sharpie7
In the startIteration() method in the LampElm class, how are these formulas and parameters obtained?
In the startIteration() method in the LampElm class, how are these formulas and parameters obtained?
void startIteration() { // based on http://www.intusoft.com/nlpdf/nl11.pdf double nom_r = nom_v*nom_v/nom_pow; // this formula doesn't work for values over 5390 double tp = (temp > 5390) ? 5390 : temp; resistance = nom_r*(1.26104 - 4.90662*Math.sqrt(17.1839/tp - 0.00318794) - 7.8569/(tp - 187.56)); double cap = 1.57e-4*nom_pow; double capw = cap * warmTime/.4; double capc = cap * coolTime/.4; //System.out.println(nom_r + " " + (resistance/nom_r)); temp += getPower()*sim.timeStep/capw; double cr = 2600/nom_pow; temp -= sim.timeStep*(temp-roomTemp)/(capc*cr); // sim.console("lampsi " + temp + " " + capc + " " + nom_pow); }
looks like it could be similar to a thermistor
Hello, do you have any reference materials?
maybe try this? https://www.eevblog.com/forum/projects/electrical-model-for-incandescent-lamp/ or search for PTC thermistor graph/model