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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 222
Entler, Slavomír , Ďuran, Ivan , Simonovský, M. , Řeboun, Jan , Turjanica, Pavel , Šobáň, Zbyněk , Sládek, P. , Viererbl, L.
Antimony Hall sensor testing at ITER and DEMO relevant temperatures

Measurements of the steady-state magnetic field of ITER and DEMO reactors will be performed by Hall sensors that will be part of the magnetic diagnostics. The sensors will contribute to the measurement of the plasma current, plasma-wall clearance, and local perturbations of the mag...

Závorka, Jiří , Lovecký, Martin , Jiřičková, Jana , Škoda, Radek
Experimental verification of new neutron absorbers concepts

The presented paper describes experimental verification of the fixed neutron absorber for VVER-1000 fuel assemblies in the LR-0 zero-power reactor. This research determines the critical state parameters for fuel without these absorbers and for fuel with designed absorbers dedicated to the ba...

Dragoun, Jaroslav , Vinš, Martin , Talla, Jakub , Blahník, Vojtěch
Droop Control Algorithm Design for Power Balancing in Island Inverter Based Microgrid

In this article, a droop control algorithm is proposed for power distribution between sources in an island inverter-based microgrid without common central control. The analyses of the line impedance influence (resistive, inductive, and combined) are provided to show the impact on the po...

Holík, Michael , Ahmadov, F. , Sadigov, A. , Ahmadov, G. , Berikov, D. , Mamedov, Fadahat , Naghiyev, J. , Štekl, Ivan , Sadygov, Z. , Mammadli, A. , Garibli, A. , Urban, Ondřej , Zich, Jan
Gamma ray detection performance of newly developed MAPD‑3NM‑II photosensor with LaBr3 (Ce) crystal

This paper presents the gamma-ray detection performance of the newly developed MAPD-3NM-II type SiPM sensor array (4 [Formula: see text] 4) with [Formula: see text](Ce) scintillator. The gamma-ray spectra of various sources have been measured in the energy range from 26 keV up to&#...

Bělík, Milan , Rubanenko, Olena
Optimisation of passive solar systems seasonal operation in conditions of central Europe

The paper deals with optimisation of passive solar systems installed on family and office buildings in central Europe locations. In these territories, in contrast to more southern countries, it is not typical to utilize passive solar systems on public or private buildings. Although ...

Bělík, Milan , Rubanenko, Olena
Determination PV Module Technical Condition

The paper focuses on the determination of technical conditions and degradation of photovoltaic modules installed in grid-on operated photovoltaic systems in Ukraine and the Czech Republic. Detected malfunctions of PV modules are classified and Fault Tree Analyses (FTA) is created for particu...

Bělík, Milan
Optimisation of energy accumulation for renewable energy sources

This project focuses on optimisation of energy accumulation for various types of distributed renewable energy sources. The main goal is lo prepare charging - discharging strategy depending on actual power consumption and prediction of consumption and production of utilised renewable energy s...

Orosz, Tamás , Pánek, David , Rassölkin, Anton , Kuczmann, Miklos
Robust Design Optimization of Electrical Machines and Devices

The article introduces a Special Issue (SI) of the journal Electronica that contains fourteen chosen articles from robust design optimization of electrical machines and devices. Optimization is essential for the research and design of electro-mechanical devices, especially electrical machines. Finding...

Trnka, Pavel , Trnková, Magdalena
Asset Management of Large Electric Machines through Monitoring of Electric Insulation

Demanding requirements on the circular economy, cost savings, the effectiveness of the power grids operation press the operators of large electrical machines and other equipment to search for new methods of equipment management, maintenance, and renewal. At present, the management of importa...

Ataee-Kachoee, Amir Hossein , Hashemi Dezaki, Hamed , Ketabi, Abbas
Optimal adaptive protection of smart grids using high-set relays and smart selection of relay tripping characteristics considering different network configurations and operation modes

Much attention has been paid to optimizing smart grids (SGs) and microgrids (MGs) protection schemes. The SGs' operation in different operating modes (especially grid-connected and islanded conditions) and various system configurations (such as the outage of each of the distribution generatio...

Gohl, Stefan , Malich, Milan , Bergmann, Benedikt , Burian, Petr , Granja, Carlos , Heijne, Erik H. , Holík, Michael , Jacubek, Jan , Janeček, Josef , Marek, Lukáš , Oancea, Cristina , Petro, Maros , Pospíšil, Stanislav , Smetana, Adam , Soukup, Pavel , Tureček, Daniel , Vuolo, Marco
A miniaturized radiation monitor for continuous dosimetry and particle identification in space

A Miniaturized Radiation Monitor (MIRAM) has been developed for the continuous measurement of the radiation field composition and ionizing dose rates in near earth orbits. Compared to currently used radiation monitors, the presented device has an order of magnitude lower weight while be...

Bergmann, Benedikt , Smolyanskiy, Petr , Burian, Petr , Pospíšil, Stanislav
Experimental study of the adaptive gain feature for improved position-sensitive ion spectroscopy with Timepix2

In the present work, we study the Timepix2 pixels' high energy response in the so-called adaptive gain mode. Therefore, Timepix2 with a 500 μm thick silicon sensor was irradiated with protons of energies in the range from 400 keV to 2 MeV and α-particles of 5.5 M...

Mašek, Bohuslav , Štádler, Ctibor , Červenka, František , Papežík, Miroslav , Svoboda, Jiří , Holota, Radek , Georgiev, Vjačeslav , Skála, Jiří , Khalaj, Omid , Hammerbauer, Jiří
Dlouhá cesta od základního výzkumu k ultravysokopevnému zápustkovému výkovku

In the last two decades, in search for savings, new technologies for steel processing have begun to be developed, which would bring improvements in performance according to the requirements of designers and specific applications. The driving force was the automotive industry, which, in&...

Khalaj, Omid , Saebnoori, Ehsan , Mašek, Bohuslav , Štádler, Ctibor , Hassas, Parsa , Svoboda, Jiří
The Influence of Cooling Rate between Ms and Mf on the Mechanical Properties of Low Alloy 42SiCr Steel Treated by the Q-P Process

A series of experiments was conducted by quenching and partitioning (Q-P) heat-treated alloys to investigate the effect of cooling intensity on the mechanical properties of low alloy steel 42SiCr. By applying a conventional heat treatment, reasonable high strength can be achieved; however,&#...

Blecha, Tomáš , Vlčková Živcová, Zuzana , Farjana, Sonia , Mergl, Martin , Volochanskyi, Oleksandr , Bodnár, Michal , Rous, Pavel , Mizohata, Kenichiro , Kalbáč, Martin , Frank, Otakar
Electrical Contact Resistance of Large-Area Graphene on Pre-Patterned Cu and Au Electrodes

Contact resistance between electrically connected parts of electronic elements can negatively affect their resulting properties and parameters. The contact resistance is influenced by the physicochemical properties of the connected elements and, in most cases, the lowest possible value is required.&#x...

Khalaj, Omid , Ahmadi, Alireza Ayati , Nejad, Sobhan Abedin , Mašek, Bohuslav , Štádler, Ctibor , Skála, Jiří
Evaluation of the Effect of Varying the Angle of Asphaltic Concrete Core on the Behavior of the Meijaran Rockfill Dam

The use of asphaltic concrete cores for sealing embankments and rockfill dams is very important. The self-healing properties of bitumen, simple construction in cold and rainy conditions compared to clay cores, good flexibility and connection with embankment materials are the essential charac...

Kalaj, Patrik , Komrska, Tomáš , Kindl, Vladimír , Čermák, Radek , Frank, Zdeněk , Laksar, Jan , Peroutka, Zdeněk
Multi-Pole Winding Behavior in Multiphase Motors under Current Harmonics Operation

Multiphase machines can be operated in interesting operation modes which are not possible when using their three-phase counterparts. Besides fault-tolerant and multimotor operation, torque enhancement by injecting harmonic currents is another of their very important properties. Torque enhancement by i...

Hlína, Jiří , Řeboun, Jan , Janda, Martin , Hamáček, Aleš
Study of Internal Stress in Conductive and Dielectric Thick Films

This paper is focused on the study of internal stress in thick films used in hybrid microelectronics. Internal stress in thick films arises after firing and during cooling due to the differing coefficients of thermal expansion in fired film and ceramic substrates. Different thermal...

Vilímová, Eva , Peltan, Tomáš , Jiřičková, Jana
Possible implementation of Ex-core measurement in TEPLATOR graphite reflector

An ex-core neutron flux measurement is a crucial system for all common power reactors. It is necessary to monitor the neutron flux and control the chain reaction, therefore the ex-core neutron flux measurement is one of the main safety and control systems. The main advantage&#...

Hammerbauer, Jiří , Štork, Milan
Electronic System for Reduction of Transient Inrush Current in Transformer

This paper introduces a methodology to investigate controlled switching (or "Point on Wave Switching") to reduce magnetizing inrush current in Transformer. When transformer is switched on, transformer will get energized and transiently, large current flows through the primary winding. This&#...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 222