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Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 26: Permeance
Example 26: Permeance
General
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The permeance of a magnet is calculated.
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Unless specified in the list below, the default conditions will be applied.
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Obtain this session's project file. (Right-click and choose 'Save link as')
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Results will vary depending on Femtet version and the PC environment.
Analysis Conditions
|
Item |
Settings |
|
Solver |
Magnetic Analysis [Gauss] |
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Analysis Space |
3D |
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Analysis Type |
Static analysis |
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Model Unit |
mm |
|
Options |
N/A |
Model
The permeance of a spherical magnet is calculated.
The magnetizing direction of the magnet is +Z by default.
Body Attributes and Materials
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Body Number/Type |
Body Attribute Name |
Material Name |
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1/Solid |
mag |
mag |
* Available from the material DB
The material properties are set up as follows:
|
Material Name |
Tab |
Properties |
|
mag |
Permeability |
Material Type: Permanent Magnet |
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Magnet |
Magnetization Strength: 1.0 |
Boundary Conditions
Open boundary is set for the outer boundary condition.
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Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Settings |
|
Outer Boundary Condition |
Electric |
Open Boundary |
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Results
Coefficient of permeance is given by
Pc = B/u0H
where B is the magnetic flux density [T], H is the magnetic field [A/m] and u0 is the permeability of vacuum, 4πx10-7.
Display of Coefficient of Permeance
Set the field type to [Coefficient of Permeance] to show a contour diagram.
