Re: Power supply for Servos

These servo suppplys are a little hard to nail down. A couple of
weeks ago i tried to get a formula for making one. Both Mariss and
Jon Elson gave me advice for building a supply. If i understood
them. The straight forward approach means you need the wattage
rating of the servo. Second best is the constant current spec and
maybe Ke constant. Third worst is the voltage and current rating like
you gave.

Do you have any other specs on your motors...



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

>
> Hi all,
>
> I am uncertain about sizing the power supply for servos.
>
> 2 servo motors, 110v, 11.6A
>
> If I use a 55V transformer of 1kva, that would be roughly 1,000
> watts.
>
> Once converted to DC, (55-1.2=53.8) x 1.414 = 76 volts.
> 1,000 watts at 76 volts = 13 amps.
>
> For steppers, we talk about using 60% of the rating for the power
> supply, but I have not seen any references regarding servos.
>
> Would I use 76 volts and 11.6 amps as the rating for the servo ? or
> use 60%
>
> I hate to think that by the time I get everything comple I will
> probably still not have all the answers….
>
> Amy I cose on this ?
>
> Dave