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e & i Elektrotechnik und Informationstechnik OnlineFirst articles

19.01.2021 | Originalarbeit Open Access

Considerations for a power line communication system for traction batteries

Electric vehicles (EVs) are without a doubt one of the hottest topics of our time because of their advantages over combustion engine vehicles. This has persuaded many developers to try improving EVs so they will be more reliable and cheaper and as …

Autoren:
Arash Pake Talei, Wolfgang A. Pribyl, Günter Hofer

18.12.2020 | Originalarbeit Open Access

Fast and simple model generation for superjunction power MOSFETs

An easy way to get accurate SPICE models even without precise information from the data sheet

This paper describes a new way to create a behavioral model for power MOSFETs with highly nonlinear parasitic capacitances like those based on superjunction (SJ) principles. The process ranges from a simple measurement to the final model for SPICE …

Autoren:
Michael Fuchs, Lukas Spielberger, Ko Odreitz, Bernd Deutschmann

04.12.2020 | Originalarbeit Open Access

Microwatt power management: challenges of on-chip energy harvesting

IoT devices become more and more popular which implies a growing interest in easily maintainable and battery-independent power sources, as wires and batteries are unpractical in application scenarios where billions of devices get deployed. To keep …

Autoren:
Stefan Schmickl, Thomas Faseth, Harald Pretl

16.11.2020 | Originalarbeit Open Access

Systematic stability analysis, evaluation and testing process, and platform for grid-connected power electronic equipment

The proportion of grid-connected power electronic equipment is already large enough to influence the dynamic characteristics of the modern power system. Ensuring the stability of grid-connected power electronic equipment in all relevant situations …

Autoren:
Ziqian Zhang, Robert Schürhuber, Lothar Fickert, Katrin Friedl, Guochu Chen, Yongming Zhang

16.11.2020 | Originalarbeit

Übertragungsfunktionen zur Abschätzung der gestrahlten Emissionen von HV-Kraftfahrzeugkabeln

Komponenten im elektrischen Antriebsstrang von Kraftfahrzeugen müssen strenge Normen bezüglich der abgestrahlten Magnetfeldemissionen erfüllen. Hochvoltkabel spielen eine wichtige Rolle bei der Verteilung von beabsichtigten funktionalen und …

Autoren:
Madhavi Dhara, Guido A. Rasek

09.11.2020 | Originalarbeit Open Access

Low-power integrated transmitter design using frequency multiplication techniques

Edge-combining and third harmonic extraction

This paper proposes an approach to employ frequency multiplication techniques like edge-combining and third harmonic extraction in ultra-low-power integrated transmitter design. The overall power demand of the transmitter is reduced by keeping …

Autoren:
Markus Stadelmayer, Tim Schumacher, Thomas Faseth, Harald Pretl

06.11.2020 | Originalarbeit Open Access

Ultra-thin oxide breakdown for OTP development in power technologies

OTP (One Time Programmable) memory in power technology enables electrical performance optimization together with area occupation reduction. In this paper, the aspects relative to the oxide breakdown (which is the key mechanism for memory …

Autoren:
Osvaldo Gasparri, Mirko Bernardoni, Paolo Del Croce, Andrea Baschirotto

01.02.2013 | Reprint

Digital programmable power device for LED lighting

LED lighting uses typically switched mode power supply (SMPS) techniques to generate the appropriate LED voltage and current out of high mains voltages. A variety of SMPS controllers is available on the market for this application. Most of these cont…

Autor:
Dipl.-Ing. Torsten Hinz

29.01.2013 | cigre 2012

Tuned medium-band UHF PD measurement method for GIS

In order to replace the lightning impulse test, a very sensitive PD-measurement is required for onsite tests of GIS (CIGRE Joint Working Group 33/23.12 in Electra No 176, 1998). The most sensitive UHF-PD-measurement technique consists of low-noise hi…

Autoren:
S. M. Hoek, S. M. Neuhold

24.01.2013 | cigre 2012

Use of high thermal limit conductors in the replacement of 220 kV overhead lines in the Tirolean Alps

The distribution system operator TIWAG-Netz AG operates a 220 kV grid in the alpine region of Tirol. Due to the age of the conductors, the fittings and the pylons (approximately 50 years), the question has arisen as to whether, for parts of…

Autoren:
J. Bodner, M. Höfer, M. Laußegger, G. Stampfer, H. Strobl, H. Wörle

24.01.2013 | cigre 2012

Effects from downbursts on overhead lines. Meteorological thunderstorm study—climatological, meteorological and CFD analysis

In February and March 2008 cyclone “Emma” crossed some countries of central Europe and caused severe damages. In very local areas thunderstorms with downbursts were embedded in “Emma” and led to collapses of overhead lines.Downbursts are downward win…

Autoren:
C. Karner, H. Lugschitz, S. Tschannett, M. Ratheiser, W. Gepp, A. Beck, H. Kaufmann

22.01.2013 | cigre 2012

Extension and optimization of the load range of DRT test systems for testing extra-long HV and UHV cables

In the last few years, the demand for testing extra-long cables, such as submarine cables has grown rapidly. The existing testing methods have been complemented by a new testing technology called DRT (Differential Resonance Technology). This testing …

Autoren:
P. Mohaupt, H. Geyer, B. A. Bergman, S. Bergman, A. E. Bergman, W. Kemmetmüller, S. Eberharter, A. Kugi

22.01.2013 | cigre 2012

Power transformers with environmentally friendly and low flammability ester liquids

To improve personal safety and reduce the environmental impact of electrical power supply, alternative insulation fluids are demanded for large power transformers. With their biodegradability, the fact that they can be produced from renewable resourc…

Autoren:
G. J. Pukel, R. Schwarz, F. Baumann, H. M. Muhr, R. Eberhardt, B. Wieser, D. Chu

22.01.2013 | cigre 2012

Condition assessment of instrument transformers using dielectric response analysis

Dielectric response analysis is an advanced technique, providing information about the insulation condition of the measured test object. It is typically used for power transformers, where the water content in the solid cellulosic insulation can be as…

Autoren:
S. Raetzke, M. Koch, M. Krueger, A. Talib

22.01.2013 | cigre 2012

Direct current in transformers: effects and compensation

Due to the high magnetic conductivity of transformer cores, very small direct currents in the electric power grid are sufficient to cause half-cycle saturation of the core. Even minor DC-bias leads to a considerable increase of the noise level and to…

Autoren:
F. Bachinger, A. Hackl, P. Hamberger, A. Leikermoser, G. Leber, H. Passath, M. Stoessl

22.01.2013 | cigre 2012

Improving the portability and exchangeability of model data for smart grids focusing on real-time simulations—definition of a common reference model

A key and important aspect of future power and energy systems is the integration of renewable and distributed energy resources. In order to develop, test and implement such distributed energy resources appropriate methods, procedures and guidelines a…

Autoren:
T. Strasser, M. Stifter, W. Hribernik, E. Lambert, P. Kotsampopoulos, P. Crolla, C. Tornelli

16.01.2013 | Originalarbeiten

White light by LED—mechanism of generation and evaluation of quality

The generation of white light by Light Emitting Diodes (LED) is presented. Unlike thermal emitters (e.g. incandescent bulbs) or UV excited fluorescent light-sources (e.g. compact fluorescent bulbs), the emission is in the visible range only, allowing…

Autoren:
Istvan Peter Bakk, Peter Pachler

16.01.2013 | cigre 2012

Berichte über die Diskussionen der Studienkomitees der CIGRE

16.01.2013 | cigre 2012

CIGRE-Session 2012

09.01.2013 | Originalarbeiten

Thermal management of LED systems

A short overview on thermal management solutions for LED systems is presented. Heat transfer modes of these systems are described, from junction to ambient, giving an estimate on the contribution of each process involved, focusing on the key paramete…

Autoren:
Dipl.-Ing. Istvan Peter Bakk, Dipl.-Ing. Giulio Borsoi, Dipl.-Ing. Pier Angelo Favarolo