Re: LM324 based automatic voltage stabilizer circuit simulation
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Am autotransformer is modelled as several inductors in series, paying attention to the “start” marker. Once the inductors are lined up, write one “K” directive, to define the coupling among them; typically, something like “K1 L1 L2 L3 L4 0.98”. The stray single winding is handled exactly the same way, and should be one of the L’s in the K directive.. Regarding the winding “start” indicator: It will not appear until there is a K statement referring to it, so you may need to flip polaraties after they are all placed and the K statement is in place.
Dave
From: LTspice@groups.io <LTspice@groups.io> On Behalf Of
MD MUBDIUL HASAN via groups.io
Sent: Wednesday, December 25, 2024 10:13 AM To: ltspice@groups.io Subject: EXTERNAL: Re: [LTspice] LM324 based automatic voltage stabilizer circuit simulation
Andy, Thank you to come up some good advice and suggestions. I do believe that if I start drawing circuit in LTspice, may be others can help me for bug fixing, After a time it will be doable. I saw a autotransformer design, that has been done in LTspice, implementing some K factors.
I beg pardon if I violate the group guideline. Looking at the wrong circuit diagram, I found it in online. Some technician might have draw it in some places. I will look for it again.
This type of cheap product was available in market, I also need to understand this circuit can operate with over and under voltage or not. "cut off" situation is important.
I will post the correct file for sure.
On Wednesday, December 25, 2024 at 03:44:57 PM GMT+1, Andy I via groups.io <ai.egrps+io@...> wrote:
On Tue, Dec 24, 2024 at 02:50 PM, MD MUBDIUL HASAN wrote:
The simple answer to your question is this:
LTspice is quite capable of simulating electronic circuits such as this. It is one of the most capable simulators for that. Why go to another tool when you have one of the best in front of you?
That being said, your next step is getting good or good-enough SPICE models for all the parts. R's, C's, and most L's are not a problem. Semiconductors, maybe no problem either, but people come up with obscure transistors and then expect someone else to make them a model. Often a model borrowed from another part is good enough.
Pots can be simulated as two resistors in series, as everyone knows that is what they are.
And then there are the transformers and relays.
Linear transformers (where the core has no hysteresis and does not saturate) are simple to make in SPICE but you need to find the inductances, turns ratio, and DC resistance, and often nobody knows what they are, so that is part of your job. If you have a schematic such as this which has no clues on it, then your work is cut out for you.
Relays? Do you really need to simulate them? You must understand why. And then you can come up with a basic model that works well enough.
Now let's start with a few other matters:
Andy
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Bell, Dave