General
Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 8: Inductance of Helical Coil
The inductance of a helical coil is solved.
The vectors of the magnetic field and the magnetic flux density are also solved.
Unless specified in the list below, the default conditions will be applied.
Results will vary depending on Femtet version and the PC environment.
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: 2 [mm] |
A helical solid body Coil (coil) is defined.
Instead of creating the helical shape, a model with specified number of turns (bulk coil) will be effective for the coil with high number of turns (100s, 1000s)
See [Example 10: Inductance of Helical Coil (The Number of Turns Specified)] for more details.
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
Coil |
008_Cu * |
* Available from the material DB
Body attribute is set up as follows to apply current to the coil.
Body Attribute Name |
Tab |
Settings |
Coil |
Current |
Waveform: Constant Current: 1 [A] Turns: 1 [Turns] Direction: Specify Inflow/Outflow faces (In the Air Box): Select inflow face and outflow face. |
No setting.
To see the results of inductance calculation, go to the [Results] tab
and click [Table] 
.
The vectors of the magnetic flux density are shown below.
The vectors of the magnetic field on ZX plane are shown below.
The magnetic field inside coil is directing the Z- direction.
The vectors of the current density are shown below.
The current is flowing as set for the coil.