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Update documentation
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Add <code> for Modelica variables
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christiankral committed Jun 26, 2021
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Expand Up @@ -118,27 +118,38 @@ equation
info="<html>
<p>An ideal frequency inverter is modeled by using a VfController and a three-phase SignalVoltage.
Frequency is raised by a ramp, causing the induction machine with squirrel cage to start,
and accelerating inertias. At time tStep a load step is applied.</p>
and accelerate inertias. At time <code>tStep</code> a load step is applied.</p>
<p>Simulate for 1.5 seconds and plot (versus time):</p>
<ul>
<li>currentQuasiRMSSensor.I: stator current RMS</li>
<li>aimc.wMechanical: motor's speed</li>
<li>aimc.tauElectrical: motor's torque</li>
<li><code>currentQuasiRMSSensor.I</code>: stator current RMS</li>
<li><code>aimc.wMechanical</code>: machine speed</li>
<li><code>aimc.tauElectrical</code>: machine torque</li>
<li><code>fs</code>: stator frequency</li>
<li><code>fr</code>: rotor frequency</li>
<li><code>s</code>: slip</li>
</ul>
<p>
Compare with transient models
<a href=\"modelica://Modelica.Electrical.Machines.Examples.InductionMachines.IMC_Inverter\">IMC_Inverter (Electrical.Machines)</a> and
<a href=\"modelica://Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.InductionMachines.IMC_Inverter\">IMC_Inverter (FundamentalWave)</a>.
Note that electrical transients are neglected, but mechanical transients are taken into account.
</p>
<h4>Theoretical thoughts</h4>
<p>
By setting the stator resistance <code>Rs = 0</code>, comparing the quasistatic point of operation for different frequencies <code>f</code>,
it can be seen that in the base region <code>f &le; fNominal</code> rotor frequency <code>fr</code> is constant,
whereas in the field weakening region <code>f &ge; fNominal</code> slip is constant,
if load torque is adapted accordingly <code>tau = tauNominal*fNominal/f</code>.
</p>
By setting the stator resistance <code>Rs = 0</code>, comparing quasistatic points of operation for different stator frequencies <code>fs</code>,
it can be seen that</p>
<ul>
<li>in the base region <code>fs &le; fNominal</code> rotor frequency <code>fr</code> is constant, if the load torque is constant,<li>
<li>whereas in the field weakening region <code>f &ge; fNominal</code> slip is constant,
if load torque is adapted according to <code>tau = tauNominal*fNominal/f</code>.</li>
</ul>
<p>Default machine parameters are used.</p>
</html>"));
end IMC_Inverter;

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