model HollowCylinderAxialFlux "(Hollow) cylinder with axial flux; fixed shape; linear or non-linear material characteristics"
extends FluxTubes.Interfaces.PartialFixedShape;
parameter SI.Length l = 0.01 "Axial length (in direction of flux)"
annotation (Dialog(
group = "Fixed geometry",
groupImage = "modelica://Modelica/Resources/Images/Magnetic/FluxTubes/Shapes/HollowCylinderAxialFlux.png"));
parameter SI.Radius r_i = 0 "Inner radius of hollow cylinder (zero for cylinder)"
annotation (Dialog(group = "Fixed geometry"));
parameter SI.Radius r_o = 0.01 "Outer radius of (hollow) cylinder"
annotation (Dialog(group = "Fixed geometry"));
equation
A = pi * (r_o ^ 2 - r_i ^ 2);
G_m = mu_0 * mu_r * A / l;
annotation (
defaultComponentName = "cylinder",
Documentation(info = "<html>\n<p>\nPlease refer to the enclosing sub-package <a href=\"modelica://Modelica.Magnetic.FluxTubes.Shapes.FixedShape\">FixedShape</a> for a description of all elements of this package and to <a href=\"modelica://Modelica.Magnetic.FluxTubes.UsersGuide.Literature\">[Ro41]</a> for derivation and/or coefficients of the equation for permeance G_m.\n</p>\n\n<p>\nSet the inner radius r_i=0 for modelling of a solid cylindric flux tube.\n</p>\n</html>"));
end HollowCylinderAxialFlux;