Transformer hypothetical question

Discussion in 'General Electronics Chat' started by Zatnikitelman, Oct 3, 2006.

  1. Zatnikitelman

    Thread Starter Active Member

    Jul 17, 2005
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    Just for quick reference, what would the effect be if a transformer's secondary and primary windings had the same number of turns? This might be ablittle vague, so let's say 12v AC supplying 12 Amps at 60Hz or 12v DC supplying 12 amps.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    Isolation transformers have the same number of turns in the primary and secondary. The output is the same as the input, but with no ground reference.

    Your illustration is hard to follow - transformers work on AC, not DC.
     
  3. Gadget

    Distinguished Member

    Jan 10, 2006
    613
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    thats a 1:1 ratio, which gives you the same AC volts out as in.... BUT the current is a function of the Core size and wire gauge.
     
  4. Zatnikitelman

    Thread Starter Active Member

    Jul 17, 2005
    31
    0
    Ok, thanks. But I thought tranformers worked with DC as well as AC. How does DC get stepped up and down then?
     
  5. Zatnikitelman

    Thread Starter Active Member

    Jul 17, 2005
    31
    0
    Ok, thanks. But I thought tranformers worked with DC as well as AC. How does DC get stepped up and down then?
     
  6. Gadget

    Distinguished Member

    Jan 10, 2006
    613
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    Generally it is converted to AC first, put thru a transformer, then converted back to DC at the other end..(normal with stepping up, not so common with stepping down).
    If its just a small step down, then the DC can just be divided/series passed/shunt passed.
     
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