model IdealIntermediateSwitch "Ideal intermediate switch"
parameter SI.Resistance Ron(final min = 0) = 1e-5 "Closed switch resistance";
parameter SI.Conductance Goff(final min = 0) = 1e-5 "Opened switch conductance";
extends Modelica.Electrical.Analog.Interfaces.ConditionalHeatPort(final T = 293.15);
Interfaces.PositivePin p1 annotation (Placement(
transformation(extent = {
{-110, 30},
{-90, 50}}),
iconTransformation(extent = {
{-110, 30},
{-90, 50}})));
Interfaces.PositivePin p2 annotation (Placement(
transformation(extent = {
{-110, -10},
{-90, 10}}),
iconTransformation(extent = {
{-110, -10},
{-90, 10}})));
Interfaces.NegativePin n1 annotation (Placement(
transformation(extent = {
{90, 30},
{110, 50}}),
iconTransformation(extent = {
{90, 30},
{110, 50}})));
Interfaces.NegativePin n2 annotation (Placement(
transformation(extent = {
{90, -10},
{110, 10}}),
iconTransformation(extent = {
{90, -10},
{110, 10}})));
Modelica.Blocks.Interfaces.BooleanInput control "true => p1--n2, p2--n1 connected, otherwise p1--n1, p2--n2 connected"
annotation (Placement(
transformation(
origin = {0, 120},
extent = {
{-20, -20},
{20, 20}},
rotation = 270),
iconTransformation(
extent = {
{-20, -20},
{20, 20}},
rotation = 270,
origin = {0, 120})));
protected
Real s1(final unit = "1");
Real s2(final unit = "1");
Real s3(final unit = "1");
Real s4(final unit = "1") "Auxiliary variables";
constant SI.Voltage unitVoltage = 1 annotation (HideResult = true);
constant SI.Current unitCurrent = 1 annotation (HideResult = true);
equation
LossPower = p1.i * p1.v + p2.i * p2.v + n1.i * n1.v + n2.i * n2.v;
n1.i = if control then -s1 * unitVoltage * Goff - s4 * unitCurrent else -s1 * unitCurrent - s4 * unitVoltage * Goff;
n2.i = if control then -s2 * unitVoltage * Goff - s3 * unitCurrent else -s2 * unitCurrent - s3 * unitVoltage * Goff;
p1.i = if control then s1 * unitVoltage * Goff + s3 * unitCurrent else s1 * unitCurrent + s3 * unitVoltage * Goff;
p2.i = if control then s2 * unitVoltage * Goff + s4 * unitCurrent else s2 * unitCurrent + s4 * unitVoltage * Goff;
p1.v - n1.v = s1 * unitCurrent * (if control then 1 else Ron);
p1.v - n2.v = s3 * unitCurrent * (if control then Ron else 1);
p2.v - n1.v = s4 * unitCurrent * (if control then Ron else 1);
p2.v - n2.v = s2 * unitCurrent * (if control then 1 else Ron);
annotation (
defaultComponentName = "switch",
Documentation(
info = "<html>\n<p>The intermediate switch has four switching contact pins p1, p2, n1, and n2. The switching behaviour is controlled by the input signal control. If control is true, the pin p1 is connected to the pin n2, and the pin p2 is connected to the pin n1. Otherwise,if control is false, the pin p1 is connected to n1, and the pin p2 is connected to n2.</p>\n\n<p>\n<img src=\"modelica://Modelica/Resources/Images/Electrical/Analog/IdealIntermediateSwitch1.png\"\n alt=\"IdealIntermediateSwitch1.png\">\n</p>\n\n<p>In order to prevent singularities during switching, the opened switch has a (very low) conductance Goff and the closed switch has a (very low) resistance Ron.</p>\n\n<p>\n<img src=\"modelica://Modelica/Resources/Images/Electrical/Analog/IdealIntermediateSwitch2.png\"\n alt=\"IdealIntermediateSwitch2.png\">\n</p>\n\n<p>The limiting case is also allowed, i.e., the resistance Ron of the closed switch could be exactly zero and the conductance Goff of the open switch could be also exactly zero. Note, there are circuits, where a description with zero Ron or zero Goff is not possible.</p>\n<p><strong>Please note:</strong> In case of useHeatPort=true the temperature dependence of the electrical behavior is <strong>not </strong>modelled. The parameters are not temperature dependent.</p>\n</html>",
revisions = "<html>\n<ul>\n<li><em> March 11, 2009 </em>\n by Christoph Clauss<br> conditional heat port added<br>\n </li>\n<li><em> 1998 </em>\n by Christoph Clauss<br> initially implemented<br>\n </li>\n</ul>\n</html>"),
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Text(
extent = {
{-150, 90},
{150, 50}},
textString = "%name",
lineColor = {0, 0, 255}),
Ellipse(
extent = {
{-4, 24},
{4, 16}},
lineColor = {0, 0, 255}),
Line(
points = {
{-96, 0},
{-40, 0}},
color = {0, 0, 255}),
Line(
points = {
{-96, 40},
{-40, 40}},
color = {0, 0, 255}),
Line(
points = {
{-40, 0},
{40, 40}},
color = {0, 0, 255}),
Line(
points = {
{-40, 40},
{40, 0}},
color = {0, 0, 255}),
Line(
points = {
{40, 40},
{96, 40}},
color = {0, 0, 255}),
Line(
points = {
{40, 0},
{96, 0}},
color = {0, 0, 255})}),
Diagram(coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}})));
end IdealIntermediateSwitch;