10k RPM Mini Bedini Three Pole Experimental

[Farmhand]

Hi all my first post here, i've been reading this and other forums for ages and have started to experiment with bedini energisers, lots of batteries on the farm to help.

Video clips "good for a laugh"

YouTube - Mini Three Pole SG at 10k Rpm

YouTube - Mini Bedini three pole SSG at 7500 RPM

Any way I have built a miniture three pole setup on a board to experiment and decide which way to go and I am having a hard time wiping the grin from my face, this little thing is a powerfull energiser for it's size and can just about condition a car battery. A 7 AH battery is no probs it can run on 12/24/28 volts and draws between 75 to 250 Ma at 28 v depending on the battery being charged, I have measured the frequency at the collector at over 1 khz but i'm sure it is mutiple pulsing.

It can spin over ten thosand rpm but charges better at certain rpm ranges lower than that. Best charging with lowest current draw and fastest rpm sweet spot is about 5600 rpm.

I have started to get the parts together to build a bigger one and learn as I go, I am self taught and don't know a lot, but i'll get there.

Next step is a three magnet three coil bifilar wound with a 120 mm alloy rotor.

Cheers all,

[minoly]

Fantastic!

Very nice build
It looks like it offers many opportunities for experimentation. Would the new rotor be able to fit in the same build, same coils…? This would be a good comparative test. Also experiment w/ different coils. And swap out the tranys w/ MJL21194’s to see if there is a difference.
Nice pick up coil, Curious how many ohms you have across each power coil. I tend to lean toward 6.5 ohms on my small builds using 26awg for the power coils, But my charging does not seem to be as fast as yours.

Also, I only see two transistors this must mean you do not have a bifilar for triggering. I notice when I use a bifilar+ for trigger, I get more speed and faster charging. Perhaps I’ll do a few runs separating it out to make sure.
Thanks for sharing; a couple of my vids are here: YouTube - min2oly's Channel

Oh, did I forget to mention: I like your cap-dump method.

[Farmhand]

Thanks minoly There is three transistors two 2n3055's and a stray tip31c on the left hand coil screwed to the coil mounting screw only had two 2n's, the wire I used was very thin and was wound bifilar on a spool so I wound two wires paralell on the power coils and four on the main coil two for power two for trigger coils are 18 ohms each about 250 winds maybe more. I even went to the trouble to make bedini style cores from 1.6 mm steel wire painted

The gen coil can light 4 x 5mm led's and gets up to 3.2 volts.

New rotor will be for a bigger machine for tractor batteries and such.

Thanks for the links and the reply.

[minoly]

Thanks minoly There is three transistors two 2n3055's and a stray tip31c on the left hand coil screwed to the coil mounting screw only had two 2n's, the wire I used was very thin and was wound bifilar on a spool so I wound two wires paralell on the power coils and four on the main coil two for power two for trigger coils are 18 ohms each about 250 winds maybe more. I even went to the trouble to make bedini style cores from 1.6 mm steel wire painted

The gen coil can light 4 x 5mm led's and gets up to 3.2 volts.

New rotor will be for a bigger machine for tractor batteries and such.

Thanks for the links and the reply.

I get it, very efficient for mix and match
Is the 18 ohms per wire, or measured in parallel?
not many first time builders will go all 9 yards w/ a cap dump
I think I have some 31 awg wire lying around, gonna have to give it a go now.
Thanks....

[Farmhand]

Thats 18 ohms in parallel, the cap dump setup works ok it's an IGBT with 1200 uf of 400 volt caps and dumps about 6 volts above the battery, but I was using a straight output in the vids I think it is more efficient but harsh on the gel cells, hence the cap dumper.

I had to clean the bearings real good then lube em with sewing machine oil to get the noise down at high rpms, seems to be a very good desufator.

Oh I forgot to mention the transistors stay cold and the coils gain about 6 degree's celcius at full tilt, my only concern is the magnets coming off though they are soft linolium fridge type magnets at 10000 rpm it is spinning 166 times a second its a 50 mm rotor. I think that works out to 26 meters a second, maybe still dangerous a bit.