How to model generic spices work in multisim?

I have a model external Spice, I need to use occasionally.  I alsways have trouble with that.  It doesn't seem to be because I don't understand the models or how operation spices, but more than the conventions to set and get properly hanging nodes and other aspects of MS are ambiguous to me.

This is a model of NTC thermistor and a multisim schematic, I'm working on.  I tried many things but you do not have the errors go away.  I put back the way I started here.

This model is:

http://www.ecircuitcenter.com/circuits/therm_model1/therm_model1.htm

Can someone explain how to get this model of thermistor NTC to work in MS?

The ramp from 100V to 1V/s source matches the entry of temperature to the model.  (0-100 C, 1 ° c/sec on the grapher, if I ever get there)

Thank you

David B

Hi David,

I think that you pasted the netlist any data on the Web page in the Multisim Components Wizard. I think that it is the root of the problem. You just enter in the wizard components are really, the following lines:

. SUBCKT NTC_10K_1   1  2  4  5
ETHERM 1-3 VALUE = {I (VSENSE) * 10 K * EXP (3548 / (V (4,5) + 273) - 3548 /(25+273))}
VSENSE 3 2 DC 0
. ENDS

The remaining lines that are given to you generate the stimulus, as the voltage source that you placed in your schema.

I have corrected it and attached the circuit has been fixed. Open this in Multisim and simulate a click > analysis > DC Sweep and click on simulation. You should see the curve IV of resistance NTC operating at different temperatures.

Hope that helps.

Tags: NI Software

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