CAE Software【Femtet】Murata Software Co., Ltd.
Example32 Magnetic Field of Three-Phase AC
General
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AC current flows in 3 paired conductors.
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The magnetic field vectors and the conductors’ impedances are solved.
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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 |
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: 10×10^3[Hz] |
|
Harmonic analysis |
Sweep Type |
Single frequency |
|
Frequency |
10×10^3[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] |
Model
Conductors (Coil_u, Coil_v and Coil_w) are defined.
U, V, and W are phased at 0, -120, and +120 [deg] respectively.
Body Attributes and Materials
|
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. |
Boundary Conditions
No setting.
Results
To see the results of inductance and impedance calculation, go to the [Results] tab
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].
