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Re: Mot DC Ps
Original poster: "Charles Hobson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <charles.a.hobson-at-btinternet-dot-com>
I looked at your web page gif: http://pages.infinit-dot-net/luc2/mot_dc_ps.gif
It was a pleasure to see such a well drawn schematic. Several comments on
the circuit though:
1. I can not see the need for the two lower sets of diodes connected across
the 2.2uF capacitors. They don't appear to be doing anything.
2. I bread boarded your bridge circuit and applied a low A.C. to it to test
it. Yes, it doubles the voltage. I then removed the diodes I mentioned.
Voltage doubling still occurred.
3. I don't think the circuit can be regarded as a full wave rectifier. The
2.2uF on the right charges to the peak value of the two MOT's in series
(around 6kV) via the two top right diodes during 1/2 the ac cycle. Then the
left 2.2uF capacitor charges to the peak ac value through the top left
diodes to 6kV during the other half of the ac cycle..The 2.2uF caps with
their 6kV in series deliver the 12kV to the load.
4. This is still a pretty hefty 12kV dc power supply. I would be concerned
about the 500k ohm power control. If you are after dc voltage control, I
think a conventional variac controlling the voltage to the MOT primaries
would be a better option:
.i e. safer to operate, efficient, etc.
5. I may be stepping into a mine field here by saying the 120 Bangs is not
applicable with a DC power supply. I think DC charging, resonant through an
inductor, or RC through a resistor, of your Tesla Coil primary capacitor is
more appropriate. Bangs per second would be limited or determined by the RC
time constant or the LC resonance.
6. Finally, I don't know your background or experience Luc, so I feel
obligated to say that your power supply can be very lethal have 12kV with
plenty of current behind it. Good luck, take care and carry on.