Permanent Magnet and Electromechanical Devices: Materials, Analysis, and Applications
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Table of contents
- Copyright Pageiv
- Contentsvii
- Forewordxi
- Prefacexiii
- Chapter 1. Materials1
- 1.1 Introduction1
- 1.2 Units2
- 1.3 Classification of Materials6
- 1.4 Atomic Magnetic Moments7
- 1.5 Paramagnetism17
- 1.6 Ferromagnetism19
- 1.7 Magnetostatic Energy23
- 1.8 Demagnetization Field23
- 1.9 Anisotropy27
- 1.10 Domains33
- 1.11 Hysteresis36
- 1.12 Soft Magnetic Materials39
- 1.13 Hard Magnetic Materials44
- 1.14 Ferrites46
- 1.15 Alnico48
- 1.16 Samarium-Cobalt50
- 1.17 Neodymium-Iron-Boron51
- 1.18 Bonded Magnets53
- 1.19 Magnetization55
- 1.20 Stability66
- Chapter 2. Review of Maxwell’s Equations73
- 2.1 Introduction73
- 2.2 Maxwell’s Equations74
- 2.3 Potentials82
- 2.4 Quasi-static Theory85
- 2.5 Static Theory87
- 2.6 Summary91
- Chapter 3. Field Analysis97
- 3.1 Introduction97
- 3.2 Magnetostatic Analysis97
- 3.3 The Current Model126
- 3.4 The Charge Model131
- 3.5 Magnetic Circuit Analysis144
- 3.6 Boundary-Value Problems161
- 3.7 Method of Images185
- 3.8 Finite Element Analysis190
- 3.9 Finite Difference Method200
- Chapter 4. Permanent Magnet Applications207
- 4.1 Introduction207
- 4.2 Magnet Structures208
- 4.3 High Field Structures265
- 4.4 Magnetic Latching268
- 4.5 Magnetic Suspension273
- 4.6 Magnetic Gears282
- 4.7 Magnetic Couplings286
- 4.8 Magnetic Resonance Imaging306
- 4.9 Electrophotography312
- 4.10 Magneto-Optical Recording318
- 4.11 Free-Electron Lasers325
- Chapter 5. Electromechanical Devices335
- 5.1 Introduction335
- 5.2 Device Basics335
- 5.3 Quasi-static Field Theory337
- 5.4 Electrical Equations354
- 5.5 Mechanical Equations361
- 5.6 Electromechanical Equations363
- 5.7 Energy Analysis376
- 5.8 Magnetic Circuit Actuators383
- 5.9 Axial-Field Actuators393
- 5.10 Resonant Actuators402
- 5.11 Magneto-Optical Bias Field Actuator406
- 5.12 Linear Actuators413
- 5.13 Axial-Field Motors421
- 5.14 Stepper Motors437
- 5.15 Hybrid Analytical-FEM Analysis446
- 5.16 Magnetic MEMS455
- Appendix A. Vector Analysis469
- A.1 Cartesian Coordinates469
- A.2 Cylindrical Coordinates473
- A.3 Spherical Coordinates476
- A.4 Integrals of Vector Functions479
- A.5 Theorems and Identities485
- A.6 Coordinate Transformations491
- Appendix B. Green’s Functions495
- Appendix C. Systems of Equations497
- C.1 Euler’s Method498
- C.2 Improved Euler Method502
- C.3 Runge-Kutta Methods503
- Appendix D. Units509
- Index513
The book provides both the theoretical and the applied background needed to predict magnetic fields. The theoretical presentation is reinforced with over 60 solved examples of practical engineering applications such as the design of magnetic components like solenoids, which are electromagnetic coils that are moved by electric currents and activate other devices such as circuit breakers. Other design applications would be for permanent magnet structures such as bearings and couplings, which are hardware mechanisms used to fashion a temporary connection between two wires.
This book is written for use as a text or reference by researchers, engineers, professors, and students engaged in the research, development, study, and manufacture of permanent magnets and electromechanical devices. It can serve as a primary or supplemental text for upper level courses in electrical engineering on electromagnetic theory, electronic and magnetic materials, and electromagnetic engineering.
This book is written for use as a text or reference by researchers, engineers, professors, and students engaged in the research, development, study, and manufacture of permanent magnets and electromechanical devices. It can serve as a primary or supplemental text for upper level courses in electrical engineering on electromagnetic theory, electronic and magnetic materials, and electromagnetic engineering.