[chbot] Scrounging for big switch mode PSUs - clarifications

Synco Reynders synco.reynders at gmail.com
Fri Mar 8 03:11:19 GMT 2019

Hi Peter,
   I've built a 100V at 100A (12.5V x8 in series) supply you can borrow
briefly if you like to test your setup before purchasing.

On Fri, 8 Mar 2019 at 15:41, Peter Harris <petes.username at gmail.com> wrote:

> To clarify
> I am looking for mains powered DC supplies. The outputs must be floating
> to allow series connection.
> Re series connection and power.
> P = V x I so power rises in proportion to V
> A single supply delivering 20A at 50V yields 1000W
> 2 of these in series will deliver 20A at 100V or 2000W
> The 3 x 1000W 48V supplies in series will deliver 20.83A at 144V == 3kW
> Series connection of PSUs is fine provided their output isolation is
> sufficient to withstand the combined series voltage. Parallel connection is
> much more difficult but is not required here.
> "Caged" refers to the metalwork enclosing the electronics. Here are the
> unit's I'm considering
> https://www.aliexpress.com/item/Transformer-Switch-Mode-Power-Supply-DC-48V-3A-5A-7-5A-10A-15A-20A-150W-240W/32908080499.html?spm=a2g0s.13010208.99999999.265.1e3f3c002rOuom
> Thanks to all who have responded so far.
> I have been to Molten Media unfortunately they had nothing suitable.
> I had not considered a welder, I will do some research.
> I feel a talk at the next meeting coming on :)
>   P
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Synco Reynders
  m: +64 21 1825332
  e: synco.reynders at gmail.com
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