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Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 46
Kotlan, Václav , Karban, Pavel , Doležel, Ivo
Induction clamping of high-revolution tools by rotation in a system of unmovable permanent magnets

An alternative way of induction clamping is described, consisting in heating of the sleeve by its rotation in static magnetic field generated by suitably arranged permanent magnets. The most important dimensions of the heating system are optimised with the aim to reach the required...

Blahník, Vojtěch , Košan, Tomáš , Talla, Jakub
Electromagnetic interference of single-phase AC-DC traction converter

The main goal of this paper is to analyze a low harmonic interferences of ac-dc traction converter and the influence of selected signals. In this case, the ac-dc converter is based on H-bridge topology. This type of converter is important part of a majority modern ac ...

Šobra, Jan , Kavalír, Tomáš , Křížek, Michal , Skala, Bohumil
Experimental verification of the finite element analysis of an induction machine with implemented static eccentricity fault

The paper deals with the experimental verification of vibration frequency spectra of squirrel-cage induction machine having implemented static eccentricity fault. The measured data are compared to the theoretical presumptions and the transient finite element analysis of the measured machine. Measureme...

Košan, Tomáš , Talla, Jakub , Janouš, Štěpán , Blahník, Vojtěch
FPGA - based accelerator for model predictive control of induction motor drive

The model predictive control is a set of algorithms which uses the dynamical model of controlled system to predict the future systems responses. Nowadays, the nonlinear finite control set model predictive control (FCS-MPC) is a popular technique for control of induction motor drives.&#x...

Janouš, Štěpán , Talla, Jakub , Šmídl, Václav , Peroutka, Zdeněk
Model predictive control of dual induction motor single inverter drive

Dual induction motor single inverter drives reduce installation space, weight and overall cost. On the other hand, complexity of the control increases significantly, since the condi­tion on each electric machine can vary in a wide range. Today, majority of control algorithms uses cascad...

Streit, Luboš , Talla, Jakub , Janda, Martin
Tram LC filter stabilization by supercapacitor storage system

The paper is focused on the tram input LC traction filter stabilization by the super capacitor energy storage system. The input LC filter is almost undamped resonant circuit connected on the both sides to the sources of disturbances. On the input side, LC filter is connec...

Pechánek, Roman , Kindl, Vladimír , Franc, Jiří
Different approach in thermal modeling of permanent magnet synchronous motor

This work deals with different methods of thermal modelling of the stator winding in a slot. The analyzed machine is a permanent magnet synchronous motor (PMSM). The simplified lumped thermal model and model parameters are described. The finite element methods model is set up ...

Pittermann, Martin , Fořt, Jiří , Diesl, Jan , Pavlíček, Vladimír
Converters for switched reluctance motor - topology comparison

The paper deals with the comparison of SRMconverter topologies, focusing on comparing the number and the dimensioning of semiconductor elements for the medium power engine (from approx. a hundred watts to tens of kW). The paper considers basic well-known configurations (e.g. an asymmetr...

Votava, Martin , Glasberger, Tomáš
Návrh tepelného modelu měniče a identifikace jeho parametrů

The paper is focused on a thermal model identification of power semiconductor module for estimation of junction temperature of the semiconductor elements (transistors). The model describes differences between converter baseplate temperature and temperature of each transistor in the module. The th...


Přehled perspektivních technologií akumulace energie

The most promising technologies of energy accumulation for energy storages are mentioned in this paper. There are pumped hydro storages, compressed air energy storages, thermal energy storages and battery energy storages. These technologies are described by their principles and operational charac...

Veg, Lukáš
Vliv tepelné vodivosti v axiálním směru na celkový tepelný model vysokorychlostního PMSM

The subject of presented paper is research of impact on the change of thermal conductivity of stator lamination of high synchronous machine in axial direction. The thermal model of PMSM is calculated for different values of thermal conductivity in axial direction. The results are&#...

Ševčík, Jakub
Stochastický simulátor spotřeby parciálního trolejbusu – srovnání kalibrace

In this paper, a mathematical model for a prediction of energy consumption of electric buses or hybrid trolleybuses is briefly presented and two different approaches for a calibration of the model are discussed. A comparison of differently calibrated simulators is performed on the ...

Laksar, Jan
Použití Schwarz-Christoffelovy transformace ve výpočtech elektrických strojů

One of the methods additional to finite element analysis is presented in this paper. The Schwarz-Christoffel (SC) transformation was used to the Carters factor derivation. Today, the numerical SC transformation is used to describe the air gap magnetic field and evaluate the back EM...

Kroneisl, Michal
Nastavení parametrů prediktivního řízení pro potlačení elektromagnetického hluku pohonu

This paper shows how to tune control algorithm of electric drive to reduce its electromagnetic noise. The used algorithm is based on FCS-MPC (Finite Control Set – Model predictive control) and it employs filters for spectrum shaping. The algorithm is implemented, measured and compa...

Krejčí, Vít
Inovace lineárního posuvu fotoaparátu

This project is based on the first type of linear camera slider which makes several improves of construction and directions option of camera motion. Design of mechanical construction is focused on weight with a strong emphasis on the solidity of the rails line. The primary...

Kehl, Zdeněk , Glasberger, Tomáš
Tříúrovňový výkonový měnič NPP

A topology of a three level neutral point piloted (NPP) is described. There are some interesting features e.q. lower switching and blocking voltages in comparison with 2L-VSC topology or soft switching of bidirectional switch, if the special PWM modulator is used. The main disadvan...

Kalaj, Patrik
Modelování elektromechanické interakce v pohonu – vliv měření otáček na hřídeli převodovky pohonu při regulaci rychlosti

The paper deals with creating of complex model covering both electrical and mechanical models of the drive and their mutual interaction. High-speed PMSM machine is used along with 3-stage reduction gearbox. The mechanical model takes into account torsional vibration only. The complex mo...

Glac, Antonín
Optimální řízení IPMSM s uvažováním statorového odporu

This paper presents the implementation of feedforward optimal control of interior permanent magnet synchronous machine (IPMSM), where stator resistance is not neglected. Proposed method improves the efficiency of a drive.

Frank, Zdeněk
Návrh a konstrukce synchronního soustrojí

The paper deals with a complete manufacture of a synchronous machinery for educational purposes. The main targets of the design is creation of a machinery which clearly shows all constructional components of used machines, its overall dimensions allow easy transportation between education&#x...

Dragoun, Jaroslav
Elektrická výzbroj sportovního trenažeru

This paper describes development of stationary bike, which is able to produce and store electrical energy. Device consist of BLDC motor, used as generator, connected to stationary bike and power electronics managing the flow of the energy. Electrical energy from the generator can b...

Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 46