[Milsurplus] 3 Phase Power

[Dave Maples]

John: You might want to look at this thing more closely.  If it has three
really separate converters (not uncommon), you should be able to connect the
three of them in parallel to operate from a single-phase line.

Dave WB4FUR
  -----Original Message-----
  From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net]On Behalf Of jwatkins
  Sent: Friday, May 11, 2007 12:04 AM
  To: Milsurplus at mailman.qth.net; armyradios at yahoogroups.com
  Subject: [Milsurplus] 3 Phase Power


  Hi All,



  Just found out some interesting things about power supplies.  Bought an
EMI (Lambda) supply that is adjustable from 0 to 30 volts and puts out 165
amps over the complete range.  Fully adjustable for current/voltage/over
current, etc.  It is a 5Kw unit.  All the 28 volts I will ever need.
PROBLEM at least I thought it was a problem, it is a 3 phase unit.  I was
looking at making a static converter, a rotary converter, all kinds of
converters.  Would have been a fun project.  Finally asked some one that
actually works and repairs these units what to do.  His solution is just
hook my 220v to Phase a and Phase b.  The unit will only put out about 3 Kw,
but still lots more than I need,  This is a switcher, and has 3 bridges that
feed into one line, so I have one bridge that is not used.  I don't think
this will work on units that have a Delta or Wye transformer, but apparently
for the EMI / Lambda switchers it is fine.  Price was $80, I suspect because
no one wanted a 3 phase unit.  Google is a great thing.



  Cheers,



  John  WD5ENU/A45XV
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