Time-domain measurement technique to analyze cyclic short-time interference in power supply networks

Setiawan, Iwan; Keyer, Cees; Azpúrua, Marco A.; Silva, Ferran; Leferink, Frank

doi:10.1109/apemc.2016.7523034

Cited by 9 publications

(12 citation statements)

References 15 publications

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“…Then, the pulse repetition frequency is set by the control signal. Regarding the measuring instrument, a real-time digital oscilloscope Tektronix DPO5104B with the input impedance set to 50 Ω was used and the acquired waveforms were transformed into a quasi-peak amplitude level according to the methodology used compliant full time-domain EMI measurement systems [2], [3], [10], [12], [13]. Validation measurements were performed with an R&S ESPI test receiver.…”

Section: Experimental Validationmentioning

confidence: 99%

Specifying the Waveforms for the Calibration of CISPR 16-1-1 Measuring Receivers

Azpúrua

Pous

Silva

2020

IEEE Trans. Electromagn. Compat.

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Ensuring the measuring receiver's compliance with the specifications given in CISPR 16-1-1 is mandatory. This is achieved through traceable calibration of the instrument regarding its standard requirements. Incidentally, the receiver's response to pulses of the weighting detectors is the most challenging aspect that must be calibrated. The calibration method requires generating broadband pulses of a given impulse area and at certain repetition frequencies. Such pulses must deliver a known quasi-peak level and have a flat spectrum over the frequency band under consideration. Whereas the standard states the tolerable uncertainties for the pulse characteristics, it does not stipulate their exact waveform. This void is significant because it hinders the reproducibility of the calibration method, it forbids to completely describe the CISPR 16-1-1 pulse generator and, it truncates the traceability chain. This paper proposes a parametric model for pulsed waveforms that are compliant with the requirements established for the calibration of the receivers' response to pulses. The model is numerically solved and evaluated for producing a waveform vector that can be transformed into a reference voltage signal using arbitrary function generators. The validity of the proposed waveforms is experimentally verified in terms of its time domain characteristics and its frequency spectrum.

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Section: Experimental Validationmentioning

confidence: 99%

Specifying the Waveforms for the Calibration of CISPR 16-1-1 Measuring Receivers

Azpúrua

Pous

Silva

2020

IEEE Trans. Electromagn. Compat.

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“…The data is sampled and digitised by the PicoScope and transferred to the connected computer, as described in [4]. The post-processing is developed via Digital Signal Processing (DSP) which is done in Matlab similar to the methodology as described in [5], [6], [7]. The digitized signal in the time domain are transformed to the frequency domain using Fast Fourier Transform (FFT) and the amplitude spectrum is obtained.…”

Section: Figure 1 Calibration Test Setup For Nrs01 [2]mentioning

confidence: 99%

Efficient magnetic field measurements

Setiawan

Moonen

Buesink

et al. 2017

2017 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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Measuring magnetic fields of equipment under test at low frequencies which is received by loop antennas using an EMI receiver with small bandwidths takes much time and can even reach a week for a standard measurement. This waste in time could be avoided by applying time domain measurements. Commercial time-domain EMI (TDEMI) measurement equipment are sampling at the intermediate frequency, and are still relatively expensive. Base-band sampling using low-cost digitizers, or an oscilloscope, is proposed in this paper. The measured data is converted to the typical results in frequency domain via fast Fourier transform, while the necessary large dynamic range is achieved via oversampling. This methodology decreases the cost of the test equipment, but most of all reduces the measurement time drastically compared to the classical frequency domain measurement approach. The setup is described. Measurements with a conventional receiver parallel to the digitizer using a signal generator powering a radiating loop have been performed. Also measurements on an actual interfering source with pulsed magnetic fields are performed. It is shown that the measurement results are the same, while the measurement time has been reduced drastically.

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“…Several time-domain electromagnetic interference (TDEMI) measurements have been studied extensively in for instance [2]- [4], with an increasing interest in the (fast) transient analysis [5], [6]. With [2] proposing to decompose the electromagnetic interference (EMI) in differential mode (DM) and common mode (CM), [5] decomposing the EMI transient phenomena in time domain through DSP, and [3], [6] to use short term fast Fourier transform (STFFT) techniques to present time-frequency plots (i.e. spectrograms).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Multichannel Synchronous Conducted TDEMI Measurements for High Voltage Power Electronics

Hartman

Moonen

Leferink

2018

2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE)

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Safely measuring high power conducted electromagnetic interference (EMI) is an issue to be addressed, where a possible measurement strategy is being discussed in this paper which uses the benefits of multi-channel synchronous timedomain electromagnetic interference (TDEMI) measurements. Only the differential mode (DM) voltage has been evaluated in this paper, however the setup is not limited in this respect. Common mode (CM) voltage can also be synchronously analyzed with this setup. Nevertheless, with respect to the to be measured amplitudes, DM voltages in this particular system offer a larger challenge and are addressed. The setup was developed with respect to Low-Frequency conducted EMI measurements in high power, fast switching systems using a low-cost solution.

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Time-domain measurement technique to analyze cyclic short-time interference in power supply networks

Cited by 9 publications

References 15 publications

Specifying the Waveforms for the Calibration of CISPR 16-1-1 Measuring Receivers

Specifying the Waveforms for the Calibration of CISPR 16-1-1 Measuring Receivers

Efficient magnetic field measurements

Evaluation of Multichannel Synchronous Conducted TDEMI Measurements for High Voltage Power Electronics

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