Re: [CAD_CAM_EDM_DRO] Re: Variable frequency drive question

Aggreed with the exception that some/all VFDs have a mim motor impedance
limit below which unsatificatory operation or damage to the VFD can result.

The work around is to add inductors in the motor leads which efectivly
derates the motor.

I also understand the difference between factory design engineering and
field engineering <GRIN>
Hugh

> Check the VFD's current rating. you can run a motor 'up to' that
> rating.
>
> I have used many, many 20hp drives to run 30hp motors up to about 80%
> of the rating of the DRIVE (not the motor) and then for full speed,
> switched over to directly to line voltage. Think of it as a soft
> start with low speed capablities.
>