Katedra teoretické elektrotechniky / Department of Electrical Engineering Theory

Kolekce


Recent Submissions

Štork, Milan , Mayer, Daniel
Direct currents in power transformers

The article is devoted to the physical nature of geomagnetism, magnetic storms and methods of predicting their origin and deals with geomagnetic induced currents called GIC (Geomagnetically Induced Currents) and their effect on power transformers. A simplified, single-phase transmission system is...

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...

Kotlan, Václav , Hamar, Roman , Pánek, David , Doležel, Ivo
Model of depositing layer on cylindrical surface produced by induction-assisted laser cladding process

A model of hybrid cladding on a cylindrical surface is built and numerically solved. Heating of both substrate and the powder material to be deposited on its surface is realized by laser beam and preheating inductor. The task represents a hard-coupled electromagnetic-thermal problem...

Behúň, Lukáš , Slobodník, Karel
Harmonic and pulsed eddy current testing methods as tools for surface and subsurface defect evaluation

In most publications eddy current testing (ECT) methods are said to be suitable for surface defects up to several millimeters. This paper aims to evaluate the detection capabilities of eddy current testing based on two examples of modern approach. One of them is a harmonic...