Closed-loop input and output impedances of DC-DC switching converters operating in voltage and current mode control

Author

Ahmadi, Reza ; Paschedag, Darren ; Ferdowsi, Mehdi

Author_Institution

Missouri Univ. of Sci. & Technol., Rolla, MO, USA

fYear

2010

fDate

7-10 Nov. 2010

Firstpage

2311

Lastpage

2316

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.

Keywords

DC-DC power convertors; impedance convertors; switching convertors; voltage control; DC-DC switching converters; buck-boost converters; closed loop input impedance; current mode control; output impedance; small-signal converter; voltage mode control; Converters; Equations; Impedance; Leg; Mathematical model; Power system stability; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society

Conference_Location

Glendale, AZ

ISSN

1553-572X

Print_ISBN

978-1-4244-5225-5

Electronic_ISBN

1553-572X

Type

conf

DOI

10.1109/IECON.2010.5675123

Filename

5675123