Demagnetization Coefficient Plots

Demagnetization Coefficient: Demag_coef[%] = Br1/Br0*100%

When Demag_Coef = 1, the magnet behaves without any demagnetization at that location;

When Demag_Coef = 0, the magnet is fully demagnetized at that location.

Demag_Coef Plot over the Geometry of Nonlinear Permanent Magnets:

Demag_Coef is a scalar value between 0 and 1, and is displayed as a color shaded plot inside nonlinear permanent magnets. Demag_Coef is applicable to 2D/3D transient solutions, and 2D/3D magnetostatic solutions - assign to objects by right-clicking them and selecting Fields > Other > Demag_Coef. Solvers provide the quantity at each node element-by-element to the post-processor for all nonlinear permanent magnetic objects at each timestep with the saved field.

Demag_Coef Curve as a Function of Time at Specific Locations:

This function is provided in terms of the expression cache at any specified point in the magnet. This plot is only applicable to 2D/3D transient solutions.

Demagnetization Percentage Statistics Curve as a Function of Time over All Magnet Volumes

For a specified Demag_Coef threshold, determine what the percentage of total volume for all magnets is, whose Demag_Coef is equal or greater than the specified Demag_Coef threshold. To determine this, the solver uses the Demag_Coef threshold values from 0.1 to 0.9, with 0.1 as the step interval, to compute the Demag Percentage statistics (VolumePercentageAbove10Percent through VolumePercentageAbove90Percent) at each timestep.

As a result, the output is a series of nine curves from 0.1 to 0.9 similar to the example shown below. This plot is only applicable to 2D/3D transient solutions.