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Re: Peak Primary Current

Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>

Ooops.. I misdivided.. see below..

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, April 20, 2005 11:04 AM
Subject: Re: Peak Primary Current


> Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Wednesday, April 20, 2005 9:14 AM
> Subject: RE: Peak Primary Current
>
>
>  > Original poster: "Mark Dunn" <mdunn@xxxxxxxxxxxx>
>  >
>  >
>  > Antonio, Terry:
>  >
>  > Thanks for response.  My testing confirmed Gary's observations(Gary's
>  > tests very interesting).  This contradicts old common "coilers" belief
>  > that heavy gauge wire is required for primary connections.
>  >
>  > I see I forgot Pi in the formula(Thanks Antonio for pointing out).
>  > So Imax = 2*Pi*Fres*V*C
>  > This makes Imax Pi times the values I had calculated so current is even
>  > higher than I thought.  I still can't believe I can push that much
>  > current through #14 ga wires with no significant heating!!  I realize
>  > each cycle is only 2uS and ring-up is only 10 uS with 1st notch at
40uS.
>
> So the duty cycle is quite low... 40E-6 seconds of current flow with
8666E-6
> seconds between bangs.  Ball park there is about 1/200..  Even though the
> power is the current squared, the small duty factor (0.005) means that
> average power dissipation is quite low.  For instance, if your rms current
> (during the bang) is 100 A, and the resistance of the wire is 0.01 ohm,
the
> peak power dissipation is 100*100*.01 = 100W.  The average power
dissipation
> would be only 1/2 watt in this case, though.

That's 8333E-6 seconds, not 8666.. No matter, the basic idea is still the
same.