WOLFRAM SYSTEM MODELER
HollowCylinderCircumferentialFluxHollow cylinder with circumferential flux; fixed shape; linear or non-linear material characteristics |
SystemModel["Modelica.Magnetic.FluxTubes.Shapes.FixedShape.HollowCylinderCircumferentialFlux"]
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Please refer to the enclosing sub-package FixedShape for a description of all elements of this package and to [Ro41] for derivation and/or coefficients of the equation for permeance G_m
.
For hollow cylindrical flux tubes with a circumferential magnetic flux, the flux density is a function of the radius.
For that reason, the characteristic mu_r(B)
is evaluated for the flux density at the flux tube's mean radius.
For those flux tube sections of a magnetic device that have a nonlinear material characteristic mu_r(B)
and a large aspect ratio of outer to inner radius r_o/r_i
, the section can be split up in a series connection of several hollow cylindrical flux tubes with radial flux. This allows for more realistic modelling of the dependence of flux density on the radius compared to modelling with just one flux tube element.
nonLinearPermeability |
Value: true Type: Boolean Description: = true, if non-linear rel. permeability is used, otherwise constant rel. permeability |
---|---|
mu_rConst |
Value: 1 Type: RelativePermeability Description: Constant relative permeability; used if nonLinearPermeability = false |
material |
Value: Material.SoftMagnetic.BaseData() Type: BaseData Description: Ferromagnetic material characteristics; used if nonLinearPermeability = true |
l |
Value: 0.02 Type: Length (m) Description: Width (orthogonal to flux direction) |
r_i |
Value: 0.01 Type: Radius (m) Description: Inner radius of hollow cylinder |
r_o |
Value: 0.02 Type: Radius (m) Description: Outer radius of hollow cylinder |
alpha |
Value: pi / 2 Type: Angle (rad) Description: Angle of cylinder section |
port_p |
Type: PositiveMagneticPort Description: Positive magnetic port |
|
---|---|---|
port_n |
Type: NegativeMagneticPort Description: Negative magnetic port |
material |
Type: BaseData Description: Ferromagnetic material characteristics; used if nonLinearPermeability = true |
---|
ToroidalCoreQuadraticCrossSection Modelica.Magnetic.FluxTubes.Examples.BasicExamples Educational example: iron core with airgap |