# 
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"Project-Id-Version: Modelica by Example v0.3.6\n"
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#: ../../source/components/subsystems/power_supply.rst:2
msgid "DC Power Supply"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:4
msgid ""
"In this section, we'll consider how a DC power supply model could be "
"implemented in Modelica.  We'll show, once again, how a flat system model "
"can be refactored to make use of a reusable subsystem model."
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:9
msgid "Flat Power Supply Model"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:11
msgid ""
"In this case, our flat system model will be the DC power supply circuit "
"shown here:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:19
msgid "Implemented in Modelica, this model looks like this:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:24
msgid ""
"This kind of power supply works by taking an AC input voltage (120V at "
"60Hz), rectifying it and then passing it through a low-pass filter. If we "
"simulate this model, we see the following voltage across the ``load`` "
"resistor:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:32
msgid ""
"Note that our target here is an output voltage of 12 volts.  However, the "
"greater the load on the power supply, the lower the quality of the output "
"signal will be.  In this particular simulation, the load is initially zero "
"(because the load connecting the switch to the power supply is open).  But "
"when the switch is closed and current begins to flow through the load (the "
"resistor named ``load``), we start to see some artifact."
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:41
msgid "Hierarchical Power Supply"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:43
msgid ""
"Once again, we'll improve upon the flat version of our system by taking some"
" collection of components and organizing them into a subsystem model.  Our "
"system level circuit then becomes:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:52
msgid ""
"This model uses the ``BasicPowerSupply`` model whose diagram is shown here:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:59
msgid ""
"The Modelica source code for this reusable power supply subsystem model is:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:65
msgid ""
"There are a couple of interesting things to note about this model. First, we"
" see the same organizational structure as we have before where parameters "
"and connectors are made ``public`` while the internal components are "
"``protected``.  We can also see the use of the :ref:`dialog-anno` annotation"
" to organize parameters into distinct groupings (in this case, "
"``\"General\"`` and ``\"Transformer\"``).  We can also see the use of the "
"``enable`` annotation in conjunction with ``considerMagnetization`` "
"parameter to selectively expose the ``Lm1`` parameter only in the cases "
"where ``considerMagnetization`` is true."
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:75
msgid ""
"Using our hierarchical system model we get, as expected, exactly the same "
"results as we got for the flat version:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:81
msgid ""
"We can augment our system model to include an additional load (that comes "
"online after some delay):"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:89
msgid ""
"In that case, if we simulate the model we can see the impact that additional"
" load will have on the quality of power supply output:"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:95
msgid ""
"By increasing the capacitance in the power supply, we can reduce the "
"amplitude of the voltage fluctuations, *e.g.,*"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:101
msgid ""
"However, if we increase the capacitance level too much, we will find that "
"the power supply output is very slow to respond to load changes, *e.g.,*"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:109
msgid "Conclusion"
msgstr ""

#: ../../source/components/subsystems/power_supply.rst:111
msgid ""
"This example illustrates, once again, how a collection of components can be "
"organized into a reusable subsystem model.  This example follows the best "
"practice of placing parameters and connectors in the ``public`` section of "
"the resulting subsystem model while keeping the internal components in the "
"``protected`` section."
msgstr ""
