In transformer core flux depends on voltage whereas leakage flux depends on current?

Answer 1

In a Transformer, Core flux is the difference of primary flux and Secondary flux which are opposite to each other in direction. There difference is equal to the no load flux at all loads.

So, some of primary flux passes through the core and remaining becomes leakage flux (Because Secondary flux forces it to get out of the core). Same is the case with Secondary flux.

Now, flux is directly proportional to Voltage and Current.

When Current increases due to increased load (and voltage remains same):

Then both primary and secondary flux increase. Because both of them increase, so there difference remains same. And all remaining flux is forced out. Hence leakage flux increases with current, but Core flux remains constant.

When Primary Voltage is increased:

Then only primary flux increases. So difference of this new increased primary flux and previous same secondary flux increases. Hence Core flux increases with voltage, But leakage flux does not.

That's how In transformer core flux depends on voltage whereas leakage flux depends on current.

Answer 2

In a transformer, the core flux is primarily influenced by the voltage applied to the primary winding, based on Faraday's law of electromagnetic induction. On the other hand, the leakage flux is related to the current flowing through the windings and is caused by the imperfect magnetic coupling between the primary and secondary windings. Balancing these two flux components is important for the efficient operation of the transformer.