model VariableImpedance "Multiphase variable impedance"
extends Interfaces.TwoPlug;
parameter Modelica.SIunits.Temperature T_ref[m] = fill(293.15, m) "Reference temperatures";
parameter Modelica.SIunits.LinearTemperatureCoefficient alpha_ref[m] = zeros(m) "Temperature coefficient of resistance (R_actual = R_ref*(1 + alpha_ref*(heatPort.T - T_ref))";
extends Modelica.Electrical.MultiPhase.Interfaces.ConditionalHeatPort(final mh = m, T = T_ref);
parameter Boolean frequencyDependent = false "Consider frequency dependency, if true"
annotation (
Evaluate = true,
HideResult = true,
choices(checkBox = true));
parameter Modelica.SIunits.Frequency f_ref = 1 "Reference frequency, if frequency dependency is considered"
annotation (Dialog(enable = frequencyDependent));
ComplexBlocks.Interfaces.ComplexInput Z_ref[m] "Variable complex impedances"
annotation (Placement(
transformation(
origin = {0, 120},
extent = {
{-20, -20},
{20, 20}},
rotation = 270),
iconTransformation(
extent = {
{-20, -20},
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rotation = 270,
origin = {0, 120})));
SinglePhase.Basic.VariableImpedance variableImpedance[m](final T_ref = T_ref, final alpha_ref = alpha_ref, each final useHeatPort = useHeatPort, final T = T, final frequencyDependent = fill(frequencyDependent, m), final f_ref = fill(f_ref, m)) annotation (Placement(transformation(extent = {
{-10, -10},
{10, 10}})));
equation
connect(variableImpedance.Z_ref,Z_ref) annotation (Line(
points = {
{0, 12},
{0, 64},
{0, 120}},
color = {85, 170, 255}));
connect(variableImpedance.heatPort,heatPort) annotation (Line(
points = {
{0, -10},
{0, -100}},
color = {191, 0, 0}));
connect(variableImpedance.pin_n,plugToPins_n.pin_n) annotation (Line(
points = {
{10, 0},
{39, 0},
{68, 0}},
color = {85, 170, 255}));
connect(variableImpedance.pin_p,plugToPins_p.pin_p) annotation (Line(
points = {
{-10, 0},
{-24.5, 0},
{-39, 0},
{-68, 0}},
color = {85, 170, 255}));
annotation (
defaultComponentName = "impedance",
Icon(
coordinateSystem(
preserveAspectRatio = false,
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{100, 100}}),
graphics = {
Line(
points = {
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points = {
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color = {85, 170, 255}),
Rectangle(
extent = {
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{70, -30}},
lineColor = {85, 170, 255},
fillColor = {255, 255, 255},
fillPattern = FillPattern.Solid),
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points = {
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lineColor = {85, 170, 255},
fillColor = {85, 170, 255},
fillPattern = FillPattern.Solid),
Text(
extent = {
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textString = "%name",
lineColor = {0, 0, 255}),
Text(
extent = {
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textString = "m=%m")}),
Documentation(info = "<html>\n<p>The impedance model represents a <strong>series</strong> connection of a resistor and either an inductor or capacitor\nin each phase.<br>\n<img src=\"modelica://Modelica/Resources/Images/Electrical/QuasiStationary/SinglePhase/Basic/RX_impedance.png\"></p>\n\n<p>\nThe linear impedance connects the complex voltage <code><u>v</u></code> with the\ncomplex current <code><u>i</u></code> by <code><u>i</u>*<u>Z</u> = <u>v</u></code> in each phase,\nusing <code>m</code>\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.SinglePhase.Basic.VariableImpedance\">\nvariable singlephase impedances</a>.\nThe impedances <code>Z_ref = R_ref + j*X_ref</code> are given as complex input signals, representing the\nresistive and reactive components of the input impedances. The resistive\ncomponents are modeled temperature dependent, so the real part <code>R_actual = real(<u>Z</u>)</code> are determined from\nthe actual operating temperatures and the reference input resistances <code>real(Z_ref)</code>.\n<a href=\"modelica://Modelica.Electrical.MultiPhase.Interfaces.ConditionalHeatPort\">Conditional heat ports</a> are considered.\nThe reactive components <code>X_actual = imag(<u>Z</u>)</code>\nare equal to <code>imag(Z_ref)</code> if <code>frequencyDependent = false</code>.\nFrequency dependency is considered by <code>frequencyDependent = true</code>, distinguishing two cases:\n</p>\n\n<dl>\n<dt>(a) <code>imag(Z_ref) > 0</code>: inductive case</dt>\n<dd>The actual reactances <code>X_actual</code> are proportional to <code>f/f_ref</code></dd>\n<dt>(b) <code>imag(Z_ref) < 0</code>: capacitive case</dt>\n<dd>The actual reactances <code>X_actual</code> are proportional to <code>f_ref/f</code></dd>\n</dl>\n\n<h4>Note</h4>\n<p>\nZero crossings of the real or imaginary parts of the impedance signals <code>Z_ref</code> could cause\nsingularities due to the actual structure of the connected network.\n</p>\n\n<h4>See also</h4>\n<p>\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.SinglePhase.Basic.VariableResistor\">VariableResistor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.Resistor\">Resistor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.Conductor\">Conductor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.Capacitor\">Capacitor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.Inductor\">Inductor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.Impedance\">Impedance</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.Admittance\">Admittance</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.VariableConductor\">Variable conductor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.VariableCapacitor\">Variable capacitor</a>,\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.VariableInductor\">Variable inductor</a>\n<a href=\"modelica://Modelica.Electrical.QuasiStationary.MultiPhase.Basic.VariableAdmittance\">Variable admittance</a>\n</p>\n</html>"));
end VariableImpedance;