My only insight was that we are not using the same gap between the magnet and ferrite cores. Romero said he uses 3.5 mm If this is not it and proved wrong, than I'll be back at mystefying these "flat spots" 
just added a few more charts above. I'll do more sims by widening the peaks.
EM
I would think that Peter has tried a variety of rotor/coil spacings by now, and he still has not seen that flat spot as far as I am aware. I'm not in agreement with Grumpy and WW on this one. TDC I believe is near the peak in the trace. It may be more correct to state that TDC actually covers a small range on either side of exact TDC. The negative transition after the positive peak begins because of no net a reduced change in flux at that point. The coil is at the edge of the "null zone". That carries the trace down to the "zero" level. From there, the magnet is beginning to depart out of the "null zone", and again the coil experiences an intense change in flux which drives the voltage below zero to the negative peak. That "null zone" is not nearly wide enough to cause the big flat spot we see in Romero's scope trace. .99 EDIT: changed "no net" to "a reduced"
« Last Edit: 2011-06-28, 00:25:35 by poynt99 »
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