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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 26
Krýsl, Pavel
Konstrukce napěťového střídače pro přední pohon elektrické formule

This article focuses on design and construction of voltage inverter for front traction of electric formula car, built at the University of West Bohemia in Pilsen. Front traction system consists of these two inverters for both electric motors wheels, (one per motor). These parts...

Saberi, Alireza Nemat , Sandirasegaram, Sarvavignoban , Belahcen, Anouar , Vaimann, Toomas , Šobra, Jan
Multi-sensor fault diagnosis of induction motors using random forests and support vector machine

This paper presents a fault diagnosis scheme for induction machines (IMs) using Support Vector Machine (SVM) and Random Forests (RFs). First, a number of timedomain and frequency-domain features are extracted from vibration and current signals in different operating conditions of IM. Then,&#...

Frank, Zdeněk , Štěpánek, Jan , Hruška, Karel
Educational test rig for non-standard electric machines

This paper describes the construction of a test bench usable for testing of non-standard electric machines, i. e. electric machines with non-standard mounting interface, rated speed etc. The test rig is adopted to use a standard induction machine as a load for tested machines ...

Šobra, Jan , Hruška, Karel , Laksar, Jan
Analysis of traction permanent magnet motor with static and dynamic eccentricities

In the paper, electromagnetic and vibration analyses of traction electric machine exhibiting static and dynamic eccentricities is performed. The machine is a highspeed permanent magnet synchronous motor with surfacemounted permanent magnets and double-layer concentrated winding. The machine is intended...

Pechánek, Roman , Veg, Lukáš , Sobotka, Lukáš , Franc, J.
Advantage of redesign of cooling system 40MW synchronous machine

The main goal of this work is in the qualification of temperature changes due to design modifications of the medium-sized turbo generator with the output power 40 MW, ie the temperature distribution of the active parts. The work summarizes of designing a number of changes ...

Čermák, Radek , Kindl, Vladimír , Laksar, Jan , Frank, Zdeněk , Komrska, Tomáš
Nine-phase induction motor with harmonie injection and different winding topology

This paper deals with the injection of higher harmonics in a nine-phase induction machine. The work introduces motor parameters and describes various winding connections possible for nine-phase motor. It also presents higher harmonic components injection strategy and discusses results from finite...

Laksar, Jan , Hruška, Karel , Veg, Lukáš
Analytical calculation of saturation effect on the operation maps of surface-mounted PMSM

Inductance variation with the load can have a significant effect on the operation and control of the machine and it should to be implemented in the analytic design of the machine. In this paper a magnetic equivalent circuit (MEC) method used for the analysis of the p...

Kalaj, Patrik , Čermák, Radek , Frank, Zdeněk , Kindl, Vladimír , Komrska, Tomáš , Laksar, Jan , Peroutka, Zdeněk
Measurement of the effects of higher harmonic injection on nine-phase induction motor

This paper deals with an experimental injection of harmonics to a stator winding of a nine-phase machine. Different combinations of the harmonic components are applied with the optimal magnitudes calculated by a linear programming to maximize exploitation of a magnetic circuit. The theo...

Kalaj, Patrik , Peroutka, Zdeněk , Zeman, Karel , Byrtus, Miroslav
Modeling and optimal control of multi-winding permanent magnet synchronous motor

The main contribution of this paper is design of optimal field oriented (vector) control of a multi-winding permanent magnet synchronous motor. Three variants of vector control structures for the multi-winding synchronous motor are presented in the paper. Each of the presented vector co...

González Teodoro, Jorge Rafael , Kindl, Vladimír , Romero Cadaval, Enrique , Asensi, Rafael
Analysis of skin effect in single wire resistance by finite element methods

Efficiency of the power converters is an important specification that determines their success on the market, being the losses a critical part that influences greatly the operation capabilities of the converter. To analyse with the required precision, the losses of magnetic component, b...

Suchý, Ondřej , Košan, Tomáš , Streit, Luboš
Implementation of control unit for electric drive kart

This paper presents the design of the control unit to be installed in the electric kart and it will control the permanent magnet synchronous motor as well as other peripherals. The control unit contains microcontroller TMS320F28335, analog circuits for voltage and current sensors, ...

Jamshidi, Mohammad , Roshani, Saeed , Talla, Jakub , Roshani, Sobhan
Using an ANN approach to estimate output power and PAE of a modified class-F power amplifier

In this paper, an efficient Class-F power amplifier (PA) is designed, simulated and modeled. This type of amplifier has nonlinear behaviors and uses tuning and controlling harmonics as the most important mechanism to increase efficiency. Feedforward artificial neural network (ANN) model is&#...

Blahník, Vojtěch , Straka, Miloš , Pittermann, Martin
Analysis of multilevel electronic balancer for AC traction substation with PS-PWM

The main goal of this paper is the analysis of an behavior for the electronic balancer of the AC traction substation. This balancer consists of three delta connected multilevel cascade H-bridge converters. The employed phase-shifted pulse width modulation causes the significant decrease ...

Pavlíček, Vladimír , Fořt, Jiří , Pittermann, Martin , Skala, Bohumil
Comparing the low-cost measuring devices for standstill frequency response (SSFR) testing for electric machines

This paper compares the different versions of hardware realization of low-cost device for standstill frequency response SSFR testing. The SSFR testing is a modern method used for testing and parameter identification for electrical machines especially for synchronous machines (high power generator...

Biswal, Pravat , Bhajana, V.V.Subrahman. Kumar , Drábek, Pavel
Novel soft-switching high gain transformerless DC-CD converters without auxiliary switches for renewable energy systems

This paper presents new soft-switching transformerless DC-DC converters without auxiliary switches. The soft-switching operation is achieved with the aid of simple resonant cell, which comprises of an inductor, a capacitor and a diode. In addition to the auxiliary cell, a voltage multiplier&...

Blahník, Vojtěch , Straka, Miloš , Pittermann, Martin
Control of multilevel converter for AC traction substation with power symmetrization unit

This paper describes the control of multilevel converter for substation balancer. The topology of substation with electronic balancer is described. The principle of power symmetrization and reactive power compensation is introduced in paper. Designed control algorithm for independent current control&#...

Jamshidi, Mohammad , Roshani, Saeed , Roshani, Sobhan , Talla, Jakub
A compact low-pass filter with simple structure and sharp roll-off

In this paper a compact low pass filter (LPF) with desirable figure of merit (FOM) and sharp roll-off is designed. The cut-off frequency of the designed filter is 3 GHz. The designed filter has a sharp transition-band of 0.88 GHz, from 3 to 3.88 GHz with correspondin...

Blahník, Vojtěch , Straka, Miloš , Pittermann, Martin
Application of power electronic converter for actual topologies AC traction substation

This paper describes the typical field of power electronic converter in the branch of traction substation. The main attention is paid to problematic of ACtraction substation. This topic is solved here due to the just started conversion from DC-traction system to AC traction system&...

Yanna, Venkata Subba Rao , Bhajana, V.V.Subrahman. Kumar , Drábek, Pavel , Popuri, Madhuchandra
A novel soft-switching bidirectional DC-CD converter for energy storage applications

In this paper, a soft-switching bidirectional DC-DC converter is proposed. In order to achieve softswitching conditions ZVS turn on / ZCS turn off, the auxiliary circuit including a switch, a capacitor, a diode and a small inductor are adapted to the bidirectional converter. T...

Straka, Miloš , Blahník, Vojtěch , Pittermann, Martin
Verification of control behaviour of three-phase voltage-source active rectifier with vector control

This paper is focused on creating a model of vector control of voltage-source active rectifier in MATLAB® software. That model was afterwards implemented to TMS320F28335 microcontroller unit which was used for control of laboratory converter. Results obtained from the simulation and from...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 26