Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
The paper provides an overview of the modern field simulation techniques available to assist in the design and performance prediction of electromechanical devices, including electric motors. Commercial software, usually based on finite element or related techniques, is already very advanced and provides a reliable tool for every-day use in the design office. At the same time Computational Electromagnetics...
The paper presents the finite element method applied to eddy current problems in electrical machines and actuators. Both scalar and vector potential formulations are analysed. The nodal element and edge element methods are considered. The finite element equations are expressed using the notion of equivalent magnetic and electric networks coupled via sources. The presented network models contain branches...
Fuel cell power conditioning systems consist of one or several voltage converters as well as energy storage devices. For generation of required voltages and controlled energy transfer appropriate converter topologies are necessary. Low-voltage power MOSFETs often can be used as switching devices for such converters. Possible ways of utilisation of low-voltage MOSFETs in different topologies and the...
High resolution optical encoders are used in industrial servo drives with position and/or speed control for providing the respective feedback signals. In applications with lower accuracy requirements resolvers are used as feedback sensors with respect to lower cost. As a resolver is nothing else than an electrical AC machine of special design, there is the basic idea to operate the servo motor itself...
The paper starts with overview on needs and skills required by the engineers working in the mechatronic system environment, with special attention to the automotive and associated industries. After brief presentation of the background and courses in field of Mechatronics at the TU Kosice the paper show philosophy of the supporting web based interactive modules supporting the courses. They were developed...
The paper presents integrative approach for educational power electronics laboratory, where measurements and simulations are equally used in laboratory exercises. Hardware and software part of laboratory are described, with typical examples deeply explained. Te best properties of measurement and simulation are used to reach final goal ?? better understanding of power electronic circuit behavior. Proper...
In the paper a Web based teaching of Pulse Width Modulaiton (PWM) methods for three-phase bridge converters is presented. In the first part the basic methods of PWM: carrier based sinusoidal (CB-SPWM), carrier based PWM with zero sequence signal (CB-ZSS-PWM), and space vector modulation (SVM) are discussed. Special emphasis is given to relations between CB-ZSS-PWM and SVM. In the second part selected...
Industry lacks researchers, developers and service engineers in the whole area of Electrical Power Engineering. However, graduates do not emerge automatically from universities or technical colleges. The critical age is less than 14 years when the path to the future profession is selected. We have to provide sufficient information for that decision and also encourage kids to have active contact with...
This work deals with speed estimation in electric drives that include a Permanent Magnet Stepper Motor. On the one hand a nonlinear observer is designed, whereas on the other hand the rotor speed is estimated by using the dirty derivative from the measured position. By assuming model uncertainty and noisy measurements a comparison from the robustness point of view is presented. Advantages and disadvantages...
This paper describes AREVA T&D effort to develop a economically attractive VSC solution based on the IEGT. Its wide Safe Operating Area (SOA), leads to the elimination of anode reactance and a significant reduction in the size of snubbing components. These features combined with the simplified gate voltage control, self limiting current capability and reduction in the size of protection circuitry...
Virtual and distance laboratories extend the application area of the Web, which leads to an openly integrated environment for sharing teaching and learning materials and hardware and software resources. In this paper distance learning and in particular the experiments are investigated. DelftWebLab for a practical experience in power electronic education is designed as a project with leading idea and...
Power electronics based power systems are being increasingly considered for transportation systems such as land, sea/undersea, air, and space vehicles due to their advantages in efficiency, performance, flexibility, and power density. In order to have superior performance, these multi-converter systems need to be rigorously regulated. Dynamic response of tightly regulated power electronic converters...
This paper describes a research of maintenance system and development of new control and operation diagnostics of KT4 type trams in Tallinn (Estonia). System operation modes and diagnostic methods were studied during hard and software development of trams. Also it gives a short overview of used methods, integrations problems and profitability calculation
This paper presents electronic ballast that can supply five independent high press sodium lamps. The main contributions are as the follows: Half-bridge topology is used, putting one LCC out filter to each lamp of the ballast, parallel distributed between both switch, frequency sweep method was used to start up the five lamps. It is possible to supply any numbers (<5) of lamps. A lighting system...
The present paper deals with the in-depth experimental analysis of PMSM considering the motor design solution for an electric assisted active steering system as a case study. The experimental motor and the complete laboratory set-up including the power electronic, motor control and measurement devices are presented. A comprehensive measurement procedure will be described and the measurements results...
The elemental structure arising from the continuous autonomous switching of two linear systems is considered. After introducing certain canonical forms, some analytical results about limit cycle bifurcation are reported, showing that such systems generically exhibit a jump transition to oscillating behavior. Explicit expressions for quantitative characteristics of the periodic oscillation are obtained...
In this paper, a vector-controlled induction motor drive with efficiency optimization using a loss model based approach is presented. To improve the robustness of the control system, a self-tuning controller has been designed. On-line estimators for rotor resistance and magnetizing inductance are included in the controller to improve performance. Analysis, modeling and simulation results are presented...
A special four-level three-phase diode clamped inverter fed by a correspondingly adapted untypical three-phase rectifier with two typical transformers is presented. The three-level rectifier is formed by consecutive connection of three rectifiers under the circuit of Scott for the bi-phase orthogonal voltage received from corresponding windings of two three-phase transformers. The inverter is realized...
Soft switching full-bridge phase-shifted PWM converter using IGBTs with auxiliary transformer is presented in this paper. Zero-voltage and zero-current switching for all power switches is achieved for full load range from no-load to short circuit by adding active energy recovery snubber and auxiliary circuits. The principle of operation is explained and analysed and experimental results are presented...
Most of nonlinear analysis techniques used for studying the stability of power electronics systems has been applied to particular cases such as the buck converter under voltage mode control, boost converter with current programmed control, etc. This is due to the inherent complexity of the mathematical description of such systems in spite of their topological simplicity. In this paper, we extend the...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.