The problem with connecting 2 12V dc regulated power supplies in parallel, is
that the regulating circuits start interacting with eachother, each one trying
to regulate its own circuitry to the setpoint voltage. When the regulating
circuit of one sees the voltage of the other supply, this occurs. As stated, it
is impossible to adjust the two supplies to exactly the same voltage under
load. The solution (not the best) is to isolate the supplies with diodes so
they don't 'see' eachother. Diodes intoduce a small voltage drop however.
"R. Casey Case" <ka3ebe@comcast.net> wrote: Here is a question I have heard
varying opinion about, Can you connect two
12 volt power supplies together in parallel.
Say 1 power supply is 20 a amp and is a little week to carry a 100 watt
transmitter. And you have a 10 amp supply that you are not using. Can they
be connected in parallel, some of the question are can it be done?,
What is the total amperage available? What happens if the amp draw exceeds
20 amps? How will them be connected effect each other?
If you can connect 2 how about 3? > assume all power supplies are 12 Volts.
If you care to respond it would be appreciated
73
DE
Casey
Ka3ebe
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