model ConstantMagneticPotentialDifference "Constant magnetomotive force"
extends FluxTubes.Interfaces.PartialTwoPortsElementary;
parameter SI.MagneticPotentialDifference V_m "Magnetic potential difference";
SI.MagneticFlux Phi "Magnetic flux from port_p to port_n";
equation
0 = port_p.Phi + port_n.Phi;
Phi = port_p.Phi;
V_m = port_p.V_m - port_n.V_m;
annotation (
defaultComponentName = "magVoltageSource",
Icon(
coordinateSystem(
preserveAspectRatio = false,
extent = {
{-100, -100},
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graphics = {
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extent = {
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lineColor = {255, 127, 0},
fillColor = {255, 255, 255},
fillPattern = FillPattern.Solid),
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{100, 0},
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color = {255, 127, 0}),
Line(
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textString = "%name",
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color = {255, 128, 0}),
Line(
points = {
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color = {255, 128, 0})}),
Documentation(info = "<html>\n<p>\nMagnetic circuits under steady-state conditions, i.e., with stationary magnetic fields (change of magnetic flux dΦ/dt = 0) can be described with constant sources of a magnetic potential difference or magnetomotive force (mmf). Constant magnetic potential differences are imposed by\n</p>\n<ul>\n<li>coils with stationary current (di / dt = 0) and</li>\n<li>permanent magnets modelled with <em>Thévenin</em>'s equivalent magnetic circuit.</li>\n</ul>\n<p>\nFor modelling of reluctance actuators with this source component it is assumed that the armature is fixed so that no motion-induced flux change dΦ/dt can occur.\n</p>\n</html>"));
end ConstantMagneticPotentialDifference;