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transformer amperage

Discussion in 'Electronics Homework Help' started by J.E, Apr 1, 2011.

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  1. J.E

    J.E

    3
    0
    Apr 1, 2011
    how do you calculate primary amps to secondary amps for a transformer? Is there a standard ratio for all transformers?:rolleyes:
     
  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    No.
    Transformers are designed for a particular purpose. If the voltage is transformed down by a factor of 2, then you would expect the permitted output current to be increased by a factor of about 2. With multiple secondaries, the permitted current in each secondary will depend on the wire diameter (resistance).
     
  3. lexroxas

    lexroxas

    37
    0
    Apr 15, 2011
    The primary and secondary currents depend on the turns ratio of the transformer. The turns ratio is N1/N2. N1 is the number of turns of the primary windings and N2 is the number of turns of the secondary windings. The current to turns ratio relationship is given by the formula: N1/N2 = I2/I1. I2 is the secondary current and I1 is the primary current. Also, the voltage to current relationship is given by the formula: V1/V2=I2/I1. V1 is the primary voltage and V2 is the secondary voltage.
     
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