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4hv.org :: Forums :: High Voltage
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current pinch, how to make a multable high voltage switch, with about 1-0.1ms turn on

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Andy
Thu Jan 15 2015, 07:14AM Print
Andy Registered Member #4266 Joined: Fri Dec 16 2011, 03:15AM
Location:
Posts: 874
High I,ve been thinking about make the bwlow picture, instead of batterys a bridge recifer, maybe powered from 480volt mains or a Nst.
Im trying to work out a quick timing switch for really high volts, I,ve seen a angle grinder turning a multable sparkgap disc, but im not sure if it will be fast enought for the size of the caps, and switch on at the same time. Was wondering if anyone has some ideas

1421306075 4266 FT0 Img 20150115 200906
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Fredrick
Tue Jan 27 2015, 07:31PM
Fredrick Registered Member #1339 Joined: Wed Feb 20 2008, 04:43PM
Location:
Posts: 9
Whats "really" high voltage ? do the switch closure times have to be precise ? A multi-pole rotary switch might work. Sounds like you want all the switches to close simultaneously. This is trickier. There are some pretty high voltage IGBT's these days but complex drive requirements.

GDT's close in nanoseconds. perhaps a crude trigatron using gas arrestors biased below the breakdown point (this has worked for me.

Please elaborate on your application.
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Andy
Wed Jan 28 2015, 04:07AM
Andy Registered Member #4266 Joined: Fri Dec 16 2011, 03:15AM
Location:
Posts: 874
Hi Fredrick, planning on creted multiable wires by the design above to make the amp-turns the same as a really high joule source say 200kv and 100uF, but as thevoltage would be to high for caps like that, was trying to make times ten wires and divide by ten voltage.
With the design I need to close the switchs etc close to the same, as the pulse isnt going to last long.
The goal was 10-20kv but can use less and more current paths, to some degree.

Going to do some searching on trigatrons to see how they work

Cheers
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Kolas
Wed Jan 28 2015, 07:14AM
Kolas Registered Member #102 Joined: Thu Feb 09 2006, 08:15PM
Location: Raleigh, NC
Posts: 169
i am sorry but 200kv at 100uf is beyond absurd.
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Sulaiman
Wed Jan 28 2015, 12:05PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
i am sorry but 200kv at 100uf is beyond absurd.
.......................................... ..................
Kolas, where is your sense of adventure ?
it's only 2 MJ (and about 2 M$),
less than half the energy of a typical lightning bolt cheesey
(less than a pound of TNT, or a few hand grenades, or one large sandwich)

Andy, don't forget to wear earplugs,
and the clothes that you want to be buried in cry
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Andy
Wed Jan 28 2015, 03:54PM
Andy Registered Member #4266 Joined: Fri Dec 16 2011, 03:15AM
Location:
Posts: 874
So for the miss understanding, was meaning two kw/hour with 1-0.1mS pulses at a high voltage.
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