| EPE-PEMC 2004 - Topic 10-3: EMC related phenomena | ||
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 | Compared Nanocrystalline And Ferrite Optimized Common Mode Choke For Rfi Filters Suitable As Compact Components
By Waeckerle T., Save T., Vachey B., Gautard D., Fraisse H., Bloch F. | |
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Abstract: The design of Common mode chokes for Radio
Frequency Interference filter is considered, explained and
applied to the compared magnetic core characterization and
computation between ferrite and nanocrystalline materials. The
latter shows some better insertion losses at low frequencies
when comparison is made with the same component
characteristics. The volume of the component can be reduced by
50 to 80% when an appropriated ferrite is replaced by a wellchosen
nanocrystalline core, as a result of its superimposed
advantages of high and tailored permeabilities, high saturation
and inductive behavior near CMC resonance.
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| | Determination Of High Frequency Parameters Of An Induction Motor Drive
By Marius Klytta(de), Tonu Lehtla(ee), Pavel Sidelnikov(ee) | |
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Abstract: The paper describes a high frequency model and high
frequency parameter determination of an induction motor drive.
The high frequency features of AC induction motors in the
range of capacity 0.37-15 kW and different winding connection
schemes were studied. The high frequency model of an
induction motor drive was analysed and a method for high
frequency parameter determination was developed.
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| | EMI Analysis Of Power Converters For Layout Optimization
By C. Attaianese, D. Capraro, G. Tomasso | |
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Abstract: In this paper, a detailed analysis on EMI effect of power
converters is performed. The aim is to study the influence of electromagnetic
disturbances on power converter control circuits, in order
to optimize their layout and to avoid accidental control failures
due to EMI. The approach is fully experimental. By means
of several test performed in a anechoic chamber, the control circuit
immunity has been fully investigated. As power circuit, which
is the main EMI source, a simple structure DC/DC converter with
MOSFET devices has been considered, and the internal compatibility
with the control circuit has been verified. In this way, the so
called “electromagnetic self-compatibility” analysis of the converter
has been deeply investigated.
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| | Estimation Of Sinusoidal Signal Frequency Via Numerical Differentiation In Noise
By Wu Jiekang | |
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Abstract: An estimation method for the signals with noises,
basing on a numerical differentiation algorithm, is proposed in
this paper. In at most 1 cycle, the frequency is estimated at an
accuracy of 99.999% over a range of 1Hz to 50kHz. The
simulation results are satisfactory in Matlab software.
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| | Influence Of Output-Current Ripple Components On The Assessment Of Magnetic Field Exposure Caused By Resistance Welding Inverters
By Thoralf Winkler, Reinhard Doebbelin, Tomasz Kazimierz Czarnecki | |
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Abstract: Considering the magnetic field exposure caused by
resistance welding inverters the output current ripple component
double the switching frequency of the inverter unit proves
to be the decisive component concerning compliance with established
exposure limiting rules. In the paper, exposure assessment
results applying ICNIRP guidelines and German BGV
B11 are discussed.
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| | Simulation Of Emc Phenomena Caused By Electrostatic Discharge
By Rafael K. Jardan, Istvan Nagy, Norbert Schendl | |
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Abstract: In the paper the interference of conducted and
radiated electromagnetic noise, caused by electrostatic
discharge, is analysed and the transient processes as well as the
frequency spectra generated by these discharges is studied by
computer simulations. Electric circuits, based on the application
of the principle of distributed element models, are suggested for
the analysis and using these circuits, computer simulations are
carried out and conclusions are drawn about the parameters of
the generated electromagnetic noise and their possible effects.
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| | Synchronised Switching Of Three-Phase Inductive Load
By Zdenek Cerovsky, Pavel Mindl, Miroslav Lev | |
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Abstract: Switching of induction three phase machine is
connected with transient current peak. This peak depends a little
on switching time. The transient current peak can be reduced by
sequential terminals switching. The paper simulates transient
current peaks using a mathematical model. In the experimental
part of the paper the experiments are described and oscillograms
are published
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