Re: cheap 200A AC to DC power supply?
- From: Jan Panteltje <pNaonStpealmtje@xxxxxxxxx>
- Date: Sat, 18 Nov 2006 13:30:06 GMT
On a sunny day (17 Nov 2006 20:48:47 -0800) it happened acannell@xxxxxxx wrote
in <1163825327.923538.233730@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:
I want to power 10 thermoelectric heat pumps at once from wall power.
(120VAC 60Hz). Ripple is somewhat important for these, but precise
voltage and current regulation is not. Each heat pump draws 17A at full
power, plus I need some extra current for fans, pumps, etc.. The heat
pumps need about 17V at full power. So I need an AC to DC power supply
which takes 120VAC 60Hz and outputs 17V at up to 200A. Could someone
point me in the right direction here? It needs to cost less than $200.
Ripple hurts these heat pumps but if its very slow I dont think it will
matter, even if its a couple volts. Current can vary up to say an amp.
Can you put the pumps in series?
If so rectify 120V AC gives you 169.7 V DC, 10 x 17V pumps in series at
17A total, riplle depends on the cap size.
4 20A 400V diodes, one huge electrolytic.
If you cannot put the pumps in series you better use separate power supplies.
If you can, modify some PC power supplies, so these give 17V, 10A (170VA).
(put 12V in series with the 5V).
That will be a cheap solution, PC power with 12V > 17A can be found for
less then 50$ each, discount for 10 ;-)
But your data is confusing, at one point you sat 17A, then 10A.
So check again what you have.
.
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