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Forums
4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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thyristor?

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Solidacid
Sat May 31 2008, 12:55PM Print
Solidacid Registered Member #1430 Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
hey all.
im working on a small coilgun and i need a trigger, i found This.
i was wondering, how can i calculate the maximum amount of uF at 300v i can switch with the thyristor.

also, how do i figure out the "amps" of a capacitor based on uF?
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Bjørn
Sat May 31 2008, 04:20PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Keep the datasheet in one hand and this in the other: Link2

Each capacitor is different so you need to read the datasheet for that too.
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Solidacid
Sat May 31 2008, 07:50PM
Solidacid Registered Member #1430 Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
this is just what i needed :D thank you!

now i just need to figure out the inductance(H) of my coil, any suggestions?
i read somewhere that you can calculate it with a sinewave generator but i don,t have acces to one
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uzzors2k
Sun Jun 01 2008, 11:17AM
uzzors2k Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Without a scope or LC meter you'll need to use math to estimate the inductance. Link2 Make sure you find one for multilayer coils.
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Saz43
Wed Jun 18 2008, 06:05PM
Saz43 Registered Member #1525 Joined: Mon Jun 09 2008, 12:16AM
Location: America
Posts: 294
Solidacid wrote ...

this is just what i needed :D thank you!

now i just need to figure out the inductance(H) of my coil, any suggestions?
i read somewhere that you can calculate it with a sinewave generator but i don,t have acces to one

Link2
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Fraggle
Thu Jun 19 2008, 02:55AM
Fraggle Registered Member #1526 Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
I find the mains to be a handy sinewave for measuring inductance.
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Shaun
Thu Jun 19 2008, 04:00AM
Shaun Registered Member #690 Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616
Definitely use the site saz linked to, its very good. Don't forget to check out his RLC simulator as well, its number 3 on the Mark II menu. RLC sim will take your capacitor and coil specs and tell you peak amps, among other things.
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Dr. SSTC
Sat Jul 26 2008, 08:59AM
Dr. SSTC Registered Member #1407 Joined: Fri Mar 21 2008, 07:09AM
Location:
Posts: 222
that thysistor propably would work
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