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Collection's Items (Sorted by Submit Date in Descending order): 1 to 19 of 19
Kaska, Jan , Orosz, Tamás , Karban, Pavel , Doležel, Ivo , Pechánek, Roman , Pánek, David
Optimization of reluctance motor with printed rotor

A novel way of optimizing a reluctance motor with rotor manufactured by 3D printing technology is presented. The optimization algorithms must take into account the tolerances of its production that are generally higher compared with classical processing, which requires a high level of&#...

Mach, František , Pospíšil, Karel
Uncertainty quantification for real-time operation of electromagnetic actuators

Juřík, Martin , Šmídl, Václav , Kuthan, Jiří , Mach, František
Trade-off between resolution and frame rate for visual tracking of mini-robots on planar surfaces

Štork, Milan , Mayer, Daniel
Modified tellegen principle used for power and energy systems modeling

Pihera, Josef , Hornak, Jaroslav , Voborník, Aleš , Kupka, Lukáš , Chládek, Svatoslav , Haller, Rainer
Partial discharges pulse shape analysis at AC and DC

Partial discharge (PD) signal analysis is a well-known tool for monitoring the conditions of insulation systems of electrical machines and equipment. Classical analyzes of PD are mostly based on the eval- uation of the phase angle of the test voltage at which partial discharges...

Petrášová, Iveta , Kotlan, Václav , Doležel, Ivo
Adjustment of material characteristics in electroheat problems

A frequent difficulty occurring in solving electroheat problems is correct setting of the temperature-dependent material characteristics. These are well known in the case of the pure metals, but not so much for alloys, as they depend on their chemical compositions. The paper presents&#x...

Muška, Jiří , Karban, Pavel , Petrášová, Iveta , Doležel, Ivo
Design of linear peristaltic pump

A linear peristaltic pump is designed and modeled. The pump is controlled by a set of five electromagnetic actuators with ferromagnetic cores pressing in the given order an elastic tube with pumped liquid. The paper shows and describes the basic arrangement of the device, pres...

Benešová, Zdeňka , Haller, Rainer , Hamar, Roman , Martínek, Petr , Müllerová, Eva , Summer, R.
Some issues related to impulse testing of gaseous insulation with synthetic air

Impulse testing procedures are commonly used for various investigation of high- voltage insulation. Especially for introduction of new type of electrical insulation, like ecofriendly gases alternative to SF6, the statistical behavior of breakdown voltage should be evaluated. The paper deals with&...

Juřík, Martin , Kuthan, Jiří , Vlček, Jiří , Mach, František
Positioning uncertainty reduction of magnetically guided actuation on planar surfaces

Key design and operation parameters of the system for magnetically guided actuation of miniature robots on planar surfaces are analyzed and discussed. The study is carried out on the numerical analysis and also on the experimental measurement on the prototype of the system. Special...

Taylor, Stephen , Brychcín, Tomáš
The representation of some phrases in Arabic word semantic vector spaces

Design of electrical machines with low carbon footprint is an actual topic in the industry. Total cost of ownership is the standardized methodology to consider the lifetime costs of a power transformer already in the pre-concept design stage. There still does not exist a widel...

Kroupa, Tomáš , Zemčík, Hana , Zemčík, Robert
Micromechanical analysis of fiber spatial distribution influence in unidirectional composite cross-section on overall response in terms of tensile curves

Accurate temperature control is an important part of an induction brazing process, because of a small difference between melting points of aluminum and soldering material. However, direct measurement of the local temperature at the spot of brazing is not possible in a production li...

Kotlan, Václav , Hamar, Roman , Doležel, Ivo
Induction heating-assisted laser welding of stainless cylindrical pipes

A 3D model of induction-assisted laser welding of stainless cylindrical pipes is presented, incorporating two physical fields: magnetic field and temperature field in the welded pipe that influence one another. The model is solved in quasi-coupled formulation using software COMSOL Multiphysics&#x...

Petrášová, Iveta , Karban, Pavel , Pánek, David , Šroubová, Lenka
Shape and topology optimization of high power converter busbar

The paper is divided into two parts. In the first section the paper deals with shape optimization of high-power converter busbar. The second section is focused on the topology optimization which was applied on the busbar. The main goal of the optimization is to ensure tha...

Pospíšil, Karel , Mach, František
Využití indukovaného napětí pro detekci chyby operace elektromagnetického ventilu

The aim of this article is to describe a method for the sensorless fault detection of the electromagnetic valve operation. This method is based on the measurement of the voltage induced in the valve coil.

Petrášová, Iveta
Optimalizační metody pro lokalizaci zdroje hluku

Optimization methods are used for solving problem in a large number of disciplines. This paper deals with the use of optimization methods for localization the known noise source. The calculation was performed using several optimization methods. The localization of the noise source is&#x...

Pavec, Martin , Soukup, Radek , Hamáček, Aleš
Fraktální anténa vyrobena technologií vyšívání a Aerosol Jet

This paper presents a research focused on development of a flexible fractal antenna for wearable IoT applications or smart textile optimized for Ultra-Wideband communication. A bowtie pattern was chosen as design of the flexible antenna, which is prepared by two technologies: aerosol je...

Kuthan, Jiří , Juřík, Martin
Klíčové parametry pro polohování magnetických těles v planární rovině

Presented research is focused on key design parameters of the system for magnetically guided actuation of miniature robots on planar surfaces. Attention is paid to field coils and robot design, maximum robot load and robot dynamics. The study based on the numerical analysis and...

Slobodník, Karel
Návrh a počítačové modelování pulzně buzených defektoskopických sond na bázi vířivých proudů

In this paper, design and finite element modeling of different types a pulsed eddy current defectoscopy probes is presented. Influence of dimensions of artificial crack in examined body consisted of silver solder on output signal is investigated. Numerical solution was carried&#...

Chudáčik, Vladimír , Smetana, Milan , Karban, Pavel
Formovanie magnetického poľa vo vodivom biomateriály v dôsledku deformácie

In this paper, the impact of plastic deformation of conductive biomaterial on magnetic field formation is described. Austenitic stainless steel specimens after plastic deformation are investigated by non-destructive way under same conditions. Weak magnetic fields are measured using fluxgate sensor.&#x...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 19 of 19