Integrated Power Electronic Converters and Digital Control

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1 Integrated Power Electronic Converters and Digital Control Ali Emadi * Alireza Khaligh Zhong Nie Young Joo Lee Q\ CRC Press / Taylor &.Francis Group Boca Raton London New York CRC Press is an imprint of the Taylor & Francis Group, an informa business

2 Contents Preface Authors xv xvii Chapter 1 Non-isolated DC-DC Converters Buck Converter Buck Converter in Continuous Conduction Mode Buck Converter in Discontinuous Conduction Mode Design Considerations for Buck Converter Boost Converter Boost Converter Operation in Continuous Conduction Mode Boost Converter Operating in Discontinuous Conduction Mode Design Considerations for Boost Converter Buck-Boost Converter Buck-Boost Converter in Continuous Conduction Mode Buck-Boost Converter in Discontinuous Conduction Mode Design Considerations for Buck-Boost Converter 16 References 17 Chapter 2 Isolated DC-DC Converters Flyback Converter Forward Converter Push-Pull Converter Full-Bridge Converter Half-Bridge Converter 28 References 30 Chapter 3 Power Factor Correction Concept of PFC General Classification of PFC Circuits 35

3 xvu Contents 3.3 High Switching Frequency Topologies for PFC Buck Converter as Power Factor Corrector Boost Converter as Power Factor Corrector Buck-Boost Converter as PFC Cuk Converter as PFC SEPIC Converter as PFC Zeta Converter as PFC Flyback Converter as PFC Forward Converter as PFC Application of PFC in Advanced Motor Drives 46 References 50 Chapter 4 Integrated Switched-Mode Power Converters Switched-Mode Power Supplies Concept of Integrated Converter Integrated Converter Configuration Definition of Integrated Switched-Mode Power Supplies (ISMPS) 54 References 57 Chapter 5 Boost-Type Integrated Topologies General Structure of Boost-Type Integrated Topologies Boost-Flyback Converter Boost-Double-Ended Flyback Converter Boost Series Parallel Flyback Converter Boost-Parallel Flyback Converter Boost-Forward Converter Boost-Double-Ended Forward Converter Boost Series Parallel Forward Converter Boost-Parallel Forward Converter Boost-Full-Bridge Converter Boost-Half-Bridge Converter Boost-Push-Pull Converter Boost-Buck-Boost Converter Boost Integrated Flyback Rectifier/Energy Storage Converter Boost-Buck Converter (Cuk Converter) Boost Integrated Buck Rectifier/Energy Storage Converter 69 References 69 Chapter 6 Buck-Type Integrated Topologies Concept of Boost-Integrated Converter Buck Flyback Converter Buck Double-Ended Flyback Converter Buck-Series/Parallel Flyback Converter 72

4 Contents ix 6.5 Buck Parallel Flyback Converter Buck Forward Converter Buck Double-Ended Forward Converter Buck Series Parallel Forward Converter Buck Parallel Forward Converter Buck Full-Bridge Converter Buck Half-Bridge Converter Buck Push-Pull Converter 78 References 79 Chapter 7 Buck-Boost Type Integrated Topologies Structures of Buck-Boost Type Integrated Topologies Buck-Boost Flyback Converter Buck-Boost Double-Ended Flyback Converter Buck-Boost Series Parallel Flyback Converter Buck-Boost Parallel Flyback Converter Buck-Boost Forward Converter Buck-Boost Double-Ended Forward Converter Buck-Boost Series Parallel Forward Converter Buck-Boost Parallel Forward Converter Buck-Boost Full-Bridge Converter Buck-Boost Half-Bridge Converter Buck-Boost Push-Pull Converter Flyback Forward Converter Flyback Full-Bridge Converter Flyback Half-Bridge Converter Flyback Push-Pull Converter 91 References 92 Chapter 8 Other Types of Integrated Topologies Other Types of Integrated Topologies Buck-Buck Converter Buck-Buck-Boost Converter Buck-Zeta Converter Buck-Boost-Buck-Boost Converter Zeta-Buck-Boost Converter Zeta-Zeta Converter Boost-Boost Converter Boost-Cuk Converter Boost-SEPIC Converter Cuk-Cuk Converter SEPIC-Cuk Converter SEPIC-SEPIC Converter Flyback Forward Converter 100

5 x Contents 8.15 Boost Forward Converter 101 References 101 Chapter 9 Steady-State Analysis Small Ripple Approximation, Inductor Voltage-Second Balance, and Capacitor Charge Balance Small Ripple Approximation Inductor Voltage-Second Balance Principle Capacitor Charge Balance Principle BIFRED Converter Example 105 References 114 Chapter 10 Dynamic Analysis Methodology Buck Integrated Forward Converter Example 115 References 144 Chapter 11 Synchronous Rectification Selection Criteria for Schottky Diode and MOSFET Synchronous Rectification with Basic Switching Power Supply Topologies Buck Converter with Synchronous Rectification Synchronous Boost Converter Synchronous Buck-Boost Converter Control of Synchronous Rectifier Current-Mode Control Methods Discrete and Integrated Approach for Synchronous Rectification Comparison of Diode and Synchronous Rectifiers Simulation Results 156 References 159 Chapter 12 Synchronous Rectification with Flyback and Forward Converters Synchronous Rectification in the Flyback Converter Constant-Frequency Continuous Conduction Mode Flyback Converter with Constant-Frequency Discontinuous Conduction Mode Flyback Converter with Variable-Frequency Discontinuous Conduction Mode Flyback Converter with VF DCM Zero-Voltage Switching Synchronous Rectification in Forward Converter 171

6 Contents XI Forward Converter with RCD Clamp and Self-Driven SRs Forward Converter with Active Clamp and Self- Driven SRs Forward Converter with Control-Driven SRs Simulation Results Summary 179 References 183 Chapter 13 Synchronous Rectification for Integrated High- Quality Rectifier-Regulators Synchronous Rectification for IHQRRs Synchronous Rectified BIFRED Operation of Synchronous BIFRED Synchronous Rectified BIBRED Control of Synchronous IHQRRs General Efficiency Considerations of IHQRRs Comparison of Power Losses in Schottky and Synchronous IHQRRs Simulation Results and Observations Summary 204 References 207 Chapter 14 Integrated Switched-Mode Power Supplies Applications Integrated Switched-Mode Power Converters for UPS Applications Normal Operating Mode Battery Charge Regulation Mode Backup Mode Control Strategy Integrated Switched-Mode Power Converters for Switched Reluctance Motor Drives 219 References 223 Chapter 15 Review of Digital Control Techniques in Power Electronics Advantages of Digital Control Integration Performance Disadvantages of Digital Control and New Trends Limited Analog-to-Digital Conversion Resolution and Range 227

7 XII Contents Limited Digital PWM Resolution Steady-State Oscillations (Limit Cycles) Inherent Time Delay Structure of Digital Controllers Digital Design Digital via Emulation Direct Digital Approach Root Locus Approach Bode Plot or Frequency Response Approach Deadbeat Control Raggazini's Controller Design Method State-Space Design State Feedback Design (Control Law Design) State Estimator Design (Estimator Design) Digital Control Techniques Digital Current Mode Control Predictive Control Sliding Mode Control Space Vector Control Fuzzy Control Pulse Train Control Method Applications of Digital Control Pulse Width Modulation Naturally Sampled PWM Regularly Sampled PWM Randomly Sampled PWM Motor Drives Power Factor Correction Standby Power Supply with Active Power Filter Ability Distributed Power Systems DC-DC Converters Electronic Ballasts Implementation of Digital Controllers Summary 266 References 266 Chapter 16 Implementation of Digital Control Using Digital Signal Processors Introduction to Implementation of Digital Control Based on DSPs Basic Concepts of DSPs from Hardware and Software Points of View 274

8 Contents xiii Specifications of Desired System Functional Requirements of Non-inverting Buck-Boost Converter Modeling and State Block Diagram of Converter Control Flow Based on State Block Diagram Selection of DSP and u-controller Guidelines for DSP Selection Selection of DSP Chip Detailed Datasheets and Manuals Internal Architecture and Electric Specifications Software Development Environment (Assembler, Compiler, Linker, and Downloader) Commercial DSP Starter Kit Application Notes Hardware Schematic Design of Non-inverting Buck-Boost Converter and DSP Control Board Schematic for Non-inverting Buck-Boost Converter Selected DSP Chip Connectivity Analog and Digital Signal Interface Low Voltage Power and DSP Chip Reset Circuit Boot Mode Selecting Circuit RS-232 Serial Communication Circuit Serial Interface with D/A Converter, EEPROM, and JLAG Port Software Implementation for Control System Defining Program Module Diagram According to Functionalities (or Lasks) Link Command File Start-up Code Header Files and Module to Define Special Function Registers Construction of Control Flow Chart for Controller Composing Source Codes for Non-inverting Buck- Boost Converter Making and Running Executable Code File Testing Operation of Non-inverting Buck-Boost Converter Summary 319 References 327 Index 331

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