Re: [TCML] DC Coils

[Finn Hammer <f-h@xxxx>]

Carlos,

No matter what transformer you are using, 1 or 3 phase, you need the
diode. A 3 phase transformer will allow you to omit the smoothing caps,
due to the 14% ripple of a rectified 3 phase supply, and this is a great
safety increase due to the lack of stored energy, and thus no need to
bleed off charge when de-energizing the coil.
But to keep the doubled voltage on the tank capacitor, you do need the
blocking diode in both configurations.
I would move it to a position between the tank cap and the inductor, to
avoid possible resonant effects of the inductor after the charge has been
transferred to the cap.
Just my 5 cents. My experience with DC coils is limited to the low
voltage versions of OLTC and T-BRISG's ;-)

Cheers, Finn Hammer

----- Original meddelelse -----

> Fra: lightningfor@xxxxxxxxxxxxxxxxxxxxxx
> Til: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Dato: Tor, 12. jan 2012 20:00
> Emne: Re: [TCML] DC Coils
> 
> Hi Finn,
> I am using a 3 phase supply so on theory I should not need one... But
> because I like to play things safe, YES, I also placed another diode
> in
> serries with the inductor between the power supply and inductor.
> Admittedly, the max break rate that the inductor was calculated for
> was
> about 500-600bps and I am only currently running 180bps, but in
> theory with
> the de qing diode this should not be a problem...? Is that correct?
> 
> Carlos
> 
> On Thu, 12 Jan 2012 18:03:07 +0100, Finn Hammer <f-h@xxxx> wrote:
> > Carlos, all
> >
> > I think Carlos, referring to voltage being doubled, is talking
> about the
> > DC resonant voltage doubling of the tank cap, due to energy stored
> in
> the
> > charging inductor during the time the gap is conducting.
> > This requires a blocking diode between the cap and the inductor,
> also
> > called the de-qing diode.
> >
> > Carlos, can you confirm that such a diode is in position?
> >
> > Cheers, Finn Hammer
> >
> 
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