Muller Dynamo

[eastcoastwilly]

I wish, not that easy. Having 12v x 500ma input and only 3v x 18ma output is way too far from OU. May be there is some more magic in the buffer capacitor that Romero uses and when ALL coils are together. I also will have to reduce that input power consumption a lot.

Fausto.

Plengo,

What was the load you were running. Those led's were running on 3 volts @ 18 mA ?

[plengo]

Plengo,

What was the load you were running. Those led's were running on 3 volts @ 18 mA ?

The load is shown on the video. It is a one ohm resistor on the output of the FWBR and one ohm resistor in series with the 2 gen coils.

The LEDs on the input is just to show the BEMF of the drive coil. If the motor is indeed not being affected by the load I noticed that those LEDs do not use any extra energy only the BEMF.

Fausto.

[bolt]

The load is shown on the video. It is a one ohm resistor on the output of the FWBR and one ohm resistor in series with the 2 gen coils.

The LEDs on the input is just to show the BEMF of the drive coil. If the motor is indeed not being affected by the load I noticed that those LEDs do not use any extra energy only the BEMF.

Fausto.

Very Good! You are heading in the right direction.   A couple of things though. Don't be concerned at all with the i/p watts for now in fact  900 rpm is a bit slow. Crank it up to around 1500-2000 rpm even if it doubles the watts its not important at this time...just ignore it.

You need a LARGE dump cap biggest you can find where you are going to collect everything into. Even with ONE coil make sure you dump into that cap and you take your loads from there instead and NOT from individual coils. When testing another coil your disconnect the others going to the dump cap EXCEPT the one you are tuning till everything completed then add them all into together.

When  tuning to loads think about what your final load will be? Lets say its  12v 24 watt lamp which is 2 amps or 2 ohm load.  This load is going to be shared in effect by 10 generator coils all connected  all parallel via each bridge  to the large dump cap so each coil needs to make an impedance match of 20 ohms not 1 ohm as collectively  they will make up for the 2 ohm 24 watt lamp.

Think of each coil as an amplifier output and you want to drive 8 ohm speaker systems.  If you have 2 off 8 ohm speaker in parallel you end up with a 4 ohm load.

If you get 24 watts OU and 12 watts required to drive it you still have an OU rig.

Take another look at those wave forms on your scope they are something close but still a long way off tune. Each side of the sine spikes should be symmetrical  where yours has a very sharp edge on one side then a zero point flat the other. The two series caps you have there may not be necessary usually you can tune a coil with just one cap to force it out of phase correctly but do what you feel best.

The last point is you can not skimp on cap tuning its VERY VERY VERY critical to find the right values then move the back end magnet a millimetre at a time to tune the inductance slightly to get the perfect match.  When you find the magic spot your voltage will also shoot up a lot into the dump cap. Unless you are damn lucky  winding coils with the same inductance to cancel out perfect i think you will always need to do some cap tuning and or adjust the back end magnet using different size plastic shims under the washer to adjust the bias.

Anyway i think you are doing well.

[oscar]

@all
Sadly, I don't think that I would be able to cope with a gazillion questions

Hi penno64,
I hope that your setup will continue to perform as you describe.
If it turns out to be true, I propose that I will open a new thread
"penno64's FAQs regarding his RomeroUK Muller replication"
or such like.
I would then collect all incoming questions in the first post of this new thread and copy your replies into this list as well (provided Harti grants me the rights to continuously edit that posting).
This way you would not have to answer questions twice but could direct everybody to that "FAQ-page".

[baroutologos]

And here is the schematic I use:

Hello Keykshin

I really enjoyed your video. A rough setup demonstrating something beautifully. Thanks for sharing.

By the way, i want to stress from your circuit diagram, as many have noticed also, that the cap put in parallel to the coil and making the buzzing sound, is not running on its L (coil) C (cap) fundamental resonant frequency rather than harmonic. i think the o-scope shows that also. (much higher frequency oscillations)



Key Question: When connected the load (bulb) or the power source to the coil, (that serves also as motor-collector coil) does the capacitor makes a difference there?