Power Electronic Converters

4Dynamic Modeling of Current-Mode Control

4.1 Introduction

This chapter introduces the dynamic modeling of current-mode-controlled (CM) voltage-fed converters. The class of current-mode control includes peak current mode (PCM) control introduced in late 1970s [1], average current mode (ACM) control introduced in early 1990s [2], variable frequency PCM control (i.e., known also as self-oscillation control, boundary-mode control, critical-mode control, transition-mode control, etc.) [3], and hysteretic current-mode control [4,5]. Basically, the modeling of CM control requires developing proper duty ratio constraints, where the perturbed duty ratio is expressed as a function of other circuit variables being part of the duty-ratio generation ...