14 Dec
2004
14 Dec
'04
2:26 p.m.
>>>> "Tore" == Tore S Bekkedal
<Tore> writes:
Tore> On Mon, 2004-12-13 at 18:03 -0500,
Tore> 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.
Tore> Twisting this back on topic, the IBM 650 had a power
Tore> distribution that made something like 133Hz AC or even higher.
Similarly, CDC mainframes (6600 and friends) used 400 Hz power, from
motor-generator sets.
paul