Re: [CAD_CAM_EDM_DRO] How to design the power supply for steppers ???

Pavel Korensky wrote:

> At 02:57 PM 5/27/01 -0400, you wrote:
> >In a message dated 5/27/01 12:41:00 PM Mountain Daylight Time,
> pavelk@...
> >writes:
> >
> ><<
> > 48/SQRT(2) = 34 V - total output voltage of the transformer
> > >>
> >Better add a little in some for the voltage drop across both legs of the
> >bridge rectifier.
> >bill
>
> Thx. I ommited to mention that those are only rough calculations. The main
> questions are, if the mentioned motor parameters (or catalogue parameters
> of similar drivers like 48V/5A) are per motor or per winding. And also, if
> it is really necessary to multiply the current of each channel by number of
> channels.
> I am trying to limit the power supply as much as possible (without
> compromising the torque of course). Those 1000W transformers are big (even
> in toroid form) and also the total power consumption is quite big. For
> example, in my house, I have the 240V/10A circuit breakers...

The rated current in steppers is normally PER WINDING. But, the chopping
nature of these drivers greatly reduces idling current, approximately by the ratio
of voltage applied to the winding divided by P.S. Voltage, and reduces running
current also, but in a less easily predicted way. So, the 1500 W power supply is
most likely vastly excessive.

Jon