Muller Dynamo

[chalamadad]

I managed to build a small  muller generator with 6 magnets on the rotor and 10 coils, 5 on each side.
I am driving it with just one set of coils.the strange thing is that from each set of coils I get about 7.2 volts then if I connect 2 coils together after the bridge I get 9.8 volts and having them all connected I get 14.4 volts with 1k resistor as load.Why is that? I was expected to have the amps increased not the voltage. Normally if we add 2 or more batteries in parallel we always get the same voltage and increasing only the amperage.Each bridge rectifier I built from 12 1n4007, 3 for each side of the bridge.
Any ideea?

David

I have no idea but I can confirm that effect with my build too.

[lumen]

Ok, here is a strange idea. Romero was somewhat tricky and secretive about winding coils so here is an interesting thought.

Lenz law simply indicates that anytime current flows in a conductor a field will be generated and the direction of the field is whats important here.
AND current is only induced in a coil from a MOVING field.

In this case, the approaching magnet induces the current in a direction that repels the approaching magnet and this is the same field direction as the stationary magnet. If there was another coil, possibly a flat wound, near the stationary magnet that was wound in the opposite direction as the coil near the moving magnet, then with these connected in series, THEN current induced in the coil from the moving magnet would flow also through the flat wound coil to oppose and reduce the field of the stationary magnet (at no extra cost) which would appear to the moving magnet as a reduction in the Lenz force.

On departure, the entire effect would reverse and again Lenz force would be less as the magnet leaves the coil.

Making sense?

[mondrasek]

Edit: Quick update, output unifilar is 0.8 Amps peak then goes down with the rotor slowdown to 0.7-0.6 Amps

Sorry, I thought you had posted load voltages as well earlier, but I see you only posted the unloaded ones?  Could you check the voltage you have on the bulb after the rotor slowdown with the unifilar and bi-fi?

[mondrasek]

I managed to build a small  muller generator with 6 magnets on the rotor and 10 coils, 5 on each side.
I am driving it with just one set of coils.the strange thing is that from each set of coils I get about 7.2 volts then if I connect 2 coils together after the bridge I get 9.8 volts and having them all connected I get 14.4 volts with 1k resistor as load.Why is that? I was expected to have the amps increased not the voltage. Normally if we add 2 or more batteries in parallel we always get the same voltage and increasing only the amperage.Each bridge rectifier I built from 12 1n4007, 3 for each side of the bridge.
Any ideea?

David

David, what is the resistance of your coil pairs?  Mine are very low and have performed as you describe as "expected".  I am very interested in how the differences in coil resistance effects performance in this system.  I would guess that there is a tradeoff between coil resistance and coil inductance and that an optimal coil would require maximizing inductance while minimizing resistance.  But I am not sure what the best balance would be, or how that is effected by loads, RPM, gaps, etc.

Thanks,

M.

[chalamadad]

Sorry, I thought you had posted load voltages as well earlier, but I see you only posted the unloaded ones?  Could you check the voltage you have on the bulb after the rotor slowdown with the unifilar and bi-fi?

Sure, voltage meter unifilar shows 0.24V and bifilar 0.12V. Lightbulb is directly connected to rectifier output. But rotor slows down significantly more with the bifilar. Both w/o caps.

I remember that increasing the load should increase the output at a certain range. But above some point everything will slow down. Caps might be needed for that effect.
With 25 watts the lightbulb a rather big load (driving the whole rig with less than 12 watts). Is it a better idea to test with a smaller load?