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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 52
Vinš, Martin , Dragoun, Jaroslav , Sirový, Martin
Integration of battery energy storage in thermal power plant

The paper focus on the benefits of close integration of battery based energy storage directly into thermal plants. The attention is paid to use of the energy storage for primary frequency control in cooperation with classical steam turbine control. The model topology of the tu...

Veg, Lukáš , Skalický, Martin , Pechánek, Roman
Tuning of the thermal model of synchronous machine with PM by real measurement

This paper is dealing with the exact measurement and calculation of the equivalent thermal conduction coefficient between the winding and the slot. The main issue is how to describe and solve the thermal conduction coefficient on the handmade wired small machine with a low slo...

Kindl, Vladimír , Laksar, Jan , Skala, Bohumil , Schönfelder, Tristan
Iron losses calculation in non-harmonic power supply

The non-harmonic input voltage waveform becomes more frequent with the increasing interest in the multiphase machines

Pechánek, Roman , Skalický, Martin , Dražan, Jiří
Determinations of stator windings thermal model with various filling factor

The main part of this work deals with the description of the created mathematical model for calculating the magnitude of the thermal resistance of the stator slot winding of an electric machine. The given model is able to perform calculations for several different slot shapes....

Šobra, Jan , Čermák, Radek , Kalaj, Patrik , Komrska, Tomáš
Vibration analysis of a nine-phase induction machine supplied by voltage with harmonics injection

The paper deals with magnetic forces and vibration analysis of a nine-phase induction motor. It is described a method of voltage harmonics injection for reaching either the same amplitude or RMS value of supplying voltage as for the case of supplying the motor using the v...

Janouš, Štěpán , Talla, Jakub , Košan, Tomáš , Peroutka, Zdeněk
Predictive control of induction motor drive with transformer

This paper deals with the control of induction motor drive powered by 3-phase VSI with 3-phase output transformer. The drive configuration using transformer to adjust the voltage level from the converter is common for example in submersive pumps drives or in mining industry where&#...

Jamshidi, Mohammad , Talla, Jakub , Peroutka, Zdeněk
Deep learning techniques for model reference adaptive control and identification of complex systems

Although many mathematical and analytical techniques have been presented to control and identify the dynamic systems, there are vast fields of research needing to be developed and extended through Deep Learning (DL) approaches. In this paper, we try to describe how intelligent controlle...

Hruška, Karel , Dvořák, Pavel
Induction machines efficiency mapping

The paper presents a simple yet powerful method of efficiency mapping of induction machines. The whole calculation process is based on knowledge of induction machine equivalent circuit parameters and approximation of losses based on known dependencies on speed, current and magnetic flux ...

Veg, Lukáš , Pechánek, Roman
Influence of production tolerances and production technologies on the temperature model of a high-speed synchronous machine with permanent magnets

The main aim of this paper is to prove the importance of precision of the manufacturing process during designing and producing the electrical machine. There is made a comparison of several models and shown the dependency on the accuracy of the dimension of the stator core...

Suchý, Ondřej , Janouš, Štěpán , Talla, Jakub , Peroutka, Zdeněk
Torque ripple minimization in PMSM drive with non-sinusoidal back EMF using model predictive control

A conventional field oriented control (FOC) relies on park transform and sinusoidal back EMF, in order to tread harmonic signals as constants. As a consequence, resulting control structure based on linear PI controllers is very simple and well tested. However if the back EMF o...

Skala, Bohumil , Kindl, Vladimír , Šobra, Jan , Laksar, Jan
Current in broken squirrel cage of induction machine

The paper deals with the squirrel cage of an induction motor. Faulty connection between the rotor bar and the end-ring has a fundamental effect on the magnitude of the current of an affecting bar and surrounding bars as well. By the matrix equation is solved the curr...

Skalický, Martin , Pechánek, Roman , Veg, Lukáš
Algorithm for creating of the equivalent thermal circuit for PMSM

Equivalent thermal circuit with lumped parameters is a frequently used method for thermal modeling of electrical machines. This paper presents an algorithm of the modular thermal model for the Permanent Magnet Synchronous Machine (PMSM). Modularity is achieved by separating geometry into sub...

Jamshidi, Mohammad , Roshani, Saeed , Talla, Jakub , Peroutka, Zdeněk , Roshani, Sobhan
A novel filter-based power divider for wireless communication in intelligent transportation systems

Intelligent Transportation System (ITS) is a modern technology aiming to improve traffic management and modes of transport. The Long-Term Evolution (LTE) standard is a suitable protocol for wireless communication systems in new ITS applications due to its high speed capacity. In this pa...

Laksar, Jan , Raab, Zdeněk , Pechánek, Roman
Design of permanent magnet synchronous generator for a wide speed range

This paper deals with the design and testing of the independent permanent magnet synchronous generator (PMSG). Maximal speed of the generator is up to 1100 rpm, but the target of the design consists of the highest speed range where the required output power 200 W is ...

Dragoun, Jaroslav , Talla, Jakub , Blahník, Vojtěch
Experimental evaluation of three-phase voltage synchronization algorithms

This paper shows experimental results for three different methods used for a voltage synchronization to the threephase grid. Tested methods are: traditional phase locked loop using Clarke and Park transformation (SRF-PLL), dual econdorder generalized integrator phase locked loop (DSOGI-PLL) and s...

Skala, Bohumil , Kindl, Vladimír , Byrtus, Miroslav , Pudil, Eduard , Longin, Václav , Křelovec, Zdeněk , Lábadi, Jiří
Ovality and tightening force analysis of large induction machine rotor

The paper describes the measurement of ovality of large induction machine rotor and the calculation of the air gap size along the rotor circumference. Also the withdrawal forces are calculated and the causes for its decline are discussed. The model is assembled and the influen...

Kindl, Vladimír , Ferková, Želmíra , Čermák, Radek
Spatial harmonics in multi-phase induction machine

This paper deals with the analysis of spatial harmonic components in multiphase single or double layer windings. It describes the methodology for magnetic field synthesis in the air gap and verifies the results on a five-phase induction machine using finite element method. The conc...

Frivaldský, Michal , Pavelek, Miroslav , Kindl, Vladimír , Zavřel, Martin
Wireless power transfer system design methodology - analysis, design, verification

The paper briefly discusses simplified proposal of the design methodology, which suites for wireless power transfer system development. For this purpose, the most important aspects related to standards and regulations are initially discussed, while focus is given on automotive segment, i.e. ...

Skala, Bohumil , Kindl, Vladimír , Poláček, Libor , Turjanica, Pavel , Voborník, Aleš , Valenta, Jiří , Bachura, Vojtěch
Design of current sensor for medium frequency operation

The paper proposes design procedure of several types of current sensors. The winding design is analyzed regarding its impact on operational characteristics and evaluated for preferred application. The paper also discusses the measurement results and given frequency characteristic and quality fact...

Votava, Martin , Glasberger, Tomáš , Peroutka, Zdeněk
Multistep MPC of dual inverter for switching losses optimization

A novel control method based on model predictive control (MPC) dedicated to dual inverter (DI) control with minimization of switching losses is introduced. Optimal compromise between switching losses and current tracking error is reached by enlarging of the predicted steps count. The co...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 52