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4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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Science Project

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Plisco
Wed Nov 28 2007, 12:19AM
Plisco Registered Member #1119 Joined: Wed Nov 14 2007, 09:15PM
Location:
Posts: 9
NST? MOT? what is that?
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Plisco
Wed Nov 28 2007, 12:24AM
Plisco Registered Member #1119 Joined: Wed Nov 14 2007, 09:15PM
Location:
Posts: 9
Link2
So i take it that converts up to 1000V AC to DC, or am i being really slow and not getting something?
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Shaun
Wed Nov 28 2007, 12:37AM
Shaun Registered Member #690 Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616
Yes, this rectifier will do exactly that.

For future reference:
NST- Neon Sign Transformer - will step up wall voltage to anywhere from 3kV to 15kV, and are current limited to anywhere from 15mA to 120mA. Make sure to use the large, iron core ones not the new, solid-state ones.

MOT-microwave oven transformer- durable, high power transformer found in a microwave that steps wall voltage up to around 2kVAC, at power usually between 900W and 1700W. Be careful- these are not current limited!

EDIT: Of course, both of these items make too much voltage for that particular rectifier.
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Plisco
Wed Nov 28 2007, 11:33AM
Plisco Registered Member #1119 Joined: Wed Nov 14 2007, 09:15PM
Location:
Posts: 9
Ok thanks for all the help.
Let me run over the basic design so yall can tell me if im missing something
1. Wall outlet to most likely 9 or 12 kv transformer
2.Run trhough rectifier to make DC
3. Wire through capacitor bank (not known what size and quantity. Suggestions welcome)
Run through switch then into rails.
Anything im missing. This is just a brief overview. thanks
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Cwazy
Wed Nov 28 2007, 11:43PM
Cwazy Registered Member #1106 Joined: Thu Nov 08 2007, 01:15AM
Location: Seattle, Washington
Posts: 25
you're missing the proctive diodes that prevent negative voltage from going into your caps.
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Electroholic
Thu Nov 29 2007, 12:19AM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
its a rail gun, L is practically zero. it will be ok without diodes.
BUT, bleeders on the cap bank would be a nice touch.
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Plisco
Thu Nov 29 2007, 03:08AM
Plisco Registered Member #1119 Joined: Wed Nov 14 2007, 09:15PM
Location:
Posts: 9
Im looking at getting some caps rated at 12000V and 50nF or 100nF. Would i get a substantial amount of energy from these if i use enough? Im kind of unfamiliar with capacitors
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