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Sneak Circuits of Power Electronic Converters Sneak Circuits of Power Electronic Converters Work on sneak circuits and related analysis methods for power converters contributes to the reliability of power electronic systems worldwide. Most books on the subject focus on electronic systems; this book is perhaps the first to examine power electronic systems. The authors describe sneak circuit phenomena in power converters, introduce SCA methods for power electronic systems, and propose how to eliminate and make use of sneak circuits. This book: * highlights the advanced research works in sneak…mehr
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Sneak Circuits of Power Electronic Converters Sneak Circuits of Power Electronic Converters Work on sneak circuits and related analysis methods for power converters contributes to the reliability of power electronic systems worldwide. Most books on the subject focus on electronic systems; this book is perhaps the first to examine power electronic systems. The authors describe sneak circuit phenomena in power converters, introduce SCA methods for power electronic systems, and propose how to eliminate and make use of sneak circuits. This book: * highlights the advanced research works in sneak circuit analysis by a leading author in the field * is original in its treatment of power electronics converters, going beyond the electronic system level * is suitable for both introductory and advanced levels * offers guidelines for industry professionals involved in the design of power electronic systems, enabling early detection of potential problems This book is geared for researchers and graduate students in electrical engineering, as well as engineers and researchers in power electronics. Researchers in power electronics reliability will also find it to be a helpful resource.
Produktdetails
- Produktdetails
- Verlag: John Wiley & Sons
- Seitenzahl: 304
- Erscheinungstermin: 31. Oktober 2014
- Englisch
- ISBN-13: 9781118379974
- Artikelnr.: 41821668
- Verlag: John Wiley & Sons
- Seitenzahl: 304
- Erscheinungstermin: 31. Oktober 2014
- Englisch
- ISBN-13: 9781118379974
- Artikelnr.: 41821668
Bo Zhang South China University of Technology, P. R. China. Dongyuan Qiu South China University of Technology, P. R. China.
Chapter 1 Sneak Circuit and Power Electronic System 1 1.1 Reliability of power electronic system 1 1.2 Sneak circuit 3 1.3 Sneak circuit analysis 12 1.4 Power electronic system and sneak circuit analysis 19 1.5 Arrangement of this book 20 References 21 Chapter 2 Sneak Circuits of Resonant Switched CapacitorConverters 23 2.1 Sneak circuits of basic RSC converter 23 2.2 Sneak circuits of high-order RSC converter 47 2.3 Summary 70 References 70 Chapter 3 Sneak Circuits of DC-DC Converters 73 3.1 Buck converter 73 3.2 Boost converter 78 3.3 Buck-boost converter 82 3.4 Sneak circuit conditions of Buck, Boost and Buck-Boostconverters 86 3.5 Cúk converter 88 3.6 Sepic converter 102 3.7 Zeta converter 113 3.8 Sneak circuit conditions of Cúk, Sepic and Zeta converters123 3.9 Summary 125 References 126 Chapter 4 Sneak Circuits of Soft-switching Converters127 4.1 Sneak circuits of Full-bridge ZVS PWM converter 127 4.2 Sneak circuits of Buck ZVS Multi-Resonant converter 149 4.3 Sneak circuits of Buck ZVT PWM converter 157 4.4 Summary 167 References 168 Chapter 5 Sneak Circuits of other Power ElectronicConverters 169 5.1 Sneak circuits of Z-source inverter 169 5.2 Sneak circuits of synchronous DC-DC converters 180 5.3 Summary 191 References 191 Chapter 6 Sneak Circuit Path Analysis Method for PowerElectronic Converters 193 6.1 Basic concepts 193 6.2 Sneak circuit analysis based on adjacency matrix 204 6.3 Sneak circuit analysis based on connection matrix 216 6.4 Sneak circuit analysis based on switching Boolean matrix228 6.5 Comparison of the sneak circuit path analysis methods 240 6.6 Summary 241 References 241 Chapter 7 Sneak Circuit Mode Analysis Method for PowerElectronic Converters 243 7.1 Mesh combination analytical method 244 7.2 Sneak operating unit analytical method 250 7.3 Sneak circuit operating mode analytical method 257 7.4 Results of sneak circuit mode analysis method on Cúkconverter 268 7.5 Summary 269 References 270 Chapter 8 Elimination of Sneak Circuits in Power ElectronicConverters 272 8.1 Sneak circuit elimination for resonant switched capacitorconverters 273 8.2 Sneak circuit elimination for Z-source inverter 280 8.3 Sneak circuit elimination for Buck ZVT PWM converter 285 8.4 Summary 294 References 294 Chapter 9 Application of Sneak Circuits in Power ElectronicConverters 296 9.1 Improvement of power electronic converter based on sneakcircuits 296 9.2 Reconstruction of power electronic converter based on sneakcircuits 307 9.3 New functions of power electronic converter based on sneakcircuits 315 9.4 Fault analysis of power electronic converter based on sneakcircuits 323 9.5 Summary 336 References 336
About the Authors xi Preface xiii Acknowledgments xvii 1 Sneak Circuit and
Power Electronic Systems 1 1.1 Reliability of Power Electronic Systems 1
1.2 Sneak Circuit 2 1.2.1 Definition of Sneak Circuit 2 1.2.2 Examples of
Sneak Circuits 3 1.2.3 Basic Causes of Sneak Circuit 9 1.3 Sneak Circuit
Analysis 10 1.3.1 Definition of Sneak Circuit Analysis 10 1.3.2 History of
Sneak Circuit Analysis 10 1.3.3 Methods of Sneak Circuit Analysis 11 1.3.4
Benefits of Sneak Circuit Analysis 12 1.3.5 Relationship between Sneak
Circuit Analysis and other Safety Techniques 13 1.4 Power Electronic System
and Sneak Circuit Analysis 14 1.5 Arrangement of this Book 15 References 15
Part I SNEAK CIRCUIT PHENOMENA 2 Sneak Circuits of Resonant Switched
Capacitor Converters 19 2.1 Introduction 19 2.2 Sneak Circuits of Basic RSC
Converter 19 2.2.1 Sneak Circuits of Basic Step-Down RSC Converter 20 2.2.2
Sneak Circuits of Basic Step-Up RSC Converter 27 2.2.3 Sneak Circuits of
Basic Inverting RSC Converter 34 2.2.4 Sneak Circuit Performance of Basic
RSC Converters 37 2.3 Sneak Circuits of High-Order RSC Converter 37 2.3.1
Sneak Circuits of High-Order Step-Down RSC Converter 38 2.3.2 Sneak
Circuits of High-Order Step-Up RSC Converter 47 2.4 Summary 57 References
57 3 Sneak Circuits of DC-DC Converters 59 3.1 Introduction 59 3.2 Buck
Converter 59 3.2.1 CCM of Buck Converter 59 3.2.2 DCM of Buck Converter 61
3.2.3 Operating Conditions of Buck Converter 62 3.3 Boost Converter 63
3.3.1 CCM of Boost Converter 63 3.3.2 DCM of Boost Converter 65 3.3.3
Operating Conditions of Boost Converter 66 3.4 Buck-Boost Converter 67
3.4.1 CCM of Buck-Boost Converter 67 3.4.2 DCM of Buck-Boost Converter 68
3.4.3 Operating Conditions of Buck-Boost Converter 70 3.5 Sneak Circuit
Conditions of Buck, Boost, and Buck-Boost Converters 71 3.6 Cúk Converter
71 3.6.1 Normal Operating Mode of Cúk Converter 71 3.6.2 Sneak Circuit
Phenomena of Cúk Converter 74 3.6.3 Experimental Verification of Cúk
Converter 81 3.7 Sepic Converter 84 3.7.1 Normal Operating Mode of Sepic
Converter 84 3.7.2 Sneak Circuit Phenomena of Sepic Converter 89 3.7.3
Experimental Verification of Sepic Converter 91 3.8 Zeta Converter 91 3.8.1
Normal Operating Mode of Zeta Converter 94 3.8.2 Sneak Circuit Phenomena of
Zeta Converter 98 3.8.3 Experimental Verification of Zeta Converter 100 3.9
Sneak Circuit Conditions of Cúk, Sepic, and Zeta Converters 102 3.10
Summary 103 References 103 4 Sneak Circuits of Soft-Switching Converters
105 4.1 Introduction 105 4.2 Sneak Circuits of Full-Bridge ZVS PWM
Converter 105 4.2.1 Normal Operating Mode of FB ZVS PWM Converter 106 4.2.2
Zero Voltage Switching Conditions of FB ZVS PWM Converter 112 4.2.3 Sneak
Circuit Phenomena of FB ZVS PWM Converter 112 4.2.4 Operating Conditions of
FB ZVS PWM Converter 118 4.2.5 Experimental Verification of FB ZVS PWM
Converter 119 4.3 Sneak Circuits of Buck ZVS Multi-Resonant Converter 122
4.3.1 Normal Operating Mode of Buck ZVS MR Converter 123 4.3.2 Sneak
Circuit Phenomenon of Buck ZVS MR Converter 126 4.3.3 Simulation
Verification of Buck ZVS MR Converter 128 4.4 Sneak Circuits of Buck ZVT
PWM Converter 128 4.4.1 Normal Operating Mode of Buck ZVT PWM Converter 130
4.4.2 Sneak Circuit Phenomenon of Buck ZVT PWM Converter 133 4.4.3
Simulation Verification of Buck ZVT PWM Converter 136 4.5 Summary 137
References 137 5 Sneak Circuits of other Power Electronic Converters 139
5.1 Introduction 139 5.2 Sneak Circuits of Z-Source Inverter 139 5.2.1
Operating Principles of Z-Source Inverter 140 5.2.2 Sneak Circuits of
Z-Source Inverter 144 5.2.3 Simulation Verification of Z-Source Inverter
147 5.3 Sneak Circuits of Synchronous DC-DC Converters 148 5.3.1 Equivalent
Circuit of Synchronous Buck Converter 149 5.3.2 Normal Operating Principle
of Synchronous Buck Converter 150 5.3.3 Sneak Circuits of Synchronous Buck
Converter 152 5.3.4 Sneak Circuit Condition of Synchronous Buck Converter
154 5.3.5 Simulation Verification of Synchronous Buck Converter 155 5.4
Summary 156 References 157 Part II SNEAK CIRCUIT ANALYSIS METHODS 6 Sneak
Circuit Path Analysis Method for Power Electronic Converters 161 6.1
Introduction 161 6.2 Basic Concepts 161 6.2.1 Directed Graph 161 6.2.2
Adjacency Matrix 162 6.2.3 Connection Matrix 164 6.2.4 Switching Function
and Transfer Matrix 166 6.2.5 Switching Network and Switching Boolean
Matrix 167 6.3 Sneak Circuit Path Analysis Based on Adjacency Matrix 169
6.3.1 Directed Graph and Adjacency Matrix of Power Electronic Converter 169
6.3.2 Searching Algorithms 170 6.3.3 Current Path Search in Power
Electronic Converter 173 6.3.4 Sneak Circuit Path Judgment in Power
Electronic Converter 174 6.3.5 Sneak Circuit Path Analysis Software Based
on Adjacency Matrix 174 6.4 Sneak Circuit Path Analysis Based on Connection
Matrix 178 6.4.1 Generalized Connection Matrix of Power Electronic
Converter 178 6.4.2 Identification of False Current Loop 179 6.4.3 Example
181 6.4.4 Sneak Circuit Loop Analysis Software Based on Connection Matrix
184 6.5 Sneak Circuit Path Analysis Based on Switching Boolean Matrix 184
6.5.1 Switching Boolean Matrix of Power Electronic Converter 184 6.5.2
Invalid Switching Vector Criteria 190 6.5.3 Example 191 6.5.4 Sneak Circuit
Path Analysis Software Based on Switching Boolean Matrix 194 6.6 Comparison
of Three Sneak Circuit Path Analysis Methods 196 6.7 Summary 197 References
197 7 Sneak Circuit Mode Analysis Method for Power Electronic Converters
199 7.1 Introduction 199 7.2 Mesh Combination Analytical Method 200 7.2.1
Mesh and Connecting Piece 200 7.2.2 Basic Graph Algorithms 200 7.2.3 Mesh
Combination Method 201 7.3 Sneak Operating Unit Analytical Method 204 7.3.1
Mesh Combination Results of Cúk Converter 204 7.3.2 Effective Operating
Units of Cúk Converter 205 7.3.3 Sneak Operating Units of Cúk Converter 209
7.4 Sneak Circuit Operating Mode Analytical Method 210 7.4.1 Sneak Circuit
Phenomenon of Cúk Converter Caused by Variations of Topology 211 7.4.2
Sneak Circuit Phenomenon of Cúk Converter Caused by Changing of Current
Direction 212 7.5 Results of Sneak Circuit Mode Analysis Method on Cúk
Converter 216 7.6 Summary 219 References 220 Part III ELIMINATION AND
APPLICATION OF SNEAK CIRCUITS 8 Elimination of Sneak Circuits in Power
Electronic Converters 223 8.1 Introduction 223 8.2 Sneak Circuit
Elimination for RSC Converters 224 8.2.1 Parameter Design Principle 224
8.2.2 Topology Improvement Scheme 225 8.2.3 Examples 227 8.3 Sneak Circuit
Elimination for Z-Source Inverter 230 8.3.1 Restricted Operating Conditions
230 8.3.2 Topology Improvement 230 8.4 Sneak Circuit Elimination for Buck
ZVT PWM Converter 233 8.4.1 Topology Improving Scheme I 234 8.4.2 Topology
Improving Scheme II 236 8.4.3 Simulation Verification 240 8.5 Summary 240
References 241 9 Application of Sneak Circuits in Power Electronic
Converters 243 9.1 Introduction 243 9.2 Improvement of Power Electronic
Converter Based on Sneak Circuits 243 9.2.1 Operating Principle of Boost
ZCT PWM Converter 243 9.2.2 Sneak Circuit Paths of Boost ZCT PWM Converter
247 9.2.3 The Improved Control Method of Boost ZCT PWM Converter 248 9.3
Reconstruction of Power Electronic Converter Based on Sneak Circuits 252
9.3.1 Structure of Boost ZCT PWM Converter 253 9.3.2 Performance of the
Modified Boost ZCT PWM Converter 253 9.4 New Functions of Power Electronic
Converter Based on Sneak Circuits 258 9.4.1 PFC Principle of Cúk Converter
258 9.4.2 PFC Implementation of Cúk Converter 262 9.5 Fault Analysis of
Power Electronic Converter Based on Sneak Circuits 264 9.5.1 Adjacency
Matrix of Diode-Clamped Three-Level HB Inverter 265 9.5.2 Electrical
Characteristics of Diode-Clamped Three-Level HB Inverter 267 9.5.3 Failure
Criterion of Diode-Clamped Three-Level HB Inverter 268 9.5.4 Simulation
Verification of Diode-Clamped Three-Level HB Inverter 271 9.6 Summary 272
References 274 Index 277
Power Electronic Systems 1 1.1 Reliability of Power Electronic Systems 1
1.2 Sneak Circuit 2 1.2.1 Definition of Sneak Circuit 2 1.2.2 Examples of
Sneak Circuits 3 1.2.3 Basic Causes of Sneak Circuit 9 1.3 Sneak Circuit
Analysis 10 1.3.1 Definition of Sneak Circuit Analysis 10 1.3.2 History of
Sneak Circuit Analysis 10 1.3.3 Methods of Sneak Circuit Analysis 11 1.3.4
Benefits of Sneak Circuit Analysis 12 1.3.5 Relationship between Sneak
Circuit Analysis and other Safety Techniques 13 1.4 Power Electronic System
and Sneak Circuit Analysis 14 1.5 Arrangement of this Book 15 References 15
Part I SNEAK CIRCUIT PHENOMENA 2 Sneak Circuits of Resonant Switched
Capacitor Converters 19 2.1 Introduction 19 2.2 Sneak Circuits of Basic RSC
Converter 19 2.2.1 Sneak Circuits of Basic Step-Down RSC Converter 20 2.2.2
Sneak Circuits of Basic Step-Up RSC Converter 27 2.2.3 Sneak Circuits of
Basic Inverting RSC Converter 34 2.2.4 Sneak Circuit Performance of Basic
RSC Converters 37 2.3 Sneak Circuits of High-Order RSC Converter 37 2.3.1
Sneak Circuits of High-Order Step-Down RSC Converter 38 2.3.2 Sneak
Circuits of High-Order Step-Up RSC Converter 47 2.4 Summary 57 References
57 3 Sneak Circuits of DC-DC Converters 59 3.1 Introduction 59 3.2 Buck
Converter 59 3.2.1 CCM of Buck Converter 59 3.2.2 DCM of Buck Converter 61
3.2.3 Operating Conditions of Buck Converter 62 3.3 Boost Converter 63
3.3.1 CCM of Boost Converter 63 3.3.2 DCM of Boost Converter 65 3.3.3
Operating Conditions of Boost Converter 66 3.4 Buck-Boost Converter 67
3.4.1 CCM of Buck-Boost Converter 67 3.4.2 DCM of Buck-Boost Converter 68
3.4.3 Operating Conditions of Buck-Boost Converter 70 3.5 Sneak Circuit
Conditions of Buck, Boost, and Buck-Boost Converters 71 3.6 Cúk Converter
71 3.6.1 Normal Operating Mode of Cúk Converter 71 3.6.2 Sneak Circuit
Phenomena of Cúk Converter 74 3.6.3 Experimental Verification of Cúk
Converter 81 3.7 Sepic Converter 84 3.7.1 Normal Operating Mode of Sepic
Converter 84 3.7.2 Sneak Circuit Phenomena of Sepic Converter 89 3.7.3
Experimental Verification of Sepic Converter 91 3.8 Zeta Converter 91 3.8.1
Normal Operating Mode of Zeta Converter 94 3.8.2 Sneak Circuit Phenomena of
Zeta Converter 98 3.8.3 Experimental Verification of Zeta Converter 100 3.9
Sneak Circuit Conditions of Cúk, Sepic, and Zeta Converters 102 3.10
Summary 103 References 103 4 Sneak Circuits of Soft-Switching Converters
105 4.1 Introduction 105 4.2 Sneak Circuits of Full-Bridge ZVS PWM
Converter 105 4.2.1 Normal Operating Mode of FB ZVS PWM Converter 106 4.2.2
Zero Voltage Switching Conditions of FB ZVS PWM Converter 112 4.2.3 Sneak
Circuit Phenomena of FB ZVS PWM Converter 112 4.2.4 Operating Conditions of
FB ZVS PWM Converter 118 4.2.5 Experimental Verification of FB ZVS PWM
Converter 119 4.3 Sneak Circuits of Buck ZVS Multi-Resonant Converter 122
4.3.1 Normal Operating Mode of Buck ZVS MR Converter 123 4.3.2 Sneak
Circuit Phenomenon of Buck ZVS MR Converter 126 4.3.3 Simulation
Verification of Buck ZVS MR Converter 128 4.4 Sneak Circuits of Buck ZVT
PWM Converter 128 4.4.1 Normal Operating Mode of Buck ZVT PWM Converter 130
4.4.2 Sneak Circuit Phenomenon of Buck ZVT PWM Converter 133 4.4.3
Simulation Verification of Buck ZVT PWM Converter 136 4.5 Summary 137
References 137 5 Sneak Circuits of other Power Electronic Converters 139
5.1 Introduction 139 5.2 Sneak Circuits of Z-Source Inverter 139 5.2.1
Operating Principles of Z-Source Inverter 140 5.2.2 Sneak Circuits of
Z-Source Inverter 144 5.2.3 Simulation Verification of Z-Source Inverter
147 5.3 Sneak Circuits of Synchronous DC-DC Converters 148 5.3.1 Equivalent
Circuit of Synchronous Buck Converter 149 5.3.2 Normal Operating Principle
of Synchronous Buck Converter 150 5.3.3 Sneak Circuits of Synchronous Buck
Converter 152 5.3.4 Sneak Circuit Condition of Synchronous Buck Converter
154 5.3.5 Simulation Verification of Synchronous Buck Converter 155 5.4
Summary 156 References 157 Part II SNEAK CIRCUIT ANALYSIS METHODS 6 Sneak
Circuit Path Analysis Method for Power Electronic Converters 161 6.1
Introduction 161 6.2 Basic Concepts 161 6.2.1 Directed Graph 161 6.2.2
Adjacency Matrix 162 6.2.3 Connection Matrix 164 6.2.4 Switching Function
and Transfer Matrix 166 6.2.5 Switching Network and Switching Boolean
Matrix 167 6.3 Sneak Circuit Path Analysis Based on Adjacency Matrix 169
6.3.1 Directed Graph and Adjacency Matrix of Power Electronic Converter 169
6.3.2 Searching Algorithms 170 6.3.3 Current Path Search in Power
Electronic Converter 173 6.3.4 Sneak Circuit Path Judgment in Power
Electronic Converter 174 6.3.5 Sneak Circuit Path Analysis Software Based
on Adjacency Matrix 174 6.4 Sneak Circuit Path Analysis Based on Connection
Matrix 178 6.4.1 Generalized Connection Matrix of Power Electronic
Converter 178 6.4.2 Identification of False Current Loop 179 6.4.3 Example
181 6.4.4 Sneak Circuit Loop Analysis Software Based on Connection Matrix
184 6.5 Sneak Circuit Path Analysis Based on Switching Boolean Matrix 184
6.5.1 Switching Boolean Matrix of Power Electronic Converter 184 6.5.2
Invalid Switching Vector Criteria 190 6.5.3 Example 191 6.5.4 Sneak Circuit
Path Analysis Software Based on Switching Boolean Matrix 194 6.6 Comparison
of Three Sneak Circuit Path Analysis Methods 196 6.7 Summary 197 References
197 7 Sneak Circuit Mode Analysis Method for Power Electronic Converters
199 7.1 Introduction 199 7.2 Mesh Combination Analytical Method 200 7.2.1
Mesh and Connecting Piece 200 7.2.2 Basic Graph Algorithms 200 7.2.3 Mesh
Combination Method 201 7.3 Sneak Operating Unit Analytical Method 204 7.3.1
Mesh Combination Results of Cúk Converter 204 7.3.2 Effective Operating
Units of Cúk Converter 205 7.3.3 Sneak Operating Units of Cúk Converter 209
7.4 Sneak Circuit Operating Mode Analytical Method 210 7.4.1 Sneak Circuit
Phenomenon of Cúk Converter Caused by Variations of Topology 211 7.4.2
Sneak Circuit Phenomenon of Cúk Converter Caused by Changing of Current
Direction 212 7.5 Results of Sneak Circuit Mode Analysis Method on Cúk
Converter 216 7.6 Summary 219 References 220 Part III ELIMINATION AND
APPLICATION OF SNEAK CIRCUITS 8 Elimination of Sneak Circuits in Power
Electronic Converters 223 8.1 Introduction 223 8.2 Sneak Circuit
Elimination for RSC Converters 224 8.2.1 Parameter Design Principle 224
8.2.2 Topology Improvement Scheme 225 8.2.3 Examples 227 8.3 Sneak Circuit
Elimination for Z-Source Inverter 230 8.3.1 Restricted Operating Conditions
230 8.3.2 Topology Improvement 230 8.4 Sneak Circuit Elimination for Buck
ZVT PWM Converter 233 8.4.1 Topology Improving Scheme I 234 8.4.2 Topology
Improving Scheme II 236 8.4.3 Simulation Verification 240 8.5 Summary 240
References 241 9 Application of Sneak Circuits in Power Electronic
Converters 243 9.1 Introduction 243 9.2 Improvement of Power Electronic
Converter Based on Sneak Circuits 243 9.2.1 Operating Principle of Boost
ZCT PWM Converter 243 9.2.2 Sneak Circuit Paths of Boost ZCT PWM Converter
247 9.2.3 The Improved Control Method of Boost ZCT PWM Converter 248 9.3
Reconstruction of Power Electronic Converter Based on Sneak Circuits 252
9.3.1 Structure of Boost ZCT PWM Converter 253 9.3.2 Performance of the
Modified Boost ZCT PWM Converter 253 9.4 New Functions of Power Electronic
Converter Based on Sneak Circuits 258 9.4.1 PFC Principle of Cúk Converter
258 9.4.2 PFC Implementation of Cúk Converter 262 9.5 Fault Analysis of
Power Electronic Converter Based on Sneak Circuits 264 9.5.1 Adjacency
Matrix of Diode-Clamped Three-Level HB Inverter 265 9.5.2 Electrical
Characteristics of Diode-Clamped Three-Level HB Inverter 267 9.5.3 Failure
Criterion of Diode-Clamped Three-Level HB Inverter 268 9.5.4 Simulation
Verification of Diode-Clamped Three-Level HB Inverter 271 9.6 Summary 272
References 274 Index 277
Chapter 1 Sneak Circuit and Power Electronic System 1 1.1 Reliability of power electronic system 1 1.2 Sneak circuit 3 1.3 Sneak circuit analysis 12 1.4 Power electronic system and sneak circuit analysis 19 1.5 Arrangement of this book 20 References 21 Chapter 2 Sneak Circuits of Resonant Switched CapacitorConverters 23 2.1 Sneak circuits of basic RSC converter 23 2.2 Sneak circuits of high-order RSC converter 47 2.3 Summary 70 References 70 Chapter 3 Sneak Circuits of DC-DC Converters 73 3.1 Buck converter 73 3.2 Boost converter 78 3.3 Buck-boost converter 82 3.4 Sneak circuit conditions of Buck, Boost and Buck-Boostconverters 86 3.5 Cúk converter 88 3.6 Sepic converter 102 3.7 Zeta converter 113 3.8 Sneak circuit conditions of Cúk, Sepic and Zeta converters123 3.9 Summary 125 References 126 Chapter 4 Sneak Circuits of Soft-switching Converters127 4.1 Sneak circuits of Full-bridge ZVS PWM converter 127 4.2 Sneak circuits of Buck ZVS Multi-Resonant converter 149 4.3 Sneak circuits of Buck ZVT PWM converter 157 4.4 Summary 167 References 168 Chapter 5 Sneak Circuits of other Power ElectronicConverters 169 5.1 Sneak circuits of Z-source inverter 169 5.2 Sneak circuits of synchronous DC-DC converters 180 5.3 Summary 191 References 191 Chapter 6 Sneak Circuit Path Analysis Method for PowerElectronic Converters 193 6.1 Basic concepts 193 6.2 Sneak circuit analysis based on adjacency matrix 204 6.3 Sneak circuit analysis based on connection matrix 216 6.4 Sneak circuit analysis based on switching Boolean matrix228 6.5 Comparison of the sneak circuit path analysis methods 240 6.6 Summary 241 References 241 Chapter 7 Sneak Circuit Mode Analysis Method for PowerElectronic Converters 243 7.1 Mesh combination analytical method 244 7.2 Sneak operating unit analytical method 250 7.3 Sneak circuit operating mode analytical method 257 7.4 Results of sneak circuit mode analysis method on Cúkconverter 268 7.5 Summary 269 References 270 Chapter 8 Elimination of Sneak Circuits in Power ElectronicConverters 272 8.1 Sneak circuit elimination for resonant switched capacitorconverters 273 8.2 Sneak circuit elimination for Z-source inverter 280 8.3 Sneak circuit elimination for Buck ZVT PWM converter 285 8.4 Summary 294 References 294 Chapter 9 Application of Sneak Circuits in Power ElectronicConverters 296 9.1 Improvement of power electronic converter based on sneakcircuits 296 9.2 Reconstruction of power electronic converter based on sneakcircuits 307 9.3 New functions of power electronic converter based on sneakcircuits 315 9.4 Fault analysis of power electronic converter based on sneakcircuits 323 9.5 Summary 336 References 336
About the Authors xi Preface xiii Acknowledgments xvii 1 Sneak Circuit and
Power Electronic Systems 1 1.1 Reliability of Power Electronic Systems 1
1.2 Sneak Circuit 2 1.2.1 Definition of Sneak Circuit 2 1.2.2 Examples of
Sneak Circuits 3 1.2.3 Basic Causes of Sneak Circuit 9 1.3 Sneak Circuit
Analysis 10 1.3.1 Definition of Sneak Circuit Analysis 10 1.3.2 History of
Sneak Circuit Analysis 10 1.3.3 Methods of Sneak Circuit Analysis 11 1.3.4
Benefits of Sneak Circuit Analysis 12 1.3.5 Relationship between Sneak
Circuit Analysis and other Safety Techniques 13 1.4 Power Electronic System
and Sneak Circuit Analysis 14 1.5 Arrangement of this Book 15 References 15
Part I SNEAK CIRCUIT PHENOMENA 2 Sneak Circuits of Resonant Switched
Capacitor Converters 19 2.1 Introduction 19 2.2 Sneak Circuits of Basic RSC
Converter 19 2.2.1 Sneak Circuits of Basic Step-Down RSC Converter 20 2.2.2
Sneak Circuits of Basic Step-Up RSC Converter 27 2.2.3 Sneak Circuits of
Basic Inverting RSC Converter 34 2.2.4 Sneak Circuit Performance of Basic
RSC Converters 37 2.3 Sneak Circuits of High-Order RSC Converter 37 2.3.1
Sneak Circuits of High-Order Step-Down RSC Converter 38 2.3.2 Sneak
Circuits of High-Order Step-Up RSC Converter 47 2.4 Summary 57 References
57 3 Sneak Circuits of DC-DC Converters 59 3.1 Introduction 59 3.2 Buck
Converter 59 3.2.1 CCM of Buck Converter 59 3.2.2 DCM of Buck Converter 61
3.2.3 Operating Conditions of Buck Converter 62 3.3 Boost Converter 63
3.3.1 CCM of Boost Converter 63 3.3.2 DCM of Boost Converter 65 3.3.3
Operating Conditions of Boost Converter 66 3.4 Buck-Boost Converter 67
3.4.1 CCM of Buck-Boost Converter 67 3.4.2 DCM of Buck-Boost Converter 68
3.4.3 Operating Conditions of Buck-Boost Converter 70 3.5 Sneak Circuit
Conditions of Buck, Boost, and Buck-Boost Converters 71 3.6 Cúk Converter
71 3.6.1 Normal Operating Mode of Cúk Converter 71 3.6.2 Sneak Circuit
Phenomena of Cúk Converter 74 3.6.3 Experimental Verification of Cúk
Converter 81 3.7 Sepic Converter 84 3.7.1 Normal Operating Mode of Sepic
Converter 84 3.7.2 Sneak Circuit Phenomena of Sepic Converter 89 3.7.3
Experimental Verification of Sepic Converter 91 3.8 Zeta Converter 91 3.8.1
Normal Operating Mode of Zeta Converter 94 3.8.2 Sneak Circuit Phenomena of
Zeta Converter 98 3.8.3 Experimental Verification of Zeta Converter 100 3.9
Sneak Circuit Conditions of Cúk, Sepic, and Zeta Converters 102 3.10
Summary 103 References 103 4 Sneak Circuits of Soft-Switching Converters
105 4.1 Introduction 105 4.2 Sneak Circuits of Full-Bridge ZVS PWM
Converter 105 4.2.1 Normal Operating Mode of FB ZVS PWM Converter 106 4.2.2
Zero Voltage Switching Conditions of FB ZVS PWM Converter 112 4.2.3 Sneak
Circuit Phenomena of FB ZVS PWM Converter 112 4.2.4 Operating Conditions of
FB ZVS PWM Converter 118 4.2.5 Experimental Verification of FB ZVS PWM
Converter 119 4.3 Sneak Circuits of Buck ZVS Multi-Resonant Converter 122
4.3.1 Normal Operating Mode of Buck ZVS MR Converter 123 4.3.2 Sneak
Circuit Phenomenon of Buck ZVS MR Converter 126 4.3.3 Simulation
Verification of Buck ZVS MR Converter 128 4.4 Sneak Circuits of Buck ZVT
PWM Converter 128 4.4.1 Normal Operating Mode of Buck ZVT PWM Converter 130
4.4.2 Sneak Circuit Phenomenon of Buck ZVT PWM Converter 133 4.4.3
Simulation Verification of Buck ZVT PWM Converter 136 4.5 Summary 137
References 137 5 Sneak Circuits of other Power Electronic Converters 139
5.1 Introduction 139 5.2 Sneak Circuits of Z-Source Inverter 139 5.2.1
Operating Principles of Z-Source Inverter 140 5.2.2 Sneak Circuits of
Z-Source Inverter 144 5.2.3 Simulation Verification of Z-Source Inverter
147 5.3 Sneak Circuits of Synchronous DC-DC Converters 148 5.3.1 Equivalent
Circuit of Synchronous Buck Converter 149 5.3.2 Normal Operating Principle
of Synchronous Buck Converter 150 5.3.3 Sneak Circuits of Synchronous Buck
Converter 152 5.3.4 Sneak Circuit Condition of Synchronous Buck Converter
154 5.3.5 Simulation Verification of Synchronous Buck Converter 155 5.4
Summary 156 References 157 Part II SNEAK CIRCUIT ANALYSIS METHODS 6 Sneak
Circuit Path Analysis Method for Power Electronic Converters 161 6.1
Introduction 161 6.2 Basic Concepts 161 6.2.1 Directed Graph 161 6.2.2
Adjacency Matrix 162 6.2.3 Connection Matrix 164 6.2.4 Switching Function
and Transfer Matrix 166 6.2.5 Switching Network and Switching Boolean
Matrix 167 6.3 Sneak Circuit Path Analysis Based on Adjacency Matrix 169
6.3.1 Directed Graph and Adjacency Matrix of Power Electronic Converter 169
6.3.2 Searching Algorithms 170 6.3.3 Current Path Search in Power
Electronic Converter 173 6.3.4 Sneak Circuit Path Judgment in Power
Electronic Converter 174 6.3.5 Sneak Circuit Path Analysis Software Based
on Adjacency Matrix 174 6.4 Sneak Circuit Path Analysis Based on Connection
Matrix 178 6.4.1 Generalized Connection Matrix of Power Electronic
Converter 178 6.4.2 Identification of False Current Loop 179 6.4.3 Example
181 6.4.4 Sneak Circuit Loop Analysis Software Based on Connection Matrix
184 6.5 Sneak Circuit Path Analysis Based on Switching Boolean Matrix 184
6.5.1 Switching Boolean Matrix of Power Electronic Converter 184 6.5.2
Invalid Switching Vector Criteria 190 6.5.3 Example 191 6.5.4 Sneak Circuit
Path Analysis Software Based on Switching Boolean Matrix 194 6.6 Comparison
of Three Sneak Circuit Path Analysis Methods 196 6.7 Summary 197 References
197 7 Sneak Circuit Mode Analysis Method for Power Electronic Converters
199 7.1 Introduction 199 7.2 Mesh Combination Analytical Method 200 7.2.1
Mesh and Connecting Piece 200 7.2.2 Basic Graph Algorithms 200 7.2.3 Mesh
Combination Method 201 7.3 Sneak Operating Unit Analytical Method 204 7.3.1
Mesh Combination Results of Cúk Converter 204 7.3.2 Effective Operating
Units of Cúk Converter 205 7.3.3 Sneak Operating Units of Cúk Converter 209
7.4 Sneak Circuit Operating Mode Analytical Method 210 7.4.1 Sneak Circuit
Phenomenon of Cúk Converter Caused by Variations of Topology 211 7.4.2
Sneak Circuit Phenomenon of Cúk Converter Caused by Changing of Current
Direction 212 7.5 Results of Sneak Circuit Mode Analysis Method on Cúk
Converter 216 7.6 Summary 219 References 220 Part III ELIMINATION AND
APPLICATION OF SNEAK CIRCUITS 8 Elimination of Sneak Circuits in Power
Electronic Converters 223 8.1 Introduction 223 8.2 Sneak Circuit
Elimination for RSC Converters 224 8.2.1 Parameter Design Principle 224
8.2.2 Topology Improvement Scheme 225 8.2.3 Examples 227 8.3 Sneak Circuit
Elimination for Z-Source Inverter 230 8.3.1 Restricted Operating Conditions
230 8.3.2 Topology Improvement 230 8.4 Sneak Circuit Elimination for Buck
ZVT PWM Converter 233 8.4.1 Topology Improving Scheme I 234 8.4.2 Topology
Improving Scheme II 236 8.4.3 Simulation Verification 240 8.5 Summary 240
References 241 9 Application of Sneak Circuits in Power Electronic
Converters 243 9.1 Introduction 243 9.2 Improvement of Power Electronic
Converter Based on Sneak Circuits 243 9.2.1 Operating Principle of Boost
ZCT PWM Converter 243 9.2.2 Sneak Circuit Paths of Boost ZCT PWM Converter
247 9.2.3 The Improved Control Method of Boost ZCT PWM Converter 248 9.3
Reconstruction of Power Electronic Converter Based on Sneak Circuits 252
9.3.1 Structure of Boost ZCT PWM Converter 253 9.3.2 Performance of the
Modified Boost ZCT PWM Converter 253 9.4 New Functions of Power Electronic
Converter Based on Sneak Circuits 258 9.4.1 PFC Principle of Cúk Converter
258 9.4.2 PFC Implementation of Cúk Converter 262 9.5 Fault Analysis of
Power Electronic Converter Based on Sneak Circuits 264 9.5.1 Adjacency
Matrix of Diode-Clamped Three-Level HB Inverter 265 9.5.2 Electrical
Characteristics of Diode-Clamped Three-Level HB Inverter 267 9.5.3 Failure
Criterion of Diode-Clamped Three-Level HB Inverter 268 9.5.4 Simulation
Verification of Diode-Clamped Three-Level HB Inverter 271 9.6 Summary 272
References 274 Index 277
Power Electronic Systems 1 1.1 Reliability of Power Electronic Systems 1
1.2 Sneak Circuit 2 1.2.1 Definition of Sneak Circuit 2 1.2.2 Examples of
Sneak Circuits 3 1.2.3 Basic Causes of Sneak Circuit 9 1.3 Sneak Circuit
Analysis 10 1.3.1 Definition of Sneak Circuit Analysis 10 1.3.2 History of
Sneak Circuit Analysis 10 1.3.3 Methods of Sneak Circuit Analysis 11 1.3.4
Benefits of Sneak Circuit Analysis 12 1.3.5 Relationship between Sneak
Circuit Analysis and other Safety Techniques 13 1.4 Power Electronic System
and Sneak Circuit Analysis 14 1.5 Arrangement of this Book 15 References 15
Part I SNEAK CIRCUIT PHENOMENA 2 Sneak Circuits of Resonant Switched
Capacitor Converters 19 2.1 Introduction 19 2.2 Sneak Circuits of Basic RSC
Converter 19 2.2.1 Sneak Circuits of Basic Step-Down RSC Converter 20 2.2.2
Sneak Circuits of Basic Step-Up RSC Converter 27 2.2.3 Sneak Circuits of
Basic Inverting RSC Converter 34 2.2.4 Sneak Circuit Performance of Basic
RSC Converters 37 2.3 Sneak Circuits of High-Order RSC Converter 37 2.3.1
Sneak Circuits of High-Order Step-Down RSC Converter 38 2.3.2 Sneak
Circuits of High-Order Step-Up RSC Converter 47 2.4 Summary 57 References
57 3 Sneak Circuits of DC-DC Converters 59 3.1 Introduction 59 3.2 Buck
Converter 59 3.2.1 CCM of Buck Converter 59 3.2.2 DCM of Buck Converter 61
3.2.3 Operating Conditions of Buck Converter 62 3.3 Boost Converter 63
3.3.1 CCM of Boost Converter 63 3.3.2 DCM of Boost Converter 65 3.3.3
Operating Conditions of Boost Converter 66 3.4 Buck-Boost Converter 67
3.4.1 CCM of Buck-Boost Converter 67 3.4.2 DCM of Buck-Boost Converter 68
3.4.3 Operating Conditions of Buck-Boost Converter 70 3.5 Sneak Circuit
Conditions of Buck, Boost, and Buck-Boost Converters 71 3.6 Cúk Converter
71 3.6.1 Normal Operating Mode of Cúk Converter 71 3.6.2 Sneak Circuit
Phenomena of Cúk Converter 74 3.6.3 Experimental Verification of Cúk
Converter 81 3.7 Sepic Converter 84 3.7.1 Normal Operating Mode of Sepic
Converter 84 3.7.2 Sneak Circuit Phenomena of Sepic Converter 89 3.7.3
Experimental Verification of Sepic Converter 91 3.8 Zeta Converter 91 3.8.1
Normal Operating Mode of Zeta Converter 94 3.8.2 Sneak Circuit Phenomena of
Zeta Converter 98 3.8.3 Experimental Verification of Zeta Converter 100 3.9
Sneak Circuit Conditions of Cúk, Sepic, and Zeta Converters 102 3.10
Summary 103 References 103 4 Sneak Circuits of Soft-Switching Converters
105 4.1 Introduction 105 4.2 Sneak Circuits of Full-Bridge ZVS PWM
Converter 105 4.2.1 Normal Operating Mode of FB ZVS PWM Converter 106 4.2.2
Zero Voltage Switching Conditions of FB ZVS PWM Converter 112 4.2.3 Sneak
Circuit Phenomena of FB ZVS PWM Converter 112 4.2.4 Operating Conditions of
FB ZVS PWM Converter 118 4.2.5 Experimental Verification of FB ZVS PWM
Converter 119 4.3 Sneak Circuits of Buck ZVS Multi-Resonant Converter 122
4.3.1 Normal Operating Mode of Buck ZVS MR Converter 123 4.3.2 Sneak
Circuit Phenomenon of Buck ZVS MR Converter 126 4.3.3 Simulation
Verification of Buck ZVS MR Converter 128 4.4 Sneak Circuits of Buck ZVT
PWM Converter 128 4.4.1 Normal Operating Mode of Buck ZVT PWM Converter 130
4.4.2 Sneak Circuit Phenomenon of Buck ZVT PWM Converter 133 4.4.3
Simulation Verification of Buck ZVT PWM Converter 136 4.5 Summary 137
References 137 5 Sneak Circuits of other Power Electronic Converters 139
5.1 Introduction 139 5.2 Sneak Circuits of Z-Source Inverter 139 5.2.1
Operating Principles of Z-Source Inverter 140 5.2.2 Sneak Circuits of
Z-Source Inverter 144 5.2.3 Simulation Verification of Z-Source Inverter
147 5.3 Sneak Circuits of Synchronous DC-DC Converters 148 5.3.1 Equivalent
Circuit of Synchronous Buck Converter 149 5.3.2 Normal Operating Principle
of Synchronous Buck Converter 150 5.3.3 Sneak Circuits of Synchronous Buck
Converter 152 5.3.4 Sneak Circuit Condition of Synchronous Buck Converter
154 5.3.5 Simulation Verification of Synchronous Buck Converter 155 5.4
Summary 156 References 157 Part II SNEAK CIRCUIT ANALYSIS METHODS 6 Sneak
Circuit Path Analysis Method for Power Electronic Converters 161 6.1
Introduction 161 6.2 Basic Concepts 161 6.2.1 Directed Graph 161 6.2.2
Adjacency Matrix 162 6.2.3 Connection Matrix 164 6.2.4 Switching Function
and Transfer Matrix 166 6.2.5 Switching Network and Switching Boolean
Matrix 167 6.3 Sneak Circuit Path Analysis Based on Adjacency Matrix 169
6.3.1 Directed Graph and Adjacency Matrix of Power Electronic Converter 169
6.3.2 Searching Algorithms 170 6.3.3 Current Path Search in Power
Electronic Converter 173 6.3.4 Sneak Circuit Path Judgment in Power
Electronic Converter 174 6.3.5 Sneak Circuit Path Analysis Software Based
on Adjacency Matrix 174 6.4 Sneak Circuit Path Analysis Based on Connection
Matrix 178 6.4.1 Generalized Connection Matrix of Power Electronic
Converter 178 6.4.2 Identification of False Current Loop 179 6.4.3 Example
181 6.4.4 Sneak Circuit Loop Analysis Software Based on Connection Matrix
184 6.5 Sneak Circuit Path Analysis Based on Switching Boolean Matrix 184
6.5.1 Switching Boolean Matrix of Power Electronic Converter 184 6.5.2
Invalid Switching Vector Criteria 190 6.5.3 Example 191 6.5.4 Sneak Circuit
Path Analysis Software Based on Switching Boolean Matrix 194 6.6 Comparison
of Three Sneak Circuit Path Analysis Methods 196 6.7 Summary 197 References
197 7 Sneak Circuit Mode Analysis Method for Power Electronic Converters
199 7.1 Introduction 199 7.2 Mesh Combination Analytical Method 200 7.2.1
Mesh and Connecting Piece 200 7.2.2 Basic Graph Algorithms 200 7.2.3 Mesh
Combination Method 201 7.3 Sneak Operating Unit Analytical Method 204 7.3.1
Mesh Combination Results of Cúk Converter 204 7.3.2 Effective Operating
Units of Cúk Converter 205 7.3.3 Sneak Operating Units of Cúk Converter 209
7.4 Sneak Circuit Operating Mode Analytical Method 210 7.4.1 Sneak Circuit
Phenomenon of Cúk Converter Caused by Variations of Topology 211 7.4.2
Sneak Circuit Phenomenon of Cúk Converter Caused by Changing of Current
Direction 212 7.5 Results of Sneak Circuit Mode Analysis Method on Cúk
Converter 216 7.6 Summary 219 References 220 Part III ELIMINATION AND
APPLICATION OF SNEAK CIRCUITS 8 Elimination of Sneak Circuits in Power
Electronic Converters 223 8.1 Introduction 223 8.2 Sneak Circuit
Elimination for RSC Converters 224 8.2.1 Parameter Design Principle 224
8.2.2 Topology Improvement Scheme 225 8.2.3 Examples 227 8.3 Sneak Circuit
Elimination for Z-Source Inverter 230 8.3.1 Restricted Operating Conditions
230 8.3.2 Topology Improvement 230 8.4 Sneak Circuit Elimination for Buck
ZVT PWM Converter 233 8.4.1 Topology Improving Scheme I 234 8.4.2 Topology
Improving Scheme II 236 8.4.3 Simulation Verification 240 8.5 Summary 240
References 241 9 Application of Sneak Circuits in Power Electronic
Converters 243 9.1 Introduction 243 9.2 Improvement of Power Electronic
Converter Based on Sneak Circuits 243 9.2.1 Operating Principle of Boost
ZCT PWM Converter 243 9.2.2 Sneak Circuit Paths of Boost ZCT PWM Converter
247 9.2.3 The Improved Control Method of Boost ZCT PWM Converter 248 9.3
Reconstruction of Power Electronic Converter Based on Sneak Circuits 252
9.3.1 Structure of Boost ZCT PWM Converter 253 9.3.2 Performance of the
Modified Boost ZCT PWM Converter 253 9.4 New Functions of Power Electronic
Converter Based on Sneak Circuits 258 9.4.1 PFC Principle of Cúk Converter
258 9.4.2 PFC Implementation of Cúk Converter 262 9.5 Fault Analysis of
Power Electronic Converter Based on Sneak Circuits 264 9.5.1 Adjacency
Matrix of Diode-Clamped Three-Level HB Inverter 265 9.5.2 Electrical
Characteristics of Diode-Clamped Three-Level HB Inverter 267 9.5.3 Failure
Criterion of Diode-Clamped Three-Level HB Inverter 268 9.5.4 Simulation
Verification of Diode-Clamped Three-Level HB Inverter 271 9.6 Summary 272
References 274 Index 277