This preview shows page 1. Sign up to view the full content.
Unformatted text preview: D97 elements. The length of the solenoid is assumed infinite (L = ∞ ), so only a section
of the axisymmetric solenoid (t = .002 m, arbitrary) is required for modeling. It is assumed that the magnetic field
external to the solenoid is zero, so the nodes at x = b are coupled (AZ = constant (2-D), AY = constant (3-D)) such
that the proper flux-parallel boundary condition is imposed. The flux-parallel condition at x = 0 is imposed by
setting A = 0. Flux-normal boundary conditions are imposed naturally (no ANSYS input necessary) at y = 0 and
y = t for the 2-D analysis, while in 3-D, the normal component (AZ) is set to zero. In 3-D, the nodes are rotated
into cylindrical coordinates so that all in-plane vector potentials (AX and AZ) can be set to zero since only AY is
required for a true axisymmetric field solution.
Symmetric structural boundary conditions are applied to the solenoid elements at y = 0. The nodes at y = t on
the solenoid are coupled in UY to ensure symmetry. The air is modele...
View Full Document
- Spring '09
- The Land