RE: LTR Charging vs. Firing Time

• To: tesla-at-pupman-dot-com
• Subject: RE: LTR Charging vs. Firing Time
• From: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Mon, 21 Jun 1999 19:09:57 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

> Original Poster: Gary Lau  21-Jun-1999 1000 <lau-at-hdecad.ENET.dec-dot-com> 
> 
> SNIP
> 
> >So the optimum firing time for my coil is 3.5mS after the AC line
> >voltage.  This works out to 0.0035*60*360 = 75.6 degrees (I have
> >incorrectly quoted this in older posts as around 30 degrees).  The peak
> >voltage can reach 24kV as I am playing with the timing of the rotary sync
> >gap.
> 
> SNIP
> 
> Hi Terry:
> 
> While it's clear how to adjust a simulation for optimal sync RSG timing,
> how do you adjust a real coil?  Is it sufficient to simply rotate the
> sync motor in it's cradle for maximum arc length, or do you scope the cap
> charging voltage vs. AC mains voltage at a low variac setting and adjust
> the motor phase, prior to cranking up to full power?  I know that it
> would be bad to apply power when the phase is 90 degrees away from peak
> (zero cap voltage at gap presentations)...
> 
> Regards, Gary Lau
> Waltham, MA USA

I don't suppose the timing could be simply worked out by taking the 
period of the resonant frequency of cap and transformer leakage 
inductance into account could it? I seem to remember Dr Resonance 
confirming such an idea a while ago.

?
Malcolm

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