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Can Voltage dependent capacitance be modeled in Simscape?

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Amruta Joshi
Amruta Joshi on 21 Jul 2020
Answered: Vasco Lenzi on 3 Aug 2020
Can a voltage dependent capacitance be represented directly using capacitor or any other in built block in Simscape model? Or it has to be modelled in terms of equations using Simulink ?

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Answers (1)

Vasco Lenzi
Vasco Lenzi on 3 Aug 2020
Hi Amruta
If you have Simscape Electrical, you can use the Variable Capacitor that accepts C as a Simscape Physical Signal.
You can measure voltage over the capacitor and apply some transformation/lookup table to feed in into the C signal:
Please stay within "Simscape World" and use Simscape Physical Signals (brown Simulink-like blocks) to deal with Physical Signals insad of going into Simulink. This will make the simulation more stable.
If you don't have Simscape Electrical, you can build your own Simscape based component block using Simscape Language:

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