Nonlinear discrete-time analysis of the fixed frequency switch-mode DC-DC converters dynamics

Author

Papafotiou, Georgios A. ; Margaris, N.I.

Author_Institution

Autom. Control Lab., Swiss Fed. Inst. of Technol., Zurich, Switzerland

Volume

52

Issue

6

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

322

Lastpage

326

Abstract

This brief suggests a modified approach to the discrete-time analysis of fixed frequency switch-mode dc-dc converters. The method presented here is based on the formulation of a nonlinear difference equation with respect to the duty cycle, which describes the closed-loop behavior of the system considered. The difference equation allows the complete examination of the system´s steady state during normal operation, as well as in the case where subharmonic oscillations or chaos are developed.

Keywords

DC-DC power convertors; PWM power convertors; closed loop systems; difference equations; discrete time systems; nonlinear differential equations; oscillations; switched mode power supplies; DC-DC power conversion; closed loop behavior; fixed frequency switch-mode DC-DC converters; nonlinear difference equation; nonlinear discrete-time analysis; pulsewidth modulation; steady state system; subharmonic oscillations; switched systems; Chaos; Difference equations; Frequency conversion; Power conversion; Pulse modulation; Space vector pulse width modulation; Steady-state; Switches; Switching converters; Voltage control; DC–DC power conversion; discrete-time systems; pulsewidth modulation; switched systems;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2005.848996

Filename

1453746