Modelica.Electrical.QuasiStationary.Machines.BasicMachines.Components

Information

This package contains components for modeling electrical machines, specially threephase induction machines, based on space phasor theory.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name	Description
PartialCore	Partial model of transformer core with 3 windings
IdealCore	Ideal transformer with 3 windings

Modelica.Electrical.QuasiStationary.Machines.BasicMachines.Components.PartialCore

Information

Parameters

Type	Name	Default	Description
Integer	m	3	Number of phases
Real	n12		Turns ratio 1:2
Real	n13		Turns ratio 1:3

Connectors

Type	Name	Description
PositivePlug	plug_p1
NegativePlug	plug_n1
PositivePlug	plug_p2
NegativePlug	plug_n2
PositivePlug	plug_p3
NegativePlug	plug_n3

Modelica definition

partial model PartialCore 
  "Partial model of transformer core with 3 windings"
  parameter Integer m(final min=1) = 3 "Number of phases";
  parameter Real n12(start=1) "Turns ratio 1:2";
  parameter Real n13(start=1) "Turns ratio 1:3";
  Modelica.SIunits.ComplexVoltage  v1[
                                     m] = plug_p1.pin.v  - plug_n1.pin.v;
  Modelica.SIunits.ComplexCurrent  i1[
                                     m] = plug_p1.pin.i;
  Modelica.SIunits.ComplexVoltage  v2[
                                     m] = plug_p2.pin.v  - plug_n2.pin.v;
  Modelica.SIunits.ComplexCurrent  i2[
                                     m] = plug_p2.pin.i;
  Modelica.SIunits.ComplexVoltage  v3[
                                     m] = plug_p3.pin.v  - plug_n3.pin.v;
  Modelica.SIunits.ComplexCurrent  i3[
                                     m] = plug_p3.pin.i;
  Modelica.SIunits.ComplexCurrent  im[
                                     m] = i1 + i2/n12 + i3/n13 
    "Magnetizing current";
  QuasiStationary.MultiPhase.Interfaces.PositivePlug plug_p1(final m=m);
  QuasiStationary.MultiPhase.Interfaces.NegativePlug plug_n1(final m=m);
  QuasiStationary.MultiPhase.Interfaces.PositivePlug plug_p2(final m=m);
  QuasiStationary.MultiPhase.Interfaces.NegativePlug plug_n2(final m=m);
  QuasiStationary.MultiPhase.Interfaces.PositivePlug plug_p3(final m=m);
  QuasiStationary.MultiPhase.Interfaces.NegativePlug plug_n3(final m=m);
equation 
//branches p1-n1, p2-n2, p3-n3
  Connections.branch(plug_p1.reference, plug_n1.reference);
  plug_p1.reference.gamma = plug_n1.reference.gamma;
  Connections.branch(plug_p2.reference, plug_n2.reference);
  plug_p2.reference.gamma = plug_n2.reference.gamma;
  Connections.branch(plug_p3.reference, plug_n3.reference);
  plug_p3.reference.gamma = plug_n3.reference.gamma;
//Define p1.reference.gamme = p2.reference.gamma = p3.reference.gamma
  Connections.branch(plug_p1.reference, plug_p2.reference);
  plug_p1.reference.gamma = plug_p2.reference.gamma;
  Connections.branch(plug_p1.reference, plug_p3.reference);
  plug_p1.reference.gamma = plug_p3.reference.gamma;
//Define p1, p2 and p3 as potential roots
//Note: transformer could be fed from primary or secondary side
  Connections.potentialRoot(plug_p1.reference);
  Connections.potentialRoot(plug_p2.reference);
  Connections.potentialRoot(plug_p3.reference);
//Current balances
  plug_p1.pin.i + plug_n1.pin.i = fill(Complex(0), m);
  plug_p2.pin.i + plug_n2.pin.i = fill(Complex(0), m);
  plug_p3.pin.i + plug_n3.pin.i = fill(Complex(0), m);
end PartialCore;

Modelica.Electrical.QuasiStationary.Machines.BasicMachines.Components.IdealCore

Information

Extends from PartialCore (Partial model of transformer core with 3 windings).

Parameters

Type	Name	Default	Description
Integer	m	3	Number of phases
Real	n12		Turns ratio 1:2
Real	n13		Turns ratio 1:3

Connectors

Type	Name	Description
PositivePlug	plug_p1
NegativePlug	plug_n1
PositivePlug	plug_p2
NegativePlug	plug_n2
PositivePlug	plug_p3
NegativePlug	plug_n3

Modelica definition

model IdealCore "Ideal transformer with 3 windings"
  extends PartialCore;
equation 
  im = fill(Complex(0), m);
  v1 = n12*v2;
  v1 = n13*v3;
end IdealCore;