QuickField analysis for Superconductors

Webinar recorded on July 14, 2010.

QuickField may be effectively used for designing of various magnetic systems. During this free webinar Dr. Claycomb will discuss modeling the Meissner effect resulting in the expulsion of magnetic flux from superconductors with different geometries.

Zero-field-cooled and field-cooled boundary conditions will be demonstrated along with the calculation of superconducting surface current density and inductance. Applications discussed include magnetic levitation, magnetic shielding, coupled stress and magnetostatic analysis applied to superconductors, Type I and Type II superconductors, and superconducting flux focusers.

• Watch recorded webinar parts:
  
  Introduction
  
  1. Superconducting disc
  
  2. Superconducting rings x-y
  
  3. Superconducting rings (top view)
  
  4. Superconducting sphere
  
  5. Superconductor BH curve
  
  6. Superconducting ring levitation
  
  7. Superconductor mechanical stress
  
  8. Layered superconducting and permeable shields
  
• Watch on YouTube:
  Part 1. Contents. Basic Overview of Superconductivity. The Meissner Effect. The superconductor exhibits perfect diamagnetism. QuickField modules to simulate superconductors: magnetostatics, AC magnetics, transient magnetics. Specifying superconducting regions. Cooling in zero magnetic field or in finite magnetic field. Looking at the problem in QuickField, boundary conditions. Relative permeability. Flux lines, magnitude of flux density. Individual values of the field.
  Part 2. Changing edges conditions. Mechanical torque working on the superconductor disc. Parametric, serial analysis with LabelMover. Setting parameters for rotating. Deviation of the field.
  Part 3. Ring superconductor in x-y symmetry. Field-cooled boundary condition vs. zero-field-cooled boundary condition. Looking at the problem in QuickField. Flux density color maps.
  Part 4. Superconducting rings. The model. Analysis of magnetic field pictures. Flux density tables.
  Part 5. Calculating total flux to the ring, screening current, inductance. Creating contour around the ring.
  Part 6. Superconducting sphere in an external magnetic field. Physical values. Different boundary conditions. Results: deviation of the field, diagrams of current density. Changing the model (meshing).
  Part 7. How to construct a superconductor magnet. The model, a toroidal ring. Properties. Field picture and plots. Turning off the external magnetic field. Electric potential field plot. Total flux is constant - we have a superconductor magnet.
  Part 8. Type I and type II superconductivity. Magnetization curves. Non-linear B-H characteristics. Reference for superconductor magnets. The problem in QuickField. Flux distribution.
  Part 9. Modeling field penetration in superconductors. Illustrating superconductor levitation. Analyzing results. Mechanical force. Varying the position of the magnet. Work in LabelMover.
  Part 10. Work in LabelMover. Setting values. Simulation results. Distance for levitation. Stress distribution. Coupled problem on the same geometry model: magnetostatics - stress analysis. Displacement. Discussion of superconducting and permeable shields.
• Read presentation (in PDF format).
• Download simulation examples:
  Superconducting ring
  Superconducting sphere