On Wed, Feb 15, 2006 at 07:03:41PM -0200, Gerhard Fiedler wrote:
> Peter Todd wrote:
> 
> > Total current draw averages about 22A-25A but can peak as high as about
> > 40A. Not that I am totally sure about those numbers, [...]
> 
> It's not quite clear what you mean by "peak", but it sounds as if that
> could be peaks of more than a few milliseconds. If that's the case, a power
> supply designed for 28 A may or may not help you. 

Ahh, I should be more clear. By peak, I mean that the highest amount of
current I can possibly get is 40A. This is achieved by turning all the
coils of the motors on. This is not peak in the sense of a momentary,
pulse, this is peak in terms of I can maintain a draw of that much
current under odd conditions. Not really a good use of the term peak
come to think of it.

> I'd try to buy one. Other than that, you can go simple linear (with big
> heat sinks), switched (which probably is not trivial for 40+ A), or linear
> with several parallel supplies that get switched on or off as the current
> requires. Or something else... :)

Probably the way to go. Another poster mentioned a switch-mode supply
from jameco that looks like it'd work, and comes with an impressive list
of things it does. Expensive though, I may just find a bigger, higher
voltage, transformer and go back to my first diode bridge. I just gotta
find a 8v, 50A transformer.

-- 
pete@petertodd.ca http://www.petertodd.ca
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