Re: Theory - primary cap duty -transformer output current

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

Original poster: "Jason Petrou by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com>

Scot,

Exactly what I thought... why have the gap firing at zero? duh i mean the
only energy in it at zero is gonna be from the downwards bit of the AC sine
wave.. I have got 200BPS gap, but it fires at 45 degrees each side of the
sine peak, instead of at 90 and zero.. this way you get smoother streamers
and your electrodes take about 10 times as long to burn up.

Keep on coilin'
Jason

Geek # 1139 Rank G-1
www.thegeekgroup-dot-org

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, July 04, 2001 12:33 AM
Subject: Re: Theory - primary cap duty -transformer output current


> Original poster: "BunnyKiller by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<bigfoo39-at-telocity-dot-com>
>
> Tesla list wrote:
>
> > Original poster: "PotLuck by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <potluckutk-at-earthlink-dot-net>
> >
> > My inquiry focuses on transformer current and the primary cap.
> > My understanding is that once the primary cap is charged and the firing
spark
> > occurs that the transformer's current during the HV pulse and "ringing"
> are no
> > longer a factor, that the energy stored in the primary cap becomes the
sole
> > provider of current in the tank circuit.
>
> Snipperzz...
>
> HiPot     ( snickerz) its a joke HiPot test ....
>
> anyway ...   there are 2 schools of thought on cap charging and
> discharging...   some say 4 times
> per full cycle some like 2 times per cycle...
>
> the 4 times per cycle is when you take the starting voltage at 0 degrees (
> 0 V ) and allow the first
> 90 degrees to charge the cap to a " positive " full volt rating, fire the
> gap there ( SRSG works
> great here) the full potential of the charged cap gets dumped into the
> primary at this time. From 90
> degrees to 1880 degrees the "Positive" voltage is on the down fall ( this
> is where i get lost) ((
> only thing I can think of is that the voltage from "full" to dropping does
> allow a bit of charge to
> fill the cap as it is falling, but the time it has to do it in is
minimal))
> at 180 degrees the gap
> fires again, thus discharging that bit of charge in the cap. Then we swing
> into the " negative" side
> of the voltage swing ( V going negative on the sine wave) and this charges
> the cap in the reverse
> polarity ( this is why DC caps dont work with coiling ) at 270 degrees the
> gap fires again at full
> "negative" voltage. and the cycle continues .......
>
> the other idea is that the cap gets charged to full positive voltage at 90
> degrees and cap is
> discharged at that point...  and time is allowed to let the voltage after
> the initial firing go back
> to 0 volts ( ??? ) at 180 degrees. This then reverses and the negative
> voltage begins to increase to
> the opposite potential.. and at 270 degrees the gap fires again....
>
> Heres the clincher tho....  just after the gap fires, the primary coil and
> cap do the oscilation
> thing ( this is what allows the secondary to be matched in frequency (
> tuning the primary) This
> oscillation action removes alot of the power and voltage from the cap ((
> this must happen fast cuz
> how else does the cap get recharged ???  my turn for a question ... how
> about it you electro gurus
> got the answer for me ??  ;)  ))
>
> another question...   when the gap misfires how does this overcharge the
> cap and blow it? where does
> this extra voltage come from??
>
> sheeshhh  now im thinking again ;)
>
>
> Scot D
>
>
>
>