JUEE Tom 10 Zeszyt 1 2004

Critical Evaluation of Resonant DC Voltage Link Inverters for Electrical Drives

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Sławomir Mandrek, Piotr J. Chrzan

This paper deals with modeling and simulation of resonant dc voltage link inverters for electrical drives applications. Different types of active clamped, parallel and quasi-resonant dc link structures are compared. Vis-a-vis contradictory objectives, selective and compromise evaluation is given...

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Voltage Source Power Line Conditioners

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Ryszard Strzelecki, Grzegorz Benysek, Marcin Jarnut, Emil Kot

The paper presents a different way for a power quality conditioning. The different way means parallel connection of the sinusoidal voltage source with the network, therefore it is possible to "isolate" load from source and vice versa. Described conditioner makes possible to get...

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Overview of Class E Inverters

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Zbigniew Kaczmarczyk

A low-order Class E inverter family is the subject of consideration. The paper contains: the general definition of Class E switching conditions, the systematic classification of Class E inverter family members (e.g. into inverters with zero-voltage-switching and zero-current-switching, symmetric and asymmetric configuration...

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Estimation of Supply Lines Impedance in Low-ohmic Furnaces Using Numerical Method of Elementary Conductors

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Pavel Novák, Josef Janoščik, Dušan Medveď

This article deals with another exhibition of possible using numerical method of elementary conductors. It is applied in the course of analyze impedance relations of one and three phases supply lines to low-ohmic furnaces, in configurations of single and bundled lines...

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Power Electronics in Power Plants

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Sergej Kalaschnikov, Lothar Kleinod, Holger Weiland

This paper presents an analysis of the influence of non-linear consumers in power plants on the voltage quality of service supply networks and describes a solution to improve the voltage quality of this network. Measuring and simulation results are presented...

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Adjustable Speed Electrical Drives Immunity Test to Voltage Dips and Short Interruptions

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Marek Hartman, Krzysztof Zimmermann

The immunity test results of adjustable speed electrical drives to voltage dips and short interruptions have been presented. Based on PN-EN 61000-4-11:1997 standard testing circuit has been built and three different converters have been tested. Some preliminary observation and general conclusions have been included...

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CPLD Based Control System of The Three-phase Zero-current-transition Inverter

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Sławomir Karyś

This paper presents design, analysis and practical realisation of the control system for the three phase six-switch ZCT inverter. Complete design procedure for high power soft switching inverter is shown. Selection of the resonant tank elements and their influence on the control signal are discussed...

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High Frequency Voltage Inverter with an Additional Resonant Circuit

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Elżbieta Szychta

The article presents a resonant voltage inverter with MOSFET transistors, designed to operate at frequency of 2MHz. The main and additional resonant circuits have been analysed. The impact of output capacitances of transistors on the system operation and choice of control method has been discussed...

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Modelowanie matematyczne i numeryczne pracy niepełnofazowej systemu testowego w cyklu jednokrotnego JSPZ w linii 110kV

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Adam St. Jagiełło, Wacław Zając

Metodyka zaprezentowana w pracy umożliwia obliczenie numeryczne stanów nieustalonych dla maszyn synchronicznych, indukcyjnych, transformatorów elektroenergetycznych, odbiorników kompleksowych, przekształtników energoelektronicznych i innych urządzeń połączonych w sieć elektroenergetyczną...

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40-lecie badań kompatybilności elektromagnetycznej w elektrotechnice okrętowej prowadzonych na wydziale elektrotechniki i automatyki Politechnik Gdańskiej

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Krzysztof Fagiewicz

W artykule przedstawiony został przebieg brac badawczych, wykonanych w latach 1962-2003, które dotyczyły problematyki kompatybilności elektromagnetycznej okrętowych urządzeń elektrycznych. Zaprezentowano zakres badań, który obejmował identyfikację źródeł zaburzeń elektromagnetycznych, propagację...

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