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Re: PFC for 12kV 60mA NST ATTN: Terry

Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Tim,

I used MicroSim to find that value sort of by trial an error with the program. The PFC caps took the line current from about 16 amps to 8.5 amps. I have never used any equations but I am sure there are some out there. It is dependent of if the coil is LTR, static or sync gap, NST etc.

The PFC caps should not have any effect on saturation.

In general you would wont the PFC caps to be a little on the low side since too much capacitance could do odd things. But that is not real likely at these current levels.

Cheers,

        Terry




At 12:18 PM 11/15/2005, you wrote:
terry et. al.,
i saw on your webpage
<http://hot-streamer.com/TeslaCoils/MyCoils/BigCoil/BigCoil.htm>http://hot-streamer.com/TeslaCoils/MyCoils/BigCoil/BigCoil.htm
that you used 200uF 180 VAC Power Factor Correction caps on a 15kV 60mA NST, is this a calculated value?

PFC CAP VALUE= (%PC)(E output)( I output)
                                                    2*pi*freq.*sq(E input)

I've read that 100% PFC is not always best for TC's, some say 65%, 80% , etc....
where does the actual values fall?
If you hear humming from variac, saturation I assume, should you up the PFC value? Does this even have anything to do with it?
Or is it like DC smoothing, just dump a 'bunch' of uF in the circuit? i.e. you had 'x' amount of caps laying around, and hooked them up, with the value turning out to be 'blah' (or in this case 200uF)
I tried to follow the latest string on this, however, it was pole pig specific, and obviously that is a whole different story.


thanx
Tim