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Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
ifryd wrote ...
I would like to charge capacitor (16kV 0.05uF) and then discharge it with the frequency of about 250Hz. In each cycle of discharge capacitor will be fully discharged... Basing on the above which option would be best for me... (It is really hard to get reliable source of high voltage on market). I will add I want to fully charge capacitor to 10kV. Accumulation of Charge can be less than allows capacitor but I would like to achieve full voltage potential available from the transformer.
I think the neon transformer from FART will get you much closer than any OBIT. Its 10 kV no-load potential is a RMS value, so you could charge the cap ultimately to 14 kV, or charge it much more rapidly to 10 kV.
But you would need a bridge rectifier, leaving the capacitor with +7 kV DC on one terminal and -7 kV DC on the other terminal. And you will need better modeling of the NST behavior (or, even better, an experiment!) to determine the maximum repetition rate at 10 kV.
[edit]The NST certainly gets you into the right ballpark. I agree with jpsmith's calculation that your ideal charging power requirement is 625 W.
Registered Member #4215
Joined: Wed Nov 16 2011, 09:45PM
Location:
Posts: 32
But you would need a bridge rectifier, leaving the capacitor with +7 kV DC on one terminal and -7 kV DC on the other terminal.
Yes indeed and here comes problem. How to rectify such high voltage? I found high voltage diodes but of course they are harder to get and I also think more expensive. Maybe it is better to get few diodes and connect them serially? Anyway I think I will use BY16 diodes...
Strange copy and paste link because it does not want to work ?
And you will need better modeling of the NST behavior (or, even better, an experiment!) to determine the maximum repetition rate at 10 kV.
Now I think I understand from where there was 425W of power on output. I am really happy I took apart from 1 big high voltage capacitor 4 smaller capacitors (8kV, 0.1uF). In this way I willl connect 3 of them serially so I will get then 422.4W which is really close to transformer 425W.
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High voltage neon transformer Fart opinion needed...
