Re: Vexta, powermax, stepper voltage question??????

Hi,

I interpret the 65VDC rating as the maximum power supply voltage to
be used on a drive running the motor. This limit may be because of
motor winding insulation or it is a voltage that would bring the
motor case temperature to its rated limit. It certainly does not mean
you apply 65VDC to a winding to get the rated current.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "Tim Goldstein" <timg@k...> wrote:
> I have had a number of Vexta motors that were rated at 2 - 3 volts.
> Looking at a PacSci Powermax II sitting in front of me it has a volt
> rating on it that says 65 v, but from having run it at 24 v I would
have
> to venture a guess that the rating is done a different way than most
> other motors. On most motors the rated voltage is that at which you
> would get a current draw equal to the rated amperage if the supply
is
> just hooked directly to the motor without any current limiting.
Seems on
> the Powermax the rated voltage is more like the max voltage you
would
> use with a chopper drive limiting the current to the rated level. I
know
> this specific Powermax motor is just flying on a 24 v supply and an
API
> CMD-260 drive.
>
> So in summary, the Vexta appears to be a high inductance motor like
you
> would find in many copy machines. The Powermax is much more likely a
> very nive low inductance unit and basted upon the one I have I
would not
> exceed the 65 v supply level and it will probably run great on much
> lower voltage.
>
> Tim
> [Denver, CO]
>
>
> > -----Original Message-----
> > From: RC [mailto:asdf@c...]
> > Sent: Sunday, April 07, 2002 9:49 AM
> > To: CAD_CAM_EDM_DRO@y...
> > Subject: [CAD_CAM_EDM_DRO] Vexta, powermax, stepper voltage
> > question??????
> >
> >
> > Does anyone know why Vexta, powermax, ect. have such a high
> > rated voltage? For an example, a Vexta #268-23B is rated at
> > 24 volts and powermax are rated as high as 65 volts? Is this
> > the maximum or average voltages for these steppers? I know
> > one needs to supply at least 4 times the rated voltage, and
> > not more than 25 times the rated voltage, but that would be a
> > very expensive power supply!
> >
> > Thanks,
> > Russ
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
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