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Coil B: Coil with ferromagnetic core

coil with ferromagnetic coil, solenoid with ferromagnetic coil, magnetic field simulation

Example by Ing. Jan Ruzicka

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

Problem Type:
Axisymmetric problem of DC magnetics.

Geometry:

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:

Flux density in the core:

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