NDLI: Modeling conducted EMI noise generation and propagation in boost converters

Content Provider	IEEE Xplore Digital Library
Author	Gitau, M.N.
Copyright Year	2000
Description	Author affiliation: Dept. of Electr., Electron., & Comput. Eng., Pretoria Univ., South Africa (Gitau, M.N.)
Abstract	Models to predict generation and propagation mechanisms of conducted EMI noise in switch mode converters comprising of a diode-bridge rectifier input stage, and a 250 kHz boost converter stage are presented. It is demonstrated that a converter employing ZVT PWM generates lower levels of both conducted and radiated EMI emissions compared with hard-switched PWM operation. It is also shown that the effect of active input current wave shaping is to slightly reduce common-mode conducted emissions but increase differential-mode conducted emissions. Additionally, it is shown that the presence of the boost inductor leads to quasi common-mode conduction and that the parasitic capacitance between main switching device's heat sink and ground plane primarily determines common-mode conducted emissions. Mathematical equations to predict both differential- and common-mode conducted emissions are derived. Experimental results and important operational waveforms obtained using a 750 W unit are presented and compared with analytical and simulated results.
Starting Page	353
Ending Page	358
File Size	640997
Page Count	6
File Format	PDF
ISBN	0780366069
DOI	10.1109/ISIE.2000.930322
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-12-04
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electromagnetic interference Noise generators Switches Switching converters Pulse width modulation Pulse width modulation converters Predictive models Diodes Rectifiers Inductors
Content Type	Text
Resource Type	Article

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