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Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
Depends on the inductance and resistance of the load and that caps and the wires and everything else. There is this RCL calculator that you can use to find the peak current in your setup but I don't have a link.
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
First of all read this and this then go here to the RCL simulator
Everything you have asked and is likely to ask has been asked and answered on the forum before. Search the archives or add site:4hv.org to your google searches.
Registered Member #1316
Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365
I will be testing the flash lamp idea tomorrow with my 1000 uf 400 volt bank. I got a 300 A peak SCR from Frys and made the working coil gun with ok results using 3 flash caps.
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
That's 80J if I did the math right. I would suggest a blast shield to protect yourself from the tube if it decides it can't handle that much energy. Just to be safe.
Registered Member #1208
Joined: Thu Jan 03 2008, 05:30PM
Location: Chesterland, OH
Posts: 154
I am an alien:
E=CV^2/2
where: C= Capacitance in farads V= volts E= energy in joules.
and i agree completely with Myke about the blast shield. especially considering that you are running it at ~8x rated energy.
i ran a nice one without problems at 4x rated, but that doesn't say much, given that you flash tube is probably a lot younger, and thus less well made, than mine
additionally, SCRs can usually be overdriven a bit (what can't, keeping really tight tolerances is more costly than overshooting the ratings)
"do ya feel lucky, punk?"-some movie that i forget
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Flash lamp coil gun
