Re: [CAD_CAM_EDM_DRO] Re: Gecko wiring question

The transformer is rated at 24VAC _at_ 10 amp load. With a 10A load, the
output should sag a little, getting it closer to spec.

Also, the bridge rectifier only charges the caps at the peaks of the sine
waves. As soon as you start discharging the caps a bit, the voltage will
drop, because the caps will be discharging most of the time, and only
charging when the peaks of the sine wave are greater in voltage than what
is on the caps. Kinda hard to explain; easier to draw a picture. If you
looked at the loaded output of the power supply, it will look like a saw
tooth. A (somewhat) linear drop in voltage as the cap discharges, and not
a linear charge, but a shape that matches the peak of the sine wave as it
charges. Mariss posted a *.pdf file to the files section, with a schematic
showing how to automatically discharge the caps when power is removed. He
drew a nice picture showing what I'm trying to explain. If you put a 10W
110VAC light bulb on the output, the voltage might drop, say, 3V. Put a
second 10W bulb on the output, and it might only drop 0.1V, etc.

I'd like to hear what Mariss says about driving the geckos with this setup,
since he is the last word (warrantee wise) :-)

Just a FYI...

- Steven Ciciora

At 09:34 PM 1/17/03 -0000, you wrote:

>Well I started with 2 24V 10 amp transformers runn in series to give
>me 48 volts. but these are rated at 110 volts.
>The power as measured in my shop is 122 volts. So I ended up with
>29.5 volts per transformer or 58.7 (as measured) in series.