Permanent Magnet and Electromechanical Devices

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.

• 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