16 May
2006
16 May
'06
6:28 p.m.
If you are serious, I have a 3 phase UPS.
Paul
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Patrick Finnegan
Sent: Tuesday, May 16, 2006 2:31 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: VCF East 3 - From the IBMcollectables.com viewpoint
On Tuesday 16 May 2006 13:59, Sridhar Ayengar wrote:
Well, the "easy" way to do it, would be to use a rectifier and capacitor
network to convert to DC, and some high current/voltage chopper
transistors and an output filter (maybe an isolating transformer, or
step up/down transformer depending on what you wanted for an output
voltage) - essentially on on-line 3-phase UPS without any batteries.
Of course, you could add a battery bank in the middle to give it some
UPS functionality. :)
Pat
--
Purdue University Research Computing --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
He went to a
solid state version, because the motorized version
would not work with the motors in some new equipment he
wanted to use.
How do they work? One of the ones I was trying out used a full-time
capacitor network, but it cost waay too much and didn't have the kind
of load capacity I was looking for. The PF was pretty good, though.