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Re: SSTC does 10 foot sparks
Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
From what i understood, i thought John was referring to power factor
issues and other things like "average power" where really all the energy
may still be accounted for. But im still a bit unclear about what you
meant John, maybe you could elaborate??
IF it is just a question of peak powers, i recall my pspice simulations
suggesting something of around 1.5 megawatts peak from the IGBTs.
Steve
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: SSTC does 10 foot sparks
>Date: Fri, 18 Jun 2004 21:42:16 -0600
>
>Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>
>
>
>Hi John,
>
>What you say may be true, but it is misleading. You can NOT get more
>average power out than what is coming in. If you could, you should get a
>patent and become rich. Peak power yes. You store up energy over a large
>time and then discharge it in a small time and the peak power out will be
>larger than the peak power in.
>
>Gerry R.
>
>
> > Original poster: "John Couture" <johncouture-at-bellsouth-dot-net>
> >
> > Steve -
> >
> > Congratulations on your getting 10 foot output sparks from your SSTC coil
> > with 4800 watts input. Do you know that the power output of your Tesla
>coil
> > can be much greater than the power input? In other words the output power
>of
> > your
> > TC can be much greater than the input of 4800 watts. This means the power
> > efficiencies (power output/power input) of your TC can be well over 100
> > percent. It is very difficult if not impossible to determine the true
>power
> > input or power output for a particular output spark. The ratio of power
> > output to power input is mostly an unknown for TC's. To my knowledge no
> > coiler has ever properly made these measurements.
> >
> > This is why it makes more engineering sense to use energy input and
>energy
> > output in rating TC's. The energy efficiency is then equal to energy
> > output/energy input. This efficiency is always less than one or 100
>percent
> > and can be measured as I have shown in the past.
> >
> > As a final comment and to avoid muddying the waters I believe the
>statement
> > "4800 watts input for a 10 foot spark" is an acceptable wording for rating
> > TC's in a free speech country. The pictures of those sparks show that no
> > matter what you call them they represent a great achievement in Tesla coil
> > progress for SSTC's.
> >
> > John Couture
> > ---------------------------------------
> >
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Friday, June 18, 2004 1:52 PM
> > Subject: Re: SSTC does 10 foot sparks
> >
> >
> > > Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
> > >
> > > Oops, forgot to mention the power consumption is less than 4800W... not
> > > exactly sure because i dont have a watt meter that big but i have it
>both
> > > fused and breakered to 20A and even after quite long runs it has never
> > > popped the fuses or breakers. My guess is around 4kw to make 10 foot
> > > sparks. Solid State is the only way i would ever have a coil this
>large
> > at
> > > my house... i cant really feed a pig on my 20A line.
> > >
> > > Anyway, i ran the coil again last night for a pretty long time. We had
>a
> > > "cage of death" set up so i limited my output to 7 feet (though it hit
>the
> > > ground at 9 feet several times as well). At this distance there arent
> > > streamers... just power arcs to the cage the whole time. The friends
>all
> > > loved it and we had a fun safe night that went without problems ;)
> > >
> > > Steve Ward
> > >
> > >
> > > >From: "Tesla list" <tesla-at-pupman-dot-com>
> > > >To: tesla-at-pupman-dot-com
> > > >Subject: Re: SSTC does 10 foot sparks
> > > >Date: Thu, 17 Jun 2004 18:54:02 -0600
> > > >
> > > >Original poster: "Brian" <ka1bbg-at-webryders-dot-net>
> > > >
> > > >Hi, NICE! do you have any idea what the power input is? you are "HOT"
>on
> > > >these ss coils! cul brian f.
> > > >----- Original Message -----
> > > >From: "Tesla list" <tesla-at-pupman-dot-com>
> > > >To: <tesla-at-pupman-dot-com>
> > > >Sent: Thursday, June 17, 2004 10:46 AM
> > > >Subject: SSTC does 10 foot sparks
> > > >
> > > >
> > > > > Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
> > > > >
> > > > > Coilers,
> > > > >
> > > > > Recently there has been a lot of advancements in the SSTC area of
> > coiling.
> > > > > Im proud to be the first (or at least i *think* im the first) to
> > achieve
> > > >10
> > > > > foot (or better) sparks from a solid state tesla coil! The design
>is
> > > > > similar to that of my first ISSTC but using more robust gate
>drivers
> > and
> > > > > switching devices, and of course MUCH larger coils.
> > > > >
> > > > > I will eventually get the details up on my site, but for now here
>are
> > some
> > > > > pictures:
> > > > >
> > > > > http://www.hot-streamer-dot-com/srward16/ISSTCII/ISSTCII_goodpics/
> > > > >
> > > > > In some of the pics you will see it arcing to a green chair in the
> > > > > forground, this is 115"... a few times it struck out beyond that at
>(i
> > > > > approximate) 125". And i havent even put the max voltage on it!
>Im
> > > > > limited by the ground being so close ;) The coil stands 5" taller
> > than
> > > > > myself at 6'11". The output is fierce and constantly power arcs to
> > > >objects
> > > > > in the 9 foot range with some scattered action at 10+'... im sure
>if i
> > set
> > > > > it up just right i can get about 12 feet from this monster and that
>is
> > my
> > > > > goal (it was 9 feet but that was effortlessly achieved).
> > > > >
> > > > > Enjoy!
> > > > >
> > > > > All comments welcome.
> > > > >
> > > > > Steve Ward
> > > > >
> > > > > _