Figure 1-1. EMS Maglev vehicle
Figure 1-2. EDS Maglev vehicle
Figure 1-3. Flux-canceling Maglev topology
Figure 1-4. Flux-canceling Maglev test fixture
Figure 3-1. Test wheel geometry
Figure 3-2. Prototype single guideway layer
Figure 3-3. Detail of guideway conductors
Figure 3-4. Geometry for determining wheel deflection under magnetic load
Figure 3-5. Tensile and shear stress in rotating fiberglass disk at 1000 RPM
Figure 3-6. Wheel lamination model for determining minimum fiberglass thickness
Figure 3-7. Model for determining torsional resonance
Figure 3-8. Circular plate geometry for calculation of flexural resonant modes
Figure 3-9. Assembled prototype guideway
Figure 3-10. Assembly of guideway conductors
Figure 3-11. Test wheel construction
Figure 3-12. Completed test wheel
Figure 3-13. Schematic view of air bearing system
Figure 3-14. Air bearing assembly
Figure 3-15. Air bearing test data
Figure 3-16. Cryostat design
Figure 3-17. Liquid nitrogen delivery system
Figure 4-1. Linearized magnet detail, with copper coils
Figure 4-2. Iron-core magnet, mounted to multi-axis force sensor, showing capacitive position sensors
Figure 4-3. Magnet wiring for flux-canceling Maglev
Figure 4-4. Results of finite element analysis, NI = 2200 Ampere-turns per coil
Figure 4-5. Degradation of Ic as a function of applied field orientation for HTSC tape
Figure 4-6. Tests of prototype HTSC coil, 77K, zero field
Figure 4-7. High-temperature superconducting magnet design
Figure 4-8. Predicted AC loss in prototype HTSC coil
Figure 4-9. Measured terminal impedance measured at differential driving terminals
Figure 5-1. Ideal EDS Maglev lift and drag forces, and lift-to-drag ratio
Figure 5-2. Model of single isolated guideway loop
Figure 5-3. Circular coil with rectangular cross section
Figure 5-4. Coil model
Figure 5-5. Guideway geometry
Figure 5-6. Comparison of calculated (solid line) to measured guideway coil-coil mutual inductance
Figure 5-7. Mode shapes associated with two lowest natural frequencies for guideway model
Figure 5-8. Pole plot of vertical dynamics of flux-canceling EDS
Figure 5-9. Control system block diagram
Figure 6-1. Measured test wheel runout
Figure 6-2. Accelerometer mounting locations
Figure 6-3. Magnetic lift measurement, showing
approximately -50
Figure 6-4. Lift, drag, and guidance force measurements at different vertical (z) displacements
Figure 6-7. Predictions of electrodynamic model
Figure 6-8. Model for development of scaling laws for EDS Maglev
Figure 6-9. Variation in HTSC critical current for various designs
Figure 6-10. AC lift measurements at 10, 20, 50 and 100 Hz
Figure 6-11. Differential lift measurement
Figure 6-12. System driven with sinusoidal current at differential drive terminals
Figure 6-13. Performance of active secondary suspension
Figure 6-14. Limit cycle
Figure 7-1. "2 Sided" EDS Maglev suspension
Figure 7-2. Use of ferrite in guideway slots to reduce eddy current losses
Figure 8-1. Current source schematics
Figure 8-2. Control current source, small signal current response
Figure 8-3. Accelerometer module
Figure 8-4. Magnet vertical position control system
Figure 8-5. Liquid nitrogen delivery system
Figure 8-6. Experimental method for determining mutual inductance coupling coefficients
Marc T. Thompson, Ph.D.
Thompson Consulting, Inc.
Phone: (978) 456-7722
Email: marctt@thompsonrd.com
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Page created: October 6, 1998. Last modified:
October 6, 1998
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