/// <summary>
/// Generate a capacitor
/// </summary>
/// <param name="name">Name</param>
/// <param name="parameters">Parameters</param>
/// <param name="netlist">Netlist</param>
/// <returns></returns>
protected ICircuitObject GenerateCap(CircuitIdentifier name, List <Token> parameters, Netlist netlist)
{
Capacitor cap = new Capacitor(name);
cap.ReadNodes(netlist.Path, parameters);
// Search for a parameter IC, which is common for both types of capacitors
for (int i = 3; i < parameters.Count; i++)
{
if (parameters[i].kind == ASSIGNMENT)
{
AssignmentToken at = parameters[i] as AssignmentToken;
if (at.Name.image.ToLower() == "ic")
{
double ic = netlist.ParseDouble(at.Value);
cap.CAPinitCond.Set(ic);
parameters.RemoveAt(i);
break;
}
}
}
// The rest is just dependent on the number of parameters
if (parameters.Count == 3)
{
cap.CAPcapac.Set(netlist.ParseDouble(parameters[2]));
}
else
{
cap.SetModel(netlist.FindModel <CapacitorModel>(parameters[2]));
switch (parameters[2].kind)
{
case WORD:
case IDENTIFIER:
cap.SetModel(netlist.Path.FindModel <CapacitorModel>(netlist.Circuit.Objects, new CircuitIdentifier(parameters[2].image)));
break;
default:
throw new ParseException(parameters[2], "Model name expected");
}
netlist.ReadParameters(cap, parameters, 2);
if (!cap.CAPlength.Given)
{
throw new ParseException(parameters[1], "L needs to be specified", false);
}
}
return(cap);
}
public void When_CapacitorIsTemperatureDependent_Expect_Reference()
{
/*
* A test for a lowpass RC circuit (DC voltage, resistor, capacitor)
* The initial voltage on capacitor is 0V. The result should be an exponential converging to dcVoltage.
* TC1 and TC2 of capacitor is 0.
* Temperature is 30 degrees.
*/
double dcVoltage = 10;
var resistorResistance = 10e3; // 10000;
double factor = (1.0 + 3.0 * 1.1 + 3.0 * 3.0 * 2.1);
var capacitance = 1e-6;
var capacitanceAfterTemperature = capacitance * factor;
var tau = resistorResistance * capacitanceAfterTemperature;
var capacitor = new Capacitor("C1", "OUT", "0", capacitance);
var model = new CapacitorModel("C1");
model.ParameterSets.Get <ModelBaseParameters>().TemperatureCoefficient1.Value = 1.1;
model.ParameterSets.Get <ModelBaseParameters>().TemperatureCoefficient2.Value = 2.1;
capacitor.SetModel(model);
// Build circuit
var ckt = new Circuit(
capacitor,
new Resistor("R1", "IN", "OUT", resistorResistance),
new VoltageSource("V1", "IN", "0", dcVoltage));
// Create simulation, exports and references
var tran = new Transient("tran", 1e-8, 10e-6);
tran.Configurations.Get <TimeConfiguration>().InitialConditions["OUT"] = 0.0;
tran.BeforeTemperature += (sender, args) =>
{
((BaseSimulationState)args.State).Temperature = Circuit.CelsiusKelvin + 30.0;
};
Export <double>[] exports = { new RealPropertyExport(tran, "C1", "v") };
Func <double, double>[] references = { t => dcVoltage * (1.0 - Math.Exp(-t / tau)) };
// Run
AnalyzeTransient(tran, ckt, exports, references);
}