Re: [CAD_CAM_EDM_DRO] VFD single phase 5hp

Callcbm wrote:

>ANy body now were to get a vfd for a 5hp using single phase. I found one for
>3hp single but not 5 hp single.
>willit hurt to use a 3hp on a 5 hp unit the lathe does and will not see
>using full power. Or would a Rotary converter be better.
>
>

If you don't run the motor at full power, or do that for more than a few
seconds at
a time, then you can run almost any VFD made after the 1980's on single
phase.
If you will be drawing rated power from the motor for extended periods
of time,
it is best to use a VFD with a higher power rating. So, you might use a
7.5 or even
10 Hp VFD with a 5 Hp motor. The only parts that know the difference
are the
rectifier and filter capacitors, and the larger VFD has a heavier-duty
set of these
components. I've been using a 1 Hp VFD from Magnetek on my 1 Hp Bridgeport
for 5 years now with no ill effects. I don't often draw full power from
the motor,
however, so I get away with it.

Jon