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Examples/InductionMachines/IMC_DCBraking.mo #4691

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bd89ffd
enhances Examples/InductionMachines/IMC_DCBraking.mo to avoid problems
AHaumer Sep 12, 2025
4db77e4
Merge branch 'master' into IMC_DCBraking
AHaumer Sep 12, 2025
c2e59f6
Merge branch 'master' into IMC_DCBraking
AHaumer Sep 15, 2025
01790e6
corrected Examples/InductionMachines/IMC_DCBraking.mo
AHaumer Sep 15, 2025
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69 changes: 34 additions & 35 deletions Modelica/Electrical/Machines/Examples/InductionMachines/IMC_DCBraking.mo
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ within Modelica.Electrical.Machines.Examples.InductionMachines;
model IMC_DCBraking "Induction machine with DC current braking"
extends Modelica.Icons.Example;
import Modelica.Constants.pi;
import Modelica.Electrical.Machines.Thermal.convertResistance;
constant Integer m=3 "Number of phases";
parameter SI.AngularVelocity w0(displayUnit="rev/min")=
2*pi*imcData.fsNominal/imcData.p "Initial mechanical speed";
Expand All @@ -11,8 +12,14 @@ model IMC_DCBraking "Induction machine with DC current braking"
SI.Torque tauShaft=imc.tauShaft "Shaft torque";
SI.AngularVelocity wMechanical(displayUnit="rev/min") = imc.wMechanical
"Shaft speed";
parameter Modelica.Electrical.Machines.Utilities.DcBrakeSettings settings(INominal=
100, layout="D3")
parameter Modelica.Electrical.Machines.Utilities.DcBrakeSettings settings(
INominal=100,
R=convertResistance(
imcData.Rs,
imcData.TsRef,
imcData.alpha20s,
imc.TsOperational),
layout="D3")
annotation (Placement(transformation(extent={{20,60},{40,80}})));
parameter
Modelica.Electrical.Machines.Utilities.ParameterRecords.IM_SquirrelCageData
Expand Down Expand Up @@ -49,50 +56,32 @@ model IMC_DCBraking "Induction machine with DC current braking"
annotation (Placement(transformation(extent={{-20,70},{-40,90}})));
Modelica.Electrical.Polyphase.Basic.PlugToPin_p plugToPin2(m=m, k=2)
annotation (Placement(transformation(extent={{-20,30},{-40,50}})));
Modelica.Electrical.Polyphase.Basic.PlugToPin_p plugToPin3(m=m, k=3) if settings.connect3
Modelica.Electrical.Polyphase.Basic.PlugToPin_p plugToPin3(m=m, k=3)
annotation (Placement(transformation(extent={{-20,-10},{-40,10}})));
Modelica.Electrical.Analog.Sources.ConstantCurrent
constantCurrent(I=settings.Idc)
Analog.Sources.ConstantVoltage
constantVoltage(V=settings.Vdc)
annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
extent={{10,-10},{-10,10}},
rotation=90,
origin={-50,62})));
Modelica.Electrical.Analog.Basic.Ground ground
annotation (Placement(transformation(extent={{-70,20},{-50,40}})));
Blocks.Sources.BooleanConstant booleanConstant(k=settings.layout == "Y2")
annotation (Placement(transformation(extent={{-90,0},{-70,20}})));
Analog.Ideal.IdealOpeningSwitch switch annotation (
Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=90,
origin={-50,10})));
initial equation
if settings.layout=="Y3" then
//imc.is[2]=settings.is[2];
der(imc.is[2])=0;
der(imc.idq_rs[1])=0;
der(imc.idq_rs[2])=0;
end if;
if settings.layout=="Y2" then
der(imc.idq_rs[1])=0;
der(imc.idq_rs[2])=0;
end if;
if settings.layout=="D2" then
//imc.is[2]=settings.is[2];
der(imc.is[2])=0;
der(imc.idq_rs[1])=0;
der(imc.idq_rs[2])=0;
end if;
if settings.layout=="D3" then
//der(imc.idq_ss[1])=0;
//der(imc.idq_ss[2])=0;
der(imc.is[1])=0;
der(imc.is[2])=0;
der(imc.idq_rs[1])=0;
der(imc.idq_rs[2])=0;
imc.idq_ss=zeros(2);
imc.idq_rs=zeros(2);
if settings.layout=="D2" or settings.layout=="D3" then
imc.i_0_s=0;
end if;
equation
connect(imc.flange, loadInertia.flange_a)
annotation (Line(points={{40,0},{50,0}}, color={0,0,0}));
connect(plugToPin1.pin_p, constantCurrent.n)
annotation (Line(points={{-32,80},{-50,80},{-50,72}}, color={0,0,255}));
connect(plugToPin2.pin_p, constantCurrent.p)
annotation (Line(points={{-32,40},{-50,40},{-50,52}}, color={0,0,255}));
connect(constantCurrent.p, plugToPin3.pin_p)
annotation (Line(points={{-50,52},{-50,0},{-32,0}}, color={0,0,255}));
connect(plugToPin2.plug_p, plugToPin1.plug_p) annotation (Line(points={{-28,40},
{-20,40},{-20,80},{-28,80}}, color={0,0,255}));
connect(plugToPin2.plug_p, plugToPin3.plug_p) annotation (Line(points={{-28,40},
Expand All @@ -105,6 +94,16 @@ equation
annotation (Line(points={{-28,40},{30,40},{30,12}}, color={0,0,255}));
connect(plugToPin2.pin_p, ground.p)
annotation (Line(points={{-32,40},{-60,40}}, color={0,0,255}));
connect(booleanConstant.y, switch.control)
annotation (Line(points={{-69,10},{-62,10}}, color={255,0,255}));
connect(switch.p, plugToPin3.pin_p)
annotation (Line(points={{-50,0},{-32,0}}, color={0,0,255}));
connect(ground.p, switch.n)
annotation (Line(points={{-60,40},{-50,40},{-50,20}}, color={0,0,255}));
connect(constantVoltage.p, plugToPin1.pin_p)
annotation (Line(points={{-50,72},{-50,80},{-32,80}}, color={0,0,255}));
connect(ground.p, constantVoltage.n)
annotation (Line(points={{-60,40},{-50,40},{-50,52}}, color={0,0,255}));
annotation (experiment(
StopTime=25,
Interval=0.001,
Expand Down
7 changes: 7 additions & 0 deletions Modelica/Electrical/Machines/Utilities/DcBrakeSettings.mo
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
within Modelica.Electrical.Machines.Utilities;
record DcBrakeSettings "Setting for DC current braking"
parameter SI.Current INominal=100 "Nominal RMS current per phase";
parameter SI.Resistance R=0.03 "Phase resistance at desired temperature";
parameter String layout="Y3" "Braking connection layout"
annotation (choices(
choice="Y3" "Y 3 phases",
Expand All @@ -25,6 +26,12 @@ record DcBrakeSettings "Setting for DC current braking"
elseif layout=="D2" then Idc*{2/3,-1/3,-1/3}
else Idc*{1/2,-1/2,0}
"Phase currents" annotation(Dialog(group="Results", enable=false));
parameter SI.Voltage Vdc=
if layout == "Y3" then 3/2*R*INominal*sqrt(2)
elseif layout == "Y2" then 2.0*R*INominal*sqrt(3/2)
elseif layout == "D2" then 2/3*R*INominal*3/sqrt(2)
else 1/2*R*INominal*sqrt(6) "DC braking voltage"
annotation (Dialog(group="Results", enable=false));
annotation (defaultComponentPrefixes="parameter",
Icon(coordinateSystem(preserveAspectRatio=false), graphics={
Rectangle(
Expand Down
20 changes: 9 additions & 11 deletions ...delica/Electrical/Machines/Examples/InductionMachines/IMC_DCBraking/comparisonSignals.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,12 +1,10 @@
time
imc.idq_rr[1]
imc.idq_rr[2]
loadInertia.phi
loadInertia.w
imc.idq_sr[1]
imc.idq_sr[2]
imc.is[1]
imc.is[2]
tauElectrical
tauShaft
wMechanical
imc.idq_ss[1]
imc.idq_ss[2]
imc.idq_rs[1]
imc.idq_rs[2]
imc.wMechanical
imc.phiMechanical
imc.tauElectrical
imc.tauShaft

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