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Andy, I am surprised at your response; you are typically very on point! The OP stated: “convergence failure when I run transient analysis” That zero crossing… That said, with two devices, I was

For AC analysis of an active network, isn't the "gain" at the operating point used? If so, does that load function provide a stable operating point - that is, can an operating point really be found?

Smoother functions are almost always better, in terms of stability and avoiding instability. What zero crossing?? If it is an .AC analysis that you're doing, there are no zero-crossings.? There are

I am not sure how that relates to the circuit elements and their equations that you used.? But note that the formula for P has a significant discontinuity at V(vout) = 5.? The discontinuity also

LTspice has a constant power load already.? See: https://www.analog.com/en/resources/technical-articles/ltspice-modeling-constant-power-loads.html However, that is intended for .TRAN or .OP or .DC

Hi all, 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 What I’m doing: * I’m using a

try this /g/LTspice/files/z_yahoo/Examples/Apps/pwm4_Pulse.zip

I do not understand why the "|" character is there in the LTwiki page for "Undocumented LTspice".? I am sure that was a typo.? As far as I know, the pipe character is never used anywhere in LTspice

Try removing the pipe. That part of the documentation is confusing. The example showing the pipe doesn't mean you should add it. Using the syntax from the other clearer example: PWL REPEAT FOREVER (

Is it possible to make a PWM signal a continuous voltage source ? I have these PWL points in a file but simulating this I have transient response and decay behaviour. I would like to do a FFT on the

Perhaps you forgot to substitute your computer's "path" to the standard.dio file, in the ".lib" statement.? Obviously, eT edited that line to remove his computer's unique path. I did mean LTspice

Hi, This topic can be closed. I translated the description incorrectly (conductance vs. resistance)... Thanks. Marco

Thanks! That was the missing piece. The topology checker removes I1 and then the dc-sweep accesses that, which may or may not cause a crash. Will be fixed. Best Regards, Mathias

I have to say that, while I did not try very large or complicated simulations, I never had LTspiceXVII crash. -- This

I have found the mistake. I translated the description incorrectly (conductance vs. resistance)

It crashes in 24.1.4, too. The "expanded" netlist is: LTspice 24.1.4 for Windows Circuit: I:\tony\Desktop\Test.cir Start Time: Mon Apr 28 10:51:01 2025 ??? --- Expanded Netlist --- V1 ADJ 0 DC=0

I'd be quite interested in any evidence that could substantiate this claim. And with "before", I take it you don't mean LTspiceXVII, because I had that crashing multiple times per hour on bad days.

Hi, First of all: Many thanks to all forum members. The group is really very helpful and detailed. I have read several times that gshunt, for example, can be used for convergence problems. According

I can't reproduce this. All I get when I run this netlist is an error message about the file "standard.dio" not being found. Best Regards, Mathias

Thanks a lot Dave, it looks exactly like what I need. J From: <[email protected]> on behalf of "Bell, Dave via groups.io" <Dave.Bell@...> Reply to: <[email protected]> Date: Sunday, 27