model AIM_SlipRing "Asynchronous induction machine with slip ring rotor"
parameter Integer mr(min = 3) = m "Number of rotor phases";
extends Modelica.Magnetic.FundamentalWave.Interfaces.PartialBasicInductionMachine(is(start = zeros(m)), Rs(start = 0.03), Lssigma(start = 3 * (1 - sqrt(0.9333)) / (2 * pi * fsNominal)), final L0(d = 2 * Lm / m / effectiveStatorTurns ^ 2, q = 2 * Lm / m / effectiveStatorTurns ^ 2), redeclare final Electrical.Machines.Thermal.AsynchronousInductionMachines.ThermalAmbientAIMS thermalAmbient(final Tr = TrOperational, final mr = mr), redeclare final Electrical.Machines.Interfaces.InductionMachines.ThermalPortAIMS thermalPort(final mr = mr), redeclare final Electrical.Machines.Interfaces.InductionMachines.ThermalPortAIMS internalThermalPort(final mr = mr), redeclare final Modelica.Electrical.Machines.Interfaces.InductionMachines.PowerBalanceAIMS powerBalance(final lossPowerRotorWinding = sum(rotor.resistor.resistor.LossPower), final lossPowerRotorCore = rotor.core.lossPower, final lossPowerBrush = 0, final powerRotor = Modelica.Electrical.MultiPhase.Functions.activePower(vr, ir)));
Modelica.Electrical.MultiPhase.Interfaces.NegativePlug plug_rn(final m = mr) "Negative plug of rotor"
annotation (Placement(transformation(extent = {
{-110, -50},
{-90, -70}})));
Modelica.Electrical.MultiPhase.Interfaces.PositivePlug plug_rp(final m = mr) "Positive plug of rotor"
annotation (Placement(transformation(extent = {
{-110, 70},
{-90, 50}})));
parameter Modelica.SIunits.Inductance Lm(start = 3 * sqrt(0.9333) / (2 * pi * fsNominal)) "Stator main field inductance"
annotation (Dialog(
tab = "Nominal resistances and inductances",
groupImage = "modelica://Modelica/Resources/Images/Electrical/Machines/IMS.png"));
parameter Modelica.SIunits.Inductance Lrsigma(start = 3 * (1 - sqrt(0.9333)) / (2 * pi * fsNominal)) "Rotor leakage inductance w.r.t. rotor side"
annotation (Dialog(tab = "Nominal resistances and inductances"));
parameter Modelica.SIunits.Inductance Lrzero = Lrsigma "Rotor zero inductance w.r.t. rotor side"
annotation (Dialog(tab = "Nominal resistances and inductances"));
parameter Modelica.SIunits.Resistance Rr(start = 0.04) "Rotor resistance per phase w.r.t. rotor side"
annotation (Dialog(tab = "Nominal resistances and inductances"));
parameter Modelica.SIunits.Temperature TrRef(start = 293.15) "Reference temperature of rotor resistance"
annotation (Dialog(tab = "Nominal resistances and inductances"));
parameter Modelica.Electrical.Machines.Thermal.LinearTemperatureCoefficient20 alpha20r(start = 0) "Temperature coefficient of rotor resistance at 20 degC"
annotation (Dialog(tab = "Nominal resistances and inductances"));
parameter Modelica.SIunits.Temperature TrOperational(start = 293.15) "Operational temperature of rotor resistance"
annotation (Dialog(
group = "Operational temperatures",
enable = not useThermalPort));
parameter Boolean useTurnsRatio(start = true) "Use TurnsRatio or calculate from locked-rotor voltage?";
parameter Real TurnsRatio(final min = Modelica.Constants.small, start = 1) "Effective number of stator turns / effective number of rotor turns"
annotation (Dialog(enable = useTurnsRatio));
parameter Modelica.SIunits.Voltage VsNominal(start = 100) "Nominal stator voltage per phase"
annotation (Dialog(enable = not useTurnsRatio));
parameter Modelica.SIunits.Voltage VrLockedRotor(start = 100 * (2 * pi * fsNominal * Lm) / sqrt(Rs ^ 2 + (2 * pi * fsNominal * (Lm + Lssigma)) ^ 2)) "Locked rotor voltage per phase"
annotation (Dialog(enable = not useTurnsRatio));
parameter Modelica.Electrical.Machines.Losses.CoreParameters rotorCoreParameters(final m = 3, PRef = 0, VRef(start = 1) = 1, wRef(start = 1) = 1) "Rotor core loss parameter record, all quantities refer to rotor side"
annotation (Dialog(tab = "Losses"));
output Modelica.SIunits.Voltage vr[mr] = plug_rp.pin.v - plug_rn.pin.v "Rotor instantaneous voltages";
output Modelica.SIunits.Current ir[mr] = plug_rp.pin.i "Rotor instantaneous currents";
protected
final parameter Real internalTurnsRatio = if useTurnsRatio then TurnsRatio else VsNominal / VrLockedRotor * (2 * pi * fsNominal * Lm) / sqrt(Rs ^ 2 + (2 * pi * fsNominal * (Lm + Lssigma)) ^ 2);
public
Components.SymmetricMultiPhaseWinding rotor(final Lsigma = Lrsigma, final effectiveTurns = effectiveStatorTurns / internalTurnsRatio, final useHeatPort = true, final RRef = Rr, final TRef = TrRef, final TOperational = TrOperational, final Lzero = Lrsigma, final GcRef = rotorCoreParameters.GcRef, final m = mr, final alpha20 = alpha20r) "Symmetric rotor winding including resistances, zero and stray inductances and zero core losses"
annotation (Placement(transformation(
origin = {0, -40},
extent = {
{-10, -10},
{10, 10}},
rotation = 90)));
equation
connect(plug_rp,rotor.plug_p) annotation (Line(
points = {
{-100, 60},
{-80, 60},
{-80, -50},
{-10, -50}},
color = {0, 0, 255}));
connect(airGap.port_rn,rotor.port_p) annotation (Line(
points = {
{-10, -10},
{-10, -30}},
color = {255, 128, 0}));
connect(airGap.port_rp,rotor.port_n) annotation (Line(
points = {
{10, -10},
{10, -30}},
color = {255, 128, 0}));
connect(rotor.plug_n,plug_rn) annotation (Line(
points = {
{10, -50},
{10, -60},
{-100, -60}},
color = {0, 0, 255}));
connect(rotor.heatPortCore,internalThermalPort.heatPortRotorCore) annotation (Line(
points = {
{10, -36},
{16, -36},
{16, -36},
{20, -36},
{20, -80},
{-39.6, -80},
{-39.6, -90.8}},
color = {191, 0, 0}));
connect(rotor.heatPortWinding,internalThermalPort.heatPortRotorWinding) annotation (Line(
points = {
{10, -44},
{20, -44},
{20, -80},
{-40, -80},
{-40, -90}},
color = {191, 0, 0}));
annotation (
defaultComponentName = "aims",
Icon(graphics = {
Line(
points = {
{-100, 50},
{-100, 20},
{-60, 20}},
color = {0, 0, 255}),
Line(
points = {
{-100, -50},
{-100, -20},
{-60, -20}},
color = {0, 0, 255})}),
Documentation(info = "<html>\n<p>\nResistances and stray inductances of the machine always refer to either stator or rotor. The symmetry of the stator and rotor is assumed. The number of stator and rotor phases may be different. The machine models take the following loss effects into account:\n</p>\n\n<ul>\n<li>heat losses in the temperature dependent stator winding resistances</li>\n<li>heat losses in the temperature dependent rotor winding resistances</li>\n<li>friction losses</li>\n<li>stator and rotor core losses (only eddy current losses, no hysteresis losses)</li>\n<li>stray load losses</li>\n</ul>\n\n<h4>See also</h4>\n<p>\n<a href=\"modelica://Modelica.Magnetic.FundamentalWave.BasicMachines.AsynchronousInductionMachines.AIM_SquirrelCage\">AIM_SquirrelCage</a>,\n</p>\n</html>"));
end AIM_SlipRing;