Muller Dynamo

[romerouk]

I'm getting frustrated not being able to get 'The Effect'.

I messaged Thane Heins on youtoob he wrote back this :

"Dear Gary,

A video would be good - however a coil resistance of 19.2 ohms is NOT enough, overunityguide shows 385 ohms or so with an inductance of 2.18 Henries. A 3 k ohm coil is way TOO HIGH and will most likely consume any delayed current in the internal resistance of the coil...

My motor professor in college had a saying which said, "if first you don't succeed - go back and follow the instructions."

Why not make a 385 ohm coil with an inductance of 2 Henries and see what happens?

Cheers
Thane"

Now i have to wait until the right size of wire is in stock that will get (close to) those two values.

I did a spreadshet where you input all your details and it outputs the minimum RPM needed to achieve the effect but i'm not sure how it fits with reality !

http://www.mediafire.com/?o6op61x2elm9ryi

Hi DeepCut,
check the pictures below to see the values of one of my coils who are working good for the speen under load. Maybe that helps...
38.1 mH
21.2 Ohms

Regards,
Romero

[mariuscivic]

Hi everyone!

I finaly figured out how to speed with the bridge rectifier.
I'm shorting one coil with a reed before the BR and the rpm goes up and charges the cap(22000uF). But i need some electronic circuit to do that.The metal from the reed ads drag to the rotor and at 5000 rpm it doesn't behaves soo good.

[AlphaTech]

Hi RomeroUK and Konehead,

RomeroUK: Hector told that your looper was working because of the driving coil and not because of the generator coil. The fact that you saw the effect appears, disappears, appears, etc. while the RPM goes up comfirms his theory. This is because of the ferro-resonance of your ferrite core so you step in a subharmonic, then goes out of this harmonic and then step in the next subharmonic of the core as the speed inscrease. Your capacitor acts as a pulser and as a receiver. The reverse diode acts to collect the radiant energy. So this extra energy is what drive your rotor while your generator coils are collecting this transformed energy (from radiant energy-->kinetic energy-->electricity from generator coils). This kind of circuit is more known as Coil Banger.

If you want to verify it yourself and for me (and everyone else): take the exact drive circuit you had (100uF cap, PNP bipolar transitor, reverse diode (1N4007), coils with ferrite core and hall effect sensor) but this time, don't put the reverse diode (1N4007). You should now see the effect disappears at any speed if I'm right. No extra energy without reverse diode. If you CAN make a looper WITHOUT reverse diode, well, I'm wrong.

AT

[minde4000]

This is because of the ferro-resonance of your ferrite core so you step in a subharmonic, then goes out of this harmonic and then step in the next subharmonic of the core as the speed inscrease.
AT

I really dont think this is because of ferro resonance.  Ferrite resonates close to and at MHz range. Here they work with ~100 < 1000 Hz.
Looks like charge(drive)/discharge(generate) timing and these biasing magnets. But then what do I know..

Minde

[konehead]

hi Mariusivic

I am not sure what you mean - are you shorting the coil "with a reed" before the bridge rectifirer?

This would mean that you are "swtich-shorting" the generator coil??? and not continuous short???

If so, I bet also the timing of your reed swiych when things speed up  happens at peaks of sinewave too - if not, try that, and I will bet you will get best results...

IF you want to do this solid state, use high-amperage rated mosfets that have very low resistance to them...maybe put 4 or 5 in paralell to lower resistance even if you want to spend a few more bucks.
I have best results "swtich-shorting" with bidirectionally hooked up mosfets (gates and source of two mosfets connect, and swtichign happens betweeen the two drains)
Bidirectional mosfets are for AC switching - which I will guess is what you have going, since you are switching "before" the bridge rectifier...(if this is what you are doing?)
try some IRFP460 NPN mosfets (20A and 500V rated) - put a couple of these together bidirectional and it should be good to short coils....things like solid state relays, some transistors, SCRs wont work AT ALL shorting coils since their resistance is so high - reeds work great for shorting coils but they arent very reliable and things arent so perfect with them as you know.
Use a 4421 driver with the P460 mosfets is good if you want to try that..let me know if you want a complete circuit to short coils at peaks with hall effects and mosfets....