General
Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 32: Magnetic Field of Three-Phase AC
Three-phase AC current flows in three conductors.
The magnetic field vectors and the conductors' inductance and impedances 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.
Item |
Settings |
Analysis Space |
3D |
Model Unit |
mm |
Item |
Settings |
Solver |
Magnetic Analysis [Gauss] |
Analysis Type |
Harmonic Analysis |
Options |
N/A |
The frequency of the current is set to 10 [kHz].
Tab |
Setting Item |
Settings |
Mesh Tab |
Frequency-Dependent Meshing |
Reference Frequency: 10x103 [Hz] |
Harmonic analysis |
Sweep Type |
Single Frequency |
Frequency |
10×103 [Hz] |
Set the Mesh Tab as follows.
Tab |
Setting Item |
Settings |
Mesh Tab |
Meshing Setup |
Automatically set the general mesh size: Deselect General Mesh Size: 2 [mm] |
Conductors (Coil_u, Coil_v and Coil_w) are defined.
U, V, and W are phased at 0, -120, and +120 [deg] respectively.
Body Number/Type |
Body Attribute Name |
Material Name |
1/Solid |
Coil_u |
008_Cu * |
2/Solid |
Coil_v |
008_Cu * |
3/Solid |
Coil_w |
008_Cu * |
* Available from the material DB
Body attribute is set up as follows to apply currents to each of the three coils.
U, V, and W are phased at 0, -120, and +120 [deg] respectively.
Body Attribute Name |
Tab |
Settings |
Coil_u |
Current |
Waveform: AC Current: 1 [A] Phase: 0 [deg] Turns: 1 [Turns] Direction: Specify Inflow/Outflow faces Select Inflow face and Outflow face. |
Coil_v |
Current |
Waveform: AC Current: 1 [A] Phase: -120 [deg] Turns: 1 [Turns] Direction: Specify Inflow/Outflow faces Select Inflow face and Outflow face. |
Coil_w |
Current |
Waveform: AC Current: 1 [A] Phase: 120 [deg] Turns: 1 [Turns] Direction: Specify Inflow/Outflow faces Select Inflow face and Outflow face. |
No setting.
To see the results of inductance and impedance calculation, go to the [Results] tab
and click [Table] 
.
The inductance is as follows.
Shown below is the vectors of the magnetic field at Phase=0 [deg].
Shown below is the vectors of the magnetic field at Phase=120 [deg].
Shown below is the vectors of the magnetic field at Phase=240 [deg].
Shown below is the vectors of the current density at Phase=0 [deg].
