Re: [CAD_CAM_EDM_DRO] power supply question

Hi All
Someone commented that this is no problem if the power supplies are not
grounded on the output (INSIDE ) .

This is essential -if two are grounded you will probably short one of them
totally.
- if one is grounded you tie one side of
the suppl y to what you are driving to some possible un wanted voltage
above or below ground - result unpredictable, and almost certainly
unpleasant and expensive.

Jim Gregg

At 09:20 PM 7/14/00 -0400, you wrote:

>This question concerns hooking up power supplies in series for higher
>voltage. I have done that with a pair of 28V supplies and now have 56V.
>This was with 2 identical power supplies. My question is this: can you
>put another supply in series of a different voltage rating? Say, for
>instance, I wanted to get closer to the 75V max voltage of my drives.
>Could I use a 12V to 18V power supply in series with the 2 28V supplies?
>Or do you think that I should stay away from the max voltage running
>these Warner drives with NEMA 42 motors?
>Carey
>