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

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

Original poster: "sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>

Hi Frank, All,

I hook the negative terminals together, as the secondary is usually
connected to the negative terminals.  This effectively gives you a
center-tap.  I don't use any dampening coils, and my 120v supply is
breakered at 12A.  I haven't measured the output current or voltage (it's on
my "to do" list).  I also haven't tried running this on 220v.  Anybody know
how well it works on the other side of the pond?

														Shad



> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Friday, June 15, 2001 9:58 AM
> To: tesla-at-pupman-dot-com
> Subject: ign coils in antiparallel , was: Re: RE: Hello, delurk and
> question
>
>
> 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.
>
> ------------------------------------------------
> mailto:frank.vanderauwera-at-ua.ac.be
> work http://lib.ua.ac.be/u/fvdauwer
> personal http://lib.ua.ac.be/u/fvdauwer/personal
>
> ------------------------------------------------
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