Summary
the 2014 International Symposium on Nonlinear Theory and its Applications
2014
Session Number:A2L-A
Session:
Number:A2L-A6
Analytical Determination of Fast-Scale Stability Boundaries in Switched Mode Power Converters by Analyzing their Steady-State Response to Periodic and Subharmonic Excitations
A. El Aroudi,
pp.112-115
Publication Date:2014/9/14
Online ISSN:2188-5079
Summary:
In this paper new and simple closed-form conditions for predicting the fast-scale stability boundaries in switched mode PWM power converters under fixed frequency control are obtained. All single input fixed frequency converters under Trailing Edge (TEM) and Leading Edge Modulation (LEM) schemes are treated using the same unified approach. The stability boundary conditions are obtained from the steady-state response of the discrete-time model using an asymptotic approach without resorting to frequency-domain Fourier analysis and without using the monodromy or the Jacobian matrix of the discrete-time model as it was recently reported in the existing literature on this topic. The availability of such simple closed-form, boundary expressions allows to understand the eｆｆect of the different parameters of the system upon its stability and its dynamical behavior. The results are applied to analyze different examples of switching converters operating in continuous conduction mode.