On Tue, Apr 29, 2025 at 03:48 PM, <thunderboy.johnson86@...> wrote:
I'm trying to model a constant power load fed by a single-phase AC source in LTspice. I seem to run into convergence failure when I run transient analysis
LTspice has a constant power load already.? See:
?
However, that is intended for .TRAN or .OP or .DC analysis, and I do not know how well it behaves for .AC analysis.? Maybe it's just fine, or maybe not.? .AC analysis is strictly linear with constant unvarying circuit elements, and a constant power load needs to vary dynamically as a function of the signal amplitude - therefore making it nonlinear (and non-constant).? It seems like that could be a real problem for .AC analysis.
?
(I am assuming that you did actually mean .AC analysis, and not time-varying signals, right?)
?
Your question implies a possible interaction between the load and the rest of the circuit.? Maybe the interaction between your circuit and the load's need to vary, result in the stability problem?? That is just a guess.
?
For a better answer, considering uploading your simulation to the group for all to see.? As always, check the guidelines on this group's webpage before attempting to upload anything.
?
Andy
?
