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Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
Hey,,
I am just wondering and I really need your help because I am planning to build another DRSSTC, and This will be my specs:
SECONDARY: 6 inch diameter 24 inch height 30 awg wire fres : ~100khz (torroid will just follow to meet low freq)
MMC: .075uf
PRIMARY: 12 turns .25 copper tube
BRIDGE: Half bridge of IRG4PC50UD igbts (600v @ 240Apk?)
IS this igbt capable of producing 5-6 ft arc in my specs? Also, the site > I am worrying for the dimension of my secondary. 1500 watts was indicated there in the chart, I am scared that my IGBT wont last and wont capable to drive such current to produce 5-6ft arcs.. thanks in advance.
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Your design looks good enough to go on and build it, but your expectations are dangerous and will severely disappoint you. At 240Apeak you properly should expect up to 2 feet instead.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
based on the information in the site ,
IRG4PC50UD igbts can produce atleast 5 ft.. and when I saw the datasheet of the IGBT, the Pulsed Current Collector rating is only 220 amperes. So is the 5ft arc with this IGBT true??
Thanks for your input.. Also, some of the coilers which also used this type of IGBT, can produce 4ft arc.. with their <2 ft secondaries..
Well it is obvious that I don't like to find it out for myself anymore, I have very limited resources here in my country =)and If someone has experienced using the same specs why wouldn't I listen and ask for their output? =) I only ask for some info and comments based on the posted specs but not question for why am I asking for it =)
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
Hmm I wonder how long that coil on the HVWiki lasted, pushing 5' of arc out of a poor little 50A transistor. 'tis no longer fashionable to push your H-bridge to destruction like it was back when DRSSTC's were young. Driving your transistors a little above their ratings gives nice results, and a good reliable coil.
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
are the IRG4PC50UD the only fets you have they will be to feeble for your efforts. you will have to pass about 500A for 300uS to get 5 ft sparks. you would need mini bricks like Dr. Isotop's avatar. you would have to just try something.
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Is this A good design?
