Re: Power supplies

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "wvickery2003"
<wvickery2003@y...> wrote:

>
> Thanks for the speedy replies. I haven't checked the Gecko site

out

> yet, but will do so when I have time a bit later.
>
> Could you please tell me roughly what kind of current I should be
> aiming for with a power supply? Is something like 14A too much?
>
> Warren

If your motors are 1 amp each, and 3 motors then you have 3 amps.

if they are rated for 6 volts, then you have 6 x 3 = 18 watts.

double that for the 2 phases. = 36 watts.

with a final 32 volts, and 36 watts, you need about 1 amp. at 32
volts. 36 watts divide by 32 volts = 1.05 amps

for the transformer, if it is 24 volts, then 36 watts divided by 24 =
1.5 amps. 36 watts divided by 24 = 1.5 amps.

so, to get 34 volts and 36 watts, you need a 24 volt/1.5 amp
transformer.

On something that small, there is no reason to try to under or
oversize. Round up if there are different transformers that are
close.

for a switching power supply, get at least 1 amp.

If you find something larger, that is fine. if you find a cheap 10
amp one, fine.

These are based on 1 amp / 6 volt motors. re-calculate based on your
actual motor specs.


the 2.5 amps, 4.5 volt motors are 11.25 watts each or 35 watts for 3,
double that for 70 watts.

70 watts at 34 volts = about 2 amps.
70 watts at 24 volts = about 3 amps.

2 amp switching power supply or 3 amp transformer.

(80,000 * 2 ) / 34 = about 5,000 uf capacitor if you go the
transformer route.

HTH dave