6 Feb
2011
6 Feb
'11
4:58 p.m.
All,
This is starting to get further off topic as this is more a few years
into the future. I was reading the IEEE Spectrum for Feb and they have
a couple of pages about a move to 380V DC distribution for data
centres with a view to make it suitable for domestic use.
Simon
--
------------------------------------------------------------------------
"Well, an engineer is not concerned with the truth; that is left to
philosophers and theologians: the prime concern of an engineer is
the utility of the final product."
Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh
6 Feb
6 Feb
5:11 p.m.
On 7 Feb 2011 at 8:58, Simon Fryer wrote:
This is starting to get further off topic as this is
more a few years
into the future. I was reading the IEEE Spectrum for Feb and they have
a couple of pages about a move to 380V DC distribution for data
centres with a view to make it suitable for domestic use.
What with LED lighting for general illumination looming in the
future, a move to DC for lighting makes sense. But I see that more
as power supply(-ies) operating off the AC line. But a switching
supply shouldn't care if it's running from DC or AC.
If we move to plug-in electrics, DC distribution might make some
sense if it's the right voltage for use by autos. I suspect though,
that it's a long way off.
Probably about as far off as 40Mb/sec broadband is for my locale.
--Chuck
7 Feb
7 Feb
12:57 p.m.
as power supply(-ies) operating off the AC line. But
a switching
supply shouldn't care if it's running from DC or AC.
It won't bother the powers-that-be, but to make this marginally on-topic
for classiccmp, a fair number of older SMPSUs do require AC mains inputs.
They have a mains frequency transfomer to provide the startup supply (and
sometimes the running supply for the SMPSU control circuitry). The VT100
is one such, so is the HP7245 pritner/plotter.
of course if we ever do get DC maoins, classiccmpers are going to have
problem. There are a lot of linear PSUs in our machines, AC motors in
disk drives, fans, etc and so on. I suspect we'll have to make DC->AC
converters...
-tony
6 Feb
6 Feb
5:12 p.m.
On Sun, Feb 6, 2011 at 7:58 PM, Simon Fryer <fryers at gmail.com> wrote:
All,
This is starting to get further off topic as this is more a few years
into the future. I was reading the IEEE Spectrum for Feb and they have
a couple of pages about a move to 380V DC distribution for data
centres with a view to make it suitable for domestic use.
I've been hearing about 380VDC for data centers for years now - I have
yet to work in a place that is even considering it as a long-term
projection (I'm not saying that nobody is using it, but it hasn't
trickled down to spaces that cost mere millions that I've seen).
-ethan
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