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Type: Artigo de periódico
Title: Interaction between EMI filter and power factor preregulators with average current control: Analysis and design considerations
Author: Spiazzi, G
Pomilio, JA
Abstract: The effects of a nonnegligible source impedance, due to the presence of an input EMI filter, on the stability of power factor preregulators (PFP's) with average current control are analyzed by using a state-space averaged model. Differently from previous approaches, it allows us to derive a simple expression for the loop gain in terms of the converter current loop gain. The overall system stability was studied for boost, Cuk, and SEPIC PFP topologies. Based on this model, a simple modification of the standard current control loop is proposed which increases the converter robustness against instabilities. Comparison between model forecasts and experimental measurements was carried out using two prototypes, one based on the boost topology and the other based on the SEPIC topology, both rated at 600 W, Finally, the model accuracy was investigated with measurements at different current loop bandwidths.
Subject: power filters
stability criteria
switched-mode power supplies
Country: EUA
Editor: Ieee-inst Electrical Electronics Engineers Inc
Rights: fechado
Identifier DOI: 10.1109/41.767065
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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