Can I simulate an NTC thermistor with the RESISTOR_VIRTUAL component in Multisim?
Primary Software Version: 12.0
Primary Software Fixed Version: N/A
Secondary Software: N/A
Problem: If I place a RESISTOR_VIRTUAL in Multisim, I am given temperature paremters such as TC1, TC2 and TNOM. Is it possible to set these parameters to make it behave like a thermistor?
In Multisim, you can simulate NTCs, but you cannot use the RESISTOR_VIRTUAL as a thermistor as it behaves like an RTD.
As temperature increases, its resistance rises according to:
How Does an NTC Thermistor Behave?
As temperature increases, its resistance gets smaller according to the R vs. T equation:
If you want to derive the equation not from the abstract values K0 and b, but from known value pairs (T0,R0) and (T1,R1), the equation reads:
Simply generate a new component with the component wizard (Tools>>Component Wizard) and within the step Select Simulation Model include a resistor model which contains this behaviour.
For example the SPICE model f 1kOhm thermistor:
Related Links: KnowledgeBase 40D2DFFE: How can I simulate a Pt100 RTD with Multisim?
- eq_NTC_recalc.gif - THERMISTOR_NTC_1kOm.zip
Report Date: 08/23/2006
Last Updated: 07/31/2012
Document ID: 40M88VFE