Re: [TCML] More wire better?

["Jared Dwarshuis" <jdwarshuis@xxxxxxxxx>]

Hi Gary:

We use large tank capacitance in part for high Q. We also use large tank
capacitance as part of current limiting. A way to minimize pig ballast.


On Dec 18, 2007 9:46 AM, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> If you are attempting to raise Q by increasing the numerator of
> circulating-power / loss-per-cycle, wouldn't increasing the tank capacitor
> value accomplish this as well?  The question then becomes do inductor losses
> increase more slowly with inductance, vs. capacitor losses with capacitance.
>  And to further complicate things, I think one must also consider what
> happens to the losses in the other tank component - if you maximize Q in the
> inductor, what have you done to the Q of the capacitor by forcing it to some
> extreme value?  Correct me if I'm mistaken, but I'm assuming that it's the
> combined Q of the tank circuit that matters.  I don't myself know the answer
> and was wondering if you had evidence of one or the other.
>
> The answer however is academic, as there are many more variables and
> constraints involved.  The primary capacitance must be selected to match the
> charging capability of the power supply, and this takes precedence over Q.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Jared Dwarshuis
> > Sent: Monday, December 17, 2007 6:46 AM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] More wire better?
> >
> > Here is what we can say:
> >
> > Q = circulating power / loss per cycle
> >
> > We can do very little to influence the loss per cycle in the
> denominator.
> >
> > We can do a lot to the numerator!
> >
> > Raise the circulating power to very large levels using gigantic
> inductors
> > and the system Q goes up.
> >
> > True there will be added resistive loss, but this is insignificant.
> >
> >
> > Jared Dwarshuis, Larry Morris
>
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