Re: [tlug] OT - Shutdown day

[Godwin Stewart <gstewart@example.com>]

On Fri, 18 Apr 2008 08:51:35 -0500, "Daniel A. Ramaley"
<daniel.ramaley@example.com> wrote:

> How efficient are DC->DC conversions compared to AC->DC?

Probably pretty close given that an AC->DC converter is basically a DC->DC
converter with a bridge rectifier and a big capacitor on the input. The
efficiency of the rectifier is very high.

Of course, it all depends whether you're converting upwards or downwards.
Downwards is more efficient than upwards because there's comparatively
little current in the primary circuits, therefore little loss to Joule
effect before the energy even gets into the secondary.

-- 
G. Stewart - gstewart@example.com

Frisbeetarianism, n.:
        The belief that when you die, your soul goes up on the roof and
gets stuck.

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