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Main > Application > Sample problems

Coil B: Coil with ferromagnetic core

DC current is applied to the electric coil with ferromagnetic core.

Problem Type:
Axisymmetric problem of DC magnetics.

Geometry:

CoilB model

All dimensions are in millimeters.

Given:
Relative permeability of the air and winding μ = 1;
Number of turns w = 400;
Applied current in wire I = 2 A;
B-H curve for the steel core:

B (T)

0.2

0.6

1.0

1.2

1.4

1.6

1.7

H (A/m)

70

150

300

450

920

3000

5000

Problem:
1. Obtain the magnetic field in coil and air.
2. Get chart Flux Density along the rotational axis of the coil

Solution:
Define a spherical region solution. Radius of R = 2000 mm.
In the block core values put the B-H. In the block coil enter the total coil current 800 A. For point 2. task draw a line from the center of cores to the right end of the axis z.

Results:
Magnetic field distribution:

magnetic field distribution in CoilB

Flux density in the core:

CoilB magnetic flux density

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