Re: [CAD_CAM_EDM_DRO] Where to buy transformers?

PLITRON - audio transformers - toroidal transformers - toroids - output
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----- Original Message -----
From: "ds_hutchins" <hutchins@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, August 05, 2002 4:10 PM
Subject: [CAD_CAM_EDM_DRO] Where to buy transformers?


>
> I'm thinking of building my own power supply, and I need to find a
> transformer for a reasonable price. While there's been a lot of posts
> on the list that discuss transformer types and/or sizes, I couldn't
> find any links to places that actually -sell- them at reasonable
> prices. The standard online electronics houses (e.g. mouser &
> digi-key) don't seem to carry large power transformers. I'm looking
> for something in the 500VA - 1000VA range. Toroidal would be nice, but
> I may go with the "normal" kind for price reasons.
>
> As to size... I just purchased 3 DC motors that run at 40V nominal,
> 60V max, with a peak current draw of 14A/each. The guy I bought them
> from recommended that I run them at 48V for CNC use. I know that I
> won't ever run all three at peak current, but would a 10A (500VA)
> transformer actually be sufficient, or should I shell out the $$$ for
> a 20A unit?
>
> Also, I've seen several posts that say I should multiply the AC
> voltage by 1.41 to get the DC rectified voltage. In my electronics
> books, however, it says that most AC voltages (such as the 110V
> household voltage) are already specified in rms form. When I'm buying
> a transformer, do I get a 48V secondary, or a 34V secondary?
>
> Thanks!
>
> - DeLesley Hutchins
>
>
>
>
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