On 07/10/11 20:30, John Lofgren wrote:
fortunately, everything in the "lab"(basement) is on UPSs so in theory
the input voltages to the equipment should be pretty constant and I
was already planning on using a linear supply.
Be careful, there. Most consumer type UPSs are not line regulators. When
there is sufficiently
high line voltage they are completely out of the circuit and the line voltage
is passed through to
the output unaffected. They're usually not designed for continuous operation
of the inverter
circuit. There was a more in-depth discussion of this a while back in a thread
about running
50 / 60 Hz clocks from a locked frequency source.
Indeed. Even large UPSes usually run in bypass mode to save power.
Actually running the DC to AC conversion isn't used much these days.
It's much more difficult to kill my argument that most modern equipment
run on switchers, which causes much less variation on power dissapation
with supply voltage, but I was careful to talk about linear supplies...
Cheers,
Magnus
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