Permanent Magnet and Electromechanical Devices

Materials, Analysis, and Applications


  • Edward Furlani, Eastman Kodak Company, Rochester, New York, U.S.A.

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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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.


Book information

  • Published: August 2001
  • ISBN: 978-0-12-269951-1

Table of Contents

Preface1. Materials IntroductionUnitsClassification of Materials Atomic Magnetic MomentsSingle electron atomsMultielectron atomsParamagnetismFerromagnetismMagnetostatic Energy Demagnetization FieldAnisotropyMagnetocrystalline AnisotropyShape AnisotropyDomains HysteresisSoft Magnetic Materials Hard Magnetic MaterialsFerrites AlnicoSamarium-CobaltNeodymium-iron-boronBonded Magnets MagnetizationStability2. Review of Maxwell's Equations IntroductionMaxwell's EquationsConstitutive RelationsIntegral Equations Boundary Conditions Force and Torque Potentials Quasi-static TheoryStatic TheoryMagnetostatic TheoryElectrostatic Theory Summary3. Field Analysis IntroductionMagnetostatic AnalysisVector PotentialForce and TorqueMaxwell Stress TensorEnergyInductanceThe Current ModelThe Charge ModelForce TorqueMagnetic Circuit Analysis Current SourcesMagnet SourcesBoundary-Value Problems Cartesian Coordinates Cylindrical Coordinates Spherical CoordinatesMethod of ImagesFinite Element Analysis Finite Difference Method4. Permanent Magnet ApplicationsIntroductionMagnet Structures Rectangular StructuresCylindrical Structures High Field StructuresMagnetic Latching Magnetic Suspension Magnetic Gears Magnetic Couplings Magnetic Resonance ImagingElectrophotography Magneto-Optical Recording Free-Electron Lasers5. Electromechanical Devices IntroductionDevice BasicsQuasi-static Field TheoryStationary Reference Frame Moving Reference Frames Electrical EquationsStationary Circuits Moving CoilsMechanical EquationsElectromechanical EquationsStationary Circuits Moving Coils Energy Analysis Magnetic Circuit Actuators Axial-Field Actuators Resonant ActuatorsMagneto-Optical Bias Field ActuatorLinear Actuators Axial-Field Motors Stepper Motors Hybrid Analytical-FEM Analysis Magnetic MEMSVector Analysis Cartesian Coordinates Cylindrical CoordinatesSpherical Coordinates Integrals of Vector Functions Theorems and Identities Coordinate Transformations Green's Function Systems of Equations Euler's MethodImproved Euler Method Runge-Kutta Methods Units