RE: audio modulated SSTC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: herwig.roscher-at-gmx.de 


Daniel, Jan, Finn, Jim, David and all, who helped,

Thank you very much for your quick assistance. I have gained a lot of
insight. In order to summarize:

1. Push-pull-/single-ended-mode of TL494 controller:
     I understand, that these are control modes only and have nothing
     to do with audio modulation itself. Push-pull-mode may be used to
     reduce the power, dissipated in the switching components.

2. Audio modulated self-resonant systems: My fault was, that I
     assumed special problems while using  *digital* modulation.
     "Actually self-resonant systems just keep the phase difference
     between drive signal voltage and TC current draw at zero
     degrees." The advantage of self-resonant systems should be their
     relative insensibility to changes of the secondary coils natural
     frequency.

3. Driving the resonator digitally:
     I learnt, that it is possible to drive the secondary coil not
     only with sine waveshapes (as in "conventional" systems) but with
     digital waveshapes as well. "A unique property of driving a
     resonant load with a stepped voltage at it's resonant frequency
     is, that it automatically aligns to zero current switching."

Again any answers and comments are very welcome.

Herwig












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