[TheForge] Re: Air hammer score

[Steve Smith]

You would need to have a transformer to get the 550V. I think there was a
thread about this very problem on rec.crafts.metalworking awhile back (a
year?). You might try searching there, but you will need a transformer. It
could be a single phase transformer or three phase depending on how you do the
rotary converter. If the rotary all runs on the 550V side, the transformer
could be single phase. If the rotary runs off of 220, then the transformer
would need to be 3 phase.

You should ask if the motor can be rewound for a lower voltage, but I suspect
not.

Keep your eyes open for a suitable idler motor. You can probably get away with
one the same HP (I assume you can start the hammer under no load). 1.5x to 2x
the HP is better.

Steve

Mike Spencer wrote:

> > I'll second what Shanell said--a rotary phase converter is pretty
> > easy to put together (if you feel competent to wire 220 circuits). I
> > will be happy to help with advice if you go this route; possibly
> > with parts if they suit whatever voltages you have.
>
> Well, Steve,  *that* is filed where I can find it.  I may be on your email
> doorstep in the fall.
>
> I see that I made a very misleading typo in my first post:
>
>    Careless-Me>  The 3HP motor was vandalized.
>
> It's a 3-PHASE (not 3-horsepower) motor, 60 Hz, 550V, 15 HP, 16.5 Amp,
> 900 no-load RPM, Type KT induction motor.             -----
>
> Um, how would I get 16.5 A at 550V from a normal 200A, 110/220V (or
> whatever it is) service?  (Assuming the motor turns out to be
> ressurectable.)
>
> - Mike
>
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