Iconic Diagrams\Thermal\Generators
Domains: Continuous. Size: 1-D. Kind: Iconic Diagrams (Pseudothermal, Electric).
This is a model of a linear thermistor. Thermistors are thermally sensitive resistors and have, according to type, a negative (NTC), or positive (PTC) resistance/temperature coefficient. For linear thermistors the resistance and voltage equation can be written as:
R = R_ref*(1 + alpha*(p_th.T - T_ref));
p_el.u = p_el.i * R;
where R_ref is the reference resistance at reference temperature T_ref and alpha the temperature coefficient of resistance. The actual temperature of the themistor is given by the pseudothermal port of the model , p_el.T. The heat generated by the thermistor is equal to
p_th.dQ = p_el.u * p_el.i;
The electrical port p of the thermistor model has separate high and low terminals. The equations are:
p_el.i = p_high_el.i = p_low_el.i;
p_el.u = p_el_high.u - p_el_low.u;
Ports |
Description |
p_el_high p_el_low p_th |
Both terminals of the Electric port.
The pseudothermal port |
Causality |
|
indifferent p_el fixed heat flow out p_th |
|
Parameters |
|
R_ref T_ref alpha |
Reference resistance [Ohm]. Reference temperature [K]. Temperature coefficient of the resistance [] |