Muller Dynamo

[David70]

@mondrasek
each coil is 3.9ohm, about 8 ohm for a pair.I use 4 fillar connected as tesla style, but I am not sure about the wire type... maybe 26 awg. If I connect a capacitor 10uf AC in series before the bridge then I get speed under load.unfortunately I have only one AC capacitor and I cannot test all coils with a capacitor connected.I tried a 10uf DC capacitor and is not working.

David

[chalamadad]

@mondrasek
each coil is 3.9ohm, about 8 ohm for a pair.I use 4 fillar connected as tesla style, but I am not sure about the wire type... maybe 26 awg. If I connect a capacitor 10uf AC in series before the bridge then I get speed under load.unfortunately I have only one AC capacitor and I cannot test all coils with a capacitor connected.I tried a 10uf DC capacitor and is not working.

David

Is "speed under load" compared to loaded or unloaded?

[David70]

Is "speed under load" compared to loaded or unloaded?

i don't have something to measure the rpm but when I connect the 1k resistor i can hear the speed increasing.i  just tried 2 1k resistors in parallel and the speed increases even more and the resistors are getting very hot.

[poynt99]

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

This is not too strange when understood.

First, realize that the load you are decribing is actually a combination of the resistor and output filter capacitor. The output voltage is actually an average of the absolute value of what the coils are putting out. With one coil, or one pair of coils, the average voltage measured post FWBR will be somewhat less than the peak voltage at the coil(s). However, as you add more and more coils in parallel, the average of the post FWBR voltage will increase because you have several more outputs combining to "prop up" the capacitor voltage. It is effectively analogous to lowering the output impedance.

.99

[xenomorphlabs]

Just made a tesla-bifilar out of Litz wire and noticed that the resistance
does not double in comparison to the same coil connected "normally" as i had posted earlier. It shows only a slight increase, which actually makes sense because still the same length of wire is being used no matter how you connect it.
But the inductance has quadrupled (!)

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

So Mondrasek, this is what you talk about increasing the inductance while minimizing resistance