Muller Dynamo

[David70]

Are you using a dump cap on the o/p from the FWBRs?  If so, what size?

I have no cap after the bridge, only the 1k resistor and I am measuring the voltage across.
If I add a cap the output voltage increase by about 1.5 volts
David

[baroutologos]

@Baroutologos . Reference the Italian magnet Boy . I know that James Randi is not popular on these forums , but he has investigated and debunked several similar claims . All you do is sprinkle the human magnet with talcum powder and the "magnetism" disappears . The objects are just sticking   to sweat , and possibly some substance smeared on the skin . Notice that some of the attracted objects are non magnetic coins . Come on now , we stopped burning witches some time ago .

hey neptune,

Perhaps you are  right. Perhaps not. Why this boy story or similar all to be fakes? In the same light, what chances has the Romero device to be real?

[xenomorphlabs]

I want to correct something about my calculation on a previous page concerning the add-up of currents from the coil pairs.
It is very likely that the current will show a similar behaviour like the voltages when they are being added behind the rectifiers, meaning that they will get closer to the p2p value due to the phase-shifts between the generator coils being on a circle.

Today i tried to adapt the successful replication of Plengo's cap circuit to smaller coils with lower inductance, but for some reason it did not work.

I got the rotor speeding up under a 1 Ohm load with 3mA of current through it with a microwave oven fan coil (0.75 H or 750 mH) and a 4 uF cap in parallel with the 10 uF caps.
With my smaller coil of 10 mH and a parallel cap of 247 uF i should get the same resonance, but the rotor slows down when adding a load.

Maybe the generator coil itself needs to be already close to the resonance frequency itself for this effect to manifest. So only a small capacitance needs to be charged.
Maybe that's why Romero avoided the use of caps and just tried it with the coils and magnets alone.

If i didn't have an error creep up on me, then i don't support the idea anymore that the mere phase shift between current and voltage is responsible for the speed-up because it was phase-shifted in both experiments.
So no idea why actually the rotor speeds up at all

I could try to increase the frequency, but i don't want to risk the rotor becoming unstable or wind coils with thick wire and thousands of turns hehe.

[mondrasek]

I have no cap after the bridge, only the 1k resistor and I am measuring the voltage across.
If I add a cap the output voltage increase by about 1.5 volts
David

This would be why your voltage is not stabilizing and appears to increase as you add in parallel coils.  The output from one FWBR is not DC.  It is rectified AC (somewhat).  If you measure that with an analog meter you would get the average, not the peak.  Adding in more coils overlays similar rectified AC signals at a phase difference equal to the spacing of your coils.  So the voltage you can measure goes up as more peaks per second are being output.

I believe if you measure with a true RMS DMM you should get similar results.  And if you measure without an RMS DMM you may get nothing or garbage as it will likely only be able to look for ~60Hz signals.

You need the dump cap to read across if you want to measure DC.

[chalamadad]

With the rotor and coil spacing getting even closer in my last set of tests I was able to confirm that the coil's reaction to backing magnets has returned.  Since the effect was not evident at the farther spacings, and was definitely very strong when I had preliminary tests with the coils as close as possible, I would say the effect increases as the rotor/coil spacing decreases.

While looking at the voltage wave form while introducing a backing magnet I could see that the wave shape changed slightly, but did not gain appreciably in amplitude.  It appeared that the "flip" portion of the voltage curve that happens when the the rotor magnets passes TDC of the coil becomes steeper.  I was planning to get scope shots but ran out of time yesterday.

As I recall from my previous testing at minimal rotor/coil spacing, the change in the voltage curve begins with that same flip portion of the curve becoming steeper and then the amplitude being increased as the magnets are brought in from far away towards the back of the ferrite cores.  At a critical distance the effect begins to reverse.  At too close, the voltage is even decreased.  If in contact with the ferrite, the voltage is decreased dramatically.

In that previous testing I noticed that the strength of the backing magnets also played a part.  But the distance from the back of the ferrite for maximizing the effect did not appear to change.  Once a magnet was placed at the correct distance, the voltage could be increase further by increasing the strength by adding more magnets to a point of diminishing returns.  But changing the distance at all could not improve the voltage further.

Please note that those preliminary tests were fairly gross and there may be some fine adjustments possible that I did not witness.

Nice. Can you estimate the optimal distance?

I played with the halls today. Had two bifilar coilpairs connected into cap and the shorted by ampmeter. I got so far as 0.45 Amps input and 0.15 Amps output. Tested at 9 Volts in. Not concerned about o/p voltage - the bifilar will have enough. The attracting hall pulse had to be long. Speed went up when increasing the distance to the magnets (wide angle - long pulse). The repelling is positioned best near to the magnet (short angle - short pulse) and just at the edge of the coil, draw can be minimized without speed loss.