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Power Magnetic DevicesDiscover a cutting-edge discussion of the design process for power magnetic devicesIn the newly revised second edition of Power Magnetic Devices: A Multi-Objective Design Approach, accomplished engineer and author Dr. Scott D. Sudhoff delivers a thorough exploration of the design principles of power magnetic devices such as inductors, transformers, and rotating electric machinery using a systematic and consistent framework.The book includes new chapters on converter and inverter magnetic components (including three-phase and common-mode inductors) and elaborates on characteristics of power electronics that are required knowledge in magnetics. New chapters on parasitic capacitance and finite element analysis have also been incorporated into the new edition. The work further includes: A thorough introduction to evolutionary computing-based optimization and magnetic analysis techniques Discussions of force and torque production, electromagnet design, and rotating electric machine design Full chapters on high-frequency effects such as skin- and proximity-effect losses, core losses and their characterization, thermal analysis, and parasitic capacitance Treatments of dc-dc converter design, as well as three-phase and common-mode inductor design for inverters An extensive open-source MATLAB code base, PowerPoint slides, and a solutions manual Perfect for practicing power engineers and designers, Power Magnetic Devices will serve as an excellent textbook for advanced undergraduate and graduate courses in electromechanical and electromagnetic design.
List of contents
Author Biography xiii
Preface xv
About the Companion Site xix
1 Optimization-Based Design 1
1.1 Design Approach 1
1.2 Mathematical Properties of Objective Functions 3
1.3 Single-Objective Optimization Using Newton's Method 5
1.4 Genetic Algorithms: Review of Biological Genetics 7
1.5 The Canonical Genetic Algorithm 10
1.6 Real-Coded Genetic Algorithms 15
1.7 Multi-Objective Optimization and the Pareto-Optimal Front 25
1.8 Multi-Objective Optimization Using Genetic Algorithms 27
1.9 Formulation of Fitness Functions for Design Problems 31
1.10 A Design Example 33
References 39
Problems 40
2 Magnetics and Magnetic Equivalent Circuits 43
2.1 Ampere's Law, Magnetomotive Force, and Kirchhoff's MMF Law for Magnetic Circuits 43
2.2 Magnetic Flux, Gauss's Law, and Kirchhoff's Flux Law for Magnetic Circuits 46
2.3 Magnetically Conductive Materials and Ohm's Law For Magnetic Circuits 48
2.4 Construction of the Magnetic Equivalent Circuit 56
2.5 Translation of Magnetic Circuits to Electric Circuits: Flux Linkage and Inductance 59
2.6 Representing Fringing Flux in Magnetic Circuits 64
2.7 Representing Leakage Flux in Magnetic Circuits 68
2.8 Numerical Solution of Nonlinear Magnetic Circuits 80
2.9 Permanent Magnet Materials and Their Magnetic Circuit Representation 95
2.10 Closing Remarks 98
References 98
Problems 99
3 Introduction to Inductor Design 103
3.1 Common Inductor Architectures 103
3.2 DC Coil Resistance 105
3.3 DC Inductor Design 108
3.4 Case Study 113
3.5 Closing Remarks 119
References 120
Problems 120
4 Force and Torque 123
4.1 Energy Storage in Electromechanical Devices 123
4.2 Calculation of Field Energy 125
4.3 Force from Field Energy 127
4.4 Co-Energy 128
4.5 Force from Co-Energy 132
4.6 Conditions for Conservative Fields 133
4.7 Magnetically Linear Systems 134
4.8 Torque 135
4.9 Calculating Force Using Magnetic Equivalent Circuits 135
References 139
Problems 139
5 Introduction to Electromagnet Design 141
5.1 Common Electromagnet Architectures 141
5.2 Magnetic, Electric, and Force Analysis of an Ei-Core Electromagnet 141
5.3 EI-Core Electromagnet Design 151
5.4 Case Study 155
References 162
Problems 163
6 Magnetic Core Loss and Material Characterization 165
6.1 Eddy Current Losses 165
6.2 Hysteresis Loss and the B-H Loop 172
6.3 Empirical Modeling of Core Loss 177
6.4 Magnetic Material Characterization 183
6.5 Measuring Anhysteretic Behavior 188
6.6 Characterizing Behavioral Loss Models 197
6.7 Time-Domain Loss Modeling: the Preisach Model 201
6.8 Time-Domain Loss Modeling: the Extended Jiles-Atherton Model 205
References 211
Problems 212
7 Transformer Design 215
7.1 Common Transformer Architectures 215
7.2 T-Equivalent Circuit Model 217
7.3 Steady-State Analysis 221
7.4 Transformer Performance Considerations 223
7.5 Core-Type Transformer Configuration 231
7.6 Core-Type Transformer MEC 238
7.7 Core Loss 244
7.8 Core-Type Transformer Design 245
7.9 Case Study 251
7.10 Closing Remarks 259
References 260
Problems 260
