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TEMagn1: Transient eddy currents in a semi-infinite solid
This is an example of the transient eddy currents simulation, performed with QuickField software.
Problem Type:
A plane problem of nonlinear transient magnetic analysis.
Geometry:
The surface of semi-infinite solid plate is suddenly subjected to a constant magnetic potential A0.
Given:
Magnetic permeability of material μ=1;
Conductivity of material g=2,500,000 S/m;
Loadig A0=2 Wb/m.
Problem:
Determine current distribution within the conductor.
Solution:
The model length 20 m is arbitrarily selected such that no significant potential change occurs at the end points for the time period of interest. The final time of 0.25 s is sufficient for the theoretical response comparison. A time step of 0.005 s is used.
Comparison of results
|
Time t = 0.15 s |
Coordinate x,m |
QuickField |
ANSYS |
Theory |
Vector Potential A, Wb/m |
0.2517 |
0.822 |
0.831 |
0.831 |
0.4547 |
0.280 |
0.278 |
0.282 |
0.6914 |
0.053 |
0.044 |
0.05 |
Flux Density B, T |
0.2517 |
3.692 |
3.687 |
3.707 |
0.4547 |
1.716 |
1.794 |
1.749 |
0.6914 |
0.418 |
0.454 |
0.422 |
Eddy Current Density j, A/mm2 |
0.2517 |
-8.06 |
-7.80 |
-7.77 |
0.4547 |
-6.56 |
-6.77 |
-6.63 |
0.6914 |
-2.34 |
-2.45 |
-2.43 |
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