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Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 49
Veisheipl, Karel
Charakteristiky impulzního generátoru v závislosti na typu zátěže

During practical measurements with the impulse generator, time parameters of the lightning-impulse voltage can be affected by test object’s parameters like high capacitance. To quickly ensure that those time parameters are still according to the standards, it is good to support those pr...

Poljak, Ladislav , Drábek, Pavel
Nabíječky trakčních baterií pro elektrická vozidla

In this paper, topologies of chargers of traction batteries for electric vehicles are described. First part is dedicated to possible options for realization chargers for electric propulsion. Pros and cons of those options are mentioned in theoretical chapter. Next part is c...

Jiřinec, Jakub
Měření a sběr dat z indukčních zařízení

This paper describes measuring and cooling system for induction devices. The measuring system is based on National Instuments components. The data measured by developed system will be used for verification of numerical models. The second part is devoted to the example of measuring ...

Hornak, Jaroslav
Diagnostická jednotka PEA pro měření prostorového náboje v dielektrických materiálech

The main aim of this paper is describe development of diagnostic device for space charge measurement which is based on pulsed electro acoustic (PEA) method. The first part of this paper deals with principles of measurement of space charge distribution. Main emphasis is...

Čejková, Anna
Filtrace řepkového oleje vhodným sorbentem

The most important of high voltage transformers is electrical insulating system is electrical insulating oil. The transformer oil is also a carrier of information of the state of the transformer because the degradation influences (temperature, solid contaminants, etc.) are during operation c...

Broulím, Jan
Využití grafických procesorů pro dekódování LDPC kódů

In this paper, the utilization of Graphics Processing Units for parallel LDPC decoding is proposed. The proposed algorithm allows decoding of any irregular LDPC code. The principle of the parallel algorithm is briefly presented, and the performance comparison against serial decoding with...

Navrátil, Jiří
Aerosol Jet® bondování SMD součástek

This paper presents a research focused on Aerosol Jet® bonding of SMD components to flexible substrates. Flexible printed electronics is becoming important fast growing market segment. Contacting technologies of the electronic components are well known for traditional electronics such as solderin...

Šíma, Karel
Návrh a realizace senzorového systému s NFC rozhraním pro monitorování okolních parametrů

The paper focuses on the design and the realization of sensor system that can communicate through the technology NFC/RFID. The first part of this paper focuses on realization of singlechip and multichip sensor system. Singlechip platform measures temperature and multichip platform measu...

Justa, Josef , Hamáček, Aleš
Stanovení magnetického referenčního vektoru a jeho dopady na řešení inverzního problému u MARG senzorů

The paper briefly presents one block of determination rotation from Magnetic, Angular Rate and gravity sensors, the definition of magnetic reference vector. Two methods are discussed and compared deeper.

Pokorný, Jan
Návrh univerzální aplikace pro řízení robotů

This article describes a design of a program for easy robot control and for visualization of available sensors. The ConVis Studio, as the program was called, was designed as a universal application, where a user can choose exactly what he wants to visualize and control. I...

Broulím, Pavel
Synchronizace časových událostí s velmi vysokým rozlišením

The paper describes a technique how to synchronize timestamps from several devices. The method is shown and the measurement system for desired resolution is mentioned. Results proving the functionality are discussed.

Zich, Jan
Bezdrátová autonomní vyhodnocovací jednotka pro sledování parametrů okolního prostředí

Modern trends in electronics tend to massive interconnection and data acquisition. Cooperating devices in such a network are connected into the Internet of Things (IoT). With improving of the living conditions in developed countries, the local environment is more important to many peopl...

Valenta, Pavel
Určení prvků náhradního schématu piezoelektrického transformátoru

A piezoelectric transformer can be described by using an equivalent circuit. This equivalent circuit represents the electrical behavior of a piezoelectric transformer when operates at the resonant frequency. This paper describes the determination of the elements of the equivalent cir...

Novák, Radek
Sběrnice AS-Interface

This paper deals with the AS-Interface communication bus system. The first section discusses the ISO/OSI reference model, bus topologies, channel access methods, encoding and decoding of messages and data security. The following section discusses the proposal of laboratory layout for testing...

Hlína, Jiří , Řeboun, Jan , Hamáček, Aleš
Adheze a pájitelnost TPC substrátů v závislosti na koncentraci kyslíku ve vypalovacím procesu

This paper is focused on an adhesion and solderability measuring of samples prepared by TPC (Thick Printed Copper) technology. The TPC technology is used for power electronic substrate manufacturing. Copper film is screen printed on alumina substrate and fired in nitrogen atmosphere. Ox...

Franc, Jiří
Analýza rotorového ventilačního systému vzduchem chlazeného turbogenerátoru pomocí CFD

This paper describes CFD analysis of the rotor ventilation system with rotor radial ducts punched through rotor winding. Analysis includes calculation of air flow and pressure drop for each duct. Default arrangement of the rotor ventilation is compared to improved arrangement which shou...

Vykuka, Roman , Tesařová, Miloslava
Vyhodnocení vlivu lokálních výroben na výkonové a proudové poměry podél propojených vývodů 22 kV

This paper deals with the evaluation of impact of distributed sources on power and current flows along the 22 kV interconnected feeders fed from different substations.

Šobra, Jan
Vibrace asynchronního stroje buzené jednostranným magnetickým tahem při různých poruchách rotoru

Experimental analyses of squirrel-cage induction machine vibrations under several rotor fault conditions causing unbalanced magnetic pull are carried out in the paper. These fault conditions include dynamic eccentricity, different number of broken rotor bars and one case of fault com...

Laksar, Jan
Numerický výpočet zploštění magnetické indukce ve vzduchové mezeře

In this paper, calculation of one of the parameters affecting the air gap magnetic flux density is described. It is the saturation effect which causes the flattening of the flux density distribution. The flattening is calculated numerically by the application of the no...

Veg, Lukáš
Možnosti zjednodušování teplotního modelu transformátoru pro trakční použití

This article deals with the thermal analysis of traction transformer. The traction transformers are special kind of the transformers. The windings have lots of voltage terminals for various voltage levels and various supply systems. In the article is described the thermal mathematical m...

Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 49