12.11.4 Defining magnetic permeability

For a time-harmonic eddy current analysis, you must define the material's magnetic permeability. You can specify magnetic permeability that is isotropic, orthotropic, or fully anisotropic. See the following sections for more information:

To define magnetic permeability:

  1. From the menu bar in the Edit Material dialog box, select Electrical/MagneticMagnetic Permeability.

    (For information on displaying the Edit Material dialog box, see Creating or editing a material, Section 12.7.1.)

  2. Click the arrow to the right of the Type field, and specify the directional dependence of the magnetic permeability.

  3. Toggle on Use frequency-dependent data to define magnetic permeability that varies with frequency.

    A column labeled Frequency appears in the Data table.

  4. Toggle on Use temperature-dependent data to define magnetic permeability as a function of temperature.

    A column labeled Temp appears in the Data table.

  5. Click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables on which magnetic permeability depends.

  6. Enter the applicable data in the Data table:

    Magnetic Permeability

    Isotropic magnetic permeability. (Units of FA–2.)

    mu11(E), mu22(E), and mu33(E)

    Three values for orthotropic magnetic permeability, , , and . (Units of FA–2.)

    mu11(E), mu12(E), mu22(E), mu13(E), mu23(E), and mu33(E)

    Six values for anisotropic magnetic permeability, , , , , , and . (Units of FA–2.)

    Frequency

    Frequency in cycles/time.

    Temp

    Temperature.

    Field n

    Predefined field variables.

    You may need to expand the dialog box to see all the columns in the Data table. For detailed information on how to enter data, see Entering tabular data, Section 3.2.7.

  7. Click OK to close the Edit Material dialog box. Alternatively, you can select another material behavior to define from the menus in the Edit Material dialog box (see Browsing and modifying material behaviors, Section 12.7.2, for more information).