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Re: What this beast really is? (Re: Fw: frequency (fwd))
A couple of things:
- how do you plan to phase-synchronize the free oscillations of two consecutive
bangs (or am I missing something)?
- I'm not a transformer expert, but the number of turns for a given voltage and
a given flux density B is inversely proportional to the operating frequency:
lower frequency -> more turns. This means that to operate at 1/4 of freq.
(20kHz/5kHz) you should need more turns in both primary and secondary.
Otherwise
you are at risk of saturating the core. More experienced guys can comment on
this.
Regards
Tesla List <tesla-at-pupman-dot-com> on 23.04.99 23:50:10
To: tesla-at-pupman-dot-com
cc: (bcc: Marco Denicolai/MARTIS)
Subject: Re: What this beast really is? (Re: Fw: frequency (fwd))
Original Poster: Hollmike-at-aol-dot-com
In a message dated 4/23/99 4:28:50 AM Mountain Daylight Time,
tesla-at-pupman-dot-com writes:
>
> I bet you won't be able to catch the tail of a bang at 1000 Hz repetition
> rate
> with such a small capacitor: the oscillation will die out before your 1 ms
> is
> elapsed.
>
Marco,
That is why I am designing it to go up to 5000 Hz. My design is based on the
assumption of 30 oscillation cycles per bang. The TC frequency was designed
such that I should be able to "catch the tail" at 4000Hz charging freq. If
necessary I can use a cap up to about 7 nF(30kV) with what I have on hand,
although the impedance match becomes important at the higher charging rates,
if I am not mistaken. I suppose if 5000Hz is insufficient, I could alter the
timing circuit. The transformers I am using would actually work better above
5000 Hz(originally used at 20kHz). I could also play with the voltage a
lot. I plan on 10kV out from the trannies, but they will withstand up to
60kV. I will limit this to 30kV as more would make the corona problems
significant(max available capacitance would be 3.5 nF at this voltage to
ensure safety of my caps). The power output can be as much as 4800W(60kV -at-
80ma was the original output of the X-ray power suppy I removed the trannies
from) but I plan to keep it to about 1800W at this stage. As you can see,
there is much flexibility in my set up. I am just starting it and may make a
number of changes as it progresses, but am planning to make it adaptable to
improve the chances of success.
Any other comments or imput welcome,
Mike