In Reply to: Autoformers: Need Technical Explanation.... posted by Dr. Toobz on September 15, 2009 at 16:53:05:
I'm certainly no expert but since none have answered yet, I'll take a stab at it.
Because the secondary is connected "electrically" and inductively, the voltages are combined. So if your running the primary off of 100v and the turns ratio is 1:4 you either end up with 140v or 60v depending on if the secondary is wired in phase or 180 degrees out of phase. Decreasing the gain comes in handy in those power adapters for use in other countries that have different standards.
One of the big drawbacks with having the primary and secondary wired together is it will not reduce hum as in a inductively connected transformer.
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Follow Ups
- RE: Autoformers: Need Technical Explanation.... - ironbut 09:54:39 09/16/09 (0)