[TAC] Astron power supplies in parallel

[mzedan at juno.com]

Hi Ian:

Just running your scheme in my mind, I believe that Kirchoff's law applies.  That is, if the voltages are not exactly equal, the higher V supply will tend to push reverse current into the lower V supply.

When you're drawing the high current in your rig, this might not mean anything.  Actually, it may not mean anything in any case.

The solution:  I haven't looked in the handbooks (will later), but the circuitry that's used in analog power supplies that have parallel power transistor outputs is probably a clue.  They throw in that stuff to take care of voltage inequalities.  Using isolation diodes, as in dual battery vehicles and such, would require some heavy duty semiconductors, but would, definitely, take cure of the Kirchoff issue.

Let me know if I'm on the right track.

CU,

MikeZ

-- "Ian Hill K8MM" <k8mm at arrl.net> wrote:
Does anyone know if I have had to do anything special to connect my astron power supplies in parallel? I'm going to connect a RS-50 and a RS-20 in parallel to feed the DC power buss for my station.

Ian K8MM
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