.FluxTubesExtension.Material.SimpleSoftMagnetic

Information

The magnetisation characteristics B(H) of all soft magnetic materials currently included in this library are approximated with a function. Each material is characterised by the parameters of this function. The approximated characteristics B(H) for most of the ferromagnetic materials currently included are shown in the plots below (solid lines) together with the original data points compiled from measurements and literature.

The following materials (E-Sheet I, E-Sheet IV, Cast Steel, Rolled Steel, Cast Iron) are used for education at OTH Regensburg, Faculty of Electrical Engineering and Information Technology.

The following materials (electro-sheet hot rolled and cold rolled) were used for eductaion at the Technical University Vienna, Institute of Energy Systems and Electrical Drives.

Note that the magnetisation characteristics largely depend on possible previous machining and on measurement conditions. A virgin material normally has a considerably higher permeability than the same material after machining (and packet assembling in case of electric sheets).

Additional user-specific materials can be defined as needed. This requires determination of the approximation parameters from the original data points, preferably with a nonlinear curve fit.

Contents

Name	Description
BaseData	Replace: Coefficients for approximation of soft magnetic materials acc. to Macfadyen
BH_Approx	Approximation of B(H) for simple soft magnetic materials
derBH_Approx	Approximation of der(B(H)) for simple soft magnetic materials
mu_rApprox	Approximation of mu_r(H) for simple soft magnetic materials
mu_rdApprox	Approximation of mu_rd(H) for simple soft magnetic materials
ESheetI	E-Sheet I
ESheetIV	E-Sheet IV
CastSteel	Cast Steel
RolledSteel	Rolled Steel
CastIron	Cast Iron
HotRolled	Hot rolled
ColdRolled	Cold rolled