Hey Folks, I am a third year electrical engineering student and just want to clarify a concept involving electromagnetics/transformers.(adsbygoogle = window.adsbygoogle || []).push({});

When supplying magnetization current to a transformer (assume sinusoidal), this induces a time changing magnetic flux in the core. The time changing magnetic flux then induces an emf.

1) Is this emf a result of an induced electric field in the core of the transformer, or in the coil?

-Since the core and coil are both conductors, would it be both? I understand eddy currents trying to oppose the change in flux, so we may ignore that.

2) Would this emf (therefore electric field) induce another magnetic field, then the magnetic field induces an electric field on and on and on?

-Since we can infinitely differentiate a sinusoid, there should be an infinite succession of mutual induction.

3) If 2) is the case, how do we take that into consideration when analyzing a transformer?

∇×E = -dB/dt and e(ind) = -Nd[itex]\phi[/itex]/dt

Thank you!

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# Induced emf and flux in a transformer, conceptual question

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