Sido Boost-Buckboost Converter Under Unbalanced Output Scenarios Using a Continuous Switching Method
In Proceedings of 2025 IEEE Seventh International Conference on DC Microgrids (ICDCM), pp. 1-6, DOI: 10.1109/ICDCM63994.2025.11144704, Tallinn, Estonia, June 2025

Babak Rooholahi, Yam P. Siwakoti, Frede Blaabjerg, Hans-Günter Eckel:
Performance Analysis of A New High Step-Up Boost-Buck-Boost Interleaved Converter for Bipolar LVDC Applications
In Proceedings of 2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe), pp. 1-10, DOI: 10.23919/EPE23ECCEEurope58414.2023.10264547, Aalborg, Denmark, September 2023

Babak Rooholahi, Saeed Peyghami, Amir Sajjad Bahman:
A New Hybrid-Modular Multi-level Inverter with Fault-Tolerant Capability
In Proceedings of 2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe), pp. 1-9, DOI: 10.23919/EPE23ECCEEurope58414.2023.10264676, Aalborg, Denmark, September 2023

Babak Rooholahi, Ralf Salomon:
New Series of Single-Phase Symmetric/Asymmetric Multilevel Inverter Topologies with Reduced Number of Power Switches
In Proceedings of 2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe), pp. 1-9, DOI: 10.23919/EPE21ECCEEurope50061.2021.9570521, Ghent, Belgium, September 2021

Babak Rooholahi:
A New Two-Stage Single-Phase Transformerless Inverter Topology with a Novel DC/DC High Gain Boost Converter and a Three-Level Neutral-Point-Clamped Inverter for Photovoltaic Systems
In Proceedings of 2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe), pp. 1-9, DOI: 10.23919/EPE21ECCEEurope50061.2021.9570598, Ghent, Belgium, September 2021

Babak Rooholahi:
A New Transformerless Single-Phase Eleven-Level Inverter with Reduction of Switches Based on Model Predictive Control Method
In Proceedings of 2nd Global Power, Energy and Communication Conference (GPECOM), pp. 102-107, DOI: 10.1109/GPECOM49333.2020.9248719, Izmir, Turkey, October 2020

Babak Rooholahi, Esmaeil Zangeneh Bighash:
A New Transformerless Configuration for Grid-Connected Photovoltaic Inverters
In Proceedings of 2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe), pp. 1-5, DOI: 10.1109/ISGTEurope.2019.8905528, Bucharest, Romania, September 2019

Babak Rooholahi, Hans-Günter Eckel:
Gleichstrom-Umwandleranordnung zum Umwandeln von elektrischer Energie
German Patent, Assignee: University of Rostock, DE102025109956A1, September 2026

Babak Rooholahi:
DC-DC Umwandleranordnung
German Patent, Assignee: University of Rostock, DE102023100735A1, July 2024

Babak Rooholahi:
Multilevel-Umwandleranordnung zum Wandeln von elektrischer Energie, Verwendung einer Multilevel-Umwandleranordnung, Verfahren und Computerprogrammprodukt
German Patent, Assignee: University of Rostock, DE102022104429A1, August 2022

Babak Rooholahi, Ralf Salomon:
Multilevel-Umwandler zum Wandeln von elektrischer Energie
German Patent, Assignee: University of Rostock, DE102020127328A1, April 2022

• IEEE Senior Member
• VDE Communit