Discussion in 'Electronic Design' started by, Jan 9, 2014.

  1. Guest

    How do you derive the efficiency of a transformer from the first principle of electric circuit.
    , Jan 9, 2014
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  2. Phil Allison Guest

    ** Efficiency = power out / power in ( times 100 for percent ).

    Now YOU get to explain WFT you really want to know.

    ..... Phil
    Phil Allison, Jan 9, 2014
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  3. Hi Tim, If you wanted to keep it simple isn't there some leakage inductance(or is leakage the wrong term) that you see modeled as being in parallel (I think) with the primary, and given the leakage inductance and the windingresistance you could calculate some loss.

    George (not a transformer guy) Herold
    George Herold, Jan 9, 2014
  4. If you are really determined, you could try studying some of the heavy
    electrical engineering textbooks from the 1940s and 50s. They will give
    the sort of information you need, but mainly aimed at the design of
    massive power-distribution transformers where you really do have to
    calculate first and build later.

    That will give you some idea of the factors at work and the ball-park
    figures you can expect, then you will have to scale everything to suit
    the size of transformer you are interested in.
    Adrian Tuddenham, Jan 9, 2014
  5. Robert Baer Guest

    WHAT "first principle"?
    From the theoretical definition? Answer is 100 percent.

    Ignore the bushwah and look at losses: IR winding losses and induced
    magnetic core losses; that will get you close to measured losses.
    Robert Baer, Jan 10, 2014
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