Permanent Magnet and Electromechanical Devices

Materials, Analysis, and Applications
Erscheinungsjahr 2001
ISBN: 978-0-12-269951-1
Verlag: William Andrew Publishing

Buch, Englisch, 518 Seiten, Format (B × H): 152 mm x 229 mm, Gewicht: 810 g

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.

Zielgruppe

Engineers, applied mathematicians, and physicists; Materials scientists - magnetic materials; Technicians engaged in the development, manufacturing or characterization of permanent magnet materials, permanent magnet devices, or electromechanical devices; electrical engineering students.

Autoren/Hrsg.

Furlani, Edward P.

Fachgebiete

• Naturwissenschaften Physik Elektromagnetismus Magnetismus
• Naturwissenschaften Physik Elektromagnetismus Elektrizität, Elektrodynamik
• Naturwissenschaften Physik Elektromagnetismus Halbleiter- und Supraleiterphysik

Inhaltsverzeichnis

Preface
1. Materials

Introduction
Units
Classification of Materials

Atomic Magnetic Moments
Single electron atoms
Multielectron atoms
Paramagnetism
Ferromagnetism
Magnetostatic Energy

Demagnetization Field
Anisotropy
Magnetocrystalline Anisotropy
Shape Anisotropy
Domains

Hysteresis
Soft Magnetic Materials

Hard Magnetic Materials
Ferrites

Alnico
Samarium-Cobalt
Neodymium-iron-boron
Bonded Magnets

Magnetization
Stability

2. Review of Maxwell's Equations

Introduction
Maxwell's Equations
Constitutive Relations
Integral Equations

Boundary Conditions

Force and Torque

Potentials

Quasi-static Theory
Static Theory
Magnetostatic Theory
Electrostatic Theory

Summary

3. Field Analysis

Introduction
Magnetostatic Analysis
Vector Potential
Force and Torque
Maxwell Stress Tensor
Energy
Inductance
The Current Model
The Charge Model
Force

Torque
Magnetic Circuit Analysis

Current Sources
Magnet Sources
Boundary-Value Problems

Cartesian Coordinates

Cylindrical Coordinates

Spherical Coordinates
Method of Images
Finite Element Analysis

Finite Difference Method

4. Permanent Magnet Applications
Introduction
Magnet Structures

Rectangular Structures
Cylindrical Structures

High Field Structures
Magnetic Latching

Magnetic Suspension

Magnetic Gears

Magnetic Couplings

Magnetic Resonance Imaging
Electrophotography

Magneto-Optical Recording

Free-Electron Lasers

5. Electromechanical Devices

Introduction
Device Basics
Quasi-static Field Theory
Stationary Reference Frame

Moving Reference Frames

Electrical Equations
Stationary Circuits

Moving Coils
Mechanical Equations
Electromechanical Equations
Stationary Circuits

Moving Coils

Energy Analysis

Magnetic Circuit Actuators

Axial-Field Actuators

Resonant Actuators
Magneto-Optical Bias Field Actuator
Linear Actuators

Axial-Field Motors

Stepper Motors

Hybrid Analytical-FEM Analysis

Magnetic MEMS

Vector Analysis

Cartesian Coordinates

Cylindrical Coordinates
Spherical Coordinates

Integrals of Vector Functions

Theorems and Identities

Coordinate Transformations

Green's Function

Systems of Equations

Euler's Method
Improved Euler Method

Runge-Kutta Methods

Units

Über Autor(innen)

Furlani, Edward P.
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.