The “Frozen permeability” in Flux is a specific feature that allows freezing the permeability from a first computation. The frozen permeability can be used in a second computation with different values of current, or without magnet for instance.
To activate the frozen permeability, you have to follow the procedure below:
| 1 | 1 Solve the first case |
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| 2 | Select Parameter/Quantity -> Export quantity-> Export spatial quantity and formula starting from different types of supports Here is an example how to fill in the fields: - Support for exportation: Face region
- Face region: Name of one region
- Export format: DEX Flux file format
- File Name : Name of the file *.DEX to be created
- Formula: MurIncr (click on f() to open the formula editor, select µr inc and click on OK)
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| 3 | Click on the OK button (normally a specific *.DEX file is created in the working directory) |
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| 4 | Close the current project |
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| 5 | Open the 2nd Flux project |
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| 6 | Select Parameter/Quantity -> Import parameter and quantity -> New (constant) tabulated spatial quantity by importation Here is an example how to fill in the fields: - Name of the tabulated…: FROZEN_MU_1
- Support for importation: Surface region
- Surface region: Name of one region
- File name: *.DEX
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| 7 | Click on the OK button |
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| 8 | Create a new magnetic material (select Physics->Material->New) - Fill in the field Name of the material
- Check the Magnetic property case
- Select Spatial linear isotropic (close to the end of the list)
- Select FROZEN_MU_1 in the Spatial relative permeability field
- Click on the OK button
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| 9 | Modify the property of one region in order to use this new material
Note: you have to repeat steps 8 and 9 for each region with frozen permeability |
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| 10 | Solve the 2nd project and analyze the results |
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