Transformer law

giveing alternet current to the primary part of transformer we will have an induce fulx in the core and then the flux will goes through the core up to the secondary part of the transformer ...... this flux cuts the wire on the secondary part in order to induce the voltage as in generator action.

IMO You have it right first time.

It is the basic Faradays laws of Electromagnetic induction principle happening inside the transformer.

1 . When a current carrying conductor is placed in a magnetic field an emf is induced in the secondary winding which drives a current into it . The magnitude of induced current depends on the voltage and number of turns of the winding.

Here is the link to the quick school.

Good luck, Maximo

Following the link in "3", I was surprised that neither the 'quick_school' nor a quick Google search brought up anything relative to the Paraformer Transformer. I read about these decades ago (in my electrical apparatus service-shop days). A couple of points on these were low efficiency (primarys always drawing 100% regardless of load), BUT the output being totally free of any noise on the input side (i.e., true sine-wave only).

A bit fuzzy on the rest at this point, but as I recall there is no "shared" flux between the windings, and they were described as acting (in-usage) more like a resonant tank circuit than a transformer.

Anybody else have the latest update on this less-than-ordinary item...?

Sounds like a ferroresonant transformer, the basis of most older power conditioners and constant current power sources.

Thanks for that... (I always remembered the term "paraformer"... in fact, have it scribbled in a side-bar note in an old text). Looking-up "ferroresonant...", the resulting Wiki article on:

http://en.wikipedia.org/wiki/Voltage_regulator

fills-in the information that I had forgotten. I'm certain that you hit the proverbial nail on the head for me. Je vous remercier!