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Magn1: Nonlinear permanent magnet

A simulation of permanent magnet and a steel keeper in the air, performed with QuickField software.

Problem Type:
Plane problem of DC magnetics.

Geometry:

Nonlinear permanent magnet

All dimensions are in centimeters.

Given:
The permanent magnets are made of ALNICO, coercive force is 147218 A/m. The polarizations of the magnets are along vertical axis opposite to each other. The demagnetization curve for ALNICO:

H, A/m

-14728

-119400

-99470

-79580

-53710

-19890

0

B, T

0

0.24

0.4

0.5

0.6

0.71

0.77

The B-H curve for the steel:

H, A/m

400

600

800

1000

1400

2000

3000

4000

6000

B, T

0.73

0.92

1.05

1.15

1.28

1.42

1.52

1.58

1.60

Problem:
Find maximum flux density in Y-direction

Solution:
To avoid the influence of the boundaries while modelling the unbounded problem, we'll enclose the magnet in a rectangular region of air and specify zero Dirichlet boundary condition on its sides.

Results:
Flux density in nonlinear permanent magnet:

Flux density in nonlinear permanent magnet

Maximum flux density in Y-direction:
 

By, T

ANSYS

0.42

COSMOS/M

0.404

QuickField

0.417

Download PDF icon View simulation report in PDF.

Download icon Download simulation files (files may be viewed using any QuickField Edition).

There are no restrictions applied to the QuickField Student Edition postprocessors.
You can view field maps, make plots, calculate integrals and print pictures in the same way that the Professional Edition users do.