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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 116
Očenášek, Jiří , Bednář, Bedřich , Tyrpekl, Miroslav , Michalík, Jan , Košan, Tomáš
Design of Two-Channel LED Stand-Alone Solar Lamp Driver Prototype for Biodynamic Application

This paper deals with design of LED driver as a part of an efficient solar-powered streetlamp based on biodynamic lighting. The contribution of this paper is experimental verification of the designed solution in form of a fully functional battery powered SSLS prototype.

Skalický, Martin , Pechánek, Roman , Sobotka, Lukáš , Veg, Lukáš
Thermal Models of Various PMSM Rotor Topologies

This paper presents analytical thermal models of 7 different rotors with permanent magnets, which are used as sub-models in universal thermal management software, which is currently being developed at our university. Whole software is created as script in MATLAB interface and is based&#...

Štengl, Josef , Komrska, Tomáš , Talla, Jakub , Peroutka, Zdeněk
Modular STATCOM for compensation of reactive power and voltage asymmetry in medium-voltage distribution power grids

A cost-effective STATCOM is proposed and discussed in this paper. Its modular topology enables to scale the power to target systems. Besides reactive power, the proposed STATCOM enables to generate a zero-sequence component and compensate the voltage asymmetry, e.g., in widely spread me...

Bednář, Bedřich , Očenášek, Jiří , Tyrpekl, Miroslav , Michalík, Jan , Košan, Tomáš
Concept of Solar Street Lighting with Hexagonal Solar Panels

In this paper, a comparison of flat and hexagonal solar panels is provided. Furthermore, charging using MPPT algorithm is described and its properties in basic tests are analyzed. The end of the paper deals with the description of the designed solution of the street lighting&#...

Janouš, Štěpán , Suchý, Ondřej , Talla, Jakub , Peroutka, Zdeněk , Košan, Tomáš
Predictive control of induction motor fed by LC filter and transformer

This paper deals with the design of control algorithm for induction motor drive with the transformer and input LC filter. Such drive configuration is often used for drive of submersible pumps or in the testing facilities, where the transformer enables to adapt the voltage rang...

Dragoun, Jaroslav , Talla, Jakub
Real-time Algorithm for the Transformation of Multiple Harmonic Unbalanced Voltages into Symmetrical Components

The Fortescue theorem is a well-known transformation technique for parameter identification in three-phase systems. It is a valuable tool that transforms an unbalanced system into symmetrical components. This method itself can not be used in a real-time system because it needs to identi...

Pittermann, Martin , Straka, Miloš , Blahník, Vojtěch
Variants of Advanced Railway Balancer with Phase Shifting Device for 25 kV / 50 Hz Traction Substation

The paper compares the variants of the traction substation TSS (especially to modular variants with the module of electronic railway active balancer - RAB combination with the phase-shifting device - PSD). The PSD allows to TSSs cooperation with the ability to control the TSSs ...

Otýpka, Jan , Pechánek, Roman , Frank, Zdeněk , Pečínka, Pavel
The Tool for Losses Analysis of Induction Motor Fed by Conveter PWM

This paper summarizes the technical approach of losses resolution in the Induction Motor (IM) supplied by Pulse Width Modulation (PWM) of the nonharmonic deform converter voltage. The main aim is to get the total motor losses which can be separated on the fundamental harmonic ...

Tyrpekl, Miroslav , Zavřel, Martin , Kindl, Vladimír
Comparison of active and passive battery balancing

The presented BMS is universal and can be used for most applications using a combination of 15 LiFePo4 type accumulators, which are the most often accumulator type in home battery storage systems. Therefore, the presented system is intended for home battery storage by default. ...

Laksar, Jan , Dražan, Jiří
Finite Element Calculation of Inductances of Internal Permanent Magnet Motors

Increasing power density and torque capability of permanent magnet synchronous machines can be achieved by a specific design of the rotors. The consequences of the complicated rotor structure are often the strong dependency of the inductance on the electric loading of the machine. ...

Jamshidi, Mohammad , Ebadpour, Mohsen , Moghani, Mona Malekzadeh
Cancer Digital Twins in Metaverse

The Metaverse is an emerging technology to make virtual environments for users to benefit from a huge number of virtual services, while users experience immersive interactions with the real world. Digital twins, which are representatives of assets in this virtual world, play an imp...

Čermák, Radek , Dražan, Jiří , Laksar, Jan , Hruška, Karel
Multiphase winding analysis methodology

This paper is focused on electromagnetic properties of multiphase windings. Different analytical methods for determining magnetomotive force distribution along the machine’s circumference are investigated. Necessary conditions and usefulness of these methods in description of multiphase machine’s behavior are&#...

Vinš, Martin , Dragoun, Jaroslav , Kalaj, Patrik , Sirový, Martin
Turbomachinery Mechanical Oscillations Analysis and Active Compensation Design by EESS in Thermal Power Plant

There are analyzed a turbomachinery mechanical oscillations which are excited in the synchronous generator caused by electrical transients in the electrical grid. The higher voltage harmonics and interharmonics affecting the mechanical stability are identified and discussed. Then, there is presented&#...

Ebadpour, Mohsen , Talla, Jakub , Jamshidi, Mohammad , Peroutka, Zdeněk
EKF Digital Twinning of Induction Motor Drives for the Metaverse

This paper presents a feasible state estimation of speed sensorless rotor field oriented controlled induction motor (IM) drive based on an accurate Extended Kalman Filter (EKF) digital twin model. Digital Twin is one of the attractive trends for the drive industries which provides ...

Laksar, Jan , Čermák, Radek , Dražan, Jiří
Comparison of Five-Phase Winding Configurations of High-Speed PMSM Feasible to the Third Harmonic Current Injection

The optimization of the geometry of an electrical machine is a complex task with many degrees of freedom. The biggest challenge is the optimization of the stator including the number of slots and winding design. Therefore, the magnetic saturation of the stator is fixed, and&#x...

Paveza, Tomáš , Dražan, Jiří , Čermák, Radek
Design of a Double Rotor BLDC Motor with Halbach Array Magnets

This paper is focused on a design and simulation of a 3D printed double rotor machine using Halbach array permanent magnets. This machine’s is supposed to be a learning tool for demonstration of behavior and properties of electrical machines’ magnetic field. Design of this mac...

Kehl, Zdeněk , Glasberger, Tomáš , Peroutka, Zdeněk
Predictive control of a multilevel active filter and compensator

This paper describes an active filter with three 9-level cascaded H-bridge converters in the delta connection. The control strategy of the proposed active filter is based on a finite control set model predictive control with the support of PQ theory, which analyzes the power g...

Sobotka, Lukáš , Pechánek, Roman , Skalický, Martin , Veg, Lukáš
Thermal and Ventilation Analysis of PMSG with a Radial External Fan

This article focuses on the thermal model of a synchronous generator with permanent magnets and external ventilation. The model was made in the commercial software Ansys Fluent. The model is validated by measuring a real machine. For this purpose, three heating tests with different...

Zavřel, Martin , Kindl, Vladimír , Tyrpekl, Miroslav
Analysis of Wireless Power Transmission System Behavior for Various Compensation Topologies

This paper presents wireless high-power transfer application in wireless chargers for electro mobility, cordless tools e.g.. It discuses mutual influence of rectifiers and wireless power transfer coupling elements in various compensation topologies. The basic and derived topologies are discussed toget...

Krýsl, Pavel , Jára, Martin , Peroutka, Zdeněk
High-frequency full-bridge LLC resonant inverter with GaN HEMT

In this paper, the development of a compact LLC resonant converter based on GaN devices and with output power up to 10 kW is described. The capability of 1 MHz operation contributes to small overall dimensions involving the power stage, drivers and also the control system...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 116