Electronic Circuit analysis problem

[rsklan]

Hi everyone. I am studying at an electronic university. And I want to work on research and development in the future. Now I am a designer of some electronic circuits. I can set up schematics and blocks. But Really I can't do circuit analysis. ıf I want to set up one electronic circuit, for example;

1-) I specification my input and output voltage, current
2-) I set up block ( regulator, converter, mcu something like that)
3-) When I set my circuit. I have to simulate in the some program or that account for circuit analysis. Because I have to choose some components for electronic devices. But I can't do this.
Because I don't know my mesh current value. Because my teacher shown the linear circuit analysis but the component non-linear. I can't select components because I haven't done circuit analysis. I tried in the ltspice for simulation. But I can't find my component.
Really I am willing to this subject. I want to learn good way. Can you help me for this situation please ? Maybe as video series or sources something like that . Or maybe your can explain how to create electronic designer step to step.

And I believe, If I a solution to this problem I design so many devices.

have a healthy day.

 

[KlausST]

Hi,

I don´t understand the exact problem.

please choose a real example. A small one. With draft, with information, with schematic....
Then tell us what you can do, and where you stall.

Klaus

 

[Akanimo]

Well, in additional to circuit analysis, you need an understanding what a component is/can be used for before you'd know you have to select it. You need an understanding of how a component works, and the necessary parameters to consider, in order to be able to size it.

You need to grab some textbooks. Select a simple project and start off. Solve problems as you encounter them and you will gain motivation as you reach a milestone.

 

[rsklan]

Okay, I will try to explanatory information. for instance on grid UPS. I will make this project. firstly I am searching for some sources. After that, I set it up the schematic. my first problem is correct component selection. Because I can't figure out circuit analysis. You can see my schematic design first in the picture. Let's suppose that choose the correct component and I made a circuit analysis.

For example; I had to find one 3-phase bldc motor driver circuit for a drone motor in the stm application note.(pictures 2 and 3) After that, I decided maybe that can set simulation. But I can't find the spice model. Sometimes I can find but sometimes I can't find it. If I learn the correct simulation method or analysis. I will successful.

I mean that can research and I set some schematic. But after that step I can't simulate. Really I wonder How is your circuit step. I know my input and output but I can't do circuit analysis. If you there are some advice ( how can I choose the correct component or How can I set up to correct simulation and analysis) Really I will be happy forever. And I searched transformer design for a push-pull converter about 4 months ago. Just I found a good answer over here. And I will find my problem solution here I know that.I want to improve my job. And really I am avid to this situation. But I don't have any helpful my around. But the internet really stronger in so many ways. Have a healthy day.​

They I had use Tvs Diode and some filter capaticor. But How can they decided that value ?

 

[KlausST]

Hi,

I asked for a small example. But you showed a complete system.
You first need the overview, but then you deed to divide them down to much smaller units.
Then solve one after the other.
I often go from target (output) back to input.

********

So you want to build a drone. (Target)
Then you have mechanical size, weight..
Thus you could calculate the motor specification.(mechanical values --> electrical values)
Electrical motor values --> motor power stage values
And so on...

****

About simulation:
It seems you think you can't design a circuit without simulation.
But for me this is the usual way. For decades now. I use simulations very, very rarely.
They may be useful, but they are surely not mandatory.

Klaus

 

[dick_freebird]

I learn better when I am working on a project that "pulls
me through the text" and don't retain much just reading.

However I might suggest books like "The Art of Electonics"
which can be found in electronic form. Likewise some of
the old Radio Shack "Experimenter's ..." series if you
want pre-planned projects.

There's too much going on, to not focus.

You can design without simulation. Refine, not so much
(other than cut-and-try, which is what I use simulation for).
When you get past maybe a dozen active components
you'll be way ahead simulating, compared to soldering,
provided you can get all the models, know your care-abouts
and all that. Don't need to know nuthin', to make a solder
blob.

 

[rsklan]

Firstly Thanks for your recommendation ( KlausST,dick_freebird, Akanimo). Now I began flyback converter. And I calculated some values for example input, output, Lp, transformer radio, etc. I will choose a component ( by the way maybe you can advise about component selection, sources etc). After I will try simulation and I will Altium designer program. You are really right about your idea. I agree with you. When we make the project we are better to learn. But My country is expensive in the electronic component. And now I didn't work anywhere. just only I have to work on pc. And I thought as a solution my problem. If I use an emulator program for example proteus. I can write code and set up circuits over there. Now I began c program. I used c program one year ago. And I didn't come anything else idea my mind. Your really good person. Because your was experience imparting to me.This my situation I think your understand me. If your have any advice I will listen to your good idea. Thanks for everything.

 

[Akanimo]

Please show the requirements for your flyback, values for the parameters you have calculated and the components you have attempted to select and we will advice accordingly. Try a google search with keywords like "best power electronics books", purchase some of the books and proceed from there.