| 1 | within ;
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| 2 | model TestIndexReduction2
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| 3 | "Test example: AsynchronousInductionMachineSquirrelCage inverter drive"
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| 4 | extends Modelica.Icons.Example;
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| 5 | import Modelica.Constants.pi;
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| 6 | import Modelica.Electrical.MultiPhase.Functions.factorY2DC;
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| 7 | constant Integer m=3 "Number of phases";
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| 8 | parameter Modelica.SIunits.Voltage VNominal=400
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| 9 | "Nominal RMS voltage per phase";
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| 10 | parameter Modelica.SIunits.Frequency fNominal=50 "Nominal frequency";
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| 11 | parameter Modelica.SIunits.Resistance RGrid=10e-3 "Grid choke resistance";
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| 12 | parameter Modelica.SIunits.Inductance LGrid=500e-6 "Grid choke inductance";
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| 13 | parameter Modelica.SIunits.Voltage VDC=factorY2DC(m)*VNominal/sqrt(3) "Theoretical DC voltage";
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| 14 | parameter Modelica.SIunits.Capacitance CDC=5e-3 "DC capacitor";
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| 15 | parameter Modelica.SIunits.Torque TLoad=161.4 "Nominal load torque";
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| 16 | parameter Modelica.SIunits.AngularVelocity wLoad=1440.45*2*pi/60 "Nominal load speed";
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| 17 | parameter Modelica.SIunits.Inertia JLoad=0.29 "Load's moment of inertia";
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| 18 | Modelica.Electrical.MultiPhase.Sources.SineVoltage sineVoltage(
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| 19 | final m=m,
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| 20 | final phase=-Modelica.Electrical.MultiPhase.Functions.symmetricOrientation(
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| 21 | m),
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| 22 | final freqHz=fill(fNominal, m),
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| 23 | final offset=zeros(m),
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| 24 | final startTime=zeros(m),
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| 25 | final V=fill(VNominal*sqrt(2/3), m)) annotation (Placement(transformation(
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| 26 | extent={{-10,-10},{10,10}},
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| 27 | rotation=270,
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| 28 | origin={-80,-30})));
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| 29 | Modelica.Electrical.MultiPhase.Basic.Star star(m=m) annotation (Placement(
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| 30 | transformation(
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| 31 | extent={{-10,-10},{10,10}},
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| 32 | rotation=270,
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| 33 | origin={-80,-60})));
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| 34 | Modelica.Electrical.Analog.Basic.Ground ground annotation (Placement(
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| 35 | transformation(origin={-80,-90}, extent={{-10,-10},{10,10}})));
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| 36 | Modelica.Electrical.Machines.Sensors.CurrentQuasiRMSSensor gridCurrent
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| 37 | annotation (Placement(transformation(
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| 38 | extent={{-10,10},{10,-10}},
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| 39 | rotation=270,
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| 40 | origin={-80,0})));
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| 41 | Modelica.Electrical.MultiPhase.Basic.Resistor resistor(
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| 42 | final m=m,
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| 43 | final R=fill(RGrid, m),
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| 44 | final T_ref=fill(20, m),
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| 45 | final alpha=zeros(m),
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| 46 | final T=fill(20, m)) annotation (Placement(transformation(
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| 47 | extent={{-10,-10},{10,10}},
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| 48 | rotation=90,
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| 49 | origin={-80,30})));
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| 50 | Modelica.Electrical.MultiPhase.Basic.Inductor inductor(m=m, final L=fill(
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| 51 | LGrid, m)) annotation (Placement(transformation(
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| 52 | extent={{-10,-10},{10,10}},
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| 53 | rotation=90,
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| 54 | origin={-80,60})));
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| 55 |
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| 56 | Modelica.Electrical.PowerConverters.ACDC.DiodeBridge2mPulse rectifier
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| 57 | annotation (Placement(transformation(extent={{-68,60},{-48,80}})));
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| 58 | Modelica.Electrical.Analog.Basic.Capacitor capacitor(v(fixed=true, start=VDC),
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| 59 | C=CDC) annotation (Placement(transformation(
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| 60 | extent={{-10,-10},{10,10}},
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| 61 | rotation=270,
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| 62 | origin={-30,70})));
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| 63 | Modelica.Electrical.PowerConverters.DCAC.MultiPhase2Level inverter
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| 64 | annotation (Placement(transformation(extent={{-10,-10},{10,10}}, origin={0,
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| 65 | 70})));
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| 66 | Modelica.Blocks.Sources.Ramp ramp(height=fNominal,
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| 67 | startTime=0,
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| 68 | duration=1.2)
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| 69 | annotation (
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| 70 | Placement(transformation(extent={{-10,-10},{10,10}},
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| 71 | origin={-20,-50})));
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| 72 | Modelica.Electrical.Machines.Utilities.VfController vfController(
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| 73 | final m=m,
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| 74 | VNominal=VNominal,
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| 75 | fNominal=fNominal,
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| 76 | EconomyMode=true) annotation (Placement(transformation(
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| 77 | extent={{-10,-10},{10,10}},
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| 78 | rotation=90,
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| 79 | origin={0,-20})));
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| 80 |
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| 81 | Modelica.Electrical.Machines.SpacePhasors.Blocks.ToSpacePhasor toSpacePhasor
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| 82 | annotation (Placement(transformation(
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| 83 | extent={{-10,-10},{10,10}},
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| 84 | rotation=90,
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| 85 | origin={0,10})));
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| 86 | Modelica.Electrical.PowerConverters.DCAC.Control.PWM pwm(uMax=VDC, f=2000)
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| 87 | annotation (Placement(transformation(
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| 88 | extent={{-10,-10},{10,10}},
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| 89 | rotation=90,
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| 90 | origin={0,40})));
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| 91 | Modelica.Electrical.MultiPhase.Basic.Resistor resistor1(
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| 92 | final m=m,
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| 93 | final R=fill(RGrid, m),
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| 94 | final T_ref=fill(20, m),
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| 95 | final alpha=zeros(m),
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| 96 | final T=fill(20, m)) annotation (Placement(transformation(
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| 97 | extent={{-10,-10},{10,10}},
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| 98 | rotation=90,
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| 99 | origin={48,48})));
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| 100 | Modelica.Electrical.MultiPhase.Basic.Star star1(m=m)
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| 101 | annotation (Placement(
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| 102 | transformation(
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| 103 | extent={{-10,-10},{10,10}},
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| 104 | rotation=270,
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| 105 | origin={48,18})));
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| 106 | Modelica.Electrical.Analog.Basic.Inductor inductor1(L=0.001) annotation (
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| 107 | Placement(transformation(
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| 108 | extent={{-10,-10},{10,10}},
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| 109 | rotation=-90,
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| 110 | origin={48,-20})));
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| 111 | Modelica.Electrical.Analog.Basic.Ground ground1
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| 112 | annotation (Placement(
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| 113 | transformation(origin={48,-48}, extent={{-10,-10},{10,10}})));
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| 114 | equation
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| 115 | connect(vfController.u, ramp.y)
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| 116 | annotation (Line(points={{0,-32},{0,-50},{-9,-50}},
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| 117 | color={0,0,127}));
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| 118 | connect(toSpacePhasor.u, vfController.y)
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| 119 | annotation (Line(points={{0,-2},{0,-9}}, color={0,0,127}));
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| 120 | connect(pwm.u, toSpacePhasor.y)
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| 121 | annotation (Line(points={{0,28},{0,21}}, color={0,0,127}));
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| 122 | connect(inverter.fire_p, pwm.fire_p)
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| 123 | annotation (Line(points={{-6,58},{-6,51}}, color={255,0,255}));
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| 124 | connect(inverter.fire_n, pwm.fire_n)
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| 125 | annotation (Line(points={{6,58},{6,51}}, color={255,0,255}));
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| 126 | connect(capacitor.p, inverter.dc_p) annotation (Line(points={{-30,80},{-20,80},
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| 127 | {-20,76},{-10,76}}, color={0,0,255}));
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| 128 | connect(capacitor.n, inverter.dc_n) annotation (Line(points={{-30,60},{-20,60},
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| 129 | {-20,64},{-10,64}}, color={0,0,255}));
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| 130 | connect(rectifier.dc_p, capacitor.p) annotation (Line(points={{-48,76},{-40,76},
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| 131 | {-40,80},{-30,80}}, color={0,0,255}));
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| 132 | connect(rectifier.dc_n, capacitor.n) annotation (Line(points={{-48,64},{-40,64},
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| 133 | {-40,60},{-30,60}}, color={0,0,255}));
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| 134 | connect(sineVoltage.plug_n, star.plug_p)
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| 135 | annotation (Line(points={{-80,-40},{-80,-50}}, color={0,0,255}));
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| 136 | connect(star.pin_n, ground.p)
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| 137 | annotation (Line(points={{-80,-70},{-80,-80}}, color={0,0,255}));
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| 138 | connect(resistor.plug_n, inductor.plug_p)
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| 139 | annotation (Line(points={{-80,40},{-80,50}}, color={0,0,255}));
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| 140 | connect(inductor.plug_n, rectifier.ac)
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| 141 | annotation (Line(points={{-80,70},{-68,70}}, color={0,0,255}));
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| 142 | connect(resistor.plug_p, gridCurrent.plug_p)
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| 143 | annotation (Line(points={{-80,20},{-80,10}}, color={0,0,255}));
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| 144 | connect(gridCurrent.plug_n, sineVoltage.plug_p)
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| 145 | annotation (Line(points={{-80,-10},{-80,-20}}, color={0,0,255}));
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| 146 | connect(inverter.ac, resistor1.plug_n)
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| 147 | annotation (Line(points={{10,70},{48,70},{48,58}}, color={0,0,255}));
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| 148 | connect(resistor1.plug_p, star1.plug_p)
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| 149 | annotation (Line(points={{48,38},{48,28}}, color={0,0,255}));
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| 150 | connect(star1.pin_n, inductor1.p)
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| 151 | annotation (Line(points={{48,8},{48,-10}}, color={0,0,255}));
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| 152 | connect(inductor1.n, ground1.p)
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| 153 | annotation (Line(points={{48,-30},{48,-38}}, color={0,0,255}));
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| 154 | annotation (experiment(
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| 155 | StopTime=1.5,
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| 156 | Interval=5e-05,
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| 157 | Tolerance=1e-06), Documentation(
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| 158 | info="<html>
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| 159 | <p>
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| 160 | This is a model of a complete inverter drive comprising:
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| 161 | </p>
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| 162 | <ul>
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| 163 | <li>a grid model and a line choke</li>
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| 164 | <li><a href=\"modelica://Modelica.Electrical.PowerConverters.ACDC.DiodeBridge2mPulse\">a diode rectifier</a></li>
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| 165 | <li>a buffer capacitor</li>
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| 166 | <li><a href=\"modelica://Modelica.Electrical.PowerConverters.DCAC.MultiPhase2Level\">a switching inverter</a></li>
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| 167 | <li><a href=\"modelica://Modelica.Electrical.PowerConverters.DCAC.Control.PWM\">a pulse width modulation</a></li>
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| 168 | <li><a href=\"modelica://Modelica.Electrical.Machines.Utilities.VfController\">a voltage/frequency characteristic</a></li>
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| 169 | <li>the reference frequency ramped up</li>
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| 170 | <li>an induction machine with squirrel cage</li>
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| 171 | <li>a load inertia and quadratic speed dependent load torque (like a fan or pump)</li>
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| 172 | </ul>
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| 173 | <p>Please note: Be patient, two switching devices cause many event iteratons which cost performance.</p>
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| 174 | <p>Note that due to the voltage drop the voltage at the machine can't reach the full voltage which means torque reduction.</p>
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| 175 | <p>Default machine parameters are adapted to nominal phase voltage 400 V and nominal phase current 25 A.</p>
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| 176 | </html>"),
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| 177 | uses(Modelica(version="3.2.3")));
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| 178 | end TestIndexReduction2;
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