Re: Simple RSG Question

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

Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>

Hi Kent,

At 05:55 PM 3/15/2001 -0600, you wrote:
>
>  If an originally 1725RPM motor, which has had its rotor milled, now
>runs at 1800RPM, is it for sure salient pole and suitable for
>synchronous RSG operation?

If it was a typical induction motor and you didn't grind only three flats
in it or something, :-))  It just has to be right.  Salient pole and
prefect for SRSG use.

>Can too little or too much of the rotor be
>removed so that the motor runs at 1800RPM but not be suitable?  

Too little metal, and it will not have enough "syncing" torque to stay
locked.  To much, and the rotor's contribution to the motor's inductance
will be too small and the current to the motor will get too high and it
will overheat. 

>I have
>read that if too much is removed that the motor will have little
>torque and might overheat but is there other problems that might occur?

Not really, motors are pretty basic iron things.  You may cut through the
rotor's internal current paths (that aluminum pattern) or something.  

You may want to shim the play out of the rotor shaft a bit so it does not
move back and forth so much.  that may help in aligning the rotor to the
stationary electrodes without crashing.

http://hot-streamer-dot-com/TeslaCoils/Misc/sync_motor.txt

Cheers,

	Terry


>
>  Thanks.
>
>---
>Kent Vander Velden
>kent-at-iastate.edu
>