Re: Help in calculations (fwd)

To: Tesla List <tesla-at-poodle.pupman-dot-com>
Subject: Re: Help in calculations (fwd)
From: root <root-at-poodle.pupman-dot-com>
Date: Tue, 30 Apr 1996 22:06:58 -0600 (MDT)


---------- Forwarded message ----------
Date: Tue, 30 Apr 96 11:09:00 PDT
From: Richard Hull <RICHARDH-at-whitlock-dot-com>
To: bin <bin-at-poodle.pupman-dot-com>
Subject: Re: Help in calculations


Charles,

     I am back after two weeks out of the office and will mention that the 
rotary in an asynchronous mode, if run at a sufficient break rate 600-800 
BPS will not "get out of phase" as there are more than enough "presentations 
of the points to cover the entire sinewave of the 60hz power well.

A lot of Tesla coil buffs don't realize that their non-synchronous rotary 
gaps with 800 presentations per second are not usuually working beyond about 
400 BPS or even less!

The optimum speed is found by sped controling the motor.  This is a must for 
non-synchronous gaps if the best control is to be had over the systems 
overall operation..


Richard Hull, TCBOR
 ----------
From: bin
To: Tesla-list-subscribers
Subject: Re: Help in calculations
Date: Wednesday, April 24, 1996 8:38PM

>From 74040.3317-at-CompuServe.COMWed Apr 24 20:26:25 1996
Date: 24 Apr 96 13:36:36 EDT
From: Charles Brush <74040.3317-at-CompuServe.COM>
To: tesla-at-grendel.objinc-dot-com
Subject: Re: Help in calculations

>I tend to side with
>the theory that letting the tank circuit capacitor decide when
>Vmax occurs is best. When the voltage peaks (meaning the cap is
>fully charged and the line voltage rises due to the reduction in
>current flow into the capacitor), the static gap should fire if
>it is properly adjusted. The peak power should be delivered if
>the gap is rapidly quenched after firing.

Hi Richard,

What are your thoughts on this subject with regard to pole pig powered
systems?
 Not having gotten into this myself yet, I've been wondering if you'd ever 
run
into problems with an asynchronous rotary gap going in and out of phase with
the charge time of the caps.  I.E. the caps occasionally reaching Vmax when
the
rotary's gaps are not aligned for firing.  Have you or others here ever 
heard
any "beating" in your rotaries or noted any in the coil's output?  I realize
that rotaries are the norm on larger systems due to quenching problems with
static gaps, but if some sort of "super" quenching static gap was possible
would this be ideal? (in terms of always allowing Vmax...I realize that this
is
theoretical and might not be practically possible)



Charles Brush