Re: Hi frequency inverters and spindles

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:

>
>
> ddgman2001 wrote:
>
> >If possible I'd like to piece together a Colombo or Perske system

of

> >spindle and high frequency inverter.
> >
> >Is this a fairly straightforward request or are there intricacies
> >involved beyond matching HP rating, voltage and phase?
> >
> >Am I better off ordering all from one manufacturer or supplier?
> >
> >
> Yes, until you get to the price part. better be sitting down.
>
> I have a Westwind air bearing drilling spindle, which is mercifully
> 3-phase, and I have gotten it to run on a standard VFD. I had to

add

> inductors to the output, between VFD and motor, because the motor
> is such a low inductance. My VFD only goes up to 400 Hz, so I am
> limited to 24,000 RPM. Some VFDs, such as AC Tech, have options
> allowing them to run up to 1000 Hz.
>

>
> Jon

I picked up the 7.5 HP Colombo spindle, now I'm on the hunt for an
inverter. There aren't many 7.5 HP ones available, would there be
any problem with using an inverter rated for 10 HP instead? Assuming
the phase, Volts and freq. are all correct.