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A Transformer Flux and Exciting Current

  1. Apr 16, 2016 #1
    Can anyone explain in a transformer, how could a non-sinusoidal wave of exciting current produces a sinusoidal wave of flux?
     
  2. jcsd
  3. Apr 16, 2016 #2

    Hesch

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    Gold Member

    Say you have a triangular exciting current. If you Fourier transform this current, it will have a dominant first harmonic ( sine wave ).

    It will also have a lot of higher harmonics, that are dampened due to self induction and iron losses in the transformer. Hence you will see a flux wave that is similar to a sine wave, but is not a perfect sine wave.
     
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