Originally posted by wings
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It demonstrates how independent oscillations can be 'reactively tuned' to become phase coherent.
Initiate an impulse in an AC soft iron circuit and the pendulums are always energised one way.
Remove the source and without load their moment (back-EMF) becomes a damped oscillation.
However;
where a core flips polarity about its physical macro 'neutral zone' position wrt a magnet,
this is a transducible one way - NON OSCILLATORY - event,
yet one which may be arranged to be continuously on-going,
via mechanical (Wesley Gary), electrical (Hubbard) or both methods (Hendershot) induction,
and where two pulses may be transduced for every single initial reversal energised.
This video demonstrates *continuous* two dimensionally resonant *oscillation*, where force and resultant amplutide become tunably phase separated in time, and where there will be a brief damped physical 'back-EMF-like' reducing to zero oscillation if the energy source is removed (all pendulums suddenly not driven but still free to swing).
Whereas Gary and Hendershot clearly use critical mechanical armature positioning to induce on-going Schmitt Trigger like magnetic field reversals, where the energy necessary for oscillatory mechanical energisation (Hendershot - resonant) is effectively mechanically decoupled from any of the reactively related armature-core-coil losses and back-EMF effects, the theory of which we are indoctrinated in via AC Theory 'education' !!!!!
Cheers ........... Graham.
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