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Forums
4hv.org :: Forums :: High Voltage
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High Voltage Source

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genious 7
Mon Aug 30 2010, 09:38PM Print
genious 7 Registered Member #2887 Joined: Sat May 29 2010, 11:10PM
Location: Panama City, Panama
Posts: 107
I'm trying to obtain a high voltage, low current source (<3ma). I can use either a flyback or a MOT. In the case of a MOT, I have several diodes, so I could make a multiplier.

My question is: which should I use the Mot+ multiplier or the flyback (DC flyback by the way).

If using the flyback, what driver do you recommend, voltage wise (ZVS, 555, resonant 555)?

I'm going to use the setup mainly to draw some arcs, although I might use it to charge homemade capacitors.

There isn't a specific voltage I want to get, just as high as I can (within the reasonable) get.
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Plasmana
Mon Aug 30 2010, 09:52PM
Plasmana Registered Member #3108 Joined: Thu Aug 12 2010, 05:37PM
Location: Worthing, England
Posts: 72
If you are looking for low current HV source, then the resonance 555 driver is the best way to go. Normal 555 drivers are rubbish. wink

ZVS driver will give out more current and make more impressive arcs however, the output voltage is less.

Heres an schematic of the resonance 555 driver I had success with
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Matt Edwards
Wed Sept 01 2010, 11:13PM
Matt Edwards Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
Do the two 100K resistors from Pins 2/7 of the 555 connect to 0v?
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genious 7
Thu Sept 02 2010, 02:30AM
genious 7 Registered Member #2887 Joined: Sat May 29 2010, 11:10PM
Location: Panama City, Panama
Posts: 107

Do the two 100K resistors from Pins 2/7 of the 555 connect to 0v?

No, the leg of the 100k potentiometers are left disconnected.
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Matt Edwards
Thu Sept 02 2010, 04:54PM
Matt Edwards Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
Ah, silly mistake. I didn't notice they were pots...
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Dr. Dark Current
Thu Sept 02 2010, 09:33PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
The resistor-capacitor-diode snubber serves no purpose in that circuit. I'm the author of the original "quasi-resonant" driver concept by the way...
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Matt Edwards
Thu Sept 02 2010, 10:32PM
Matt Edwards Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
If that is the case then perhaps you could post the original circuit so that rookies like myself can give it a try.
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Dr. Dark Current
Fri Sept 03 2010, 07:53AM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Ok here is the circuit, the simple version: Link2
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Plasmana
Fri Sept 03 2010, 10:11AM
Plasmana Registered Member #3108 Joined: Thu Aug 12 2010, 05:37PM
Location: Worthing, England
Posts: 72
Dr. Kilovolt wrote ...

The resistor-capacitor-diode snubber serves no purpose in that circuit. I'm the author of the original "quasi-resonant" driver concept by the way...


Ah okay, that I didn't know, I was experimenting what happens if I put this here and that there smile
I don't know why, but the snubber circuit allows me to stretch the arc even further.
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genious 7
Sat Sept 04 2010, 06:57PM
genious 7 Registered Member #2887 Joined: Sat May 29 2010, 11:10PM
Location: Panama City, Panama
Posts: 107
I found this driver. Between Dr. Kilovolt's driver and that one, which one would you recommend voltage wise?

Edit: found this one as well. same question.
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