Re: 3 Phase/VFD question

> from the motor? Do I divide 1792 by 60, and then multiply that by

360, or

> what?
>
> Bill

That would get you there , Bill. The label rating is for RPM at 60hz.
The formula for motor speed is "3600 divided by pairs of poles"
The 3600 is 60 cycles times 60 seconds and the pairs of poles is the
number of magnetic poles in a motor, north and south. A 1792 rpm
motor would have two "pairs" of poles whereas a 3600 RPM motor would
be a single pair of poles.
The frequnecy that the drive puts out will now replace the "60" in
the formula above to calculate RPM. But, be careful about running
too slow or too fast, cooling will be affected.
Most motors I"ve used don't like to be run much less than half speed.
Gary Shelton