Re: [CAD_CAM_EDM_DRO] power supplies form those 24v transformers

Marv,

I think several little transformers would tend to stay cool
pretty well due to the increased surface area/volume.
But I have read that winding hot spots are usually the thing that
thermally limits them if they are typically designed.

But if that voltage is too high it's a no go.

If it turns out to be ok I can draw up a schematic and post
on my site if someone hasn't done that already.

This is a big supply and should be enclosed in a vented box.
It must have some turn on inrush control as well.
It's practically an arc welder. Make a mistake and it will be!

Les
Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.alltel.net/~leswatts/wattsfurniturewp.html
engineering page:
http://www.alltel.net/~leswatts/shop.html
Surplus cnc for sale:
http://www.alltel.net/~leswatts/forsale.html

----- Original Message -----
From: "Marv Frankel" <dcdziner@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, January 19, 2003 1:03 PM
Subject: Re: [CAD_CAM_EDM_DRO] power supplies form those 24v transformers


> Les,
> I've been following this thread with interest, and asked the
> originator for a schematic, using two of the 24V transformers. I also
looked
> into the www.mpja.com web site, and saw a 48V @ 10A, and a 75V @ 6.6A
> available, but at a much greater cost. Would mounting 4 or 6 of the 24V
> units in one case require a fair amount of ventilation, or wouldn't there
be
> that much heat generated?
>
> Marv Frankel
> Los Angeles
>