Re: [TCML] Top volts with losses (formula bad)

["Dex Dexter" <dexterlabs@xxxxxxxxxxx>]

Exactly.
It seems you understand my basic idea how I 
approached the problem.
But also,try to understand my disappointment.
I worked on this for two days,almost give up
few times discouraged by "Ramanujan like" 
monster expressions Mathemaica offered,and
then,suddenly, I thought I found something
nice and pretty preceise in the same time.
And then,just 2 hours after I posted my 
"discovery" to TCML,to my horror,
I spotted what was the problem...
It was too nice,and too simple,
to work for messy coiling world.
The world where spark loaded secondary Q is low. 

Dex
     
    
--- tcml88@xxxxxxxxxxx wrote:

From: Paul Nicholson <tcml88@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Top volts with losses (formula bad)
Date: Wed, 10 Feb 2010 17:49:30 +0000

Dex Dexter wrote:
 > Formula is not good.Forget about it!

I thought it was good.   I didn't take the time to test it
or reproduce it, but I could see how you must have arrived
at it.

You must have worked out the time duration to the first
voltage max - a function of k and F (lossless case), then
used that as the time variable in an exponential decay factor
having as the decay rate a function which combines the Q factors.
It looked pretty reasonable, with F cancelling out as you
would expect.

 > Max secondary voltage in typical tesla coil with
 > heavier damping (and same k) usually occurs before
 > that time...Damn.

I see what you mean, too bad.   The approximation that allowed
you to separate time-to-max from decay rate is failing at low
Q.

 > I don't know how I could miss something like that.

But you didn't miss it - you spotted it and reported the problem.
What more could we ask for?
--
Paul Nicholson
--
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