Muller Dynamo

[mariuscivic]

Hi Joefr!

This is how i connected everything. One question: is it posible feeding the first driving circuit with the output from the leds without shorting or burning anything?
Thanks!

[joefr]

Hi Mariuscivic


Thanks for schematic. I will try today the same as you did with mosfet driver and we will see if I get similar results.


One question: is it posible feeding the first driving circuit with the output from the leds without shorting or burning anything?
Good question. I think here on the forum  are more experienced electronic gurus which will help you with this question.
This is something we all want lopping output to input and running without battery


JoeFR

[konehead]

Hi Joe and Mariu

Joe - I dont get how the circuit with "no hall" works (?) I was thinking it must be like the Bedini schoolgirl motor, with a trigger-wind for the gate/base of transistor, but I dont see one in your schematic so cant figure out how it works??

Mariu-

I wouldnt stuff that HV backemf/recoil lighting up the LEDs right back into the 1st drive circuit as is since for sure the voltage spikes will blow up something...have it hit a DC cap first, the cap will catch and absorb all the destrucitve stuff....Bedini calls it to "condition" the backemfspikes first... (I think)

The last drawing I put up here should be perfect for what you want to do - the schematic with the "RUN CAP" that is pulsed-charged by a 12V battery.

Seems all you would have to do is take the LEDs out of circuit, and put a fairly HV size DC capacitor there instead.

Then have the 1st drive circuit pull power from this DC capacitor to pulse the motor coil......maybe have this capacitor in paralell with a battery that is running the whole show.  Later on, take the battery out of the picture and loop it!

Probably the way you would want to do it is have the backemf/recoil of the 1st dirve coil circuit fill up "cap A"...

and cap A supplys power to the 2nd drive coil circuit...(maybe have 2nd battery here at beginning of experient too, in paralell with cap A then take it out later to loop it too)
then, have the 2nd drive coil circuit's backemf/recoil fill up cap B - - and cap B supplys power to the 1st drive coil circuit - and also mabye again, have a battery in paralell with that cap B too.....so two batteries, two caps, two motorcoil/drive circuits, two backemf/recoil circuits.....

you might have problems "returning" power back to those caps with transistor and mosfets because of that problem of the "source" lead of mosfet will connect to ground in NPN (and connects to positive in PNP) so that is one reason for SWITCHING out the backemf - which I also drew up circuit for a few days back, with one circuit taking out backemf with single diode, and similar circuit doing same thing, but there is 2nd swtich that connects the backemf about 5 degrees retarded......this caused speed up wiht 6ohm resistor straight across DC cap but that is other subject.

Anyways what I am always talking about with two-stage output circuit :"fill up cap with no resistance on it (stage one) then disconnect cap from coil and pulse cap to load with coil disconnected (stage two)
....is accomplished in simple fashion when you "SWITCH-OUT" the backemf/recoil into that cap - since the 2nd swithc when it turns it OFF has disconnected the backemf/recoil circuit to the cap from coil,
so anytime that 2nd is OFF is a good time to pulse that cap into a load, which can be the 2nd drive circuit.

You only need the backemf/recoil circuit ON during the short time (a bit during and abit after) the motor/drive switch turns OFF - since that is when the backwards expolsion of spikes and backemf occurs.  Thats why I say about 5 degrees retarded....

All this said, it might work out to be very very simple for you, and no need for any switch-out backemf/recoil circuit, jsut dump into cap that runs the "other" drive circuit, and vice versa....the RomeroUK design is like two motors in one, both isolated from one antoher just as long as you use seperate batteries (or caps eh)  to run each drive circuit....

I have small RomeroUK 4 magnet variant and using the RUN CAP circuit, I have a 1000uf cap that runs a single motor coil circuit in testing, and this 1000uf cap is pulsed charged by a 12V battery 4 times a revolution- so I jsut added another halleffect before the hall effect that does the motor coil-pulsing......
so same pulse width and same halleffect as drive/motor circuit has, for the RUN CAP to be charged by battery....this motor runs at around 840rpm on 70ma and 12V....RPMS drop a bit when the run cap is working, but it also drops draw abit less too so no loss is going on....if you go with a 500uf cap RPMS drop mabye down to 400rpm....400uf  even less rpms  and so on - you could make a speed controller for pulsed DC motors with a row of caps and run cap circuit swtiching in caps of different UF values - jsut paralell them in or out but that is other subject too...

[joefr]

Hi Kone


Joe - I dont get how the circuit with "no hall" works (?)
Kone that is the best of this circuit you dont need hall or trigger coil. You just need drive coil and magnets on the rotor. I have tried this circuit with all different drive coils I have with core without core and it works very efficient.


Today I have tried the same as Mariuscivic, drive one coil from battery and then use BEMF from this drive coil to charge a CAP and drive second coil energy stored in CAP.
It works very good the CAP fils to 18volts and stay there. And now I have to use BEMF from second drive coil. For drive circuit I used no hall mosfet driver posted earlier.

Here is the scope shot of no hall driver:


JoeFR

[gyulasun]

Hello. Check out my version of my board and try it.
(Sorry, I do not speak English, this text was translated by Google).

Hello mex,

I think your schematic seems ok and the good thing is you use a switch at both ends of the coil, this isolates the coil completely from the rest of the circuit when the coil is switched off.
Thanks for your efforts.

rgds,  Gyula