Muller Dynamo

[konehead]

hi Mariusivic

I put the coil-shorting circuit up above - its not that hard to wire up - ...maybe $15 to $20USD in parts - the halleffect is a A 1120LUA-T whihc you can find on digi-key and order online...
....IRFP460 mosfets are nice ones since they handle 20A and 500V and should short coils fine no problem...
You sill need a circuit for each coil being shorted actually, so its maybe going to be too expensive...dont let me distract you - you are doing fine as is!
Still not sure of when you short your coils before the bridge "with the reed swtihc" - is this a conditunous dead short, or is the reed swtich being triggered by the rotor mangets?
you might need another disc on your motor/generator, that is made specifically to control the timing, with some very small magnets doing the triggering so you can fine-tune better...it would have to be fairly far away from your rotor magnets somehow so they dont interfere...

[DeepCut]

About bloody time.

After days of testing (and far too much money spent on various gauges of wire !) i have a result :

Speed Under Load Test.


COIL :

24 SWG (0.56mm, 23 AWG is closest at 0.573mm)

L = 53 mH
R = 60 Ohms

55mm long and 37mm wide.

Coil former barrel diameter is 15mm.

Unsure of number of turns since shop bought.


ROTOR :

VHS motor.

Diameter : 60mm


MAGNETS :

8 x 10mm diameter x 5mm height disc magnets, grade N42.
Magnets arranged N/S.


DRIVE CIRCUITRY :

Standard SSG drive circuit with charging diode removed.


RESULTS :

At 1100 RPM, shorting the coil increased the RPM to 1290

The input current went up from 115 mA to 120 mA

I will now do more testing and post results.

[konehead]

hi Deepcut

What kind of cores do you have and their size?
is it aircore?
Whats the voltage input?
Interesting you have N-S mangets and got speed up...
I assume no backing magnets behind cores too?
thanks

[DeepCut]

hi Deepcut

What kind of cores do you have and their size?
is it aircore?
Whats the voltage input?
Interesting you have N-S mangets and got speed up...
I assume no backing magnets behind cores too?
thanks

Hi Kone, the core is a bolt from a masonry anchor shield, it is 8mm in diameter and 70mm long, i have put the 'head' end of the bolt at the back of the gen coil.

Those figures in my above post were for a 5 volt input and, yes, there are no biasing magnets.

I have been testing it all the way through it's RPM's and i have found a few spots where the RPM goes up and the current draw remains the same and i have just found my first spot where the RPM goes up and the current draw goes down

I will post the results as soon as i have tested with the full range of my little DC bench PSU, it only does 18 VDC @ 2 Amps max so it won't take long, i just have to convince my girlfriend that the noise is worth it because she wants to watch TV !

BTW i have no idea what material these cores are made from but i have emailed the manufacturer so should get a reply by Monday.

It's a really interesting phenomenon and i can't wait to see how it responds to 'real world' loads.

My camera battery is charging and i will do a video of the most impressive current-down/RPM-up sweet spot i find, as well as posting results in a spreadsheet.

[FreeEnergyInfo]

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
[/quote]

THANKS RomeroUK .....
http://freeenergylt.narod2.ru/muller_dynamo/
http://underservice.org/index.php?topic=3.0

http://underservice.org/index.php?board=2.0