Re: Transformers in parallel?
The tolerance bounds on 115v supplies are not proportional to the tolerance bounds on 230v supplies.
If the design of both transformers has been done thoroughly, there may well be a slight difference in turns ratio to accommodate this for when the split primary version is in one mode or the other.
Such a difference would leave a small emf driving current around the loop created by the paralleled primaries of the two transformers.
Transformers aren't simply voltage ratio = turns ratio, it is normal to have correction factors to make up for resistive losses and load current. On top of this are factors relating to output specifications and what conditions they apply over.
David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
|