CAE Software【Femtet】Murata Software Co., Ltd.
Example8 Inductance of Helical Coil
General
-
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.
Analysis Space
|
Item |
Settings |
|
Analysis Space |
3D |
|
Model unit |
mm |
Analysis Conditions
|
Item |
Settings |
|
Solvers |
Magnetic Field 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] |
Model
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 [Exercise 10: Inductance of Helical Coil (The Number of Turns Specified] for more details.
Body Attributes and Materials
|
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. |
Boundary Conditions
No setting.
Results
To see the results of inductance calculation, go to the [Results] tab
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.