Theoretical and experimental investigation of the fast- and slow-scale instabilities of a DC-DC converter

Author

Mazumder, Sudip K. ; Nayfeh, Ali H. ; Boroyevich, Dushan

Author_Institution

Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

16

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

201

Lastpage

216

Abstract

We use an exact formulation based on nonlinear maps to investigate both the fast-scale and slow-scale instabilities of a voltage-mode buck converter operating in the continuous conduction mode and its interaction with a filter. Comparing the results of the exact model with those of the averaged model shows the shortcomings of the latter in predicting fast-scale instabilities. We show the impact of parasitics on the onset of chaos using a high-frequency model. The experimentally validated theoretical results of this paper provide an improved understanding of the dynamics of the converter beyond the linear regime and this may lead to less conservative control design and newer applications

Keywords

DC-DC power convertors; bifurcation; chaos; circuit stability; network analysis; DC-DC converter; bifurcation; chaos; continuous conduction mode; differential inclusion; discontinuous systems; fast-scale instabilities; filter interaction; high-frequency model; slow-scale instabilities; voltage-mode buck converter; Buck converters; Chaos; Circuits; Control design; Filters; Power system modeling; Predictive models; Pulse width modulation; Switches; Voltage control;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.911144

Filename

911144