[TCML] Quench time
Barton B. Anderson
bartb at classictesla.com
Sun Nov 25 13:56:20 MST 2007
Yes, that is true. But the losses are comparative. From an efficiency
standpoint, it is less efficient to transfer energy over a greater
number of cycles (if looking only at the transfer losses). But how the
transfer results in losses elsewhere in the system is where we must
compare overall losses. The typical coil cannot take advantage of higher
frequencies in the range Chris is looking at, but Chris's coil can. By
reducing the secondary losses with high conductance and few turns, the
gap losses (which are thermally huge) are the real threat (just like our
coils).
All coils use energy over time to do what they do. Typically, we use
many turns in the secondary and di/dt to achieve the energy storage and
breakout voltage, but higher frequency can be very lossy. Chris's coil
can actually take advantage of a higher frequency to promote a large
di/dt without the need for a high turn coil. We normally consider
secondary losses as insignificant. Their only insignificant in the fact
that secondary losses are compared to gap losses, transformer losses, etc.
It may prove that this is "not" a good method for spark production (if
that is where Chris is eventually going with this coil), but Chris is
simply experimenting with an idea. Very refreshing I think.
Take care,
Bart
> For a given power level, as the number of transfers of energy per unit
> time increases the energy of each transfer must decrease. Otherwise we
> would get free energy; a direct violation of the second law of
> thermodynamics.
>
> Jared Dwarshuis
>
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