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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 1 až 20 z 71
Hornak, Jaroslav , Trnka, Pavel , Prosr, Pavel , Michal, Ondřej , Kopřiva, Jiří
The Behavior of Cold-Curing Resin after Thermal and UV Radiation Exposures

Potting compounds are widely used in electrical engineering. One of the distinctive subgroups is the so-called cold-cure potting compounds. These potting compounds are mainly used for mechanical or photosensitive protection and are thus often exposed to extreme conditions due to their nature...

Michal, Ondřej , Mentlík, Václav , Hornak, Jaroslav
Influence of Prolonged Mixing of Silicon Dioxide Nanoparticles on the Electrical Properties of Resin Nanocomposites

In today's world, scientists are focusing on developing new materials that provide lower costs, environmental sustainability or increased capabilities. One way to develop new materials is to modify conventional types already established in industry. An example is the development of composite&...

Siahkamari, Hesam , Jahanbakhshi, Maryam , Lotfi, Saeedeh
New Approach In Designing Hexagonal-Shaped Antenna Based On Area Analysis

In this article, a new method is presented to calculate dimensions of a hexagonal-shaped antenna based on frequency and rectangular-shaped antenna. The frequency responses of the presented antenna are compared with rectangular shape antenna and both antennas are designed at 2.4 GHz. The...

Nikolić, Valentino , Kadlec, Petr , Polanský, Radek , Nishiura, Masayoshi , Hou, Zhaomin
Electrical Strength Tests of a Self-healable Copolymer Based on Ethylene and Anisylpropylene

The paper deals with a novel self-healable polymer synthesized by scandium-catalyzed copolymerization of ethylene and anisylpropylenes. The electrical strength of the material was characterized according to the standard IEC 60243 and was carried out with an AC voltage increase of 1 kV/s...

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...

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...

Siahkamari, Hesam , Jahanbakhshi, Maryam , Lotfi, Saeedeh
New Approach In Designing Hexagonal-Shaped Antenna Based On Area Analysis

n this article, a new method is presented to calculate dimensions of a hexagonal-shaped antenna based on frequency and rectangular-shaped antenna. The frequency responses of the presented antenna are compared with rectangular shape antenna and both antennas are designed at ...

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...

Blecha, Tomáš , Moravcová, Daniela
Methods for the Capacity Increasing of Textile Capacitors

In smart textiles, there is an effort to create electronic elements directly as part of the carrier fabric, where conductive threads are used for their construction. Planar capacitors are electronic components that can be implemented using textile technologies. Their disadvantages are relati...

Janda, Martin , Pretl, Silvan , Michal, David , Řeboun, Jan
Examination of Wet Assembling Methods in Printed Flexible Electronics

This paper examines two methods of assembling electronics SMD components on flexible substrates with low-temperature resistance. As a contact medium for interconnection between component and conductive pattern, conductive adhesive MG Chemicals 8331S-15G or conductive Ag printing paste DuPont PE 874&#x...

Kalčík, Jan , Soukup, Radek
Ultrasonic Welded Textile Thermocouples

This article deals with the problems of fabrication and testing of textile thermocouples. Thermocouples were made by ultrasonic welding of hybrid conductive constantan and copper threads. The embroidered thermocouple samples were realized by a 3-point crossing of threads and a 9-point crossi...

Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 1 až 20 z 71