Luca Corradini, Dragan Maksimovic, Paolo Mattavelli, Regan Zane

Digital Control of High-Frequency Switched-Mode Power Converters

• Gebundenes Buch

Produktbeschreibung

This book is focused on the fundamental aspects of analysis, modeling and design of digital control loops around high-frequency switched-mode power converters in a systematic and rigorous manner
* Comprehensive treatment of digital control theory for power converters
* Verilog and VHDL sample codes are provided
* Enables readers to successfully analyze, model, design, and implement voltage, current, or multi-loop digital feedback loops around switched-mode power converters
* Practical examples are used throughout the book to illustrate applications of the techniques developed
* Matlab examples are also provided

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Produktdetails

• IEEE Press Series on Power Engineering
• Verlag: Wiley & Sons
• 1. Auflage
• Seitenzahl: 368
• Erscheinungstermin: 13. Juli 2015
• Englisch
• Abmessung: 235mm x 157mm x 24mm
• Gewicht: 690g
• ISBN-13: 9781118935101
• ISBN-10: 1118935101
• Artikelnr.: 41024661

Autorenporträt

Luca Corradini, PhD, is an Assistant Professor at the University of Padova, Italy. He is the co-author of more than fifty articles published in journals and conference proceedings. Dragan Maksimovic, PhD is a Charles V. Schelke Endowed Professor and Director of the Colorado Power Electronics Center (CoPEC) at the University of Colorado at Boulder, USA. Paolo Mattavelli, PhD, joined the DTG of the University of Padova, Italy. Dr. Mattavelli's major fields of interest include analysis, and modeling and control of power converters. Regan Zane, PhD, is a Professor of Electrical and Computer Engineering at the University of Colorado at Boulder, USA. Dr. Zane received the NSF Career Award in 2004 for his work in energy efficient lighting systems.

Inhaltsangabe

PREFACE ix INTRODUCTION 1 CHAPTER 1 CONTINUOUS-TIME AVERAGED MODELING OF
DC-DC CONVERTERS 13 1.1 Pulse Width Modulated Converters 14 1.2 Converters
in Steady State 16 1.2.1 Boost Converter Example 17 1.2.2 Estimation of the
Switching Ripple 19 1.2.3 Voltage Conversion Ratios of Basic Converters 20
1.3 Converter Dynamics and Control 21 1.3.1 Converter Averaging and
Linearization 22 1.3.2 Modeling of the Pulse Width Modulator 24 1.3.3 The
System Loop Gain 25 1.3.4 Averaged Small-Signal Models of Basic Converters
26 1.4 State-Space Averaging 28 1.4.1 Converter Steady-State Operating
Point 28 1.4.2 Averaged Small-Signal State-Space Model 29 1.4.3 Boost
Converter Example 30 1.5 Design Examples 32 1.5.1 Voltage-Mode Control of a
Synchronous Buck Converter 32 1.5.2 Average Current-Mode Control of a Boost
Converter 42 1.6 Duty Ratio d[k] Versus d(t) 48 1.7 Summary of Key Points
50 CHAPTER 2 THE DIGITAL CONTROL LOOP 51 2.1 Case Study: Digital
Voltage-Mode Control 52 2.2 A/D Conversion 53 2.2.1 Sampling Rate 53 2.2.2
Amplitude Quantization 56 2.3 The Digital Compensator 58 2.4 Digital Pulse
Width Modulation 63 2.5 Loop Delays 65 2.5.1 Control Delays 65 2.5.2
Modulation Delay 66 2.5.3 Total Loop Delay 70 2.6 Use of Averaged Models in
Digital Control Design 71 2.6.1 Limitations of Averaged Modeling 71 2.6.2
Averaged Modeling of a Digitally Controlled Converter 74 2.7 Summary of Key
Points 78 CHAPTER 3 DISCRETE-TIME MODELING 79 3.1 Discrete-Time
Small-Signal Modeling 80 3.1.1 A Preliminary Example: A Switched Inductor
82 3.1.2 The General Case 85 3.1.3 Discrete-Time Models for Basic Types of
PWM Modulation 87 3.2 Discrete-Time Modeling Examples 88 3.2.1 Synchronous
Buck Converter 90 3.2.2 Boost Converter 97 3.3 Discrete-Time Modeling of
Time-Invariant Topologies 102 3.3.1 Equivalence to Discrete-Time Modeling
106 3.3.2 Relationship with the Modified Z-Transform 108 3.3.3 Calculation
of Tu(z) 108 3.3.4 Buck Converter Example Revisited 112 3.4 Matlab(r)
Discrete-Time Modeling of Basic Converters 112 3.5 Summary of Key Points
117 CHAPTER 4 DIGITAL CONTROL 119 4.1 System-Level Compensator Design 119
4.1.1 Direct-Digital Design Using the Bilinear Transform Method 120 4.1.2
Digital PID Compensators in the z- and the p-Domains 123 4.2 Design
Examples 126 4.2.1 Digital Voltage-Mode Control of a Synchronous Buck
Converter 126 4.2.2 Digital Current-Mode Control of a Boost Converter 134
4.2.3 Multiloop Control of a Synchronous Buck Converter 136 4.2.4 Boost
Power Factor Corrector 141 4.3 Other Converter Transfer Functions 154 4.4
Actuator Saturation and Integral Anti-Windup Provisions 160 4.5 Summary of
Key Points 165 CHAPTER 5 AMPLITUDE QUANTIZATION 167 5.1 System
Quantizations 167 5.1.1 A/D Converter 167 5.1.2 DPWM Quantization 169 5.2
Steady-State Solution 172 5.3 No-Limit-Cycling Conditions 175 5.3.1 DPWM
versus A/D Resolution 175 5.3.2 Integral Gain 178 5.3.3 Dynamic
Quantization Effects 181 5.4 DPWM and A/D Implementation Techniques 182
5.4.1 DPWM Hardware Implementation Techniques 182 5.4.2 Effective DPWM
Resolution Improvements via SigmaDelta Modulation 186 5.4.3 A/D Converters
187 5.5 Summary of Key Points 190 CHAPTER 6 COMPENSATOR IMPLEMENTATION 191
6.1 PID Compensator Realizations 194 6.2 Coefficient Scaling and
Quantization 197 6.2.1 Coefficients Scaling 198 6.2.2 Coefficients
Quantization 200 6.3 Voltage-Mode Control Example: Coefficients
Quantization 203 6.3.1 Parallel Structure 204 6.3.2 Direct Structure 206
6.3.3 Cascade Structure 208 6.4 Fixed-Point Controller Implementation 213
6.4.1 Effective Dynamic Range and Hardware Dynamic Range 214 6.4.2 Upper
Bound of a Signal and the L1-Norm 216 6.5 Voltage-Mode Converter Example:
Fixed-Point Implementation 218 6.5.1 Parallel Realization 220 6.5.2 Direct
Realization 225 6.5.3 Cascade Realization 229 6.5.4 Linear versus Quantized
System Response 233 6.6 HDL Implementation of the Controller 234 6.6.1 VHDL
Example 235 6.6.2 Verilog Example 237 6.7 Summary of Key Points 239 CHAPTER
7 DIGITAL AUTOTUNING 241 7.1 Introduction to Digital Autotuning 242 7.2
Programmable PID Structures 243 7.3 Autotuning VIA Injection of a Digital
Perturbation 247 7.3.1 Theory of Operation 249 7.3.2 Implementation of a PD
Autotuner 253 7.3.3 Simulation Example 255 7.3.4 Small-Signal Analysis of
the PD Autotuning Loop 261 7.4 Digital Autotuning Based on Relay Feedback
265 7.4.1 Theory of Operation 266 7.4.2 Implementation of a Digital Relay
Feedback Autotuner 267 7.4.3 Simulation Example 271 7.5 Implementation
Issues 272 7.6 Summary of Key Points 275 APPENDIX A DISCRETE-TIME LINEAR
SYSTEMS AND THE Z-TRANSFORM 277 A.1 Difference Equations 277 A.1.1 Forced
Response 278 A.1.2 Free Response 279 A.1.3 Impulse Response and System
Modes 281 A.1.4 Asymptotic Behavior of the Modes 282 A.1.5 Further Examples
283 A.2 Z-Transform 284 A.2.1 Definition 284 A.2.2 Properties 285 A.3 The
Transfer Function 287 A.3.1 Stability 287 A.3.2 Frequency Response 288 A.4
State-Space Representation 288 APPENDIX B FIXED-POINT ARITHMETIC AND HDL
CODING 291 B.1 Rounding Operation and Round-Off Error 291 B.2
Floating-Point versus Fixed-Point Arithmetic Systems 293 B.3 Binary Two's
Complement (B2C) Fixed-Point Representation 294 B.4 Signal Notation 296 B.5
Manipulation of B2C Quantities and HDL Examples 297 B.5.1 Sign Extension
298 B.5.2 Alignment 299 B.5.3 Sign Reversal 301 B.5.4 LSB and MSB
Truncation 302 B.5.5 Addition and Subtraction 304 B.5.6 Multiplication 305
B.5.7 Overflow Detection and Saturated Arithmetic 307 APPENDIX C
SMALL-SIGNAL PHASE LAG OF UNIFORMLY SAMPLED PULSE WIDTH MODULATORS 313 C.1
Trailing-Edge Modulators 313 C.2 Leading-Edge Modulators 317 C.3
Symmetrical Modulators 318 REFERENCES 321 INDEX 335