Title :
Calculation and stability investigation of periodic steady states of the voltage controlled Buck DC-DC converter
Author :
Papafotiou, Georgios A. ; Margaris, Nikos I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Greece
fDate :
7/1/2004 12:00:00 AM
Abstract :
A new method for investigating the complex dc-dc converters dynamics is suggested in this paper. The method is based on the formulation of a nonlinear difference equation with respect to the duty cycle. This equation embodies the nonlinear and discrete-time characteristics of dc-dc converters and allows both the calculation of normal and subharmonic steady states and their local stability analysis. The method is presented through the analysis of a voltage controlled Buck dc-dc converter.
Keywords :
DC-DC power convertors; PWM power convertors; discrete time systems; nonlinear differential equations; stability; voltage control; duty cycle; local stability analysis; nonlinear difference equation; nonlinear discrete-time analysis; periodic steady states; stability investigation; subharmonic oscillations; subharmonic steady states; voltage controlled buck DC-DC converters; Difference equations; Frequency; Open loop systems; Pulse width modulation; Space vector pulse width modulation; Stability; Steady-state; Switches; Switching converters; Voltage control; DC–DC power conversion; nonlinear discrete-time analysis; subharmonic oscillations;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2004.830040
