Re: better sync motor mods?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mike Novak by way of Terry Fritz <twftesla-at-uswest-dot-net>" <acmnovak-at-email.msn-dot-com>

John, Finn, etc....
Well, I just couldn't leave this one alone...
At school I have access to a big old milling machine which has provided me
with 4 successful motor modifications thus far.  Also, I have a pair of nice
little 1/15 HP General Electric motors which both run at 3450 RPM (right
now). I've modified a similar one on the milling machine, and it DID cut
into the current bars (as did all of my past mods). I used the gereal rule
for determining width (1/2 dia for 3600 RPM; 1/3 dia for 1800 RPM) on all of
the mods also. So, I was thinking I could mod both of my matching motors,
one with the standard method, and one with the V cut method, and compare the
results.
A few questions before I ruin a perfectly good motor though...
How fast is the motor you've looked at?
How wide were the V cut groves in respect to the rotor diameter?
How deep are the V cuts?

With a little luck, I think I can dig up enough time to do these mods in the
midst of finals next week... The really cool thing is, it only takes me
about 10 minutes to modify a motor now, and I don't even need to test it
after i've cut the flats to the proper width!
I can't imagine life without full access to a big bad metals shop!!!

Safe coiling!

-Mike Novak


> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<FutureT-at-aol-dot-com>
>
> In a message dated 1/9/01 9:14:29 PM Eastern Standard Time,
tesla-at-pupman-dot-com
> writes:
>
> > John, all
> >
> >  Very interesting observation, I have often been dreaming that it
_might_
> >  be better in some way, to make a narrow and deep slot along the rotor,
> >  rather than the usual flat.  The reason that I have not tried it yet is
> >  the one you mention: the risk of completely disrupting the current bars
> >  in the rotor.
>
> Finn,
>
> If you do cut through some current bars, I don't think it will ruin
> the motor.  Rather it will simply make the groove apear electrically
> as a wider groove than it is because of the angle of the bars.  But
> the motor should still work fine.  It would just affect the torque, etc,
> but to a minor degree.
>
> >
> >  John, could you take a picture of that motor rotor, it would be
> >  interesting to see the proportions of the whole thing.
>
> I don't know if and when I can get to that.... we'll see.
>
> John Freau
>
> >
> >
> >  Cheers, Finn Hammer
> >
>
>
>
>