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Abstract:
The model of electromagnetic interference (EMI) receiver is critical for conductive EMI simulation technique with full circuit time-domain simulation. The EMI spectrum characteristics with different control strategies has been analyzed which points out that sideband effects in the EMI noise spectrums would exist with variable frequency and/or variable duty cycle controls. The sideband effects and the bandwidth of the EMI receiver are the key reasons for the spectrum differences between fast Fourier transform (FFT) analysis and results of EMI receiver. A method was proposed, via experiments, to get the practical band-pass characteristics of IF (intermediate frequency) filter of the EMI receiver, and mathematical model based on Gaussian function was then induced. Phase-frequency characteristics of IF filter of the EMI receiver was analyzed by an experiment and it has little impact on the output of IF filter. Thus the influence of phase-frequency characteristics of IF filter can be neglected. Based on analysis of the common waveform of the switch-mode power supply, the suitable bandwidth of the EMI receiver was determined to get the precise EMI receiver model. At last, the noise tests had been performed to verify the effectiveness and the accuracy of the model. © 2019 Chin. Soc. for Elec. Eng.
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Proceedings of the Chinese Society of Electrical Engineering
ISSN: 0258-8013
Year: 2019
Issue: 14
Volume: 39
Page: 4251-4261
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
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Chinese Cited Count:
30 Days PV: 0
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