Muller Dynamo

[Tudi]

might be interesting to know : http://www.youtube.com/watch?v=9pTRtJ0jDjA

[plengo]

Right no Bolt. Anyway, for a change, here's a single pic. on my coil tune. Looking more like Romero's pic. More work to do.

cheers
chrisC

That's great Chris. How did you do it? schematics please.

Fausto.

[nul-points]

Hello everyone!
[...]
Never used one sa this is my first  . The signal is one picture from the gen coils and the other one from the total output after the bridge rectifier (all connected)

hi marius

good results from a soundcard -  thanks for sharing


a very interesting trace!

you can see on the combined o/p at approx time 4 where there is a gap between peaks for drive coil A, then at time 7 there is a gap for drive coil B

in between those gaps the peaks are not at the same height (voltage) - they are increasing in height with each peak (each gen coil o/p appears to 'build' on the previous one!)

so, if your single coil & combined o/p  traces have the same vertical (voltage) scale, then they are showing something interesting:  the highest peak voltage on the combined o/p is greater than the single coil o/p!

it's not so obvious with the soundcard method because it has to use AC coupling (you can see that the combined o/p trace is also balanced above & below the zero line, like the single coil) but the combined o/p will be DC after the FWBR

so the combined o/p peak value is approx 2.25 grads on your trace - but the single coil swings are only approx 1.5 grads in each direction ( therefore when rectified, each peak should still be 1.5 grads DC - actually a bit less due to diode volt drop)

did you have a load on the o/p of the combined FWBRs?  if so, what was the resistance?

if you didn't have a load, could you add one (say 10 - 30 ohms?) then retake the two traces and show us the results?

good work!

many thanks
np

http://docsfreelunch.blogspot.com

[k4zep]

Are you sure that the speed up under load is just a balance between motor and generator output.
I am really impressed about the speed up i get and maybe if I loop it like you do? Or maybe I can put an extra generating coil in with the speed up or.... so many things to try 

Good luck

Hi Scratch,

There is a crossover between current in the "motor" and current output in the Gen.  There is a balance that say if your wheel is running @ 14 VDC. 2000 RPM and 6VDC on the output Cap of the Gen, if you series them, you should get 20 volts across the motor but as you load the Gen down, the rpm's drop (that DAMN LENZ), current goes up in the motor too which pulls down the RPM, everything fights you, the total system voltage will stabilize at say 18V and everything is in equilibrium and you are in a positive feedback/boosted circuit.  There is a sweet spot where the max rpm, voltage/current out and current out all hit peak, if you vary the power supply voltage, monitoring the rail voltage to the motor and the Cap. voltage, min on power supply, max on cap voltage max on rail voltage and that is the sweet spot.  But each added coil while it should be boosting that voltage if put in series, loads, lowers RPM and it is a no win situation, again, that DAMN LENZ.  You and I can get a boost effect but I "think", unless we can get rid of LENZ, it will never go over 100%.  That is what I am fighting now.  BUT if you can get a lower impedance/resistance coil to work, MAYBE, it will put you over the top!!!! My problem with R's circuit, I just don't see him getting 15VDC out @ 1200 rpm with the size coils he uses, I can only get 6/7 V RMS, just doesn't happen for me, of course I'm ate up with LENZ and am not OU.!  There is something I just don't know about this device and have hit a wall.    But, It is a mv here, a mv there, each bit you save and add to the system........

On another though, It is educational to watch the coils feeding the bridge BEFORE the bridge with your scope and watch the diodes clipping the peak output while charging the cap, the more the load, the more the clipping as the voltage drops.  IT is a diode +/-  single pulse peak clipper/charger at peak,  where it only charges the cap when its voltage on the cap is lower than the load.

Another thought,  a very nice way to add the gen to the loop is to feed the motor through a diode, cathode to positive rail of motor and drive from power supply going through the diode, then put your gen output ACROSS that diode, Plus to the cathode, minus to the anode, floating Gen I assume.  any positive current/voltage above +.7VDC, give or take will be added to the total loop supply, a diode adding circuit.  Very simple, keeps your motor running, and you can take the Gen in and out.  Have fun with it! 

Sort of rambling.........

Respectfully
Ben K4ZEP

[k4zep]

got some gauss readings on my little unit: http://www.youtube.com/user/knapstersky#p/a/u/0/VedH_a5M8VY

the scope readings are from a hall probe positioned just under a gen coil. real time scope shot of what happens when adding
'core' material into the bobbin while the rotor spins.

take care.

nap

Really nice work!!!

Ben K4ZEP