Magnetic Actuators and Sensors
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Magnetic Actuators and Sensors

Magnetic Actuators and Sensors


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About the Book

Table of Contents:
Preface. PART I MAGNETICS. 1. Introduction. 1.1 Overview of Magnetic Actuators. 1.2 Overview of Magnetic Sensors. 1.3 Actuators and Sensors in Motion Control Systems. References. 2. Basic Electromagnetics. 2.1 Vectors. 2.1.1 Gradient. 2.1.2 Divergence. 2.1.3 Curl. 2.2 Ampere’s Law. 2.3 Magnetic Materials. 2.4 Faraday’s Law. 2.5 Potentials. 2.6 Maxwell’s Equations. Problems. References. 3. Reluctance Method. 3.1 Simplifying Ampere’s Law. 3.2 Applications. 3.3 Fringing Flux. 3.4 Complex Reluctance. 3.5 Limitations. Problems. References. 4. Finite-Element Method. 4.1 Energy Conservation and Functional Minimization. 4.2 Triangular Elements for Magnetostatics. 4.3 Matrix Equation. 4.4 Finite-Element Models. Problems. References. 5. Magnetic Force. 5.1 Magnetic Flux Line Plots. 5.2 Magnetic Energy. 5.3 Magnetic Force on Steel. 5.4 Magnetic Pressure on Steel. 5.5 Lorentz Force. 5.6 Permanent Magnets. 5.7 Magnetic Torque. Problems. References. 6. Other Magnetic Performance Parameters. 6.1 Magnetic Flux and Flux Linkage. 6.1.1 Definition and Evaluation. 6.1.2 Relation to Force and Other Parameters. 6.2 Inductance. 6.2.1 Definition and Evaluation. 6.2.2 Relation to Force and Other Parameters. 6.3 Capacitance. 6.3.1 Definition. 6.3.2 Relation to Energy and Force. 6.4 Impedance. Problems. References. PART II ACTUATORS. 7. Magnetic Actuators Operated by Direct Current. 7.1 Solenoid Actuators. 7.1.1 Clapper Armature. 7.1.2 Plunger Armature. 7.2 Voice Coil Actuators. 7.3 Other Actuators Using Coils and Permanent Magnets. 7.4 Proportional Actuators. 7.5 Rotary Actuators. Problems. References. 8. Magnetic Actuators Operated by Alternating Current. 8.1 Skin Depth. 8.2 Power Losses in Steel. 8.2.1 Laminated Steel. 8.2.2 Equivalent Circuit. 8.2.3 Solid Steel. 8.3 Force Pulsations. 8.3.1 Force with Single AC Coil. 8.3.2 Force with Added Shading Coil. 8.4 Cuts In Steel. 8.4.1 Special Finite-Element Formulation. 8.4.2 Loss and Reluctance Computations. Problems. References. 9. Magnetic Actuator Transient Operation. 9.1 Basic Timeline. 9.2 Size, Force, and Acceleration. 9.3 Linear Magnetic Diffusion Times. 9.3.1 Steel Slab Turnon and Turnoff. 9.3.2 Steel Cylinder. 9.4 Nonlinear Magnetic Diffusion Time. 9.4.1 Simple Equation for Steel Slab with “Step” B–H. 9.4.2 Transient Finite-Element Computations for Steel Slabs. 9.4.3 Simple Equation for Steel Cylinder with “Step” B–H. 9.4.4 Transient Finite-Element Computations for Steel Cylinders. Problems. References. PART III SENSORS. 10. Hall Effect and Magnetoresistive Sensors. 10.1 Simple Hall Voltage Equation. 10.2 Hall Effect Conductivity Tensor. 10.3 Finite-Element Computation of Hall Fields. 10.3.1 Unsymmetric Matrix Equation. 10.3.2 2D Results. 10.3.3 3D Results. 10.4 Toothed Wheel Hall Sensors for Position. 10.5 Magnetoresistance. 10.5.1 Classical Magnetoresistance. 10.5.2 Giant Magnetoresistance. 10.5.3 Newest Forms of Magnetoresistance. 10.6 Magnetoresistive Heads for Hard-Disk Drives. Problems. References. 11. Other Magnetic Sensors. 11.1 Speed Sensors Based on Faraday’s Law. 11.2 Inductive Recording Heads. 11.3 Proximity Sensors Using Impedance. 11.3.1 Stationary Eddy Current Sensors. 11.3.2 Moving Eddy Current Sensors. 11.4 Linear Variable Differential Transformers. 11.5 Magnetostrictive Sensors. 11.6 Flux Gate Sensors. 11.7 Magnetometers and Motes. Problems. References. PART IV SYSTEMS. 12. Coil Design and Temperature Calculations. 12.1 Wire Size Determination for DC Currents. 12.2 Coil Time Constant and Impedance. 12.3 Skin Effects and Proximity Effects for AC Currents. 12.4 Finite-Element Computations of Temperatures. 12.4.1 Thermal Conduction. 12.4.2 Thermal Convection and Thermal Radiation. 12.4.3 AC Magnetic Device Cooled by Conduction, Convection, and Radiation. Problems. References. 13. Electromagnetic Compatibility. 13.1 Signal-to-Noise Ratio. 13.2 Shields and Apertures. 13.3 Test Chambers. 13.3.1 TEM Transmission Lines. 13.3.2 TEM Cells. 13.3.3 Triplate Cells. Problems. References. 14. Electromechanical Finite Elements. 14.1 Electromagnetic Finite-Element Matrix Equation. 14.2 0D and 1D Finite Elements for Coupling Electric Circuits. 14.3 Structural Finite-Element Matrix Equation. 14.4 Force and Motion Computation by Timestepping. 14.5 Typical Electromechanical Applications. 14.5.1 DC Solenoid with Slowly Rising Input Current. 14.5.2 DC Solenoid with Step Input Voltage. 14.5.3 AC Clapper Solenoid Motion and Stress. 14.5.4 Transformers with Switches or Sensors. Problems. References. 15. Electromechanical Analysis Using Systems Models. 15.1 Electric Circuit Models of Magnetic Devices. 15.1.1 Electric Circuit Software Including SPICE. 15.1.2 Simple LR Circuits. 15.1.3 Tables of Nonlinear Flux Linkage and Force. 15.1.4 Analogies for Rigid Armature Motion. 15.1.5 Maxwell SPICE Model of Bessho Actuator. 15.1.6 Simplorer Model of Bessho Actuator. 15.2 VHDL-AMS/Simplorer Models. 15.2.1 VHDL-AMS Standard IEEE Language. 15.2.2 Model of Solenoid Actuator. 15.3 MATLAB/Simulink Models. 15.3.1 Software. 15.3.2 MATLAB Model of Voice Coil Actuator. 15.4 Including Eddy Current Diffusion Using a Resistor. 15.4.1 Resistor for Planar Devices. 15.4.2 Resistor for Axisymmetric Devices. Problems. References. 16. Coupled Electrohydraulic Analysis Using Systems Models. 16.1 Comparing Hydraulics and Magnetics. 16.2 Hydraulic Basics and Electrical Analogies. 16.3 Modeling Hydraulic Circuits in SPICE. 16.4 Electrohydraulic Models in SPICE and Simplorer. 16.5 Hydraulic Valves and Cylinders in Systems Models. 16.5.1 Valves and Cylinders. 16.5.2 Use in SPICE Systems Models. 16.6 Magnetic Diffusion Resistor in Electrohydraulic Models. Problems. References. Appendix: Symbols, Dimensions, and Units. Index.

Review :
"…well suited for magnetic actuator designers or those who use the types of magnetic sensors described in the book. It also would make an excellent text…" (IEEE Electrical Insulation Magazine, November/December 2006) "...an excellent treatise on magnetic fields and their technological application...highly recommend." (CHOICE, September 2006) "...the author has laid an excellent groundwork by focusing mainly on the fundamental equations needed to solve these problems through the use of practical examples, many taken from industry. These really help to convey a good understanding to the reader. I esxpecially liked the detailed calculations and the numerous sketches and photos that help to explain how equations were obtained." (IEEE Electrical Insulation Magazine, December 2006) "…well suited for magnetic actuator designers or those who use the types of magnetic sensors described in the book. It also would make an excellent text…" (IEEE Electrical Insulation Magazine, November/December 2006) "...an excellent treatise on magnetic fields and their technological application...highly recommend." (CHOICE, September 2006) "...the author has laid an excellent groundwork by focusing mainly on the fundamental equations needed to solve these problems through the use of practical examples, many taken from industry. These really help to convey a good understanding to the reader. I esxpecially liked the detailed calculations and the numerous sketches and photos that help to explain how equations were obtained." (IEEE Electrical Insulation Magazine, December 2006) "…well suited for magnetic actuator designers or those who use the types of magnetic sensors described in the book. It also would make an excellent text…" (IEEE Electrical Insulation Magazine, November/December 2006) "...an excellent treatise on magnetic fields and their technological application...highly recommend." (CHOICE, September 2006) "...the author has laid an excellent groundwork by focusing mainly on the fundamental equations needed to solve these problems through the use of practical examples, many taken from industry. These really help to convey a good understanding to the reader. I esxpecially liked the detailed calculations and the numerous sketches and photos that help to explain how equations were obtained." (IEEE Electrical Insulation Magazine, December 2006) "…well suited for magnetic actuator designers or those who use the types of magnetic sensors described in the book. It also would make an excellent text…" (IEEE Electrical Insulation Magazine, November/December 2006) "...an excellent treatise on magnetic fields and their technological application...highly recommend." (CHOICE, September 2006) "...the author has laid an excellent groundwork by focusing mainly on the fundamental equations needed to solve these problems through the use of practical examples, many taken from industry. These really help to convey a good understanding to the reader. I esxpecially liked the detailed calculations and the numerous sketches and photos that help to explain how equations were obtained." (IEEE Electrical Insulation Magazine, December 2006)


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Product Details
  • ISBN-13: 9780471777700
  • Publisher: John Wiley & Sons Inc
  • Publisher Imprint: Wiley-IEEE Press
  • Language: English
  • ISBN-10: 0471777706
  • Publisher Date: 10 Mar 2006
  • Binding: Digital (delivered electronically)
  • No of Pages: 400


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