WOLFRAM SYSTEM MODELER

mu_rApprox

Approximation of relative permeability mu_r as a function of flux density B for soft magnetic materials

Wolfram Language

In[1]:=
SystemModel["Modelica.Magnetic.FluxTubes.Material.SoftMagnetic.mu_rApprox"]
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Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

The relative permeability mu_r as a function of flux density B for all soft magnetic materials currently included in this library is approximated with the following function [Ro00]:

Equation for approximation mu_r(B)

Two of the five parameters of this equation have a physical meaning, namely the initial relative permeability mu_i at B=0 and the magnetic flux density at maximum permeability B_myMax. B_N is the flux density normalized to latter parameter.

Syntax

mu_r = mu_rApprox(B, mu_i, B_myMax, c_a, c_b, n)

Inputs (6)

B

Type: MagneticFluxDensity (T)

Description: Flux density in ferromagnetic flux tube element
mu_i

Type: RelativePermeability

Description: Initial relative permeability at B=0
B_myMax

Type: MagneticFluxDensity (T)

Description: Flux density at maximum relative permeability
c_a

Type: Real

Description: Coefficient of approximation function
c_b

Type: Real

Description: Coefficient of approximation function
n

Type: Real

Description: Exponent of approximation function

Outputs (1)

mu_r

Type: RelativePermeability

Description: Relative magnetic permeability of ferromagnetic flux tube element