Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 23: Toroidal Coil

The magnetic field generated by a toroidal coil is analyzed.
The vectors of the magnetic field and the magnetic flux density are solved.
Unless specified in the list below, the default conditions will be applied.
The coil is created from [Macro Sample] #3 that is on Murata Software’s website.
Item |
Settings |
Analysis Space |
3D |
Model Unit |
mm |
Item |
Settings |
Solver |
Magnetic Analysis [Gauss] |
Analysis Type |
Static Analysis |
Options |
N/A |
Set the Mesh Tab as follows.
Tab |
Setting Item |
Settings |
Mesh |
Meshing Setup |
Automatically set the general mesh size: Deselect General Mesh Size: 1 [mm] |
Coil (Cur) is wound on the ferrite core (Ferrite).

The coil's form is given by the following equations.
x = ( A*sin(t*N) + B ) * cos(t)
y = ( A*sin(t*N) + B ) * sin(t)
z = A*cos(t*N)
A: Radius of the coil
B: Radius of the torus (Intermediate value between the outer and inner radiuses)
N: Number of turns of coil
t: Angle
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
Ferrite |
Ferrite |
5/Solid |
Cur |
008_Cu |
* Available from the material DB
Material Name |
Tab |
Settings |
Ferrite |
Permeability |
Relative Permeability: 1x103 |
No setting.
To see the calculation results of electromagnetic force and inductance, go to the [Results] tab

and click [Table]
.

The vectors of the magnetic flux density are shown below.

The vectors of the magnetic field are shown below.
