Browsing Ústav výkonové elektrotechniky a elektroniky by Issue Date
Now showing items 1-19 of 19
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P1-approximation for radiative transfer: application to SF6 + Cu arc plasmas
(De Gruyter Open, 2014-12-01)The objective of the paper consists of a theoretical prediction of radiative heat transfer in arc plasmas of SF6 (sulphur hexafluoride) with various admixtures of copper vapours. As a mathematical tool the P1-approximation ... -
Rotor Design and Optimization of Synchronous Reluctance Machine
(MM publishing s.r.o., 2015-03-11)Svět má bezedný apetit po elektrické energii. Většina této energie je použivána pro napájení elektrických strojů. Díky tomu elektrické stroje reprezentují velký potenciál pro energetické úspory. Synchronní reluktanční motor ... -
Numerical simulation and experimental visualization of the separated cavitating boundary layer over NACA2412
(EDP Sciences, 2015-05-06)Cavitation is physical phenomenon of crucial impact on the operation range and service lifetime of the hydraulic machines (pumps, turbines, valves etc.). Experimental measurement of cavitation is expensive and time consuming ... -
On the Selection of Integration Intervals for the Calculation of Mean Absorption Coefficients
(Springer US, 2015-10-18)In radiation modeling of thermal plasmas non-grey models are applied where the radiative transport is described in several frequency bands (spectral intervals). Hereby mean absorption coefficients have to be calculated by ... -
Spatio-temporal description of the cavitating flow behavior around NACA 2412 hydrofoil
(IOP Publishing, 2015-12-06)Spatio-temporal description of the cavitating flow around hydrofoil with 8 degrees incidence using proper orthogonal decomposition (POD) is presented. POD is a suitable tool, which provides information not only about the ... -
TRIZ already 35 years in the Czech Republic
(Elsevier B.V., 2016-02-10)In this paper the authors summarize the experience of teaching and implementation TRIZ at technical universities and findings from teaching and applications in companies in the Czech Republic and Slovakia for the last 35 years. -
Load Torque Analysis of Induction Machine
(MM publishing s.r.o, 2016-03-08)This paper is focused on the load torque evaluation of the induction machine. There is described the problem of load torque oscillations and its impact to other electromagnetic variables in induction machine. In this ... -
Numerically optimized band boundaries of Planck mean absorption coefficients in air plasma
(IOP Publishing, 2017-08-02)Radiation heat transfer plays an important role in the energy balance of plasma in an electric arc and its accurate prediction is essential for the development of new electrical devices. Unfortunately, a very complex ... -
A Review of Thermal Conductivity of Epoxy Composites Filled with AIN or BN
(IEEE, 2017-08-31)new possibility to improve thermal properties and lifetime of electrical machines is adding some micro- or nano- particles to the epoxy resin and improve the heat dissipation of the machine. This will reduce the temperature ... -
The methodology for endoluminal irreversible electroporation in porcine models
(Acta Veterinaria Brno, 2019-04-23)The aim of this study was to describe the methodology of the surgical technique for endoluminal irreversible electroporation in the biliary tract performed within the perihilar region in porcine models. Endoluminal ... -
Influence of Plasma-Activated Water on Physical and Physical–Chemical Soil Properties
(MDPI, 2020-08-22)Recently, the bactericidal and fungicidal effects of plasma-activated water (PAW) have been confirmed for its application in agriculture. Although the PAW application is beneficial in plant growth, no information is available ... -
Influence of metal vapours on radiation characteristics of air arc plasmas
(ČVUT, 2020-11-18)This paper deals with the evaluation of radiation properties of air arc plasma with various admixtures of Cu, Ag, and Fe, respectively. Under assumption of isothermal plasma cylinder, the net emission coefficients were ... -
Experimental model of occluded biliary metal stent recanalization using irreversible electroporation via a tubular catheter
(Taylor & Francis, 2021-03-07)Purpose To demonstrate the feasibility of irreversible electroporation (IRE) for treating biliary metal stent occlusion in an experimental liver model. Methods and materials IRE was performed using an expandable tubular ... -
Identification of Power BJT Operating Stages Based on Experimental Excess Charge Estimation
(IEEE, 2021-05-12)The paper proposes and demonstrates an experimental waz of estimating the amount of stored charge of excess minority carriers within power BJT base and collector. This consequently allows a detailed identification of ... -
Efficiency optimization of totem pole PFC with Gallium Nitride semiconductors
(WYDAWNICTWO SIGMA-NOT, 2021-06-01)Novel Gallium Nitride wide bandgap semiconductor devices are capable of improving efficiency of power converters. This article presents a practical optimisation of GaN converter application in the totem-pole power factor ... -
Topology Optimization of Rotor Bars Geometry and Arrangement for a Line-Start Permanent Magnet Synchronous Machine
(IEEE, 2021-08-13)An optimally designed line-start permanent magnet synchronous machine may require a different squirrel-cage design than traditional induction machines. The objective of this paper is to apply topology optimization based ... -
Thermal protection implementation of the contact overheadline based on bay controllers of electric transport traction substations in the mining industry
(Saint Petersburg Minin University, 2021-10-29)The article presents the principle of thermal protection of the contact overheadlineand substantiates the possibility of practical implementation of this principle for rail electric transport in the mining industry. The ... -
Compact High-Voltage AC Generator with Pulse Transformer for High-Frequency Irreversible Electroporation (H-FIRE)
(MDPI, 2021-11-23)This paper is focused on a design of a high-voltage (HV) generator, which is proposed for a high-frequency irreversible electroporation (H-FIRE). The generator produces bursts of bipolar symmetrical pulses. Most HV sources ... -
Dynamic Model of Medium Voltage Vacuum Circuit Breaker and Induction Motor for Switching Transients Simulation Using Clark Transformation
(MDPI, 2023-02-01)A derivation of the dynamic model of a medium voltage vacuum circuit breaker and induction motor in space vectors in coordinates 0 allow us to model switching transients in various dynamic states of the motor. In the case ...