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AC/DC power

Discussion in 'CNC Mills/Routers' started by Aleksejs, Jul 24, 2019.

  1. Aleksejs

    Aleksejs New
    Builder

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    Hey guys!

    I am trying to understand some things about electricity.
    Some things are really bothering me about electrical parts that i have bought.

    Let me first explain you my idea.

    I want use one power supply to supply my 3 stepper motors( one for Y and two parralel for X)

    At the moment i dont understand how can i calculate my maximal currents that i will have in my system.
    I have 230V in my flat and i will use a AC to DC power supply that will give me 60V. Power supply can handle 18A in total.
    So my question is, if i have lets say 15A current in my DC circuit. Is this current going to be in AC aswell?

    Please help me because i have ordered so many parts now and my head is exploding. I really dont want my parts to become garbage.

    P.S Steppers are Nema 34 Max curret is 7A

    Thanks in advance!
     
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Watt = Amp * Volts

    So lets say:

    18A * 60v = 1080w

    1080w / 230v = 4.7 Amps

    Of course energy conversion isnt 100% efficient as the math above suggests... But probably well under 6A for sure (if its a switchmode PSU) or 8A if its a transformer based one
     
    Aleksejs likes this.
  3. Aleksejs

    Aleksejs New
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    Okay great! that means my parts wont break!
    Thank you!
     

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