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FluxTubes.Basic.ElectroMagneticConverter: L_stat #4739

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Merged
AHaumer merged 2 commits into from
Feb 16, 2026
+19 −7
Merged

FluxTubes.Basic.ElectroMagneticConverter: L_stat #4739

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0d91955
added a hint about L_stat and corrected usage of noEvent()
AHaumer Feb 16, 2026
5786583
Merge branch 'master' into FT_EMconverter
AHaumer Feb 16, 2026
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11 changes: 7 additions & 4 deletions Modelica/Magnetic/FluxTubes/Basic/ElectroMagneticConverter.mo
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ model ElectroMagneticConverter "Ideal electromagnetic energy conversion"

// For information only:
SI.MagneticFlux Psi "Flux linkage";
SI.Inductance L_stat "Static inductance abs(Psi/i)";
SI.Inductance L_stat "Static inductance (valid if this coil is the only source)";

protected
Real eps=100*Modelica.Constants.eps;
Expand All @@ -38,7 +38,7 @@ equation
// For information only
Psi = N*Phi;
// Use of abs() for positive results; due to Modelica sign conventions for flow into connectors
L_stat = noEvent(if abs(i) > eps then abs(Psi/i) else abs(Psi/eps));
L_stat = if noEvent(abs(i) > eps) then abs(Psi/i) else abs(Psi/eps);

annotation (
defaultComponentName="converter",
Expand Down Expand Up @@ -164,9 +164,12 @@ v is the induced voltage in the coil due to the derivative of magnetic flux &Phi
If a coil wound clockwise has to be modeled instead, the parameter N (Number of turns) can be set to a negative value.
</p>


<h4>Note</h4>
<p>
The flux linkage &Psi; and the static inductance L_stat = |&Psi;/i| are calculated for information only. Note that L_stat is set to |&Psi;/eps| if |i| &lt; eps
(= 100*Modelica.Constants.eps).
The flux linkage &Psi; and the static inductance L_stat = |&Psi;/i| are calculated for information only.
Note that L_stat is set to |&Psi;/eps| if |i| &lt; eps (= 100*Modelica.Constants.eps).<br>
<strong>Note</strong> that this local calculation of L_stat is only valid if this coil is the only source in the magnetic circuit.
</p>
</html>"));
end ElectroMagneticConverter;
15 changes: 12 additions & 3 deletions Modelica/Magnetic/FluxTubes/Basic/ElectroMagneticConverterWithLeakageInductance.mo
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ model ElectroMagneticConverterWithLeakageInductance

// For information only
SI.MagneticFlux Psi "Flux linkage";
SI.Inductance L_stat "Static inductance abs(Psi/i)";
SI.Inductance L_stat "Static inductance (valid if this coil is the only source)";

protected
constant Real eps=100*Modelica.Constants.eps;
Expand All @@ -59,7 +59,7 @@ equation
// For information only
Psi = N*Phi_ind;
//use of abs() for positive results; due to Modelica sign conventions for flow into connectors
L_stat = noEvent(if abs(i) > eps then abs(Psi/i) else abs(Psi/eps));
L_stat = if noEvent(abs(i) > eps) then abs(Psi/i) else abs(Psi/eps);

annotation (
defaultComponentName="converter",
Expand Down Expand Up @@ -158,7 +158,16 @@ equation
Line(points={{-30,-100},{-30,-60}}, color={28,108,200})}),
Documentation(info="<html>
<p>
Same as <a href=\"modelica://Modelica.Magnetic.FluxTubes.Basic.ElectroMagneticConverter\">ElectroMagneticConverter</a> with an additional leakage path on the magnetic side (leakage inductance, leakage flux). This model may improve stability especially when the magnetic circuit contains more than one electromagnetic converter.
Same as <a href=\"modelica://Modelica.Magnetic.FluxTubes.Basic.ElectroMagneticConverter\">ElectroMagneticConverter</a>
with an additional leakage path on the magnetic side (leakage inductance, leakage flux).
This model may improve stability especially when the magnetic circuit contains more than one electromagnetic converter.
</p>

<h4>Note</h4>
<p>
The flux linkage &Psi; and the static inductance L_stat = |&Psi;/i| are calculated for information only.
Note that L_stat is set to |&Psi;/eps| if |i| &lt; eps (= 100*Modelica.Constants.eps).<br>
<strong>Note</strong> that this local calculation of L_stat is only valid if this coil is the only source in the magnetic circuit.
</p>
</html>"));
end ElectroMagneticConverterWithLeakageInductance;