The subject of "compensated" transformers, where the turns ratio is 'adjusted" to make up for losses has come up from time to time.... usually when a question about running a transformer in reverse is concerned.
We found some..... Hammond Power Solutions "Spartan" series are definitely compensated..... we found that they came up 5% to 7% short when run in reverse..... we wanted a 120 to 416v and it came up around 390 VAC output..... The turns ratio is a bit short, and we could not use them where we wanted. This was in a few hundred VA unit, 250 or 500 VA IIRC.
Naturally, if run FROM 416V, it will come out a bit higher than 120V at no load, and drop presumably to 120V, under load.
So, yes, they DO exist.
We found some..... Hammond Power Solutions "Spartan" series are definitely compensated..... we found that they came up 5% to 7% short when run in reverse..... we wanted a 120 to 416v and it came up around 390 VAC output..... The turns ratio is a bit short, and we could not use them where we wanted. This was in a few hundred VA unit, 250 or 500 VA IIRC.
Naturally, if run FROM 416V, it will come out a bit higher than 120V at no load, and drop presumably to 120V, under load.
So, yes, they DO exist.
