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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 82
Pittermann, Martin , Blahnik, Vojtěch , Straka, Miloš
Model Study of Cooperating Traction Substations at 25 kV Traction Catenary without Superior Power Distribution Control

This paper describes the results of the model study for traction system 25 kV / 50 Hz, which is built on an advanced traction substation with a rail active balancer and phase shifting device. The first part of this paper is described traction substation...

Kehl, Zdeněk , Glasberger, Tomáš , Poláček, Libor
Design of New Generation of Binary IO Card for Modular Microprocessor Control System

A new generation of binary input/output card for a modular control system is introduced in this paper. The primary purpose of the proposed binary input/output card is high integration of the number of 32 binary input and output channels. The individual binar...

Bhajana, V.V. Subrahmanya Kumar , Drábek, Pavel
Improved Non-Isolated Bidirectional DC-DC Converter Assisted with an Active Resonant Network

This paper proposes a new non-isolated bidirectional dc-dc converter (NI-BDC) with an auxiliary resonant network (ARN) that is typically operated in both boost and buck modes. Regardless the direction of power flow, soft-switching capabilities such as zero voltage switching (ZVS) and zero&#x...

Jamshidi, Mohammad , Roshani, Saeed , Talla, Jakub , Sharifi-Atashgah, Maryam S. , Roshani, Sobhan , Peroutka, Zdeněk
Cloud-based machine learning techniques implemented by microsoft azure for designing power amplifiers

Designing power amplifiers based on the demanded power and frequency is one of the challenging processes of circuits design in electrical engineering. This is best understood when it comes to thermal noises and other unwanted agents. This is why the application of cloud-based metho...

Jamshidi, Mohammad , Roshani, Sobhan , Talla, Jakub , Mohammadi, Maryam Sadat , Roshani, Saeed , Peroutka, Zdeněk
A modified branch line coupler with ultra-wide harmonics rejection using resonators and open- ended stubs

In this paper, a modified microstrip branch-line coupler (BLC) at 1.6 GHz is designed and simulated. The proposed BLC consists of open stubs and resonators together. The designed BLC correctly works at the operating frequency and suppresses 2nd up to 13th unwanted harmonics. The&#x...

Rezaei, Mohsen , Talla, Jakub , Komrska, Tomáš , Peroutka, Zdeněk
Four-leg transformer with defined zero sequence impedance for ground fault compensation

Single-phase ground faults are the most common faults in medium-voltage distribution grids. High-impedance grid grounding using a special four-leg transformer is discussed in the paper. The transformer’s zero-sequence impedance differs from positive-sequence impedance and it is designed to compensate ...

Pittermann, Martin , Blahník, Vojtěch , Straka, Miloš
Current topologies of traction substations for 25kV railway electrification

The paper is focused on AC railway traction system 25kV / 50Hz (respectively 60Hz). Currents progress at fields of power electronic allows to use semiconductors converter as a part of traction substations. It brings more advantages for operation modes of TSS (symmetrization, compen...

Brychcín, Jiří , Košan, Tomáš , Peroutka, Zdeněk
Universal balancing method of flying capacitor converters

This paper describes novel method of balancing of multi-level flying capacitor converters. The proposed balancing block is placed behind PWM modulator instead of balancing table and it is independent on type of modulator nor number of levels. The method was simulated in ModelSIM an...

Bhajana, V.V.Subrahman. Kumar , Drábek, Pavel
A novel soft-switching bidirectional DC-DC converter for dual voltage automotive systems

This paper presents a new zero current switching bidirectional DC-DC converter for dual voltage automotive systems. The improved version of hard-switched DC-DC converter with an additional auxiliary resonant network, which is a combination of two auxiliary switches, two resonant inductors and...

Vinš, Martin , Sirový, Martin
Household PV energy balance calculation by monte carlo method

Two different approaches for the calculation of the household photovoltaic (PV) installations energy balance are presented and discussed in this paper. The main methodology is based on the Monte Carlo method is proposed and applied to the case study with the effort to increase ...

Očenášek, Jiří
Parameter calculations for SiC three-phase rectifier

Main focus of this work is to design a three–phase rectifier based on silicon–carbide power diodes. Main part of the article is dedicated do equations which are then used to obtain temperatures of power diode junction based on current, voltage and switching frequency. From the...

Kehl, Zdeněk , Glasberger, Tomáš , Streit, Luboš
Design of universal H-bridge converter for cascaded multilevel topologies

A new universal multi H-bridge converter is introduced in this paper. The main purpose of proposed universal converter is simple testing of modular multilevel topologies as CHB and M2LC topology. The whole converter is designed to fit a standard 2U height 19” rack mount enclos...

Skalický, Martin , Pechánek, Roman , Sobotka, Lukáš , Veg, Lukáš
Impact of number of nodes used in 3D LPTN on the results and computational time of the PMSM validated by FEA and measurement

Thermal analysis is one of the key aspects of electrical machine design. This paper presents an analysis of lumped parameter thermal model (LPTM) of the electrical machine. The paper shows a comparison of the different sizes of thermal models. Different quantities of the thermal&#x...

Straka, Miloš , Blahník, Vojtěch , Pittermann, Martin
Comparison of traction substation topologies for AC 25kV electrical railway

The paper is focused on topologies of traction substations for AC railway traction system especially for 25kV, 50Hz (respectively 60Hz). The current progress of power electronic field of study allows to use semiconductor converters as a part of distribution power grid (i.e. for HVD...

Kehl, Zdeněk , Glasberger, Tomáš , Peroutka, Zdeněk
Design of control strategy for active filter with 5-level CHB topology in delta connection

Active filters are necessary devices in the infrastructure of power grid. The active filters improve the quality of electrical energy. This paper describes design of control strategy for active filter, which uses three delta connected 5-level CHB converters. The proposed control strategy...

Frank, Zdeněk , Laksar, Jan
Detection of interturn short-circuits of e-bike BLDC motor

The interturn short-circuit is one of the most often failures of electric motors which can lead to serious consequences with the irreversible damage of the whole drive. The detection of these short-circuits is a challenging task depending also on the parameters of the winding ...

Suchý, Ondřej , Janouš, Štěpán , Talla, Jakub , Peroutka, Zdeněk
Predictive control of PMSM using improved model of the drive

The most common control algorithms for PMSM are based on simplified interpretation of the mathematical model, assuming strictly harmonic signals and linear distribution of the magnetic flux of permanent magnets in the air gap. Nevertheless neglected phenomenons in the mathematical mode leads...

Gonzalez-Teodoro, Jorge Rafael , Kindl, Vladimír , Frivaldsky, Michal
Different eddy current effects study for circular windings based on finite elements

The calculation of the winding's series resistance is complicated, especially when high frequency and geometrical effects like the skin-, the proximity, or the current-loop effect can affect the electromagnetic field inside the wire. Finite element analysis (FEA) can calculate any electromagn...

Janouš, Štěpán , Talla, Jakub , Košan, Tomáš , Peroutka, Zdeněk
FPGA-based real-time HIL simulator of permanent magnet synchronous motor drive

In a real-time control systems, reliability plays a key role. This topic is closely related to a control algorithm design as well as its effective implementation. The In the Loop testings such as Model In the Loop (MIL), Software In the Loop (SIL), Processor In the L...

Jamshidi, Mohammad , Talla, Jakub , Peroutka, Zdeněk , Roshani, Saeed
Neuro-fuzzy approaches to estimating thermal overstress behavior of IGBTs

The Thermal overstress behavior of power semiconductor components is a determining factor to evaluate the reliability and performance of power electronic devices. Many theoretical and empirical methods have been presented to address the thermal effects of power electronics components on the ...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 82