to calculate transformer windings

Discussion in 'Homework Help' started by ronald.dias, Nov 20, 2007.

  1. ronald.dias

    ronald.dias Thread Starter New Member

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    Nov 20, 2007
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    1
    Hi there, thanks.

    I like to know if there is 35 turns in the primary winding of a transformer and 280 turns in the secondary, how many volts is needed in the primary to result 1100 volts kindly reply.

    Thanks
    Ron
  2. beenthere

    beenthere Retired Moderator

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    Assuming a perfect transformer to voltage on the primary relates to that on the secondary according to the turns ratio. Your transformer will step up by a factor of 280/35.
  3. Rahul.Goyal

    Rahul.Goyal New Member

    Joined:
    Aug 19, 2008
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    Location:
    indore
    say n1 turns = primary side
    n2 = secondary side turn
    then by formula
    n1/n2 = vp/vs
    where vp = primary voltage
    vs = secondary voltage
    here..it is given that
    n1=35
    n2=280
    vp=?
    vs=1100 volt
    therefore
    35/280 = vp/1100
    so vp = (35*1100/280)
    = 137.5 volt
    nearly equal to 138 volt.
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