Electronics > Beginners

Old DC current measuring device

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Kleinstein:
There is a tendency for the flux to go towards 0, but not very strong. The more important point is that the flux can not go higher than a saturation value. So when there is already some DC flux, the AC part will eventually high that limit and than there will be a significant AC current.

There will never be a true zero at the secondary, as even with rather soft cores (which should be the right choice) there is some magnetizing current, though not much.  So there would be some offset.

One could probably simulate such a circuit in something like LTspice.  There are provisions to also simulate nonlinear magnetic cores - however I don't know how.

iMo:
..a lot of magnetic core simul stuff in Bordodynov library..

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