Modelica.Magnetic.FluxTubes.Sources

Sources of different complexity of magnetomotive force and magnetic flux

Information


This package contains sources of a magnetic potential difference or a magnetic flux:

Extends from Modelica.Icons.SourcesPackage (Icon for packages containing sources).

Package Content

NameDescription
Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticPotentialDifference ConstantMagneticPotentialDifference Constant magnetomotive force
Modelica.Magnetic.FluxTubes.Sources.SignalMagneticPotentialDifference SignalMagneticPotentialDifference Signal-controlled magnetomotive force
Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticFlux ConstantMagneticFlux Source of constant magnetic flux
Modelica.Magnetic.FluxTubes.Sources.SignalMagneticFlux SignalMagneticFlux Signal-controlled magnetic flux source


Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticPotentialDifference Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticPotentialDifference

Constant magnetomotive force

Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticPotentialDifference

Information


Magnetic circuits under steady-state conditions, i.e., with stationary magnetic fields (change of magnetic flux dΦ/dt = 0) can be described with constant sources of a magnetic potential difference or magnetomotive force (mmf). Constant magnetic potential differences are imposed by

For modelling of reluctance actuators with this source component it is assumed that the armature is fixed so that no motion-induced flux change dΦ/dt can occur.

Extends from Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary (Partial component with two magnetic ports p and n for textual programming).

Parameters

TypeNameDefaultDescription
MagneticPotentialDifferenceV_m Magnetic potential differnce [A]

Connectors

TypeNameDescription
PositiveMagneticPortport_pPositive magnetic port
NegativeMagneticPortport_nNegative magnetic port

Modelica definition

model ConstantMagneticPotentialDifference 
  "Constant magnetomotive force"

  extends Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary;
  parameter SI.MagneticPotentialDifference V_m "Magnetic potential differnce";
  SI.MagneticFlux Phi "Magnetic flux from port_p to port_n";

equation 
  V_m = port_p.V_m - port_n.V_m;
  Phi = port_p.Phi;
  0 = port_p.Phi + port_n.Phi;

end ConstantMagneticPotentialDifference;

Modelica.Magnetic.FluxTubes.Sources.SignalMagneticPotentialDifference Modelica.Magnetic.FluxTubes.Sources.SignalMagneticPotentialDifference

Signal-controlled magnetomotive force

Modelica.Magnetic.FluxTubes.Sources.SignalMagneticPotentialDifference

Information


In electromagnetic devices, a change of a coil's magnetic flux linkage Ψ reacts on the electrical subsystem in that a voltage v is induced due to Faraday's law:

    v = - dΨ/dt

This reaction can possibly be neglected for

In these cases, the magnetic potential difference or magnetomotive force imposed by a coil can easily be modelled with a signal-controlled source. Except for the neglected dynamics, steady-state actuator forces will be calculated properly in actuator models based on these sources.

Extends from Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary (Partial component with two magnetic ports p and n for textual programming).

Connectors

TypeNameDescription
PositiveMagneticPortport_pPositive magnetic port
NegativeMagneticPortport_nNegative magnetic port
input RealInputV_mMagnetic potential difference

Modelica definition

model SignalMagneticPotentialDifference 
  "Signal-controlled magnetomotive force"

  extends Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary;
  Modelica.Blocks.Interfaces.RealInput V_m "Magnetic potential difference";
  SI.MagneticFlux Phi "Magnetic flux from port_p to port_n";

equation 
  V_m = port_p.V_m - port_n.V_m;
  Phi = port_p.Phi;
  0 = port_p.Phi + port_n.Phi;
end SignalMagneticPotentialDifference;

Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticFlux Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticFlux

Source of constant magnetic flux

Modelica.Magnetic.FluxTubes.Sources.ConstantMagneticFlux

Information


Sources of a constant magnetic flux are useful for modelling of permanent magnets with Norton's magnetic equivalent circuit.

Extends from Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary (Partial component with two magnetic ports p and n for textual programming).

Parameters

TypeNameDefaultDescription
MagneticFluxPhi1Magnetic flux [Wb]

Connectors

TypeNameDescription
PositiveMagneticPortport_pPositive magnetic port
NegativeMagneticPortport_nNegative magnetic port

Modelica definition

model ConstantMagneticFlux "Source of constant magnetic flux"

  extends Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary;
  parameter SI.MagneticFlux Phi = 1 "Magnetic flux";
  SI.MagneticPotentialDifference V_m 
    "Magnetic potential difference between both ports";

equation 
  V_m = port_p.V_m - port_n.V_m;
  Phi = port_p.Phi;
  0 = port_p.Phi + port_n.Phi;
end ConstantMagneticFlux;

Modelica.Magnetic.FluxTubes.Sources.SignalMagneticFlux Modelica.Magnetic.FluxTubes.Sources.SignalMagneticFlux

Signal-controlled magnetic flux source

Modelica.Magnetic.FluxTubes.Sources.SignalMagneticFlux

Information


This source of a magnetic flux is intended for test purposes, e.g., for simulation and subsequent plotting of a softmagnetic material's magnetisation characteristics if used together with a non-linear reluctance element.

Extends from Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary (Partial component with two magnetic ports p and n for textual programming).

Connectors

TypeNameDescription
PositiveMagneticPortport_pPositive magnetic port
NegativeMagneticPortport_nNegative magnetic port
input RealInputPhiMagnetic flux

Modelica definition

model SignalMagneticFlux "Signal-controlled magnetic flux source"

  extends Modelica.Magnetic.FluxTubes.Interfaces.PartialTwoPortsElementary;
  Modelica.Blocks.Interfaces.RealInput Phi "Magnetic flux";
  SI.MagneticPotentialDifference V_m 
    "Magnetic potential difference between both ports";

equation 
  V_m = port_p.V_m - port_n.V_m;
  Phi = port_p.Phi;
  0 = port_p.Phi + port_n.Phi;
end SignalMagneticFlux;

Automatically generated Fri Nov 12 16:29:53 2010.