[Milsurplus] 24V power supply project question

[gl4d21a at juno.com]

Jay:

If those supplies include current limiting or constant current 
capabilitites, direct parallel connections should work.  There was a 
Hewlett Packard Application Note on paralleling regulated supplies 
published back when they were drawings on cave walls made with a lump 
of coal which discusses all the parameters.  Simplistically, it goes 
like this:  Simple paralleling will result in the one supply which 
has the highest output voltage becoming the primary, and as it 
reaches current limiting, the output voltage drops a few millivolts 
and the next starts to pick up part of the load, and so on through 
however many supplies there are.  Separating the sense connections 
from the individual outputs is required to make the supplies share 
the load equally, but you will have to find the App Note to get the 
details, as all my cave walls got scrubbed clean a few years ago.

In any event, parallelling supplies, even dissimilar ones requires no 
magic, just a little understanding of Ohm's and Kirchoff's laws.

73,
George
W5VPQ


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