R
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Guest
Hello,
I want to build a flyback transformer (ETD core) with a single output (12V/10A rated).
As I only have some 0.7mm magnetic wire, I intend to make few identical (rather having the same number of turns) interleaved edge-to-edge windings for both primary and secondary (the designed turns ratio is 1:1).
Obviously, every layer will have a slighty larger diameter (although the same number of turns) thus its resitance will be slighty different. May I also consider that the flux density will decrease, too?
The question is: may I consider those windings "identical" enough to put them in parallel or do I have to add some small series resistors to balance those voltages?
Of course, I could try to make some sort of litz wire using 4-5 strings in parallel but it's much easier to wind a single wire (beside having slighty more available space and stronger magnetic coupling because of interleaving layers).
I want to build a flyback transformer (ETD core) with a single output (12V/10A rated).
As I only have some 0.7mm magnetic wire, I intend to make few identical (rather having the same number of turns) interleaved edge-to-edge windings for both primary and secondary (the designed turns ratio is 1:1).
Obviously, every layer will have a slighty larger diameter (although the same number of turns) thus its resitance will be slighty different. May I also consider that the flux density will decrease, too?
The question is: may I consider those windings "identical" enough to put them in parallel or do I have to add some small series resistors to balance those voltages?
Of course, I could try to make some sort of litz wire using 4-5 strings in parallel but it's much easier to wind a single wire (beside having slighty more available space and stronger magnetic coupling because of interleaving layers).