Modelica_Magnetic.FluxTube

Lumped elements representing flux tubes of different shapes

Information


Please have a look at Flux tube concept and Reluctance forces in the Users Guide for comments on the underlying concept, on the calculation of reluctance forces from lumped magnetic network models and on the thereof resulting flux tube categories and sub-packages.

Although either the magnetic reluctance Rm or its reciprocal, the magnetic permeance Gm both represent geometric and material properties of a flux tube, both quantities are computed for each flux tube of this package. This enables for convenient calculation of the net reluctance or net permeance of a magnetic circuit, e.g. for calculation of a device's inductance. In case of a parallel connection of flux tube elements, the individual permeances sum up to the net permeance. For a series connection of flux tube elements, the individual reluctances sum up to the net reluctance.

Package Content

NameDescription
Modelica_Magnetic.FluxTube.FixedShape FixedShape Flux tubes with fixed shape during simulation and linear or nonlinear material characteristics
Modelica_Magnetic.FluxTube.Force Force Flux tubes with reluctance force generation; constant permeability
Modelica_Magnetic.FluxTube.Leakage Leakage Leakage flux tubes with position-independent permeance and hence no force generation; my_r=1
Modelica_Magnetic.FluxTube.ConstantReluctance ConstantReluctance Constant reluctance


Modelica_Magnetic.FluxTube.ConstantReluctance Modelica_Magnetic.FluxTube.ConstantReluctance

Constant reluctance

Modelica_Magnetic.FluxTube.ConstantReluctance

Information


This constant reluctance is provided for test purposes and simple magnetic network models. The reluctance is not calculated from geometry and permeability of a flux tube, but is provided as a parameter.


Parameters

TypeNameDefaultDescription
ReluctanceR_m1Magnetic reluctance [H-1]

Connectors

TypeNameDescription
PositiveMagneticPortpPositive magnetic port
NegativeMagneticPortnNegative magnetic port

Modelica definition

model ConstantReluctance "Constant reluctance" 
  
  extends Modelica_Magnetic.Interfaces.TwoPortComponent;
  
  parameter SI.Reluctance R_m = 1 "Magnetic reluctance";
  
  
equation 
  V_mag = Phi * R_m;
  
end ConstantReluctance;

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