Remove saturation from DCCE model and examle

m-kormann · Apr 28, 2023 · f89b36b · f89b36b
1 parent 856d2b3
commit f89b36b
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Showing 3 changed files with 12 additions and 38 deletions.
diff --git a/Modelica/Electrical/Machines/BasicMachines/DCMachines/DC_CompoundExcited.mo b/Modelica/Electrical/Machines/BasicMachines/DCMachines/DC_CompoundExcited.mo
@@ -46,31 +46,14 @@ model DC_CompoundExcited "Compound excited linear DC machine"
     annotation (Dialog(group="Operational temperatures", enable=not useThermalPort));
   parameter Real excitationTurnsRatio(start=-0.005) "Ratio of series excitation turns over shunt excitation turns"
     annotation (Dialog(tab="Excitation"));
-  parameter Boolean considerSaturation=true "Consider saturation of excitation inductance"
-    annotation (Dialog(tab="Excitation", group="Saturation"), choices(checkBox=true));
-  parameter SI.Inductance Lzer=Le*10 "Inductance near current=0"
-    annotation (Dialog(
-      tab="Excitation",
-      group="Saturation",
-      enable=considerSaturation));
-  parameter SI.Inductance Linf=Le/10 "Inductance at large currents"
-    annotation (Dialog(
-      tab="Excitation",
-      group="Saturation",
-      enable=considerSaturation));
   output SI.Voltage vee=pin_eep.v - pin_en.v "Field shunt excitation voltage";
   output SI.Voltage ves=pin_esp.v - pin_en.v "Field series excitation voltage";
   output SI.Current iee=pin_eep.i "Field shunt excitation current";
   output SI.Current ies=pin_esp.i "Field series excitation current";
   Machines.BasicMachines.Components.AirGapDC airGapDC(
     final turnsRatio=turnsRatio,
-    considerSaturation=considerSaturation,
     final Le=Lme,
-    final quasiStatic=quasiStatic,
-    Inom=IeNominal,
-    Lnom=Lme,
-    Lzer=Lzer*(1 - sigmae),
-    Linf=Linf*(1 - sigmae))        annotation (Placement(transformation(extent={{-10,-10},{10,10}}, rotation=270)));
+    final quasiStatic=quasiStatic) annotation (Placement(transformation(extent={{-10,-10},{10,10}}, rotation=270)));
   Machines.BasicMachines.Components.CompoundDCExcitation compoundDCExcitation(final excitationTurnsRatio=
         excitationTurnsRatio) annotation (Placement(transformation(extent={{-10,-30},{10,-10}})));
   Modelica.Electrical.Analog.Basic.Ground ground

diff --git a/Modelica/Electrical/Machines/Examples/DCMachines/DCCE_Generator.mo b/Modelica/Electrical/Machines/Examples/DCMachines/DCCE_Generator.mo
@@ -34,17 +34,14 @@ model DCCE_Generator "Test example: DC with compound excitation generating power
     alpha20a=dcceData.alpha20a,
     alpha20e=dcceData.alpha20e,
     TeOperational=293.15,
-    excitationTurnsRatio=dcceData.excitationTurnsRatio,
-    considerSaturation=dcceData.considerSaturation,
-    Lzer=dcceData.Lzer,
-    Linf=dcceData.Linf)
-                     annotation (Placement(transformation(extent={{-20,-50},{0,-30}})));
+    excitationTurnsRatio=dcceData.excitationTurnsRatio)
+      annotation (Placement(transformation(extent={{-20,-50},{0,-30}})));
   Modelica.Blocks.Sources.Ramp ramp(
     duration=tRamp,
     startTime=tStart,
     height=-100,
     offset=101)
-              annotation (Placement(transformation(extent={{60,0},{40,20}})));
+      annotation (Placement(transformation(extent={{60,0},{40,20}})));
   Modelica.Electrical.Analog.Basic.Ground ground annotation (Placement(
         transformation(
         origin={-70,40},
@@ -62,6 +59,11 @@ model DCCE_Generator "Test example: DC with compound excitation generating power
   parameter Utilities.ParameterRecords.DcCompoundExcitedData dcceData(excitationTurnsRatio=-7e-4)
     "DC machine data"
     annotation (Placement(transformation(extent={{-20,-80},{0,-60}})));
+  Analog.Sources.ConstantVoltage constantVoltage(V=Ve)
+    annotation (Placement(transformation(
+        origin={-50,-30},
+        extent={{-10,-10},{10,10}},
+        rotation=90)));
 equation
   connect(dcce.pin_esp,dcce. pin_an) annotation (Line(points={{-20,-34},{-20,-30},{-16,-30}}, color={0,0,255}));
   connect(speed.flange,dcce. flange) annotation (Line(points={{40,-40},{0,-40}}, color={0,0,0}));
@@ -71,8 +73,9 @@ equation
   connect(ramp.y, variableResistor.R) annotation (Line(points={{39,10},{12,10}}, color={0,0,127}));
   connect(variableResistor.p, dcce.pin_en)
     annotation (Line(points={{0,20},{0,40},{-24,40},{-24,-40},{-20,-40}}, color={0,0,255}));
-  connect(dcce.pin_eep, dcce.pin_ap)
-    annotation (Line(points={{-20,-46},{-30,-46},{-30,-14},{0,-14},{0,-30},{-4,-30}}, color={0,0,255}));
+  connect(constantVoltage.n, dcce.pin_en)
+    annotation (Line(points={{-50,-20},{-50,-10},{-24,-10},{-24,-40},{-20,-40}}, color={0,0,255}));
+  connect(constantVoltage.p, dcce.pin_eep) annotation (Line(points={{-50,-40},{-50,-50},{-20,-50},{-20,-46}}, color={0,0,255}));
   annotation (experiment(StopTime=2.0, Interval=1E-4, Tolerance=1E-6), Documentation(
         info="<html>
 <h4>Test example: Compound excited DC machine with a variable resistor as load</h4>

diff --git a/Modelica/Electrical/Machines/Utilities/ParameterRecords/DcCompoundExcitedData.mo b/Modelica/Electrical/Machines/Utilities/ParameterRecords/DcCompoundExcitedData.mo
@@ -28,18 +28,6 @@ record DcCompoundExcitedData "Common parameters for DC machines"
   parameter SI.Temperature TeNominal=293.15
     "Nominal series excitation temperature"
     annotation (Dialog(tab="Nominal parameters"));
-  parameter Boolean considerSaturation=true "Consider saturation of excitation inductance"
-    annotation (Dialog(tab="Excitation", group="Saturation"), choices(checkBox=true));
-  parameter SI.Inductance Lzer=Le*10 "Inductance near current=0"
-    annotation (Dialog(
-      tab="Excitation",
-      group="Saturation",
-      enable=considerSaturation));
-  parameter SI.Inductance Linf=Le/10 "Inductance at large currents"
-    annotation (Dialog(
-      tab="Excitation",
-      group="Saturation",
-      enable=considerSaturation));
   annotation (
     defaultComponentName="dcseData",
     defaultComponentPrefixes="parameter",