model SignalMagneticPotentialDifference "Signal-controlled magnetomotive force"
extends FluxTubes.Interfaces.PartialTwoPortsElementary;
Modelica.Blocks.Interfaces.RealInput V_m(unit = "A") "Magnetic potential difference"
annotation (Placement(
transformation(
origin = {0, 90},
extent = {
{10, -10},
{-10, 10}},
rotation = 90),
iconTransformation(
extent = {
{10, -10},
{-10, 10}},
rotation = 90,
origin = {0, 110})));
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},
{100, 100}}),
graphics = {
Line(
points = {
{-100, 0},
{-50, 0}},
color = {255, 127, 0}),
Line(
points = {
{50, 0},
{100, 0}},
color = {255, 127, 0}),
Text(
extent = {
{-150, 50},
{150, 90}},
textString = "%name",
lineColor = {0, 0, 255}),
Ellipse(
extent = {
{-50, -50},
{50, 50}},
lineColor = {255, 127, 0},
fillColor = {255, 255, 255},
fillPattern = FillPattern.Solid),
Line(
points = {
{-50, 0},
{50, 0}},
color = {255, 127, 0}),
Line(
points = {
{-70, 30},
{-70, 10}},
color = {255, 128, 0}),
Line(
points = {
{-80, 20},
{-60, 20}},
color = {255, 128, 0}),
Line(
points = {
{60, 20},
{80, 20}},
color = {255, 128, 0})}),
Documentation(info = "<html>\n<p>\nIn electromagnetic devices, a change of a coil's magnetic flux linkage Ψ reacts on the electrical subsystem in that a voltage v is induced due to <em>Faraday</em>'s law:\n</p>\n<pre>\n v = - dΨ/dt\n</pre>\n<p>This reaction can possibly be neglected for</p>\n<ul>\n<li>modelling of electromagnetic actuators under quasi-stationary conditions (slow current change, slow armature motion),</li>\n<li>modelling of current-controlled electromagnetic actuators (ideal current source) and</li>\n<li>for system simulation where the system dynamics is not governed by an electromagnetic actuator, but by the surrounding subsystems.</li>\n</ul>\n<p>\nIn these cases, the magnetic potential difference or magnetomotive force imposed by a coil can easily be modelled with a signal-controlled source. Except for the neglected dynamics, steady-state actuator forces will be calculated properly in actuator models based on these sources.\n</p>\n</html>"));
end SignalMagneticPotentialDifference;