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Re: [TCML] Using thyristor to dump energy in one half cycle?
vatercox@xxxxxxx wrote:
Dear List, I am asking if it would be possible to use a thyristor or
thyratron as the switching element in a TC if it could be arranged
that all the energy in the primary cap would be "dumped" (i.e. the
capacitor completely discharged) within one half-cycle of the
oscillatory period. I am under the impression that thyratrons and
thyristors (possibly excepting hydrogen thyratrons) are in the main
considered practically useless for TC due a reputation for "slow"
switching. Would some kind of "hard" switching -e.g. extended
application of the gate current in an SCR after the primary cap had
discharged- be able to accomplish this and if so would it be of any
benefit?
Jolyon _______________________________________________ Tesla mailing
list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
Jolyon,
The simple answer: No - at least no, and still have a "Tesla Coil".
To achieve complete energy transfer within one-half cycle, the
coefficient of coupling would need to be 1, and you would effectively
have a transformer, not a Tesla Coil. Tesla-like dual resonant
transformer circuits are sometimes used in certain high-energy pulsed
power applications. These can transfer primary energy in 2 half-cycles,
use a coupling coefficient of 0.6, and require using heroic insulation
and field control techniques to prevent flashovers. Pulsed capacitor
TC's typically use coupling in the range of 0.1 - 0.22 so that they can
use simple air insulation.
Bert
--
Bert Hickman
Stoneridge Engineering
http://www.capturedlightning.com
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