Re: Equalizing resistors for electrolytic capacitors

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Hydrogen18" <hydrogen18@xxxxxxxxxxxxx>

This is meant for the filter cap for the power supply. Not the tank
capacitor.

---Eric
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, November 28, 2004 7:10 PM
Subject: RE: Equalizing resistors for electrolytic capacitors


> Original poster: "Black Moon" <black_moons@xxxxxxxxxxx>
>
> DC tesla coil? I hope you mean that its a solid state or tube tesla coil,
> as even if the chargeing system is DC with a spark gap coil, the ringdown
> is AC and requires AC caps
>
>
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: Equalizing resistors for electrolytic capacitors
> >Date: Sun, 28 Nov 2004 16:09:48 -0700
> >
> >Original poster: "Hydrogen18" <hydrogen18@xxxxxxxxxxxxx>
> >
> >List,
> >
> >     I have a large number of small electrolytic capacitors I am trying
to
> > connect in series. Since they have the nominal -10% to +85% value
control
> > on them the potential exists for a unequal division of voltages. I
> > understand than resistors across each capacitor can help solve this
> > problem, but have found no formulas or examples on what values should be
> > used. Is it an arbitrary thing? Any help you could provide would be
> > greatly appreciated.
> >
> >So far I have come up with:
> >
> >  I understand the time constant of Tau(R*C) correctly it would be:
> >
> >47000 * (330*(10^-6) = 15.51 seconds.
> >
> >so in about a 78(5 Time constants = 98% charge gone) seconds provided my
> >caps are at full voltage they will only be at 2 volts each with a 47k
> >resistor across each one.This is still a high voltage when you factor
them
> >being in series. Although at that low of voltage I should be able to
short
> >them and they wont have energy to internally damage themselves I think.
> >This is for a DC tesla coil filter cap
> >---Eric
> >
> >
>
>
>
>