impedance ratio and transformers

Discussion in 'General Electronics Chat' started by dumindu89, Sep 15, 2012.

  1. dumindu89

    Thread Starter Member

    Oct 28, 2010
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    I need to know the relationship between the impedance ratio and the number turns of primary winding and the secondary winding of a transformer.

    For an example if we take a transformer which has an impedance ratio of 1:13 what will be the number of turns of the primary winding and secondary winding?

    Then, what would be the case if it is a center tapped transformer?
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Voltage transformation is proportional to turns ratio.
    Current transformation is inversely proportional to turns ratio.
    Impedance is proportional to the square of the turns ratio.

    On a center-tapped winding, the impedance end to end is four times the impedance between center tap and either end.
     
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