Does low transformer coupling cause increased core flux?

Thread Starter


Joined Sep 20, 2005
I am wondering about how does leakage inductance contribute to total core flux?
I think that if I understand correctly, then the flux caused by magnetizing inductance would be the same as in a perfect transformer, but what effect does the reflected current from the secondary cause?

It seems to me that the reflected current through Ll1 would add to the core flux and increase it in a hotspot where the leakage lines go through the core.
But on the other hand, the leakage loop goes through air around the core, so wouldn´t the vast difference between μ0 and μ and long length of gap cause the reluctance of the loop to be high and therefore the additional flux to be low (from equations in flux5.png)?
flux1.PNG flux2.PNG flux5.PNG