Re: [CAD_CAM_EDM_DRO] Transformer True or False?

In a message dated 18-Dec-00 09:00:06 Central Standard Time,
speff@... writes:

> Basically, yes.
>
> You might want to slightly derate it because the wire size on the primary
>

I am not a "trained professional transformer engineer", but I have made
dozens of them (one-off, prototypes, etc., not "production-runs"!), and the
"copper and iron losses" (wire and core) total 5% on, say, 50 to 1000 VA
transformers. Never made any larger than 1KVA, but I suspect the % loss goes
very slowly down, as you go above aboutr 1 KVA size.

Yes, but there is usually an "add-on %" to the secondary winding-count to
counteract voltage-drop under load, so, "any" transformer is NOT a 1:1 (or
whatever ratio) relationship, but probably a 1:1.04, etc. So, if you had,
say, a 120-240 power-transformer, and hooked it up to 240 feeding into the
"secondary", you would probably get maybe 110 V out the "primary", not 120!
For such, one must do some fiddling, or "roll your own"! Wanna link for that?

<A HREF="http://members.tripod.com/~schematics/xform/xformer1.htm">Roll Your Own Power-Transformers!</A>


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