Re: [CAD_CAM_EDM_DRO] Power supply for servos

andrebarclay wrote:

>
> Hello All,
>
> Does anyone have any guidelines on sizing a power supply for 3 75V
> 10A servo motors?
>
> Thanks
> Andre Barclay

On the surface of it, 3*75*10 = 2250 Watts.

That would be continuous, but as Jon points out, those might be
surge ratings (short duty cycles, of which the motors are not capable
of running continuously), and perhaps 15 Amps (1125 Watts)
or less might be sufficient. You'll have to decide.

If I were to hazard a guess, 1KW would be good for a mill, but
1.5KW would be better if you are considering a router (the reason
being driving 2 axes hard is more common on a router, whereas on a
mill (even in 3D machining) usually only 1 axis is driven hard).

Keep in mind, the peak power which can be delivered is much much
higher for 2 reasons:
- a large capacitor stores lots of power
- certain transformers (including my toroids) have a surge capability
of 150+% for several minutes (to keep the draining cap charged).

Seasons Greetings
Doug Fortune
http://www.cncKITS.com home of the BEAST 1KW & 1.5KW power supply kits
back in stock approx January 9/2004






















































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