ign coils in antiparallel , was: Re: RE: Hello, delurk and question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Frank Van der Auwera by way of Terry Fritz <twftesla-at-qwest-dot-net>" <fvdauwer-at-uia.ua.ac.be>


On Wed, 06 Jun 2001 11:03:23 -0600 Tesla list 
<tesla-at-pupman-dot-com> wrote:

> Original poster: "sundog by way of Terry Fritz 
> <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>
> 
> Hi All, Frank,
> 
> Yup!  I've had a good deal of problems with my IGN coils 
> sparking to the terminals with no load on it. 
SNIP
> 
> 	Something you can do is grab a similar IGN coil and 
> run them in anti-parallel.  I've gotter a 1kw run out of my 
> coils (120v-at-~8A) for 10-15 sec, but the coils got *very* 
> hot, very fast.  At ~300w output, they ran continiously for 
> ~5 min before the cans grew warm.  The guts will 
> be considerably hotter, but the whole IGN coil lashup was 
> small enough to dump in the 'fridge for a bit to help cool 
> them off.  With 2 coils in anti-parallel, you've basically 
> got a center-tapped tranny, and even without the home-made 
> insulators, mine showed little interest in the terminals 
> of the coils, preferring to arc to the center lugs (the 
> negative terminals), or to the other HV output. I used a 
> 600w dimmer and 2 big AC run capacitors wired in series for 
> ~50-60 uf.  The bigger the runcap, the more current it 
> draws.
> 
> 	And be careful, running them in anti-parallel gives 
> you a *really* good difference in potential between the 2.  
> It'll arc a goodly distance to reach you, if you give it 
> the chance :)
> 
SNIP

antiparallel. hmmm. you mean like this?

                                         
         -------       ---||---     -    ---------\
    -----|DIMMER|------|       |---------|         --
    |    -------       ---||---     + ---| I C     --   
 220 V AC              2x 0.470 uF    |  ---------/     
    |                                 |
    |                               + |  ---------\
    |                                 ---|  IC     --
    |                                 ---|         --
    |                               - |  ---------/
    |                                 |
    -----------------------FUSE--------

Or should i wire together the negative primaries and drive 
the positives? Or doesnt that matter? Should i insert a 
damping coil in the primary driving circuit?

Frank Van der Auwera.

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