14 Dec
2004
14 Dec
'04
12:42 p.m.
On Mon, 2004-12-13 at 18:03 -0500, shoppa_classiccmp(a)trailing-edge.com
wrote:
For not-so-heavy transformers, higher frequencies are
desirable, thus
the 400 Hz AC power on military aircraft.
The classic way of converting from AC at one frequency to another was
motor-generator sets, (And to convert AC to DC you used rotary
converters...) Modern implemenations use solid-state electronics.
Twisting this back on topic, the IBM 650 had a power distribution that
made something like 133Hz AC or even higher.
--
Tore S Bekkedal <toresbe(a)ifi.uio.no>