A general unified approach to modelling switching-converter power stages

Abstract

A method for modelling switching-converter power stages is developed, whose starting point is the unified state-space representation of the switched networks and whose end result is either a complete state-space description or its equivalent small-signal low<-f requency linear circuit model. A new canonical circuit model is proposed, whose fixed topology contains all the essential inputr-output and control properties of any dc-todc switching converter, regardless of its detailed configuration, and by which different converters can be characterized in the form of a table con veniently stored in a computer data bank to pro vide a useful tool for computer aided design and optimization. The new canonical circuit model predicts that, in general;switching action intro duces both zeros and poles into the duty ratio to output transfer function in addition to those from the effective filter network.

Design of Type-III controller for dc-dc switch-mode boost converter

“…The small signal [5][6][7] modeling of dc-dc switched-mode boost converter transfer function is written in equation (1). (1), it has been observed that a righthalf plane zero presents in the transfer function of boostconverter.…”

“…For this reason Typecontrollers [4] are best suited. The state-space averaging [5][6][7] methods have been used for mathematical modelling of converter. The main objective of this paper is to design Type-III controller for a boost converter and check the converter's closed loop stability in time and frequency domain.…”

Stability Analyses of a VFT Park Using a Sequential Continuation Scheme and the Limit Cycle Method

“…These averaging methods can be useful for computing the steady-state and performing stability analysis by setting to zero and linearizing the averaged model, respectively. Averaging theory based on classical Russian averaging techniques is widely used in the analysis of PWM-based power-electronic systems [20]. However, this state-space averaging method may show discrepancies at lower switching frequencies and, therefore, is limited to systems with time discontinuities and large ripple conditions.…”

A robust multivariable approach for hybrid fuel cell supercapacitor power generation system

“…The SC is modelled using a classical dynamic model composed with a (R-C) series circuit. The average modeling methodology, see [14] or [15], is then used to obtain a non-linear average model of the switching system, given by the following set of equations:…”