On Sun, 04 Jun 2006 05:56:48 -0000
"Norm Fletcher" <fletchmo47@...> wrote
> In looking at your output waveforms, it appears that your MEG is still a
> "Biased transformer". Note the skewed output waveform. Try changing the
> input frequency/voltage so that the output is a perfect sinewave.
> (believe me, that's the trick!) Only then is the output a result of only
> switching the flux of your magnet. Right now, the primary is
> producing external flux and that flux is intercepting the secondaries. The
> MEG has become a transformer (like the rest of us) with a COP<1

I have 2 comments, for which I hope to see a reply:
Since the core is not continuously saturated, the primary will always couple
highly to the secondary on it's leg. From previous posts indicating that keeping
the field created by the primary in the core is critical, it would follow that
this coupling would be large. As the thickness to width (c/b) of the secondary
increases, the coupling of the secondary to the core decreases. At some point
the coupling to the primary could be loose enough to clearly observe the self
resonance of this core. You can see this clearly in old TV fly-back
transformers. Could this secondary resonance be what you are tuning for?


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