electro-Physics: 17.3409 volts

From: William Donzelli <aw288_at_osfn.org>
Date: Tue Dec 14 17:41:46 2004

> Reminds me. The CDC Cyber 960 from http://www.cray-cyber.org/ runs at
> 400 Hz. The higher frequency allows smaller transformers.

I think the intent was to reduce the ripple, rather than reduce the
weight. CDC wasn't afraid of a few more pounds.

> The 400 Hz three phase current is generated by a motor-generator. The
> rotating mass of this machine is enough to keep the Cyber running for
> some seconds. (Power consumption of the Cyber at minimal configuration
> is around 20 kW.) Enough to start a big diesel generator in case of a
> power outage.

I doubt you could start a big diesel that fast, reliably.

The inertia would, however, protect against little dips and burps in the
power, when the utilities are fooling around with the grid.

William Donzelli
Received on Tue Dec 14 2004 - 17:41:46 GMT

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