Time-Domain Electromagnetic Interference Measurement System for intermittent disturbances

Costa, G.W.O.; Pous, Marc; Atienza, Andreu; Silva, Ferran

doi:10.1109/emceurope.2014.6931019

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…The full-time-domain (Full-TDEMI) EMI measurement system employed for the in-situ measurements have been developed and extensively used in recent years by GCEM-UPC [8][9][10][11][12]. This measurement system is based on a timedomain acquisition followed by a post-processing stage which allows obtaining equivalent results than conventional EMI test receiver.…”

Section: A Overview Of the Full-time Domain Measurement Systemmentioning

confidence: 99%

“…The amplitude spectrum of the EMI is computed using the Short-Time Fourier Transform and nonparametric spectral estimation methods. More details can be found at [8][9][10][11][12]. Regarding the equipment and the software used to conduct the measurements at the fixed installation shown in this paper two different hardware have been used.…”

Section: A Overview Of the Full-time Domain Measurement Systemmentioning

confidence: 99%

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Benefits of full time-domain EMI measurements for large fixed installation

Pous

Azpúrua

Silva

2016

2016 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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Abstract-It is difficult to properly evaluate the electromagnetic disturbances generated by large fixed installations because of, i.e., the background noise, unsteady emissions and transient interferences. Those challenging EMC issues have been recently studied in European research projects on improved test methods in industrial environments. In order to overcome traditional in-situ EMI measurement troubles, a novel time-domain methodology is proposed and used in a real fixed installation with large machinery. Firstly, a comparison between the developed measurement system, using an oscilloscope, and an EMI receiver is done in some test-cases for validation purposes. After verifying the accuracy of the measurements, we proceed with the measurement campaign applying the full time-domain methodology. The main benefits of employing the time-domain system are emphasised through the results. It was observed that the some remarkable advantages of the time-domain approach are: triggering by disturbance events, extremely reduce the capturing time, identify on real time the worst emissions modes of the EUT, avoid changes at the background noise and perform simultaneous multichannel synchronous measurements.

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Section: A Overview Of the Full-time Domain Measurement Systemmentioning

confidence: 99%

Section: A Overview Of the Full-time Domain Measurement Systemmentioning

confidence: 99%

Benefits of full time-domain EMI measurements for large fixed installation

Pous

Azpúrua

Silva

2016

2016 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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“…On the other hand, measurements and analyses of the near-fields in the time-domain are becoming increasingly important for characterizing the electromagnetic emission properties of the DUT. This is because it is recognized that the interference in many digital systems and communications links are better quantified in the time-domain [13] and also time-domain analysis can be more efficient [14]. For this reason, several researchers have proposed time-domain near-field scanning techniques [15]- [20].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Near-Field Electromagnetic Emissions and Characterization Based on Equivalent Dipole Model in Time-Domain

Yuan

Baharuddin

Smartt

et al. 2020

IEEE Trans. Electromagn. Compat.

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In this paper, a method for representing electromagnetic emissions from a device under test (DUT) using an equivalent time dependent dipole array model deduced from the time-domain near-field scanned tangential magnetic fields is proposed. First, a 3D time-domain near-field scanning system is established to measure the tangential magnetic fields emitted from DUTs which are a transmission line above a ground plane and a printed circuit board (PCB) with several microstrips respectively. For time-domain measurements, two magnetic field probes are calibrated over a broad bandwidth for both amplitude and phase to obtain their complex probe factors. Then the measured magnetic fields are utilized to construct an equivalent time dependent dipole array model to represent the electromagnetic sources of the DUT. Parameters of the time dependent equivalent dipoles are directly calculated by fitting to the measured magnetic fields. The effects of different number of dipoles on the accuracy of the reconstructed magnetic fields from the PCB are studied. The reconstructed equivalent dipoles of the DUTs can be used to predict the electromagnetic fields at other observation levels. The results predicted by the equivalent dipole model are in agreement with the simulated and measured results. Index Terms-Equivalent dipole model, magnetic fields, printed circuit board, time-domain near-field scanning, transmission line.

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“…Notwithstanding, the inclusion of the TDEMI measurement systems in the CISPR 16-1-1 standard neither attempt to address the study of electromagnetic disturbances in the time domain nor makes the test equipment less expensive. In fact, the large majority of the commercially available EMI receivers with the optional time domain scan functionality are a very sophisticated piece of hardware that is neither affordable for small laboratories nor is suitable for in-situ measurements [8].…”

Section: Introductionmentioning

confidence: 99%

A measurement system for radiated transient electromagnetic interference based on general purpose instruments

Azpúrua

Pous

Silva

2015

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)

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Abstract-This paper presents a measurement system intended to be used to assets the radiated electromagnetic interference (EMI) in both time and frequency domains. In order to keep the measurement setup as accessible and practical as possible, the direct measurements are recorded with a general purpose digital oscilloscope and processed with a commonly available personal computer. The measurement system was validated for radiated emissions testing using well-known, controlled transient and continuous signals emulating typical interferences. The results are in satisfactory agreement with those provided by a conventional EMI receiver for different types of detectors. The proposed approach shows that, currently, it is possible to implement a timesaving, accurate and generally inexpensive time domain measurement system for radiated emissions that is capable to overcome the limitations of the superheterodyne EMI receivers regarding the measurement of discontinuous electromagnetic disturbances and also able to provide additional enhanced features to evaluate and troubleshoot EMI problems.

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Time-Domain Electromagnetic Interference Measurement System for intermittent disturbances

Cited by 8 publications

References 8 publications

Benefits of full time-domain EMI measurements for large fixed installation

Benefits of full time-domain EMI measurements for large fixed installation

Measurement of Near-Field Electromagnetic Emissions and Characterization Based on Equivalent Dipole Model in Time-Domain

A measurement system for radiated transient electromagnetic interference based on general purpose instruments

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