varistor simulation request
Although the varistor characteristics were simulated using hyperperspice, the transient analysis does not show the characteristic values I expect, and only the DC sweep analysis simulates the correct characteristics. For your information, we simulated a varistor product called S20K275 from TDK. While I-V curves are good for dc sweeps, transient analysis results in incorrect overcurrent flow at low voltages. Also, I would like to ask you to add the varistor model itself to the psim, not the hyperspice. Thank you.
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Dear User,
Thanks for raising this topic. PSIM allows for highly customizable component designs. You can leverage math blocks, controlled sources and lookup tables to build custom models.
A varistor can be modeled as a voltage-controlled resistor as its resistance changes in response to variations in voltage. The non-linearitites can be modeled with a lookup table. You can digitize the graph from the datasheet and use a lookup table to model the variable resistor effect:
Using the Lookup Table to Make a Variable Resistor
To give you an idea of what is possible, please feel free to explore our more complex articles on:
How to create a variable capacitor in PSIM
How to create a variable inductor in PSIM