[Prev][Next][Index][Thread]

Fw: RE: 12 volt primary circuit.

Tim,

It isn't really that difficult to make a 1.2kw solid state flyback
driver.  Here is a extremely condensed way:

The simplest way is to just drive a set of push pull MOSFETs, like IRFZ44
for that voltage with a multivibrator running at your tesla coil
frequency in to a good old style flyback with hockey puck shaped
secondary.  Be sure to drive them _REALLY_ hard or they will burn like(in
the holiday spirit)chestnuts roasting on an open fire.  For 100 amps push
pull I'd use 4 IRFZ44s on each side.  Then wind maybe 4 turns of fat
cable on to the flyback, centertap it to ground.  Connect each bank of
MOSFETs to one of the sides of the winding.  Put good snubber diodes
across your MOSFETs and the winding.  Just for fun, at this point you can
connect the high voltage of the flyback secondary to a lightbulb or make
a jacob's ladder or something and flip the switch to test if it works. 
If the bulb lights up or your jacob ladders burns, you can go ahead and
hook up the high voltage secondary of the flyback and ground to your
tesla coil primary.  Tuning it is simple, just vary the frequency on your
multivibrator.  In no time you will have 4ft streamers.

Bryan

>>
Original Poster: Dale Hall <Dale.Hall-at-trw-dot-com> 

Tim,
See my recent replies re: small/first TC's.
Mine is portable uses 12v AA NiCads (1 watt, .04A 12V),
 does 28" power arcs once per 3/5 sec.
It can be scaled up to your 1200W level + more robust gap.
Just requires a beefier DC-DC converter to boost 12 to 7kV - 20kV
Mine presently uses a commercial 1/5" TV video monitor 7kVout flyback
with the CRT and unnecessary electronics removed.
Design difficulty rises with higher power DC converters.
There are those on the list working on such.

Regards, Dale
Redondo Beach, Calif.

-----Original Message-----
From: Tesla List [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, December 18, 1999 7:20 PM
To: tesla-at-pupman-dot-com
Subject: 12 volt primary circuit.

Original Poster: timp-at-clarityconnect-dot-com 

	Has anyone built a coil with a low voltage, hi current
primary circuit ?  Something like 12 volts/100 amps.  What I've
read on most of the web pages is that power in = power out and 
that the high secondary voltage produced is a result of resonant rise.
	I'd like to be able to haul the coil and batteries into
a clear spot in the woods with a couple of ground rods in place.
Out of sight with no AC power lines in sight either.

Another clueless newbie, Tim 	
<<

 





___________________________________________________________________
Why pay more to get Web access?
Try Juno for FREE -- then it's just $9.95/month if you act NOW!
Get your free software today: http://dl.www.juno-dot-com/dynoget/tagj.