Permanent Magnet and Electromechanical Devices: Materials, Analysis, and Applications

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Academic Press, Sep 12, 2001 - Science - 518 pages
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.
 

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Contents

Materials
1
12 Units
2
13 Classification of Materials
6
14 Atomic Magnetic Moments
7
141 Single Electron Atoms
9
142 Multielectron Atoms
14
15 Paramagnetism
17
16 Ferromagnetism
19
37 Method of Images
185
38 Finite Element Analysis
190
39 Finite Difference Method
200
Permanent Magnet Applications
207
42 Magnet Structures
208
422 Cylindrical Structures
218
43 High Field Structures
265
44 Magnetic Latching
268

17 Magnetocrystalline Anisotropy
23
19 Anisotropy
27
192 Shape Anisotropy
31
110 Domains
33
111 Hysteresis
36
112 Soft Magnetic Materials
39
113 Hard Magnetic Materials
44
114 Ferrites
46
115 Alnico
48
116 SamariumCobalt
50
117 NeodymiumIronBoron
51
118 Bonded Magnets
53
119 Magnetization
55
120 Stability
66
Review of Maxwells Equations
73
22 Maxwells Equations
74
221 Constitutive Relations
75
222 Integral Equations
77
223 Boundary Conditions
79
224 Force and Torque
82
24 Quasistatic Theory
85
25 Static Theory
87
252 Electrostatic theory
89
26 Summary
91
Field Analysis
97
321 Vector Potential
102
322 Force and Torque
110
323 Maxwell Stress Tensor
112
324 Energy
116
325 Inductance
118
33 The Current Model
126
34 The Charge Model
131
341 Force
135
342 Torque
141
35 Magnetic Circuit Analysis
144
352 Magnet sources
153
36 BoundaryValue Problems
161
361 Cartesian Coordinates
162
362 Cylindrical Coordinates
175
363 Spherical Coordinates
180
45 Magnetic Suspension
273
46 Magnetic Gears
282
47 Magnetic Couplings
286
48 Magnetic Resonance Imaging
306
49 Electrophotography
312
410 Magnetooptical Recoriding
318
411 FreeElectron Lasers
325
Electromechanical Devices
335
53 QuasiStatic Field Theory
337
531 Stationary Reference Frames
338
532 Moving Reference Frames
341
54 Electrical Equations
354
542 Moving Coils
358
55 Mechanical Equations
361
56 Electromechanical Equations
363
562 Moving coils
366
57 Energy Analysis
376
58 Magnetic Circuit Actuators
383
59 AxialField Actuators
393
510 Resonant Actuators
402
511 Magnetooptical Bias Field
406
512 Linear Actuators
413
513 AxialField Motors
421
514 Stepper Motors
437
515 Hybrid AnalyticalFEM Analysis
446
516 MAGNETIC MEMS
455
Vector Analysis
469
A2 Cylindrical Coordinates
473
A3 Spherical Coordinates
476
A4 Integrals of Vector Functions
479
A5 Theorems and Identities
485
A6 Coordinate Transformations
491
Greens Functions
495
Systems of Equations
497
C1 Eulers Method
498
C2 Improved Euler Method
502
C3 RungeKutta Methods
503
Units
509
Index
513
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About the author (2001)

Dr. Edward Furlani holds BS degrees in both physics and electrical engineering, and MS and PhD degrees in theoretical physics from the State University of New York at Buffalo. He is currently a research associate in the research laboratories of the Eastman Kodak Company, which he joined in 1982. He has worked in the area of applied magnetics for over 15 years. His research in this area has involved the design and development of numerous magnetic devices and processes. He has extensive experience in the analysis and simulation of a broad range of magnetic applications including rare-earth permanent magnet structures, magnetic drives and suspensions, magnetic circuits, magnetic brush subsystems in the electrophotographic process, magnetic and magneto-optic recording, high-gradient magnetic separation, and electromechanical devices such as transducers, actuators and motors. His current research activity is in the area of microsystems and involves the analysis and simulation of various micro-electromechanical systems (MEMS) including light modulators, microactuators and microfluidic components. Dr. Furlani has authored over 40 publications in scientific journals and holds over 100 US patents.

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