Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 25: Force between Magnet and Electromagnet (Axisymmetric Analysis)

Example 25: Force between Magnet and Electromagnet (Axisymmetric Analysis)

General

• This example solves Example 7 with the axisymmetric analysis.
  The number of meshes is much less with axisymmetric models, so the simulation time is shorter.
   

• The electromagnetic force, the current density, and the vectors of magnetic field and the magnetic flux density are solved.
   

• Unless specified in the list below, the default conditions will be applied.
   




• Results will vary depending on Femtet version and the PC environment.

Analysis Space

Analysis Conditions

Model

A cylindrical magnet is placed on top of the iron core (Fe) of the electromagnet.

Mesh size is set at 1 [mm] as the magnetic field changes drastically between the magnets.

• Set the gap between the bodies and mesh size properly to obtain valid calculation results.
  See [Calculation of the Electromagnetic Force] for more details.

Body Attributes and Materials

* Available from the material DB

The material properties are set up as follows:

Body attribute is set up as follows to apply current to the loop coil.

Boundary Conditions

No setting.

Results

To see the electromagnetic force, go to the [Results] tab

 and click [Table] .

The two magnets are pulling each other with the approximate force of 1.2 [N] in the Z direction.

Shown below are the vectors of the current density flowing through the loop coil.

The vectors of the magnetic field are shown below.

The vectors of the magnetic flux density are shown below.