Re: Rotary gap nearly done...

To: tesla-at-pupman-dot-com
Subject: Re: Rotary gap nearly done...
From: open_minded <bturner-at-apc-dot-net>
Date: Sun, 20 Oct 1996 00:38:17 -0700
Tesla List wrote:
> 
> >From chip-at-poodle.pupman-dot-comSat Oct 19 21:30:48 1996
> Date: Sat, 19 Oct 1996 21:21:12 -0600 (MDT)
> From: Chip Atkinson <chip-at-poodle.pupman-dot-com>
> To: Tesla List <tesla-at-poodle.pupman-dot-com>
> Subject: Rotary gap nearly done...
> 
> Greetings,
> 
> First, we now have over 250 subscribers!  What have I gotten myself into? :-)
> 

<snip>

> 
> I reversed the pulleys from the blower and motor, so the RPM of the
> rotary gap is about 3450 (~2*1750).  Unfortunately, this arrangement is
> hard on the motor as it takes several seconds for the whole thing to come
> up to speed.  During that time, the starting windings are energized and
> the motor gets pretty warm.  The other problem is that the motor, being
> induction, is pretty much a fixed speed.
> 
> Since I have 12 studs on the rotor, I get about 690 breaks per second
> with this arrangement.  The rotor is about 12" in diameter, so the dwell
> time is "short".  The question that I have is "Is the 690 bps too high
> for starting out?"  I ordered one of those Carter motors from C&H Sales,
> but I'm wondering if It would be OK to start using the gap as is, or will
> I likely blow a cap?
> 

<snip>

> 
> Chip
> 


Chip -

 Why not go to a synchronous gap? Use a synchronous drive belt (cogged)
to transfer the energy to your rotor.


 BTW - Got the mod's finished on my new GE 3450 RMP motor. Seems to
lock into the poles just peachy. I plan to finish up the construction
of a removable (I transport the coil system all over the place for
demonstrations and such) strike rail, and hope to fire up the "new and
improved" coil system within a week or so.

- Brent