dc servers

I've been thinking of better ways to provide uninteruptable power, and 
48vdc is proven nice but too expensive for commodity computing 
equipment and the wiring is more expensive than normal utility wiring 
due to the lower voltages.

I've read that most autoranging switching power supplies as used in 
computers can run off DC.

I'm thinking I could run three-phase AC into a diode network to get 
full-wave-bridge-rectifier really smooth output with really well 
phase balanced input. This would give me 120vdc.

I could wire in series a string of AGM UPS batteries that would float at 
120vdc, then I could distribute power to the servers from there. The 
capacity would only be limited by the basics such as the diode current 
capacity, battery output current, breakers, and wiring used.

Punch some holes in my crazy plan if you are qualified. Has anyone used 
such a system? This could handle a lot more load for less money than 
most big line-interactive UPSs and would have no cut-over delays like 
the 48v gear.

-- 
/* Jason Philbrook | Midcoast Internet Solutions - Wireless and DSL
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*/
-- 
Eat sushi frequently. - Avi
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