Re: Sine modulated PWM voltage source (PWL file=xxx)
Mathias,The error message clearly led me to the correct guess of the problem, time sequence out of order or unrealizable (zero or negative time step).?? Christoph,I've never used a text file to
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Richard E Church
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#160043
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Re: Sine modulated PWM voltage source (PWL file=xxx)
No, not necessarily.? There is a checkbox when you upload, which sends an auto-generated message, which most everyone ignores, and it self-destructs in a few days.? We ask that you always *compose*
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Andy I
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#160042
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Re: Sine modulated PWM voltage source (PWL file=xxx)
Just to be clear, those two lines of data look like this: which then expands into this: Andy
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Andy I
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#160041
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Re: Sine modulated PWM voltage source (PWL file=xxx)
Christoph, In the first of the two files you uploaded (kuku_pwm_pulses.txt.zip), you have some data points that are not sequential.? The very first line is this: which has a point at 0.000 us, then
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Andy I
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#160040
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Re: Sine modulated PWM voltage source (PWL file=xxx)
It's difficult to find the location in the generated data. Easier it would be to avoid the situation at the side where the data is generated. -- Christoph
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Christoph
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#160039
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Re: Sine modulated PWM voltage source (PWL file=xxx)
Forgot the mechanism how uploads work here. Is the group notified automatically when an upload occurs? Recall there's been something like this. Anyway, here's the link to my recent upload:
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Christoph
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#160038
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Re: Non-converging oscillation problem of inverse Jiles-Atherton model in LTspice
You can use anything you like for net names containing any printable Latin character, except these: (? )? {? } ? '? *? = ,? :? ;? and space. My curiosity showed that even many non-Latin
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Tony Casey
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#160037
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Re: Sine modulated PWM voltage source (PWL file=xxx)
Sorry, I will upload the whole project in a minute. -- Christoph
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Christoph
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#160036
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Re: Sine modulated PWM voltage source (PWL file=xxx)
I'm really trying hard to make the error messages clear, but there is always room for improvement. The message "time value pairs for V1 out of chronological order" means that there are at least two
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Mathias Born
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#160035
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Re: Sine modulated PWM voltage source (PWL file=xxx)
Will do that. Nonetheless it would be helpful if I can have a look at the documentation. I'd better had documented what I did a year before :) Just uploaded kuku_pwm_pulses.txt to the tem area:
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Christoph
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#160034
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Re: Sine modulated PWM voltage source (PWL file=xxx)
I suggest you upload your pwm_pulses.txt, so we can see what you did, and send a new message to say that you uploaded it. -- Best wishes John Woodgate RAYLEIGH Essex OOO-Own Opinions Only
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John Woodgate
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#160033
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Sine modulated PWM voltage source (PWL file=xxx)
I'm again at simulating a PWM. The pulses are generated from a file with the statement: PWL file=pwm_pulses.txt It's a while back I generated that file or in other words, I generated a new dataset for
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Christoph
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#160032
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Re: Non-converging oscillation problem of inverse Jiles-Atherton model in LTspice
"pi", "e", "k", ... are short identifiers. The user may want to use these names for node names/labels or in expressions (K for gain or coupling factor, Pi for input power, e for error...). This can be
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mhx@...
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#160031
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Re: Non-converging oscillation problem of inverse Jiles-Atherton model in LTspice
Thanks! It looks like the trtol setting played a crucial role¡ªit successfully reduced the oscillations. The reason behind the oscillation of sgn(dHdt) was likely that the tolerance for the
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limengfan81@...
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#160030
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Re: MJ11021 Darlington NPN & PNP pair model help needed.
If they are the same die, then their SPICE models would be the same.? SPICE transistor models usually do not include the package (unless they are for upper RF frequencies). Andy
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Andy I
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#160029
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Re: MJ11021 Darlington NPN & PNP pair model help needed.
Tony, I was not aware! I will use them and test. Thank you for your prompt response. Nima
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nima
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#160028
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Re: MJ11021 Darlington NPN & PNP pair model help needed.
Andy, Thank you for pointing out my mistakes. I will correct them. I started with current source as the obvious choice. I will go back to it. Thank you for your help. Nima
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nima
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#160027
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Re: Hello guys. Please help my Thesis. I want to make Comparators design of sar adc i have built Comparator in LTspice i wanna analysis. But i cant PLEASE HELP ME OUT
On Wed, Apr 23, 2025 at 03:46 AM, @Imprazu wrote four times: Golly.? You sound desperate.? It looks like you do not know what you are doing. Why should anyone help you *write your Thesis* ?? Isn't
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Andy I
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#160026
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Re: Diode TVS like zener in LTspice??
If you connected them in anti-parallel, then each diode's forward voltage (very small) dominates and it would never reach the avalanche voltage in either direction. *[Mod note:? The following
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Andy I
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#160025
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Edited
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Re: Non-converging oscillation problem of inverse Jiles-Atherton model in LTspice
That's correct. I'm still left wondering why only pi is defined for analysis. Of course, for "e", it's shorter to define it: .param e exp(1) -- Regards, Tony
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Tony Casey
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#160024
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