Searched for: author%3A%22Ahmadi%2C+M.%22
(1 - 13 of 13)
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Ahmadi, M. (author), Shekhar, A. (author), Bauer, P. (author)
Modular Multilevel Converters (MMCs) find increasing applications in medium to high-voltage systems. In such systems, reliability-oriented selection of power electronic switches becomes essential because higher modularity implies an increased number of components. The trade-off between the impact of higher modularity on converter reliability...
journal article 2023
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Kardan Halvaei, F. (author), Ahmadi, M. (author), Shekhar, A. (author), Bauer, P. (author)
EV Fast chargers are crucial to alleviate the driving range anxiety for E-mobility applications. A typical converter load profile consists of a short high-current pulse to rapidly refill the EV battery followed by a cooling-off period once the charging is completed. Power electronic components experience thermal cycles as a result, which can...
conference paper 2023
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Shekhar, A. (author), Rituraj, G. (author), van der Sande, Robin (author), Ahmadi, M. (author), Deshmukh, R.S. (author), Bauer, P. (author), Nougain, V. (author), Lekić, A. (author), Palensky, P. (author)
Reliable Power Electronic Systems (PES) are vital for enabling energy transition technologies of the future. Power hardware-in-the-Loop (PHIL) test bed can be used to validate such systems cost-effectively and time-efficiently. In general, the Real Time Digital Twin (RTDT) is a virtual representation of the PES and its operating environment that...
conference paper 2023
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Ahmadi, M. (author), Shekhar, A. (author), Bauer, P. (author)
Power electronics converters are crucial for power generation, transmission, and distribution. The modular multilevel converter (MMC) is highly valued for its ability to handle high power levels, versatility in reconfiguration, high efficiency through small-capacity submodules (SMs), and robust control capabilities. A failure of a power...
conference paper 2023
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Ahmadi, M. (author), Shekhar, A. (author), Bauer, P. (author)
Power electronic converters (PECs) are workhorses of emerging distribution networks. PEC interfaced grids can function as flexible power corridors facilitating compact and efficient energy exchange between distribution generation, load and storage elements. Introducing adequate Reconfigurability, Modularity, and Redundancy (RMR) in such PEC...
conference paper 2022
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Ahmadi, M. (author), Shekhar, A. (author), Bauer, P. (author)
Power electronics converters will play a crucial role in power grid expansion. Superior advantages offered by MMC make it the most popular candidate amongst various converter topologies. However, due to a large number of components installed within MMC, reliability analysis is an unavoidable task that needs to be carried out to maximize the MMC...
conference paper 2022
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Kosari, A. (author), Ahmadi, M. (author), Tichelaar, F.D. (author), Visser, P. (author), Gonzalez Garcia, Y. (author), Zandbergen, H.W. (author), Terryn, H.A. (author), Mol, J.M.C. (author)
Cerium-based compounds have been studied for decades as non-toxic candidates for the protection of aerospace aluminium alloys (AAs) like AA2024-T3. However, the complex heterogeneous microstructure of these alloys has hindered a thorough understanding of the subsequent stages of corrosion protection provided by this class of inhibitors. Thus,...
journal article 2021
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Mirza Gheytaghi, Amir (author), Ghaderi, M. (author), Vollebregt, S. (author), Ahmadi, M. (author), Wolffenbuttel, R.F. (author), Zhang, Kouchi (author)
In this paper, the growth of optimized vertically aligned multi-walled carbon nanotube (VA-MWCNT) forests by LPCVD method for use in a large-area absorber in infrared detectors is presented. The effect of synthesis temperature (500−700 °C) and time (1−10 min) on the optical absorption coefficient in the infrared (2−20 μm) is investigated by...
journal article 2020
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Aktekin, Burak (author), Massel, Felix (author), Ahmadi, M. (author), Valvo, Mario (author), Hahlin, Maria (author), Zipprich, Wolfgang (author), Marzano, Fernanda (author), Duda, Laurent (author), Younesi, Reza (author)
The crystal structure of LiNi0.5Mn1.5O4 (LNMO) can adopt either low-symmetry ordered (Fd3¯ m) or high-symmetry disordered (P4332) space group depending on the synthesis conditions. A majority of published studies agree on superior electrochemical performance of disordered LNMO, but the underlying reasons for improvement remain unclear due to...
journal article 2020
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Ricciardella, F. (author), Vollebregt, S. (author), Kurganova, Evgenia (author), Giesbers, A.J.M. (author), Ahmadi, M. (author), Sarro, Pasqualina M (author)
A method to grow multi layers graphene (MLG) just by thermal annealing in an inert atmosphere is reported. A molybdenum (Mo) catalyst layer is used in combination with a solid amorphous carbon (a-C) source on top or below the Mo layer. The formation of MLG directly on top of the catalyst substrate surface is confirmed by Raman spectroscopy,...
journal article 2019
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Hashemi Ahmadi, M. (author)
During the recent years, electronic payment methods have become more customary and in cases more preferable. Nevertheless, cash remains a popular form of payment due, inter alia, to its ubiquity. Large use of cash is associated with security issues, investment costs, logistics costs of transport and handling cash, personnel costs, and the like....
master thesis 2013
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Ahmadi, M. (author), Wong, S. (author)
Within packet processing systems, lengthy memory accesses greatly reduce performance. To overcome this limitation, network processors utilize many different techniques, for example, utilizing multilevel memory hierarchies, special hardware architectures, and hardware threading. In this paper, we introduce a multilevel memory architecture for...
journal article 2011
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Ahmadi, M. (author)
In this dissertation, we present several techniques to achieve the high-performance processing in networked and grid environments. Many applications need a high-performance processing system to execute efficiently. High-performance processing mainly stems from parallelism. The parallel nature of grid computing is a very attractive solution to...
doctoral thesis 2010
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