NDLI: Modeling and Stability Analysis of Cascaded Multi-Converter Systems Including Feedforward and Feedback Control

Content Provider	IEEE Xplore Digital Library
Author	Cho, H.Y. Santi, E.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. Eng., Swearingen Eng. Center Columbia, Columbia, SC (Cho, H.Y.; Santi, E.)
Abstract	As a unified framework to describe a converter system in the presence of both source and load system interactions under both feedforward and feedback control, a general minor loop gain stability criterion using the two extra element theorem is proposed. To derive the general minor loop gain and analytically interpret the source and load system interactions, small-signal models by using the g-parameter representation are used. As an illustrative example, a buck converter system with a source and a load system is considered. The stability improvement of the whole system by a positive feedforward control is demonstrated by simulation in frequency and time domain. The proposed design approach of a positive feedforward control acts as active filter improving input port stability at high frequencies. The stability improvement is obtained with limited sacrifice of system bandwidth and no hardware modification of the physical system.
Starting Page	1
Ending Page	8
File Size	307597
Page Count	8
File Format	PDF
ISBN	9781424422784
ISSN	01972618
DOI	10.1109/08IAS.2008.295
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-05
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Buck converters Stability criteria Bandwidth Open loop systems Control systems Active filters Stability analysis Hardware Feedback control Impedance
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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