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For my coilgun im running at 60v 90000uf using thick (16awg) wire. This means there is a lot of current needing to be switched, but not much voltage. I need to find an scr i can use, rated for at least 2000 amps. However, all the ones i find at that rating are around 1600v and cost a lot....does anybody know where i can get a low voltage high current one? (im thinking low voltage = lower cost?)
Registered Member #1262
Joined: Fri Jan 25 2008, 05:22AM
Location: Maryland, USA
Posts: 451
You can just parallel some lower current rated SCRs.
I havn't seen them below a couple hundred volts in general, maybe it has something to do with their construction?
I'd reccomend paralleling a good 5-8 SCRs each rated for 400A peak 10ms (if your coilgun can indeed reach such insane currents). It always pays to overbuild (a bit at least).
Registered Member #191
Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
60V and 2kA?? Cap ESR, ESL, coil resistance is going to seriously limit your peak current at that kind of voltage. Doubt you will need anything bigger than a 40A continuous SCR.
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where to find low voltage scr?
