Quote from: plengo on July 28, 2011, 08:56:57 PM
Great work mondrasek, could you post a picture of your setup so that we can see the distance of your coils, rotor and the backing magnets?

Yikes!  The digicam is off with the Mrs. on her trip out West.  Won't be back until Sunday.  But you still wouldn't be able to see much:  My rotor is 1/2 in. thick plywood and the magnets are only 1/4 in. thick.  They sit in equally deep pockets drilled with a Forstner bit.  But they are not centered in the rotor.  They are actually a bit lower than center.

I'm not near the contraption now, but if I had to guess, I would say my ferrite is around 4mm distance to the rotor mags.  The ferrite protrudes ~2mm out of the rotor facing side of the coils (Singer type 15 bobbins).  The ferrite is 1 inch long and sticks out the back side of the coils about 13mm.

The backing mags are separated from the ferrites with pieces of 1/2 in. plywood again.

M.

Quote from: xenomorphlabs on July 29, 2011, 11:00:18 AM
@M : Is that RMS Voltages you talk about?

No.  In that explanation I was describing p2p voltages to illustrate my point.

Quote from: xenomorphlabs on July 29, 2011, 11:00:18 AM
If the peak2peak voltage of the 2nd coil pair is higher than dump camp voltage + FWBR drop then you will have current pulses.

This is how I see it.  And with any reasonable load, the cap will always be below p2p.  But I don't think the system is optimized/balanced for utilizing all coil pairs equally until the Vout p2p for each coil pair is matched

But what @Wattsup says may be right:  Current will still flow even if Vout from a coil pair is not exceeding the Dump Cap V + FWBR drop.  What do you think?  I'm still noodling on this.  I consider a multi battery device and know all batteries are providing a current even though they are at different voltage levels.  But that is not apples to apples.

M.

Quote from: mondrasek on July 29, 2011, 11:19:51 AM
No.  In that explanation I was describing p2p voltages to illustrate my point.

This is how I see it.  And with any reasonable load, the cap will always be below p2p.  But I don't think the system is optimized/balanced for utilizing all coil pairs equally until the Vout p2p for each coil pair is matched

But what @Wattsup says may be right:  Current will still flow even if Vout from a coil pair is not exceeding the Dump Cap V + FWBR drop.  What do you think?  I'm still noodling on this.  I consider a multi battery device and know all batteries are providing a current even though they are at different voltage levels.  But that is not apples to apples.

M.

There is hope )
Somewhere in this thread someone (sorry can't recall the name) posted that
he did see an increase of voltage after summing several coils pairs with their FWBRS in parallel, even though the common understanding (which is mainly derived from the simplified 2 branch-only resistor Kirchhoff model) is that a parallel circuit adds the currents and not the voltages.
The reason is that the signals from the individual coil pairs are out of phase to each other at an angle correlative to their angular spacing to each other.
After adding all coils pairs you will see a DC value on the cap that is much closer to the peak value of a coil pair.

Quote from: xenomorphlabs on July 29, 2011, 11:49:01 AM
There is hope )
Somewhere in this thread someone (sorry can't recall the name) posted that
he did see an increase of voltage after summing several coils pairs with their FWBRS in parallel, even though the common understanding (which is mainly derived from the simplified 2 branch-only resistor Kirchhoff model) is that a parallel circuit adds the currents and not the voltages.
The reason is that the signals from the individual coil pairs are out of phase to each other at an angle correlative to their angular spacing to each other.
After adding all coils pairs you will see a DC value on the cap that is much closer to the p2p value of a coil pair.

Sure, I've seen the Vout to load rise as additional coil pairs are brought on line by paralleling their outputs after the FWBRs.  This is logical since we are just adding more phases of p2p pulses to the Dump Cap.

But what I am still wondering is this:  If coil pair #1 can bring the Dump Cap to say 12 V.  Have a small enough load that in the lag before coil pair #2 can reach full voltage that the Dump Cap V only drops to 11 V.  Now if coil pair #2 can only achieve 10V max to the Dump Cap, is it still able to send some current through to the small load?  Or does the 11 V in the Dump Cap suppress that current?

M.

Mo, I wonder what would happen if instead of pair #2 going to a dump cap, you fed it back into pair # 1 or its dump cap, possibly utilizing a pair of diodes ?

Regards...