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Bench PSU

Discussion in 'Power Electronics' started by HellasTechn, Jan 2, 2016.

  1. Martaine2005

    Martaine2005

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    May 12, 2015
    OK, my contribution is 'Don't complicate things':)

    Martin
     
  2. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    LOL, thanks sweet-heart, trust you to come up with that :)
    Adam
     
  3. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    e.t What's that? one of these :)

    ET_thegreenplanet_icon.jpg
     
    Martaine2005 likes this.
  4. HellasTechn

    HellasTechn

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    Apr 14, 2013
    E.T go home !!!!

    Electronic Technician i would say, or are we alliens ?
     
    Arouse1973 likes this.
  5. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Here is my evenings attempt LOL. I have tried not to over complicate it. I haven't yet added the sense terminals, need to work that out. Now I don't know what voltages your transformer will put out so I have based this on a 15 V input. At the moment the max voltage is 13.5 Volts and the max current is 1 Amp. This can be tweaked if needed. All the components are critical and it's just what came to mind and what I had in the spice library. I have labelled the circuit with all the major parts. See what you think.
    Thanks
    Adam

    PSU_ISSUE1.PNG
     
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  6. HellasTechn

    HellasTechn

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    Well as mentioned in post 1 the transformer can provide 36volts and 6 amps. After taking a glimps on this circuit i noticed the power transistors. how about using the 2N3055 and lm741 or lm318?
     
    Last edited: Jan 6, 2016
  7. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Well I hope you took more than a glimpse at the circuit after I spent my evening designing / drawing it for you :)

    Sure you can change the OP-amps, it would be better to use rail to rail output types so you get max voltage output. Changing the output transistors is also not a problem, but changing them to higher power types will require a larger base current to achieve max output current.

    You just have to make sure the first drive transistor can supply this amount of current, and also the OP-amp driving the first drive transistor can supply enough base current. If I get time I might look at making this on a proper PCB and see how it works. I need to sense terminals and current limiting LED. I am also thinking of adding a brown out detection circuit for power outage.

    Thanks
    Adam
     
  8. HellasTechn

    HellasTechn

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    Apr 14, 2013
    Dont get me wrong i jast have not time to study the circuit at the moment because of work and familly (wife,children).
    Thank you so much for your efford and for the time you spend !
     
  9. HellasTechn

    HellasTechn

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    I found this diagram on-line but can it handle 2-36 volts 6amps ? i am not sure.
    Your design is much better though.
     

    Attached Files:

  10. Martaine2005

    Martaine2005

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    Did you mean are NOT critical?:)
    I really like this Adam. Let me check it properly and see where we can improve this.:p
    Hehe...

    Martin
     
  11. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    I am only pulling your leg. I love helping people I do it for a bit of fun.
    Adam
     
  12. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    LOL yeah non-critical, thanks for the offer sweetie. Please any suggestions other than you can do this with an LM317 :)
     
  13. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Not sure, do you have the link of the website? We are yet to know how well mine will work until we have built it. I think over the next few weeks I am going to do a PCB layout and when I have the money I'll get a PCB made.
    Adam
     
  14. HellasTechn

    HellasTechn

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    You do know that i can build it for you right ? I may as well do it for free if it is small enough like 7cmx10cm
    or 10cmx15cm

    Here is the link to the site:

    http://ludens.cl/Electron/Ps20/Ps20.html
     
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  15. Martaine2005

    Martaine2005

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    Sounds like a great idea Constantine..:)
    Love to see team work!!

    Martin
     
  16. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Just starting the Layout.
    PSUPCB1.PNG
     
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  17. HellasTechn

    HellasTechn

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    Why not ? Isnt that why we all joined this forum after all ?

    WOW that is fast !

    ha the magic word FREE. lol

    Just kidding.
     
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  18. Arouse1973

    Arouse1973 Adam

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    What do you mean you may as well do it for free?
    Thanks
    Adam
     
    Martaine2005 likes this.
  19. HellasTechn

    HellasTechn

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    You said you wanted to order the pcb when you have monay. I offered to do it for free. Without monay.
    Since you help me all the time, you know out of courtesy.
    Ok maybe only 5-6 euro for the shipping.

    P.S. i would love it if you could use Express PCB to make the layout !
     
    Last edited: Jan 6, 2016
  20. HellasTechn

    HellasTechn

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    Apr 14, 2013
    Got to go friends. talk to you tomorrow.
     
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