Ideal transformers pass DC

378

09:05:39

This simple simulation shows that ideal transformers "pass" DC voltage across. Just run the simulation, close the switch and observe the output voltage. The reason why this wouldnt work infinetley (steady state) is that
1. Saturation current of primary side
2. You have to store infinite energy in the transformer magnetic field (Correlates to 1.)

published 2 years ago

giomix

2 years ago

In your experiment what trasformer see is not a DC but a variable current from 0 to Vcc at a speed very high. But not DC. If you start your experiment using switch already close, this is DC and in fact you will have 0 Volt at the output.

crasht1me

2 years ago

There is one problem with your argument - when you have DC source , your current waveform could be anything ( take as an example current of buck converter) There are many articles which explain this phenomena. Moreover, the DC operating point of this circuit is wrong(starting with switch closed) as you would expect short circuit (inductor)

crasht1me

2 years ago

So DC operating point does not exist for this circuit as it never settles

giomix

2 years ago

Inductors react (against) to variable currents. Yes DC is not the necessarily a constant current.

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