Simulink Model for ohmic heating in a resistor
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Mukti Chaturvedi
il 16 Lug 2022
Commentato: Mukti Chaturvedi
il 27 Lug 2022
I need to model temperature rise of a resistor due to joule heating with a variable supply or a variable resistor. Is there a simulink component that can be used for this or it has to be implemented with the physical equations fed into block diagrams?
Can someone help give an idea of how this can be modeled?
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David John
il 18 Lug 2022
Have a look at the Variable Resistor and Thermal Resistor blocks. The source code should be available for both of these blocks.
If you start from the Thermal Resistor source code, you can simply change R from being a parameter to being an input:
inputs
R = { 0.0, 'Ohm' }; % R:left
end
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David John
il 26 Lug 2022
Modificato: David John
il 26 Lug 2022
If you are making a custom block, change the line "intermediates (Access=private, ExternalAccess=none)" to "intermediates (Access=private, ExternalAccess=observe)", and then R will appear in the simlog.
Or simply extract i, p.v and n.v from the simlog and plot (p.v-n.v)./i against T.
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