Modeling, analysis and control of high-order switching power converters

Abstract

LIST OF ACRONYMS vii CHAPTER 1 INTRODUCTION 1 1.1 Background and Motivation 1 1.2 Objectives of This Research Work 6 1.3 Contributions of the Thesis 7 1.4 Organization of This Thesis 7 CHAPTER 2 LITERATURE REVIEW 2.1 Review of the State-of-the-art High-order Dc-Dc Boost Converter Topologies 2.2 Modeling of High-order Boost-type Dc-Dc Converters 2.2.1 Overview of the State-Space Averaging Method 2.2.2 Averaged Model of the Hybrid-Boost Converter 2.2.3 Averaged Model of the 2-stage Cascade Boost Converter 2.3 State-of-the-art Controllers for High-Order Dc-Dc Boost Converters 2.3.1 Current-Mode Controller 2.3.2 Sliding-Mode Controllers 2.3.3 The Output Feedback Controller 2.4 Summary CHAPTER 3 COMPARATIVE STUDY OF FIXED CURRENT-MODE CONTROLLERS FOR HIGH-ORDER DC-DC CONVERTERS iii 3.1 Motivation 3.2 A Comparative Study of Current-mode Controllers for the Positive Output Elementary Luo (POEL) Converter 3.2.1 Comparison Using State-Space Approach 3.2.2 Comparison Using Frequency-Response Approach 3.3 A Comparative Study of Current-mode Controllers for the 2-Stage Cascade Boost Converter 3.3.1 Controller Design Using Root-locus Method 3.3.2 Controller design using classical frequency-domain approach 3.4 Experimental Results 3.4.1 Current-mode Controlled POEL Converter 3.4.2 Current-mode controlled 2-stage cascade boost converter 3.5 Summary CHAPTER 4 SLIDING-MODE CONTROL OF HIGH-ORDER DC-DC CONVERTERS 4.1 Motivation 4.2 Design of Fixed-frequency Pulse-width-modulation (PWM)-Based SM Controllers for the Quadratic Boost Converter 4.2.1 Design of PWM-based SM Controller Using Inputinductor Current 4.2.2 Design of PWM-based SM Controller Using Outputinductor Current 4.3 A Comparative Study of Hysteresis-Modulation (HM)-Based SM Controllers for the Hybrid-type dc-dc Boost Converter 4.3.1 Design of HM-based SM Controller Using Outputinductor Current 4.3.2 Design of HM-based SM Controller Using Inputinductor Current 4.4 Simulation and Experimental Results 4.4.1 Implementation of the PWM-based SM controller for the quadratic boost converter iv 4.4.2 HM-based SM for the hybrid boost converter 4.5 Summary CHAPTER 5 MODELING AND ADAPTIVE CURRENT-MODE CONTROL OF A HIGH STEP-UP DC-DC CONVERTER 5.1 Modeling of a High Step-up dc-dc Converter 5.1.1 Averaged State-space Model of the Converter 5.