RE: [TCML] Using unequal electrode spacing's, was Setting optimal phase angle of SRSG motor

[bturner@xxxxxxxx]

Not sure about taper-lock, still a possibility of rotor shift due to
rotational torque. I use a conventional hub with screws to the motor shaft
flat... A stepped flange with 4 threaded holes, the rotor(s) have a mating
bore and bolt holes. The flange provides accurate centering, and four S/S
10-32 cap screws work just fine. A conventional NEMA motor cradle provides
the phase angle adjustment.




> Thanks John,
> I can see what you are saying regarding the efficiency, rather than just
> the
> design and timing, allowing it to draw more power. An overall consequence
> is
> that the power factor shows an increase as well.
> Anyway I will still go ahead for next year, as it seems worth pursuing.
> Deciding on the timing to use will be the tricky part, and getting the
> phase
> correct with your phase controller will be interesting, as you will not be
> able to listen to the change of sound like a recent thread discussed.
> Richie mentions the difficulty of changing rotors to compare results, so
> with this in mind I intended to use taper lock type hubs. It should be
> possible then to swop in a couple of minutes in theory at least [grin]
>
> Regards
> Phil
>
> www.hvtesla.com
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Futuret
> Sent: 07 December 2010 22:48
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Using unequal electrode spacings, was Setting optimal
> phase angle of SRSG motor
>
> Phil,
>
> I think I had seen that, but I did my own work with unequal gap spacings
> before Richie did his work.  In my work I didn't actually calculate or
> simulate the effect, I just used my judgment for the spacings, then
> verified
> that I was getting equal sized bangs using a scope.
> Because I just estimated the proper spacings, my bang sizes were not
> exactly
> equal in amplitude but were quite close.
>
> Regarding improvement, it depends on how you look at it.  Yes the system
> will draw a lot of power and give longer sparks.  What's not clear to me
> is
> that efficiency is increased.  In other words does it give longer sparks
> for
> a given input power?  Certainly if a particular system tends to draw more
> power, it will tend to give longer sparks also.  From what I remember I
> didn't actually get longer sparks for a given input power, compared to a
> system using equal gap spacings for the same input power.  I was using a
> potential transformer to power the coil, so I was able to adjust the
> ballasting as needed.
> I didn't try the system using NST (current limited) transformers.
>
> I can't remember all the details of my tests, so I can't feel too
> confident
> in what I'm saying.  I just reported what I remember.
> I remember thinking at the time that the extra complexity didn't seem
> worth
> the effort.
>
> It might be a good idea to do your own experiments, and let us
> know what you find.
>
> Cheers,
> John
>
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: Phil Tuck <phil@xxxxxxxxxxx>
> To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
> Sent: Tue, Dec 7, 2010 5:29 pm
> Subject: RE: [TCML] Setting optimal phase angle of SRSG motor
>
>
> John,
>
> I presume you have seen this page many times of Richie's
>
> http://www.richieburnett.co.uk/offset.html
>
> I was seriously thinking of trying it for next year, but you have had no
>
> improvement your saying?
>
>
>
> Regards
>
> Phil
>
>
>
> www.hvtesla.com
>
>
>
>
>
> -----Original Message-----
>
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
>
> Of Futuret
>
> Sent: 07 December 2010 20:54
>
> To: tesla@xxxxxxxxxx
>
> Subject: Re: [TCML] Setting optimal phase angle of SRSG motor
>
>
> If I remember correctly, it's not necessary to use unequally spaced
>
> electrodes to get equal bang sizes at 200 bps.
>
> I've done various experiments with unequally spaced electrodes but I
> didn't
>
> generally obtain longer sparks for a given input power.
>
> John
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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