Closed-Loop Input and Output Impedances of DC-DC Switching Converters Operating in Voltage and Current Mode Control

Abstract

This work derives the closed-loop input and output impedances of three major types of DC-DC converters (Buck, Boost, and Buck-Boost) operating in voltage or current mode control. First, it introduces the small-signal converter model employed to derive the input and output impedances. Next, it reviews open-loop impedances for use in simplifying the expressions developed for closed-loop impedances. It then derives the closed-loop impedances by closing the voltage or current loop (depending on control method) in the converter model. Finally, The validity of the impedances thus derived is verified by simulation.

Meeting Name

36th Annual Conference of the IEEE Industrial Electronics Society (2010: Nov. 7-10, Glendale, AZ)

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Buck-Boost; Closed-Loop; Control Methods; Converter Model; Current Loop; Current Mode Control; DC-DC Switching Converters; Input And Output Impedance; Open Loops; Small Signal; Closed Loop Control Systems; Electric Impedance; Industrial Electronics; Switching Circuits; DC-DC Converters; Converters; Impedance; Mathematical Model; Voltage Control; Leg; Equations; Power System Stability; DC-DC Power Convertors; Impedance Convertors; Switching Convertors

International Standard Book Number (ISBN)

978-1424452255

International Standard Serial Number (ISSN)

1553-572X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Nov 2010

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