Material Parameters: default - Nonlinear
Materials New/EditNew MaterialNonlinear
Edit Object Properties (:
Materials:material1PropertiesNonlinear)
This is a dialog page of the Material
Parameters dialog box.
This dialog offers the possibility to define a nonlinear
permeability as magnetic H-B curve and lamination settings for a nonlinear
material with stacking factor.
Magnetic B-H curve
Value: In this list box a nonlinear magnetic H-B curve
can be defined. Successive H values have to be strict monotonous increasing
and the H-B curve has to be monotonous increasing.
Measurement error:
This is the maximum error of the given data points meaning that maximum
distance of the computed material curve from the data points is less than
the measurement error.
Insert: Inserts
a new row as mean values
between the selected row and the row before.
Delete Value: Pressing
this button deletes the selected row in the magnetic
H-B curve list box.
Delete All: Pressing this button deletes all entries in
the magnetic H-B curve list
box.
Import: Imports
a H-B curve from a text file with the corresponding H-B pairs in a two
column list. Note:
All entries in the
list will be deleted before the import.
Export: Exports
the H-B curve as a text file.
Stacking
Stacked material:
Switch it on to define a nonlinear material with stacking factor.
Stacking factor: Enter
here the fraction of the layers in the stacked material. The fraction
of each layer is the ratio of the thickness
of the nonlinear part to the thickness of the
entire layer including
the insulation. The stacking factor must be a value between 0 and 1. The
value 1 corresponds to isotropic material.
Stacking
direction: Specify here the direction which is perpendicular to
the layers (lamination) of the stacked material. Depending on the chosen
coordinate system, the direction is interpreted either in global coordinates
or in the coordinates of the local
solid coordinate system (provided there is one).
Coord.
system: Choose whether to interpret the stacking
direction in Global coordinates
or Relative to each solid
of this material, i.e. in local
solid coordinates. When solid related coordinates are chosen, it is
required that each solid with this material has a local solid coordinate
system. Otherwise a warning will be printed in the material (or appropriate
solid) preview and the stacking direction will be interpreted in global
coordinates. The advantage of choosing local solid coordinates is that
only one material has to be defined for solids with different orientations.
Please
note: The nonlinear stacking feature is currently supported only
by the tetrahedral magnetostatic solver.
Prev. Stacking / Prev. B-H curve
Behind
the dialog either the B-H curve or the model structure can be previewed.
With this button you can switch between the two states.
When
the structure preview is active, pink arrows are drawn at each solid center
which point in the direction specified as Stacking
direction (depending on the chosen coordinate system). Moreover
the letter "X" at the pointed side of an arrow indicates that
the direction is meant to be relative to the solid coordinate system,
but no solid coordinate systems exists for this solid.
See also
Material
Parameters, Material
Overview,
Change
Material, Modeler
View, Add
to Material Library
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