Muller Dynamo

[joefr]

Hi Chamalad


I attached the schematic I made with help of Gyula for Arduino controlled BEMF Cap charge and discharge circuit, it works very good, much better than with SSR solid state relays before. The Cap you charge and discharge in the schematic is C1. The only bad thing is that we need separate battery to power driver for mosfets. But we can solve this with little generator coil like Kone did in his circuits.


JoeFR

[konehead]

Hi Chal

Your machine is so cool with the singing coil every pass of the magnet - it is shame to be using reed switch with it since you know how they burn out and get stuck (literally welded  closed) so easily and if you cant go above 14V forget about them eh!
Anyways there are lots of mosfets pretty cheap that will do 20 or 40 amps and 500V which should be very reliable for you -the IRF460 is good one - an "NPN" type this is,  and lots of others too you cn find in google search in PNP or NPN...

[konehead]

Hi Chal and Marius

Just because I always talk about shorting ath the peaks please dont take my advice and abandone all the good work you guys  are doing with the continuous-short speed up effect and all.....it could be that Romero did used the continuous short as sort of "test" to see if he "got it" ...
then in actual looper or OU rig he did pulse-out peak power into that big DC cap but I dont know jsut another theory but still look at everything under the sun every which way while you "are there" -
In theory no reason to leave a generator coil "ON" into cap or load after the peak since voltage is never any higher - BUT maybe with continuous-short it oscillates/rings the coil so actually you should leave it ON after peak - same with the ringing/singing coil that rings with no shroting going on - maybe since its ringing, you want to let it ring after the peak....dont know for sure and dont let me confuse or distract or send you down any sort of backwards road when you are already going forward jsut fine.

[konehead]

Hi all

Another circuit below I just drew up to show how to pulse a motor coil with a capacitor only, and the capacitor is charged up by the battery and battery never "sees" the load -only the cap does....
the battery/power source could be instead rectified generator coils, or backemf/recoil from 2nd motor coil circuit or both...
I tested this circuit tonight to make sure everything is correct....
This I have always considered the "first step" for a looping motor-generator, since if you have enough power to fill up that RUN CAP so it can run the motor and get rid of the battery, it will loop and run by itself...
Note how the source leads and the drain leads of the two mosfets go in their directions and  connections to the coil, battery/power source and the run cap...it has to be like this, using NPN mosfets at least...

It takes a 1000uf run cap to run my small 4 magnet RomeroUK variant  which runs on around 70ma and 12V at around 800rpm on singel motor coil circuit....so if I can fillup a 1000uf run cap from the backemf/recoil of 2nd motor coil circuit, and also some of the generator coils, all without it making motor-draw go up in consequence ("non-reflective") then it should loop and self sustain....(should)

[chalamadad]

I think it can be done without the reed or mosfet. I can have a constant output of +1V above input when feeding back to battery constantly without the reed or any switching at all. This requires some hardcore tuning. The input to the driver coil must be absolutely minimum so the battery can stay charged. The biasing magnets can help adjusting the rotor speed. A lower rotor speed can be beneficial as the battery will have more time to refill between the pulses. I will get back to this in a few days when I have some more time.

Chal