Em 09/12/2019 11:45, Udo Lenz escreveu:
The german website Wikipedia is referencing, is mostly about SSTCs. A useful figure of merit is the power transferred to the secondary for a given input current. The input current is a mixture of a resistive and a reactive part, the latter usually being much larger. The resistive part is the one transferring power into the coil and that part peaks at the secondary resonance frequency. By choosing a frequency somewhat beside the resonance, it is possible to reduce the reactivepart of the current, but the optimum amount of detuning depends not only onthe coupling, but also on the loading of the secondary.A much better way to reduce the reactive part is by putting a cap in serieson the input side, such as in a DRSSTC. In this case the preferred input frequency is the secondary resonance frequency and the necessary cap for this must be chosen with L1*C1=L2*C2. Sadly this configurationhas stability issues. Stable operation can be obtained at the pole frequencies.There L1*C1=L2*C2 might not be the best choice, but that is a topic way outside the Wiki article. For an SGTC, L1*C1=L2*C2 is necessary for a complete transfer of primary energy to the secondary. The Wikipedia entry defintely needs a correction.
I did some cleaning in the Wikipedia entry, some edits still pending. The formula was corrected, and many references to "disruptive" or "pulsed" operation were changed. There is also a tendency shown in many sites and Youtube to consider the output of the Tesla coil as coming in single pulses, what is false. Corrected also were several confusions between current and voltage. The article is very long, and may still hide more than a few errors.
Antonio Carlos M. de Queiroz _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla