Permanent Magnet and Electromechanical Devices

Permanent Magnet and Electromechanical Devices

Materials, Analysis, and Applications

1st Edition - August 29, 2001

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  • Author: Edward Furlani
  • eBook ISBN: 9780080513690
  • Hardcover ISBN: 9780122699511

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Description

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.

Readership

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.

Table of Contents

  • 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

Product details

  • No. of pages: 518
  • Language: English
  • Copyright: © Academic Press 2001
  • Published: August 29, 2001
  • Imprint: Academic Press
  • eBook ISBN: 9780080513690
  • Hardcover ISBN: 9780122699511

About the Author

Edward Furlani

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.

Affiliations and Expertise

Research Associate, Eastman Kodak Company, Rochester, New York, U.S.A.

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