# \#algebraic-loop

**URL:** https://forum.plexim.com/tag/algebraic-loop/389.md

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## [How to simulate a device with known V-I Equation](https://forum.plexim.com/t/how-to-simulate-a-device-with-known-v-i-equation/674)

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**Author:** [@calcupen](https://forum.plexim.com/u/calcupen)\
**Replies:** 3\
**Last updated:** [September 20, 2026, 11:34pm UTC](https://forum.plexim.com/t/how-to-simulate-a-device-with-known-v-i-equation/674 "2026-09-20T23:34:03Z")

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I am trying to simulate a metal oxide varistor. Since PLECS does not have this component, I have tried simulating it with a C-script block, a function block, or a 1D lookup table block. Attached I have the circuit I have…

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## [How to avoid algebraic loop when use variable load under external mode](https://forum.plexim.com/t/how-to-avoid-algebraic-loop-when-use-variable-load-under-external-mode/1368)

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**Author:** [@W.shawn.D](https://forum.plexim.com/u/W.shawn.D)\
**Replies:** 1\
**Last updated:** [June 6, 2024, 1:30pm UTC](https://forum.plexim.com/t/how-to-avoid-algebraic-loop-when-use-variable-load-under-external-mode/1368 "2024-06-06T13:30:10Z")

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Hi I made a three-phase grid-tied inverter integrated with pv & bess model, and using “from file” block to import solar irradiation and variable load value in 24 seconds, under simulation everything is fine, controller …

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## [Solving algebraic loop due to variable resistor in 3-LVL-ANPC under different modulation strategies](https://forum.plexim.com/t/solving-algebraic-loop-due-to-variable-resistor-in-3-lvl-anpc-under-different-modulation-strategies/1311)

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**Author:** [@THK](https://forum.plexim.com/u/THK)\
**Replies:** 3\
**Last updated:** [February 8, 2024, 10:55am UTC](https://forum.plexim.com/t/solving-algebraic-loop-due-to-variable-resistor-in-3-lvl-anpc-under-different-modulation-strategies/1311 "2024-02-08T10:55:50Z")

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Hello, I would like to investigate different modulation strategies for a 3-LVL-ANPC-SiC topology under different operating points in terms of overall efficiency and power dissipation (temperature) per switch. To genera…

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## [No specific error message for algebraic loop with C-script](https://forum.plexim.com/t/no-specific-error-message-for-algebraic-loop-with-c-script/635)

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**Author:** [@Martello](https://forum.plexim.com/u/Martello)\
**Replies:** 1\
**Last updated:** [March 11, 2019, 3:29pm UTC](https://forum.plexim.com/t/no-specific-error-message-for-algebraic-loop-with-c-script/635 "2019-03-11T15:29:33Z")

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I want to model a varistor using the functional description given by the manufacturer Littelfuse for PSPICE. The characteristic of the Varistor is modeled as a power function combined with a linear behavior around curren…