model QuarterHollowCylinder "Leakage flux in circumferential direction through a quarter hollow cylinder"
extends FluxTubes.Interfaces.PartialLeakage;
parameter SI.Length l = 0.1 "Axial length orthogonal to flux (=2*pi*r for cylindrical pole and r>>r_i)"
annotation (Dialog(
group = "Parameters",
groupImage = "modelica://Modelica/Resources/Images/Magnetic/FluxTubes/Shapes/Leakage/QuarterHollowCylinder.png"));
parameter Real ratio(start = 1) "Constant ratio t/r_i";
equation
G_m = 2 * mu_0 * l * Modelica.Math.log(1 + ratio) / pi;
annotation (
defaultComponentName = "leakage",
Documentation(info = "<html>\n<p>\nPlease refer to the enclosing sub-package <a href=\"modelica://Modelica.Magnetic.FluxTubes.Shapes.Leakage\">Leakage</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</html>"));
end QuarterHollowCylinder;