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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 61 až 80 z 396
Prosr, Pavel , Polanský, Radek , Chudoba, V. , Leńczyk, Lukáš
The Effect of Various Flame Retardants on Thermal Properties of Cable Insulation

Cables are used in many areas of industry. Their insulation system is mainly made of polymeric materials, so its flammable properties limit its use. For this reason, flame retardant fillers are added during production to improve heat resistance. Aluminium hydroxide (ATH - Al(OH)3) ...

Kalaš, David , Kadlec, Petr , Pretl, Silvan , Soukup, Radek , Polanský, Radek
Characterisation of Polyurethane Potting Compounds with Semiconductive Coating for Explosive Atmosphere Applications

Electronic devices intended for an explosive atmosphere with a significant concentration of explosive gases, vapours, or dust, must meet strict standards requirements. The essential requirement is low surface resistivity, vital for dissipating static charge from the environment and preventing spark&#x...

Hirman, Martin , Hamerník, Karel , Kalaš, David , Navrátil, Jiří , Moravcová, Daniela , Steiner, František
Real-Life Functional Tests of Conductive Joints of SMD Components on E-Textiles

This article addresses the real-life functional research of electrically conductive joints of SMD components onto the electrically conductive textile stretchable ribbons. The four different connection techniques were used in the research: soldering, electrically conductive adhesive bonding, thermocompression, a...

Hlína, Jiří , Řeboun, Jan , Hamáček, Aleš
Behaviour of printed resistors compatible with thick film copper technology

This paper is focused on printed resistors compatible with Thick Printed Copper (TPC). TPC technology is new prospective technology for the realization of power electronic substrates and can be used as an alternative to conventional Direct Bonded Copper or Active Metal Brazing technolog...

Zedan, Ousama Ahmed Abdalla , Haller, Rainer
Modelling of partial discharge behaviour at DC applied voltage by USING ABC model

The increased application of HVDC components leads, at the same time, to forced usage of Partial Discharge (PD) measurement as an important tool for quality testing and reliability. Current issues are missing relations between the PD behaviour caused by insulation defects and the m...

Hruška, Karel , Dvořák, P.
Simplified Analytical Calculation of PM Machines Magnetic Flux Leakage Factor

The permanent magnets used for generation of magnetic field in permanent magnet machines are placed in more or less magnetically conducting environment – electrical steel and air. This causes leakage of the magnetic flux from its desired path through the air gap. This paper de...

Dražan, Jiří , Laksar, Jan
Estimation of Eddy Current Losses in SPMSM Based on Harmonic Decomposition

Algorithm for evaluating eddy current losses in surface-mounted permanent magnets situated in synchronous machine is discussed in this paper. Whereas variable air gap permeance causing a ripple of magnetic flux density produced by permanent magnets is considered the main source of these ...

Leffler, Jan , Trnka, Pavel
Failures of Electrical Machines-Review

In general, there are many types of electrical rotating machines and transformers within various classes of power range and duty cycles. These machines are operated under either industrial or civil conditions. It is a matter of fact that every machine can eventually fail and b...

Dragoun, Jaroslav , Vinš, Martin , Sirový, Martin
Synchronous Generator Active and Reactive Power Oscilations Reduction by BESS

In the presented paper, we address the threats arising from the negative transient effects in the electrical grid and we propose ways how to decrease their negative effect on the synchronous generator. The proposed solution uses BESS installed in the common electrical node with...

Minich, R. , Kepka jr., M. , Kepka, M.
Assessment of the fatigue life of a city bus

Talla, Jakub , Streit, Luboš , Janouš, Štěpán , Suchý, Ondřej
LQR Control of Input LC filter of a Tram with On-board Energy Storage System

The main traction power converter of a trams is connected to DC trolley wire by input LC filter. The tram input LC filter is almost undamped resonant circuit, which is often loaded by the motor constant torque command. Sources of the input LC filter osc...

Pittermann, Martin , Blahnik, Vojtěch , Straka, Miloš
Model Study of Cooperating Traction Substations at 25 kV Traction Catenary without Superior Power Distribution Control

This paper describes the results of the model study for traction system 25 kV / 50 Hz, which is built on an advanced traction substation with a rail active balancer and phase shifting device. The first part of this paper is described traction substation...

Kehl, Zdeněk , Glasberger, Tomáš , Poláček, Libor
Design of New Generation of Binary IO Card for Modular Microprocessor Control System

A new generation of binary input/output card for a modular control system is introduced in this paper. The primary purpose of the proposed binary input/output card is high integration of the number of 32 binary input and output channels. The individual binar...

Hirman, Martin , Navrátil, Jiří , Steiner, František , Hamáček, Aleš
Higher Temperature Washing of Electrically Connected SMD Components onto the Textile Ribbons

This article addresses the higher temperature washing reliability research of interconnection technique for mounting SMD (surface mounted device) components onto conductive stretchable textile ribbons. It can be concluded that both tested interconnection technologies (i.e. low-temperature soldering and adhesive...

Balabán, Jan , Blecha, Tomáš
Textile Sensor for Skin Hydration Measurement

This paper deals with the design and realization of capacitive textile sensors for skin hydration measurement. Skin hydration level is an important parameter for the healthy condition of the body and is also often used in dermatology and cosmetology. Many commercial devices are kno...

Rostás, Kateřina , Navrátil, Jiří , Soukup, Radek , Moravcová, Daniela
The Influence of Washing Cycles on the Conductive Threads Used in E-textiles

E-textiles and smart textiles have already reached a certain stage of development. Nowadays, smart textiles designed for medicine or sports have been developed to be worn directly on the body, just like conventional textiles. This is the reason, why e-textiles and smart textiles sh...

Michal, David , Janda, Martin , Řeboun, Jan
Analysis and Sintering Optimization of Nanoparticle Paste with High Silver Content

This paper deals with analysis, testing, and process optimization of new nanoparticle silvering paste with high silver content. Specifically, on ceramic substrates with printed conductive patterns created by thick film technology. Sintering is currently one of the most anticipated ways of co...

Rous, Pavel , Pavlozas, Antonios Dionysios , Steiner, František
Influence of PCB Surface Finishes on Intermetallic Compound Growth

This article presents research focused on the intermetallic compound growing under different conditions. The quality of solder joints depends on many factors, one of which is the thickness of the intermetallic layer and its composition. Combination of multiple reflow processes which is ...

Radouchová, Michaela , Suchý, Stanislav , Blecha, Tomáš
Embroidered Flexible Elastic Textile Antenna as Strain Sensor

This paper is focused on the design and testing of embroidered flexible elastic textile antennas for strain sensing based on the evaluation of changes in their electrical parameters. Samples of planar textile antennas for strain sensing were prepared by embroidered technology on elastic...

Janda, Martin , Rostás, Kateřina , Pretl, Silvan , Řeboun, Jan
Method of Connecting Printed and Embroidered Conductive Paths in Smart Textiles

This paper proposes a method of connecting conductive paths realized by embroidering and printing in smart textiles. The embroidering of conductive threads offers great electrical conductivity and the level of integration while technologies of printed electronics offer the realization of fine...

Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 61 až 80 z 396