Converting DC to AC

Discussion in 'Off Grid Living' started by -06, Jan 28, 2014.


  1. -06

    -06 Monkey+++

    Question: Welders are basically an AC to DC transformed converter. Why could one not be "inverted" to bring the battery bank back to AC voltage? Any engineers out there? Small "buzz box" welders are under $200--anyone ever tried this?
     
  2. techsar

    techsar Monkey+++

    My "buzz box" has an AC output...

    Are you thinking of hooking a dc model up backward (power from batteries, output [hopefully] ac)? That isn't going to work without additional circuitry...

    If I am reading you wrong, kindly ignore or expound on your train of thought :)
     
  3. kckndrgn

    kckndrgn Moderator Moderator Founding Member

    I don't weld, but with the price of DC -> AC inverters being what they are why rig something up that may end up making the welder unusable for anything?
    Just use the right tool for the job and get the inverter you need. I keep 2 in my truck. A 400w for most things and a 700w that is used at our off-grid cabin.
     
  4. kellory

    kellory An unemployed Jester, is nobody's fool. Banned

    You are talking about the difference between a rectifier and an invertor.
    When AC is run through a bridge rectifier, instead of a sign wave (as it went in) all the humps are now above the line in positive territory. (++++++++ instead of +-+-+-+-+-) the diodes only pass current one way though, so there is no going back the other way.
    To go from DC to AC is a bit more complicated. For that you need an inverter. (Which requires a different approach.) Nice thought though.;)
     
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  5. kellory

    kellory An unemployed Jester, is nobody's fool. Banned

    Last edited: Jan 28, 2014
  6. kellory

    kellory An unemployed Jester, is nobody's fool. Banned

    It can be done, with a large enough budget, but it is more like pushing sausage back through the grinder and expecting a pig to emerge.
     
  7. VHestin

    VHestin Farm Chick

    Does that mean pushing PlayDough back through the shape press won't make cash emerge?
     
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  8. kckndrgn

    kckndrgn Moderator Moderator Founding Member

    So in other words, just the way the government works?
     
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  9. kellory

    kellory An unemployed Jester, is nobody's fool. Banned

    Define "works"[cow]
     
  10. ghrit

    ghrit Ambulatory anachronism Administrator Founding Member

    Yeah, they keep trying that experiment hoping for different results.
     
  11. -06

    -06 Monkey+++

    Thanks for the input. Was just a thought. Glad someone knows his stuff. LOL, never did like reconstituted pig.
     
    kellory likes this.
  12. kellory

    kellory An unemployed Jester, is nobody's fool. Banned

    I'm a service tech. I usually get to see what's left when someone tries to make pig like that.:rolleyes:
     
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