EVDL Administrator via EV wrote:
On 30 Jul 2020 at 10:58, Robert Bruninga via EV wrote:
no mention of 240 VAC two phase?
I'm not an EE, but I don't think that such a thing exists anywhere, at least
not as commercial power. The US does have 240v split phase, but that's
single phase.
I don't think 2-phase power is distributed in the US; but it is still
widely used to power motors. The "permanent split capacitor" motor in
your furnace, A/C or refrigerator is in fact a 2-phase motor, where the
second phase is produced by a capacitor in series with the AC line. The
current in a capacitor is 90 deg. phase-shifted from its voltage, which
provides the second phase.
Such motors are smaller, lighter, cheaper, more efficient, and smoother
than single-phase motors. It's a bit like comparing a 1-cylinder to a
2-cylinder ICE engine; the latter is much better.
Lee Hart
--
A designer knows he has achieved perfection not when there is
nothing left to add, but when there is nothing left to take away.
-- Antoine de Saint Exupery
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
