EPE Association: EPE-PEMC 2000 - Topic 04a: Electromagnetic Emission

EPE-PEMC 2000 - Topic 04a: Electromagnetic Emission
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 04: Electromagnetic Compatibility > EPE-PEMC 2000 - Topic 04a: Electromagnetic Emission

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   Disturbance Caused by Long Leads between PWM Frequency Converter and AC Induction Motor
By Mikulanin P., Koláø V., Vrána V., Pracuch R. [View]
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Abstract: This paper deals with effects arising at PWM inverter output, across cable between PWM inverter and induction motor and at induction motor terminals that influence conducted and radiated interference emissions of an adjustable-speed drive at the same time. The contribution also describes transmission paths of electromagnetic disturbance, explains a cause of its origin and in the end suggests mitigation techniques, design, properties and consequences of use of suppression filters for electromagnetic disturbance and transients influencing electromagnetic disturbance in direct way. Experimental and simulation results are presented.

   Random Pulse Position Modulation - a Comparison
By Biskup T., Teluk J. [View]
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Abstract: The main aim of the paper is to presented comparison of two randomised pulse position modulation realizations. Both strategies were implemented in the industrial PWM inverter. The investigations include measurements of voltage and noise spectra of the induction motor fed by the PWM inverter. The authors chose space vector modulation (SVM) as a base for random techniques. The first one is well known random lead-lag algorithm (RLL) with different zero vectors in lead and lag points. The second one is based on random distribution zero vectors from classical scheme of SVM. The obtained measurements were compared with fixed switching SVM technique and random switching frequency (RSF).

   Spectral Measurement on the System Frequency Converter - Cable - Induction Motor
By Kûnzel K., Papež V. [View]
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Abstract: The submitted paper deals with measuring of signals in power drive system. The measurement of frequency signals spectrum is considered for the better description of such systems. The problems of voltage and current signal measurement are discussed separately. The realised compensated voltage divider is presented. There are results of the practical measurements in the paper. The demand of various filtering and matching circuits to the results of measurement is illustrated. The connections between the features of drive system and the measured parameters are described.

   Superposition of Harmonic Generation in Voltage- and Current-Source-Rectifiers
By Rafoth A., Machost D.*, Petzold J. [View]
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Abstract: The aim of this paper is to describe the sources of harmonics in inverters and their superposition. Simulation models describing CSI and VSI, which are compared to practise, are used to separate the several influences. For the analysis of measured and simulated data a pure DFT algorithm seems to be not very helpful. Therefore a proposal of [1] is used to improve the quality of the results. The frequency resolution is extended and the spectrum lines are summed up to bands. Simulated and measured data showing the separation of the distortions for a CSI are presented for example.

EPE-PEMC 2000 - Topic 04a: Electromagnetic Emission
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 04: Electromagnetic Compatibility > EPE-PEMC 2000 - Topic 04a: Electromagnetic Emission
	[return to parent folder]

	Disturbance Caused by Long Leads between PWM Frequency Converter and AC Induction Motor By Mikulanin P., Koláø V., Vrána V., Pracuch R.	[View] [Download]
Abstract: This paper deals with effects arising at PWM inverter output, across cable between PWM inverter and induction motor and at induction motor terminals that influence conducted and radiated interference emissions of an adjustable-speed drive at the same time. The contribution also describes transmission paths of electromagnetic disturbance, explains a cause of its origin and in the end suggests mitigation techniques, design, properties and consequences of use of suppression filters for electromagnetic disturbance and transients influencing electromagnetic disturbance in direct way. Experimental and simulation results are presented.

	Random Pulse Position Modulation - a Comparison By Biskup T., Teluk J.	[View] [Download]
Abstract: The main aim of the paper is to presented comparison of two randomised pulse position modulation realizations. Both strategies were implemented in the industrial PWM inverter. The investigations include measurements of voltage and noise spectra of the induction motor fed by the PWM inverter. The authors chose space vector modulation (SVM) as a base for random techniques. The first one is well known random lead-lag algorithm (RLL) with different zero vectors in lead and lag points. The second one is based on random distribution zero vectors from classical scheme of SVM. The obtained measurements were compared with fixed switching SVM technique and random switching frequency (RSF).

	Spectral Measurement on the System Frequency Converter - Cable - Induction Motor By Kûnzel K., Papež V.	[View] [Download]
Abstract: The submitted paper deals with measuring of signals in power drive system. The measurement of frequency signals spectrum is considered for the better description of such systems. The problems of voltage and current signal measurement are discussed separately. The realised compensated voltage divider is presented. There are results of the practical measurements in the paper. The demand of various filtering and matching circuits to the results of measurement is illustrated. The connections between the features of drive system and the measured parameters are described.

	Superposition of Harmonic Generation in Voltage- and Current-Source-Rectifiers By Rafoth A., Machost D., Petzold J.*	[View] [Download]
Abstract: The aim of this paper is to describe the sources of harmonics in inverters and their superposition. Simulation models describing CSI and VSI, which are compared to practise, are used to separate the several influences. For the analysis of measured and simulated data a pure DFT algorithm seems to be not very helpful. Therefore a proposal of [1] is used to improve the quality of the results. The frequency resolution is extended and the spectrum lines are summed up to bands. Simulated and measured data showing the separation of the distortions for a CSI are presented for example.